./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.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/popl20-nonblocking-cntr.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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --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 21:15:14,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:15:14,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:15:14,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:15:14,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:15:14,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:15:14,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:15:14,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:15:14,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:15:14,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:15:14,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:15:14,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:15:14,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:15:14,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:15:14,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:15:14,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:15:14,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:15:14,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:15:14,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:15:14,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:15:14,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:15:14,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:15:14,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:15:14,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:15:14,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:15:14,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:15:14,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:15:14,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:15:14,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:15:14,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:15:14,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:15:14,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:15:14,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:15:14,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:15:14,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:15:14,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:15:14,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:15:14,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:15:14,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:15:14,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:15:14,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:15:14,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:15:14,878 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:15:14,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:15:14,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:15:14,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:15:14,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:15:14,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:15:14,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:15:14,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:15:14,881 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:15:14,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:15:14,882 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:15:14,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:15:14,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:15:14,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:15:14,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:15:14,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:15:14,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:15:14,884 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:15:14,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:15:14,884 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:15:14,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:15:14,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:15:14,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:15:14,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:15:14,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:15:14,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:15:14,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:15:14,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:15:14,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:15:14,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:15:14,886 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:15:14,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:15:14,887 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:15:14,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:15:14,887 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:15:14,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:15:15,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:15:15,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:15:15,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:15:15,224 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:15:15,224 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:15:15,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-30 21:15:16,430 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:15:16,569 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:15:16,569 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-30 21:15:16,576 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/786e8dbaa/b01bcba26d5447bda1182a10af4c96aa/FLAG5075b338e [2023-08-30 21:15:16,588 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/786e8dbaa/b01bcba26d5447bda1182a10af4c96aa [2023-08-30 21:15:16,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:15:16,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:15:16,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:15:16,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:15:16,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:15:16,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b1f562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16, skipping insertion in model container [2023-08-30 21:15:16,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:15:16,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:15:16,793 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-08-30 21:15:16,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:15:16,806 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:15:16,829 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-08-30 21:15:16,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:15:16,841 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:15:16,842 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:15:16,847 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:15:16,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16 WrapperNode [2023-08-30 21:15:16,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:15:16,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:15:16,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:15:16,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:15:16,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,882 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-08-30 21:15:16,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:15:16,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:15:16,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:15:16,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:15:16,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,917 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:15:16,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:15:16,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:15:16,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:15:16,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (1/1) ... [2023-08-30 21:15:16,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:15:16,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:16,958 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 21:15:16,966 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 21:15:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:15:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:15:16,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:15:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:15:16,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:15:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:15:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:15:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:15:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:15:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:15:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:15:16,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:15:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:15:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:15:16,993 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 21:15:17,120 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:15:17,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:15:17,286 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:15:17,314 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:15:17,315 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 21:15:17,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:15:17 BoogieIcfgContainer [2023-08-30 21:15:17,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:15:17,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:15:17,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:15:17,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:15:17,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:15:16" (1/3) ... [2023-08-30 21:15:17,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307fae29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:15:17, skipping insertion in model container [2023-08-30 21:15:17,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:15:16" (2/3) ... [2023-08-30 21:15:17,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307fae29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:15:17, skipping insertion in model container [2023-08-30 21:15:17,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:15:17" (3/3) ... [2023-08-30 21:15:17,324 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-08-30 21:15:17,331 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:15:17,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:15:17,339 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:15:17,339 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:15:17,391 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:15:17,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 168 flow [2023-08-30 21:15:17,484 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-08-30 21:15:17,484 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:15:17,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-08-30 21:15:17,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 168 flow [2023-08-30 21:15:17,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 66 transitions, 144 flow [2023-08-30 21:15:17,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:15:17,508 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 144 flow [2023-08-30 21:15:17,512 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 144 flow [2023-08-30 21:15:17,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 144 flow [2023-08-30 21:15:17,545 INFO L130 PetriNetUnfolder]: 6/66 cut-off events. [2023-08-30 21:15:17,545 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:15:17,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 66 events. 6/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-08-30 21:15:17,547 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-08-30 21:15:19,613 INFO L134 LiptonReduction]: Checked pairs total: 413 [2023-08-30 21:15:19,613 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-30 21:15:19,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:15:19,627 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;@5abae2c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:15:19,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:15:19,631 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 21:15:19,631 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:15:19,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:19,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:19,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:19,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1270362665, now seen corresponding path program 1 times [2023-08-30 21:15:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:19,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687006279] [2023-08-30 21:15:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:19,972 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 21:15:19,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:19,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687006279] [2023-08-30 21:15:19,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687006279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:15:19,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:15:19,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:15:19,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224973219] [2023-08-30 21:15:19,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:15:19,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:15:20,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:20,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:15:20,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:15:20,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2023-08-30 21:15:20,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 21:15:20,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:20,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2023-08-30 21:15:20,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:20,122 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-08-30 21:15:20,122 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 21:15:20,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 251 event pairs, 23 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-08-30 21:15:20,124 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-30 21:15:20,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-30 21:15:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:15:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:15:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-08-30 21:15:20,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835766423357664 [2023-08-30 21:15:20,135 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-08-30 21:15:20,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-08-30 21:15:20,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:20,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-08-30 21:15:20,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 21:15:20,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 21:15:20,146 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 21:15:20,147 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 265 transitions. [2023-08-30 21:15:20,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-30 21:15:20,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:15:20,151 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-30 21:15:20,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-30 21:15:20,155 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-30 21:15:20,155 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-30 21:15:20,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 21:15:20,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:20,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:20,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:15:20,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:20,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash 33938299, now seen corresponding path program 1 times [2023-08-30 21:15:20,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:20,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29404712] [2023-08-30 21:15:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:20,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:20,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:20,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29404712] [2023-08-30 21:15:20,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29404712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:15:20,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:15:20,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:15:20,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709587022] [2023-08-30 21:15:20,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:15:20,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:15:20,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:15:20,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:15:20,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 137 [2023-08-30 21:15:20,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 21:15:20,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:20,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 137 [2023-08-30 21:15:20,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:20,422 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2023-08-30 21:15:20,423 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-30 21:15:20,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 161 events. 86/161 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 484 event pairs, 33 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 89. Up to 93 conditions per place. [2023-08-30 21:15:20,426 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2023-08-30 21:15:20,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 197 flow [2023-08-30 21:15:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:15:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:15:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 327 transitions. [2023-08-30 21:15:20,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47737226277372263 [2023-08-30 21:15:20,432 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 327 transitions. [2023-08-30 21:15:20,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 327 transitions. [2023-08-30 21:15:20,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:20,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 327 transitions. [2023-08-30 21:15:20,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 21:15:20,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 21:15:20,441 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 21:15:20,441 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 5 states and 327 transitions. [2023-08-30 21:15:20,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 197 flow [2023-08-30 21:15:20,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 183 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 21:15:20,443 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 64 flow [2023-08-30 21:15:20,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-30 21:15:20,444 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-30 21:15:20,444 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 64 flow [2023-08-30 21:15:20,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 21:15:20,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:20,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:20,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:15:20,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:20,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:20,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1659358149, now seen corresponding path program 2 times [2023-08-30 21:15:20,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:20,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298667758] [2023-08-30 21:15:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:20,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:20,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298667758] [2023-08-30 21:15:20,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298667758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:20,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896990594] [2023-08-30 21:15:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:15:20,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:20,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:20,565 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 21:15:20,607 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 21:15:20,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 21:15:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:20,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 21:15:20,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:20,734 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 21:15:20,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 21:15:20,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896990594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:15:20,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 21:15:20,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 21:15:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849744013] [2023-08-30 21:15:20,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:15:20,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:15:20,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:20,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:15:20,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:15:20,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2023-08-30 21:15:20,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 21:15:20,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:20,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2023-08-30 21:15:20,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:20,808 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-08-30 21:15:20,809 INFO L131 PetriNetUnfolder]: For 52/59 co-relation queries the response was YES. [2023-08-30 21:15:20,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 94 events. 51/94 cut-off events. For 52/59 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 24 based on Foata normal form. 15/89 useless extension candidates. Maximal degree in co-relation 133. Up to 73 conditions per place. [2023-08-30 21:15:20,810 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-30 21:15:20,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 121 flow [2023-08-30 21:15:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:15:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:15:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 261 transitions. [2023-08-30 21:15:20,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762773722627737 [2023-08-30 21:15:20,812 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 261 transitions. [2023-08-30 21:15:20,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 261 transitions. [2023-08-30 21:15:20,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:20,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 261 transitions. [2023-08-30 21:15:20,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 21:15:20,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 21:15:20,822 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 21:15:20,823 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 64 flow. Second operand 4 states and 261 transitions. [2023-08-30 21:15:20,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 121 flow [2023-08-30 21:15:20,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 21:15:20,824 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-08-30 21:15:20,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-30 21:15:20,825 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-30 21:15:20,825 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-08-30 21:15:20,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 21:15:20,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:20,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:20,844 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 21:15:21,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:21,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:21,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash 479227940, now seen corresponding path program 1 times [2023-08-30 21:15:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:21,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995001418] [2023-08-30 21:15:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:15:21,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:21,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995001418] [2023-08-30 21:15:21,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995001418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:21,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136468813] [2023-08-30 21:15:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:21,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:21,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:21,153 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 21:15:21,185 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 21:15:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:15:21,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:15:21,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:21,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136468813] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:21,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:15:21,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2023-08-30 21:15:21,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714582140] [2023-08-30 21:15:21,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:15:21,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:15:21,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:15:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:15:21,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-08-30 21:15:21,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 21:15:21,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:21,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-08-30 21:15:21,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:21,523 INFO L130 PetriNetUnfolder]: 84/156 cut-off events. [2023-08-30 21:15:21,523 INFO L131 PetriNetUnfolder]: For 28/47 co-relation queries the response was YES. [2023-08-30 21:15:21,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 156 events. 84/156 cut-off events. For 28/47 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 486 event pairs, 6 based on Foata normal form. 20/135 useless extension candidates. Maximal degree in co-relation 147. Up to 61 conditions per place. [2023-08-30 21:15:21,525 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-08-30 21:15:21,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 200 flow [2023-08-30 21:15:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:15:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:15:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-08-30 21:15:21,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531021897810219 [2023-08-30 21:15:21,526 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-08-30 21:15:21,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-08-30 21:15:21,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:21,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-08-30 21:15:21,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 21:15:21,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 21:15:21,530 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 21:15:21,530 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 291 transitions. [2023-08-30 21:15:21,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 200 flow [2023-08-30 21:15:21,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 21:15:21,532 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-08-30 21:15:21,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-30 21:15:21,533 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-30 21:15:21,533 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-08-30 21:15:21,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 21:15:21,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:21,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:21,542 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 21:15:21,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 21:15:21,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:21,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1994220820, now seen corresponding path program 2 times [2023-08-30 21:15:21,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:21,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648373832] [2023-08-30 21:15:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:21,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:15:21,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:21,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648373832] [2023-08-30 21:15:21,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648373832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:21,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415828403] [2023-08-30 21:15:21,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:15:21,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:21,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:21,794 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 21:15:21,796 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 21:15:21,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:15:21,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:15:21,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:15:21,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:15:22,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415828403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:22,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:22,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2023-08-30 21:15:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307618018] [2023-08-30 21:15:22,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:22,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 21:15:22,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:22,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 21:15:22,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-30 21:15:22,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2023-08-30 21:15:22,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 62.111111111111114) internal successors, (559), 9 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 21:15:22,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:22,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2023-08-30 21:15:22,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:22,195 INFO L130 PetriNetUnfolder]: 132/239 cut-off events. [2023-08-30 21:15:22,195 INFO L131 PetriNetUnfolder]: For 231/243 co-relation queries the response was YES. [2023-08-30 21:15:22,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 239 events. 132/239 cut-off events. For 231/243 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 757 event pairs, 32 based on Foata normal form. 26/264 useless extension candidates. Maximal degree in co-relation 232. Up to 190 conditions per place. [2023-08-30 21:15:22,199 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-08-30 21:15:22,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 247 flow [2023-08-30 21:15:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:15:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:15:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2023-08-30 21:15:22,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744525547445255 [2023-08-30 21:15:22,201 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2023-08-30 21:15:22,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2023-08-30 21:15:22,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:22,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2023-08-30 21:15:22,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 21:15:22,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 21:15:22,205 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 21:15:22,205 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 325 transitions. [2023-08-30 21:15:22,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 247 flow [2023-08-30 21:15:22,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 21:15:22,207 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2023-08-30 21:15:22,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-30 21:15:22,208 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-08-30 21:15:22,208 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2023-08-30 21:15:22,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 62.111111111111114) internal successors, (559), 9 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 21:15:22,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:22,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:22,217 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 21:15:22,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:22,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:22,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash 157752969, now seen corresponding path program 3 times [2023-08-30 21:15:22,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:22,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092939737] [2023-08-30 21:15:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:22,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:22,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092939737] [2023-08-30 21:15:22,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092939737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:22,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536891389] [2023-08-30 21:15:22,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:15:22,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:22,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:22,538 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 21:15:22,565 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 21:15:22,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:15:22,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:22,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:15:22,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:22,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:22,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536891389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:22,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:22,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 21:15:22,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575260957] [2023-08-30 21:15:22,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:22,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:15:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:22,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:15:22,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-30 21:15:22,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:22,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 16 states, 16 states have (on average 57.4375) internal successors, (919), 16 states have internal predecessors, (919), 0 states have call successors, (0), 0 states 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 21:15:22,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:22,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:22,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:23,312 INFO L130 PetriNetUnfolder]: 216/388 cut-off events. [2023-08-30 21:15:23,312 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2023-08-30 21:15:23,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 388 events. 216/388 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1459 event pairs, 4 based on Foata normal form. 12/400 useless extension candidates. Maximal degree in co-relation 775. Up to 135 conditions per place. [2023-08-30 21:15:23,315 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 64 selfloop transitions, 29 changer transitions 10/103 dead transitions. [2023-08-30 21:15:23,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 103 transitions, 687 flow [2023-08-30 21:15:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 21:15:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 21:15:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 977 transitions. [2023-08-30 21:15:23,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44571167883211676 [2023-08-30 21:15:23,319 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 977 transitions. [2023-08-30 21:15:23,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 977 transitions. [2023-08-30 21:15:23,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:23,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 977 transitions. [2023-08-30 21:15:23,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 61.0625) internal successors, (977), 16 states have internal predecessors, (977), 0 states have call successors, (0), 0 states 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 21:15:23,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 137.0) internal successors, (2329), 17 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states 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 21:15:23,339 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 137.0) internal successors, (2329), 17 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states 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 21:15:23,339 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 16 states and 977 transitions. [2023-08-30 21:15:23,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 103 transitions, 687 flow [2023-08-30 21:15:23,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 103 transitions, 677 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 21:15:23,343 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 380 flow [2023-08-30 21:15:23,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=380, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-30 21:15:23,344 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-30 21:15:23,344 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 380 flow [2023-08-30 21:15:23,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.4375) internal successors, (919), 16 states have internal predecessors, (919), 0 states have call successors, (0), 0 states 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 21:15:23,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:23,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:23,354 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 21:15:23,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:23,552 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:23,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:23,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1226601811, now seen corresponding path program 4 times [2023-08-30 21:15:23,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:23,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364094676] [2023-08-30 21:15:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:23,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:23,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:23,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364094676] [2023-08-30 21:15:23,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364094676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:23,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193825929] [2023-08-30 21:15:23,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:15:23,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:23,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:23,658 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 21:15:23,677 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 21:15:23,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:15:23,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:23,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:15:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:23,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:23,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193825929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:23,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:23,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 21:15:23,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364313340] [2023-08-30 21:15:23,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:23,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 21:15:23,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 21:15:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-30 21:15:23,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:23,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 380 flow. Second operand has 15 states, 15 states have (on average 57.4) internal successors, (861), 15 states have internal predecessors, (861), 0 states have call successors, (0), 0 states 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 21:15:23,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:23,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:23,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:24,312 INFO L130 PetriNetUnfolder]: 297/535 cut-off events. [2023-08-30 21:15:24,312 INFO L131 PetriNetUnfolder]: For 2550/2550 co-relation queries the response was YES. [2023-08-30 21:15:24,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 535 events. 297/535 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2218 event pairs, 21 based on Foata normal form. 38/573 useless extension candidates. Maximal degree in co-relation 1688. Up to 290 conditions per place. [2023-08-30 21:15:24,316 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 78 selfloop transitions, 40 changer transitions 1/119 dead transitions. [2023-08-30 21:15:24,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 119 transitions, 1099 flow [2023-08-30 21:15:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:15:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:15:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2023-08-30 21:15:24,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44053241734650067 [2023-08-30 21:15:24,320 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2023-08-30 21:15:24,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2023-08-30 21:15:24,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:24,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2023-08-30 21:15:24,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 21:15:24,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 137.0) internal successors, (2466), 18 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 21:15:24,327 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 137.0) internal successors, (2466), 18 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 21:15:24,327 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 380 flow. Second operand 17 states and 1026 transitions. [2023-08-30 21:15:24,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 119 transitions, 1099 flow [2023-08-30 21:15:24,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 119 transitions, 994 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-08-30 21:15:24,336 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 683 flow [2023-08-30 21:15:24,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=683, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-08-30 21:15:24,337 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2023-08-30 21:15:24,337 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 683 flow [2023-08-30 21:15:24,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.4) internal successors, (861), 15 states have internal predecessors, (861), 0 states have call successors, (0), 0 states 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 21:15:24,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:24,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:24,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 21:15:24,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:24,543 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:24,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:24,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1808193385, now seen corresponding path program 5 times [2023-08-30 21:15:24,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:24,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421366232] [2023-08-30 21:15:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:24,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:24,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:24,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421366232] [2023-08-30 21:15:24,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421366232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:24,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181465386] [2023-08-30 21:15:24,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:15:24,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:24,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:24,667 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 21:15:24,679 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 21:15:24,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:15:24,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:24,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 21:15:24,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:24,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:24,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181465386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:24,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:24,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-08-30 21:15:24,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821597690] [2023-08-30 21:15:24,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:24,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 21:15:24,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:24,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 21:15:24,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 21:15:24,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-08-30 21:15:24,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 683 flow. Second operand has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states 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 21:15:24,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:24,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-08-30 21:15:24,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:25,143 INFO L130 PetriNetUnfolder]: 395/719 cut-off events. [2023-08-30 21:15:25,143 INFO L131 PetriNetUnfolder]: For 5748/5772 co-relation queries the response was YES. [2023-08-30 21:15:25,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 719 events. 395/719 cut-off events. For 5748/5772 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3385 event pairs, 44 based on Foata normal form. 13/722 useless extension candidates. Maximal degree in co-relation 3028. Up to 352 conditions per place. [2023-08-30 21:15:25,150 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 71 selfloop transitions, 32 changer transitions 7/117 dead transitions. [2023-08-30 21:15:25,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1313 flow [2023-08-30 21:15:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:15:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:15:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 366 transitions. [2023-08-30 21:15:25,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343065693430656 [2023-08-30 21:15:25,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 366 transitions. [2023-08-30 21:15:25,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 366 transitions. [2023-08-30 21:15:25,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:25,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 366 transitions. [2023-08-30 21:15:25,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 21:15:25,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 21:15:25,154 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 21:15:25,154 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 683 flow. Second operand 5 states and 366 transitions. [2023-08-30 21:15:25,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1313 flow [2023-08-30 21:15:25,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 1160 flow, removed 72 selfloop flow, removed 3 redundant places. [2023-08-30 21:15:25,171 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 908 flow [2023-08-30 21:15:25,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2023-08-30 21:15:25,172 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-08-30 21:15:25,172 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 908 flow [2023-08-30 21:15:25,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states 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 21:15:25,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:25,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:25,184 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 21:15:25,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:25,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:25,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2130618993, now seen corresponding path program 6 times [2023-08-30 21:15:25,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:25,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567264052] [2023-08-30 21:15:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:25,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:25,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:25,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567264052] [2023-08-30 21:15:25,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567264052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:25,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950072322] [2023-08-30 21:15:25,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:15:25,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:25,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:25,474 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 21:15:25,497 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 21:15:25,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:15:25,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:25,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 21:15:25,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:25,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:25,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950072322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:25,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:25,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 21:15:25,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46007407] [2023-08-30 21:15:25,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:25,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:15:25,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:25,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:15:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 21:15:25,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:25,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 908 flow. Second operand has 16 states, 16 states have (on average 57.1875) internal successors, (915), 16 states have internal predecessors, (915), 0 states have call successors, (0), 0 states 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 21:15:25,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:25,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:25,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:26,429 INFO L130 PetriNetUnfolder]: 687/1287 cut-off events. [2023-08-30 21:15:26,429 INFO L131 PetriNetUnfolder]: For 13096/13096 co-relation queries the response was YES. [2023-08-30 21:15:26,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 1287 events. 687/1287 cut-off events. For 13096/13096 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7134 event pairs, 10 based on Foata normal form. 24/1311 useless extension candidates. Maximal degree in co-relation 5227. Up to 385 conditions per place. [2023-08-30 21:15:26,440 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 106 selfloop transitions, 137 changer transitions 16/259 dead transitions. [2023-08-30 21:15:26,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 259 transitions, 3265 flow [2023-08-30 21:15:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 21:15:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 21:15:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1500 transitions. [2023-08-30 21:15:26,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43795620437956206 [2023-08-30 21:15:26,445 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1500 transitions. [2023-08-30 21:15:26,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1500 transitions. [2023-08-30 21:15:26,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:26,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1500 transitions. [2023-08-30 21:15:26,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 60.0) internal successors, (1500), 25 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 21:15:26,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 137.0) internal successors, (3562), 26 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 21:15:26,457 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 137.0) internal successors, (3562), 26 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 21:15:26,457 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 908 flow. Second operand 25 states and 1500 transitions. [2023-08-30 21:15:26,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 259 transitions, 3265 flow [2023-08-30 21:15:26,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 259 transitions, 3233 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-30 21:15:26,513 INFO L231 Difference]: Finished difference. Result has 108 places, 171 transitions, 2489 flow [2023-08-30 21:15:26,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2489, PETRI_PLACES=108, PETRI_TRANSITIONS=171} [2023-08-30 21:15:26,514 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-08-30 21:15:26,514 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 171 transitions, 2489 flow [2023-08-30 21:15:26,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.1875) internal successors, (915), 16 states have internal predecessors, (915), 0 states have call successors, (0), 0 states 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 21:15:26,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:26,515 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:26,529 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 21:15:26,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:26,730 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:26,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:26,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1283699093, now seen corresponding path program 7 times [2023-08-30 21:15:26,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:26,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795611329] [2023-08-30 21:15:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:26,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:26,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795611329] [2023-08-30 21:15:26,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795611329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:26,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616423910] [2023-08-30 21:15:26,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:15:26,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:26,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:26,821 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 21:15:26,831 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 21:15:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:26,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 21:15:26,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:26,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:27,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616423910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:27,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:27,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 21:15:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538848580] [2023-08-30 21:15:27,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:27,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:15:27,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:15:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-08-30 21:15:27,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:27,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 171 transitions, 2489 flow. Second operand has 16 states, 16 states have (on average 57.4375) internal successors, (919), 16 states have internal predecessors, (919), 0 states have call successors, (0), 0 states 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 21:15:27,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:27,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:27,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:27,748 INFO L130 PetriNetUnfolder]: 599/1177 cut-off events. [2023-08-30 21:15:27,749 INFO L131 PetriNetUnfolder]: For 25200/25200 co-relation queries the response was YES. [2023-08-30 21:15:27,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1177 events. 599/1177 cut-off events. For 25200/25200 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6786 event pairs, 37 based on Foata normal form. 56/1233 useless extension candidates. Maximal degree in co-relation 8462. Up to 334 conditions per place. [2023-08-30 21:15:27,762 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 101 selfloop transitions, 130 changer transitions 10/241 dead transitions. [2023-08-30 21:15:27,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 241 transitions, 3509 flow [2023-08-30 21:15:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 21:15:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 21:15:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1328 transitions. [2023-08-30 21:15:27,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44061048440610484 [2023-08-30 21:15:27,766 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1328 transitions. [2023-08-30 21:15:27,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1328 transitions. [2023-08-30 21:15:27,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:27,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1328 transitions. [2023-08-30 21:15:27,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 60.36363636363637) internal successors, (1328), 22 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states 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 21:15:27,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 137.0) internal successors, (3151), 23 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states 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 21:15:27,775 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 137.0) internal successors, (3151), 23 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states 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 21:15:27,775 INFO L175 Difference]: Start difference. First operand has 108 places, 171 transitions, 2489 flow. Second operand 22 states and 1328 transitions. [2023-08-30 21:15:27,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 241 transitions, 3509 flow [2023-08-30 21:15:27,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 241 transitions, 3109 flow, removed 194 selfloop flow, removed 5 redundant places. [2023-08-30 21:15:27,853 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 2457 flow [2023-08-30 21:15:27,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2457, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2023-08-30 21:15:27,854 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2023-08-30 21:15:27,854 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 2457 flow [2023-08-30 21:15:27,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.4375) internal successors, (919), 16 states have internal predecessors, (919), 0 states have call successors, (0), 0 states 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 21:15:27,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:27,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:27,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:28,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 21:15:28,060 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:28,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash 465738203, now seen corresponding path program 8 times [2023-08-30 21:15:28,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:28,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549734230] [2023-08-30 21:15:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:28,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:28,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:28,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549734230] [2023-08-30 21:15:28,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549734230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:28,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669125459] [2023-08-30 21:15:28,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:15:28,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:28,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:28,189 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:28,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:15:28,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:15:28,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:28,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:15:28,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:28,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669125459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:28,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:28,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 21:15:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492125307] [2023-08-30 21:15:28,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:28,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:15:28,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:28,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:15:28,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:15:28,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:28,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 2457 flow. Second operand has 18 states, 18 states have (on average 57.388888888888886) internal successors, (1033), 18 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 21:15:28,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:28,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:28,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:29,152 INFO L130 PetriNetUnfolder]: 764/1554 cut-off events. [2023-08-30 21:15:29,152 INFO L131 PetriNetUnfolder]: For 41948/41948 co-relation queries the response was YES. [2023-08-30 21:15:29,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11238 conditions, 1554 events. 764/1554 cut-off events. For 41948/41948 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9726 event pairs, 119 based on Foata normal form. 96/1650 useless extension candidates. Maximal degree in co-relation 9527. Up to 969 conditions per place. [2023-08-30 21:15:29,167 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 189 selfloop transitions, 87 changer transitions 8/284 dead transitions. [2023-08-30 21:15:29,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 284 transitions, 4327 flow [2023-08-30 21:15:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 21:15:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 21:15:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1215 transitions. [2023-08-30 21:15:29,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44343065693430656 [2023-08-30 21:15:29,173 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1215 transitions. [2023-08-30 21:15:29,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1215 transitions. [2023-08-30 21:15:29,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:29,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1215 transitions. [2023-08-30 21:15:29,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 60.75) internal successors, (1215), 20 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states 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 21:15:29,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states 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 21:15:29,180 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states 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 21:15:29,181 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 2457 flow. Second operand 20 states and 1215 transitions. [2023-08-30 21:15:29,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 284 transitions, 4327 flow [2023-08-30 21:15:29,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 284 transitions, 4218 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-30 21:15:29,284 INFO L231 Difference]: Finished difference. Result has 140 places, 210 transitions, 3396 flow [2023-08-30 21:15:29,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3396, PETRI_PLACES=140, PETRI_TRANSITIONS=210} [2023-08-30 21:15:29,286 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 120 predicate places. [2023-08-30 21:15:29,287 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 210 transitions, 3396 flow [2023-08-30 21:15:29,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.388888888888886) internal successors, (1033), 18 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 21:15:29,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:29,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:29,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:29,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:29,497 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:29,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:29,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2109457573, now seen corresponding path program 9 times [2023-08-30 21:15:29,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:29,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513131561] [2023-08-30 21:15:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:29,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:29,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513131561] [2023-08-30 21:15:29,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513131561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651416243] [2023-08-30 21:15:29,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:15:29,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:29,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:29,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:29,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:15:29,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:15:29,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 21:15:29,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:29,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651416243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:29,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:29,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-30 21:15:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894427865] [2023-08-30 21:15:29,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:29,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:15:29,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:15:29,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 21:15:29,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:29,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 210 transitions, 3396 flow. Second operand has 16 states, 16 states have (on average 57.25) internal successors, (916), 16 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 21:15:29,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:29,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:29,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:30,461 INFO L130 PetriNetUnfolder]: 756/1536 cut-off events. [2023-08-30 21:15:30,461 INFO L131 PetriNetUnfolder]: For 43638/43638 co-relation queries the response was YES. [2023-08-30 21:15:30,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 1536 events. 756/1536 cut-off events. For 43638/43638 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9681 event pairs, 25 based on Foata normal form. 8/1544 useless extension candidates. Maximal degree in co-relation 10773. Up to 468 conditions per place. [2023-08-30 21:15:30,479 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 153 selfloop transitions, 120 changer transitions 9/282 dead transitions. [2023-08-30 21:15:30,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 282 transitions, 4856 flow [2023-08-30 21:15:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 21:15:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 21:15:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1195 transitions. [2023-08-30 21:15:30,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43613138686131386 [2023-08-30 21:15:30,482 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1195 transitions. [2023-08-30 21:15:30,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1195 transitions. [2023-08-30 21:15:30,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:30,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1195 transitions. [2023-08-30 21:15:30,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.75) internal successors, (1195), 20 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states 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 21:15:30,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states 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 21:15:30,488 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states 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 21:15:30,489 INFO L175 Difference]: Start difference. First operand has 140 places, 210 transitions, 3396 flow. Second operand 20 states and 1195 transitions. [2023-08-30 21:15:30,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 282 transitions, 4856 flow [2023-08-30 21:15:30,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 282 transitions, 4488 flow, removed 152 selfloop flow, removed 10 redundant places. [2023-08-30 21:15:30,621 INFO L231 Difference]: Finished difference. Result has 153 places, 224 transitions, 3656 flow [2023-08-30 21:15:30,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3656, PETRI_PLACES=153, PETRI_TRANSITIONS=224} [2023-08-30 21:15:30,622 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-08-30 21:15:30,622 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 224 transitions, 3656 flow [2023-08-30 21:15:30,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.25) internal successors, (916), 16 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 21:15:30,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:30,623 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:30,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:30,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 21:15:30,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:30,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1117413703, now seen corresponding path program 10 times [2023-08-30 21:15:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299579865] [2023-08-30 21:15:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:30,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:30,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299579865] [2023-08-30 21:15:30,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299579865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:30,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161337324] [2023-08-30 21:15:30,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:15:30,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:30,997 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:30,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:15:31,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:15:31,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:31,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:15:31,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:15:31,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:15:31,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161337324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:31,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:31,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-08-30 21:15:31,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393110656] [2023-08-30 21:15:31,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:31,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:15:31,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:31,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:15:31,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-30 21:15:31,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:31,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 224 transitions, 3656 flow. Second operand has 14 states, 14 states have (on average 57.642857142857146) internal successors, (807), 14 states have internal predecessors, (807), 0 states have call successors, (0), 0 states 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 21:15:31,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:31,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:31,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:31,882 INFO L130 PetriNetUnfolder]: 803/1611 cut-off events. [2023-08-30 21:15:31,882 INFO L131 PetriNetUnfolder]: For 63986/63986 co-relation queries the response was YES. [2023-08-30 21:15:31,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13527 conditions, 1611 events. 803/1611 cut-off events. For 63986/63986 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10101 event pairs, 33 based on Foata normal form. 46/1657 useless extension candidates. Maximal degree in co-relation 11549. Up to 407 conditions per place. [2023-08-30 21:15:31,901 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 167 selfloop transitions, 136 changer transitions 52/355 dead transitions. [2023-08-30 21:15:31,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 355 transitions, 5940 flow [2023-08-30 21:15:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 21:15:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 21:15:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1800 transitions. [2023-08-30 21:15:31,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43795620437956206 [2023-08-30 21:15:31,911 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1800 transitions. [2023-08-30 21:15:31,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1800 transitions. [2023-08-30 21:15:31,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:31,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1800 transitions. [2023-08-30 21:15:31,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 60.0) internal successors, (1800), 30 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states 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 21:15:31,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 137.0) internal successors, (4247), 31 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states 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 21:15:31,919 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 137.0) internal successors, (4247), 31 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states 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 21:15:31,919 INFO L175 Difference]: Start difference. First operand has 153 places, 224 transitions, 3656 flow. Second operand 30 states and 1800 transitions. [2023-08-30 21:15:31,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 355 transitions, 5940 flow [2023-08-30 21:15:32,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 355 transitions, 5667 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-08-30 21:15:32,047 INFO L231 Difference]: Finished difference. Result has 185 places, 250 transitions, 4313 flow [2023-08-30 21:15:32,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4313, PETRI_PLACES=185, PETRI_TRANSITIONS=250} [2023-08-30 21:15:32,047 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 165 predicate places. [2023-08-30 21:15:32,047 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 250 transitions, 4313 flow [2023-08-30 21:15:32,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 57.642857142857146) internal successors, (807), 14 states have internal predecessors, (807), 0 states have call successors, (0), 0 states 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 21:15:32,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:32,048 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:32,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 21:15:32,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 21:15:32,249 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:32,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:32,249 INFO L85 PathProgramCache]: Analyzing trace with hash 715119095, now seen corresponding path program 11 times [2023-08-30 21:15:32,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:32,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614303422] [2023-08-30 21:15:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:32,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:32,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614303422] [2023-08-30 21:15:32,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614303422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:32,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500732817] [2023-08-30 21:15:32,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:15:32,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:32,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:32,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:32,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:15:32,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 21:15:32,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:32,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 21:15:32,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:32,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:32,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500732817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:32,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:32,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-30 21:15:32,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795470154] [2023-08-30 21:15:32,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:32,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 21:15:32,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:32,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 21:15:32,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2023-08-30 21:15:32,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:32,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 250 transitions, 4313 flow. Second operand has 25 states, 25 states have (on average 56.8) internal successors, (1420), 25 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states 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 21:15:32,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:32,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:32,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:34,522 INFO L130 PetriNetUnfolder]: 1235/2432 cut-off events. [2023-08-30 21:15:34,522 INFO L131 PetriNetUnfolder]: For 178071/178071 co-relation queries the response was YES. [2023-08-30 21:15:34,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25740 conditions, 2432 events. 1235/2432 cut-off events. For 178071/178071 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16197 event pairs, 10 based on Foata normal form. 38/2470 useless extension candidates. Maximal degree in co-relation 24794. Up to 639 conditions per place. [2023-08-30 21:15:34,553 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 208 selfloop transitions, 385 changer transitions 17/610 dead transitions. [2023-08-30 21:15:34,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 610 transitions, 11431 flow [2023-08-30 21:15:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 21:15:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 21:15:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3087 transitions. [2023-08-30 21:15:34,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44182052382996995 [2023-08-30 21:15:34,558 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3087 transitions. [2023-08-30 21:15:34,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3087 transitions. [2023-08-30 21:15:34,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:34,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3087 transitions. [2023-08-30 21:15:34,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 60.529411764705884) internal successors, (3087), 51 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states 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 21:15:34,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 137.0) internal successors, (7124), 52 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states 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 21:15:34,571 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 137.0) internal successors, (7124), 52 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states 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 21:15:34,571 INFO L175 Difference]: Start difference. First operand has 185 places, 250 transitions, 4313 flow. Second operand 51 states and 3087 transitions. [2023-08-30 21:15:34,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 610 transitions, 11431 flow [2023-08-30 21:15:34,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 610 transitions, 10906 flow, removed 194 selfloop flow, removed 10 redundant places. [2023-08-30 21:15:34,861 INFO L231 Difference]: Finished difference. Result has 226 places, 442 transitions, 9865 flow [2023-08-30 21:15:34,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9865, PETRI_PLACES=226, PETRI_TRANSITIONS=442} [2023-08-30 21:15:34,862 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-08-30 21:15:34,862 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 442 transitions, 9865 flow [2023-08-30 21:15:34,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.8) internal successors, (1420), 25 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states 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 21:15:34,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:34,863 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:34,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 21:15:35,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 21:15:35,068 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:35,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1058407358, now seen corresponding path program 12 times [2023-08-30 21:15:35,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:35,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982495980] [2023-08-30 21:15:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:35,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:35,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982495980] [2023-08-30 21:15:35,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982495980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:35,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906063249] [2023-08-30 21:15:35,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:15:35,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:35,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:35,205 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:35,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 21:15:35,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:15:35,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 21:15:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:35,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:35,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906063249] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:35,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:35,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2023-08-30 21:15:35,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430802162] [2023-08-30 21:15:35,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:35,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:15:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:35,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:15:35,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:15:35,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-08-30 21:15:35,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 442 transitions, 9865 flow. Second operand has 12 states, 12 states have (on average 66.58333333333333) internal successors, (799), 12 states have internal predecessors, (799), 0 states have call successors, (0), 0 states 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 21:15:35,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:35,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-08-30 21:15:35,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:36,707 INFO L130 PetriNetUnfolder]: 1938/3770 cut-off events. [2023-08-30 21:15:36,708 INFO L131 PetriNetUnfolder]: For 282085/282089 co-relation queries the response was YES. [2023-08-30 21:15:36,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42742 conditions, 3770 events. 1938/3770 cut-off events. For 282085/282089 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 27206 event pairs, 168 based on Foata normal form. 7/3770 useless extension candidates. Maximal degree in co-relation 41840. Up to 1612 conditions per place. [2023-08-30 21:15:36,761 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 442 selfloop transitions, 257 changer transitions 28/736 dead transitions. [2023-08-30 21:15:36,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 736 transitions, 17988 flow [2023-08-30 21:15:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:15:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:15:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 441 transitions. [2023-08-30 21:15:36,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364963503649635 [2023-08-30 21:15:36,763 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 441 transitions. [2023-08-30 21:15:36,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 441 transitions. [2023-08-30 21:15:36,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:36,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 441 transitions. [2023-08-30 21:15:36,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:36,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:36,765 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:36,765 INFO L175 Difference]: Start difference. First operand has 226 places, 442 transitions, 9865 flow. Second operand 6 states and 441 transitions. [2023-08-30 21:15:36,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 736 transitions, 17988 flow [2023-08-30 21:15:38,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 736 transitions, 12584 flow, removed 2614 selfloop flow, removed 3 redundant places. [2023-08-30 21:15:38,865 INFO L231 Difference]: Finished difference. Result has 231 places, 588 transitions, 10758 flow [2023-08-30 21:15:38,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10758, PETRI_PLACES=231, PETRI_TRANSITIONS=588} [2023-08-30 21:15:38,866 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2023-08-30 21:15:38,866 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 588 transitions, 10758 flow [2023-08-30 21:15:38,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.58333333333333) internal successors, (799), 12 states have internal predecessors, (799), 0 states have call successors, (0), 0 states 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 21:15:38,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:38,867 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:38,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:39,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 21:15:39,068 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:39,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1587282354, now seen corresponding path program 13 times [2023-08-30 21:15:39,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:39,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517723658] [2023-08-30 21:15:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:39,211 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 21:15:39,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517723658] [2023-08-30 21:15:39,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517723658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36046297] [2023-08-30 21:15:39,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:15:39,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:39,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:39,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:39,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 21:15:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:15:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:39,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:39,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36046297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:39,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:39,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 21:15:39,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203204330] [2023-08-30 21:15:39,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:39,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:15:39,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:39,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:15:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-08-30 21:15:39,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:39,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 588 transitions, 10758 flow. Second operand has 21 states, 21 states have (on average 57.19047619047619) internal successors, (1201), 21 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states 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 21:15:39,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:39,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:39,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:41,190 INFO L130 PetriNetUnfolder]: 1896/3701 cut-off events. [2023-08-30 21:15:41,190 INFO L131 PetriNetUnfolder]: For 45867/45867 co-relation queries the response was YES. [2023-08-30 21:15:41,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26785 conditions, 3701 events. 1896/3701 cut-off events. For 45867/45867 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 26534 event pairs, 40 based on Foata normal form. 68/3769 useless extension candidates. Maximal degree in co-relation 26290. Up to 1102 conditions per place. [2023-08-30 21:15:41,226 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 217 selfloop transitions, 451 changer transitions 20/688 dead transitions. [2023-08-30 21:15:41,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 688 transitions, 13128 flow [2023-08-30 21:15:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 21:15:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 21:15:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1457 transitions. [2023-08-30 21:15:41,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431265206812652 [2023-08-30 21:15:41,229 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1457 transitions. [2023-08-30 21:15:41,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1457 transitions. [2023-08-30 21:15:41,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:41,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1457 transitions. [2023-08-30 21:15:41,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 60.708333333333336) internal successors, (1457), 24 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states 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 21:15:41,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states 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 21:15:41,235 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states 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 21:15:41,235 INFO L175 Difference]: Start difference. First operand has 231 places, 588 transitions, 10758 flow. Second operand 24 states and 1457 transitions. [2023-08-30 21:15:41,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 688 transitions, 13128 flow [2023-08-30 21:15:41,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 688 transitions, 12939 flow, removed 90 selfloop flow, removed 2 redundant places. [2023-08-30 21:15:41,646 INFO L231 Difference]: Finished difference. Result has 248 places, 592 transitions, 11738 flow [2023-08-30 21:15:41,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=10528, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11738, PETRI_PLACES=248, PETRI_TRANSITIONS=592} [2023-08-30 21:15:41,647 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-08-30 21:15:41,647 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 592 transitions, 11738 flow [2023-08-30 21:15:41,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.19047619047619) internal successors, (1201), 21 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states 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 21:15:41,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:41,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:41,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:41,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:41,853 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:41,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1502044534, now seen corresponding path program 14 times [2023-08-30 21:15:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:41,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642462630] [2023-08-30 21:15:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:41,998 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 21:15:41,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:41,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642462630] [2023-08-30 21:15:41,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642462630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:41,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251663252] [2023-08-30 21:15:41,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:15:41,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:42,001 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:42,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 21:15:42,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:15:42,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:42,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:15:42,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:42,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:42,468 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 21:15:42,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251663252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:42,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:42,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 21:15:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028011995] [2023-08-30 21:15:42,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:42,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:15:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:15:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:15:42,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:42,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 592 transitions, 11738 flow. Second operand has 22 states, 22 states have (on average 57.18181818181818) internal successors, (1258), 22 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 21:15:42,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:42,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:42,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:43,962 INFO L130 PetriNetUnfolder]: 2183/4264 cut-off events. [2023-08-30 21:15:43,962 INFO L131 PetriNetUnfolder]: For 58092/58092 co-relation queries the response was YES. [2023-08-30 21:15:43,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31312 conditions, 4264 events. 2183/4264 cut-off events. For 58092/58092 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31626 event pairs, 51 based on Foata normal form. 104/4368 useless extension candidates. Maximal degree in co-relation 30827. Up to 1652 conditions per place. [2023-08-30 21:15:44,010 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 285 selfloop transitions, 513 changer transitions 4/802 dead transitions. [2023-08-30 21:15:44,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 802 transitions, 16001 flow [2023-08-30 21:15:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 21:15:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 21:15:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1575 transitions. [2023-08-30 21:15:44,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421673217293655 [2023-08-30 21:15:44,014 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1575 transitions. [2023-08-30 21:15:44,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1575 transitions. [2023-08-30 21:15:44,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:44,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1575 transitions. [2023-08-30 21:15:44,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.57692307692308) internal successors, (1575), 26 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states 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 21:15:44,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 137.0) internal successors, (3699), 27 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states 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 21:15:44,021 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 137.0) internal successors, (3699), 27 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states 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 21:15:44,021 INFO L175 Difference]: Start difference. First operand has 248 places, 592 transitions, 11738 flow. Second operand 26 states and 1575 transitions. [2023-08-30 21:15:44,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 802 transitions, 16001 flow [2023-08-30 21:15:44,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 802 transitions, 15806 flow, removed 21 selfloop flow, removed 14 redundant places. [2023-08-30 21:15:44,580 INFO L231 Difference]: Finished difference. Result has 270 places, 680 transitions, 14937 flow [2023-08-30 21:15:44,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=11572, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14937, PETRI_PLACES=270, PETRI_TRANSITIONS=680} [2023-08-30 21:15:44,580 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-08-30 21:15:44,581 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 680 transitions, 14937 flow [2023-08-30 21:15:44,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.18181818181818) internal successors, (1258), 22 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 21:15:44,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:44,581 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:44,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:44,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 21:15:44,786 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:44,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:44,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2011961230, now seen corresponding path program 15 times [2023-08-30 21:15:44,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:44,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600034009] [2023-08-30 21:15:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:44,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:44,923 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 21:15:44,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:44,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600034009] [2023-08-30 21:15:44,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600034009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:44,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145370450] [2023-08-30 21:15:44,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:15:44,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:44,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:44,926 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:44,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 21:15:44,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:15:44,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:44,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:15:44,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:45,105 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 21:15:45,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:45,263 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 21:15:45,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145370450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:45,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:45,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 21:15:45,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483446752] [2023-08-30 21:15:45,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:45,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:15:45,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:15:45,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:15:45,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:45,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 680 transitions, 14937 flow. Second operand has 22 states, 22 states have (on average 57.18181818181818) internal successors, (1258), 22 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 21:15:45,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:45,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:45,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:47,164 INFO L130 PetriNetUnfolder]: 2307/4500 cut-off events. [2023-08-30 21:15:47,164 INFO L131 PetriNetUnfolder]: For 80936/80936 co-relation queries the response was YES. [2023-08-30 21:15:47,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36057 conditions, 4500 events. 2307/4500 cut-off events. For 80936/80936 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 33669 event pairs, 7 based on Foata normal form. 76/4576 useless extension candidates. Maximal degree in co-relation 35504. Up to 905 conditions per place. [2023-08-30 21:15:47,210 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 276 selfloop transitions, 604 changer transitions 11/891 dead transitions. [2023-08-30 21:15:47,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 891 transitions, 19573 flow [2023-08-30 21:15:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:15:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:15:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1929 transitions. [2023-08-30 21:15:47,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44000912408759124 [2023-08-30 21:15:47,214 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1929 transitions. [2023-08-30 21:15:47,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1929 transitions. [2023-08-30 21:15:47,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:47,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1929 transitions. [2023-08-30 21:15:47,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 60.28125) internal successors, (1929), 32 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states 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 21:15:47,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states 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 21:15:47,222 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states 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 21:15:47,222 INFO L175 Difference]: Start difference. First operand has 270 places, 680 transitions, 14937 flow. Second operand 32 states and 1929 transitions. [2023-08-30 21:15:47,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 891 transitions, 19573 flow [2023-08-30 21:15:48,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 891 transitions, 19349 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-08-30 21:15:48,087 INFO L231 Difference]: Finished difference. Result has 296 places, 754 transitions, 17585 flow [2023-08-30 21:15:48,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=14731, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17585, PETRI_PLACES=296, PETRI_TRANSITIONS=754} [2023-08-30 21:15:48,088 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-08-30 21:15:48,088 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 754 transitions, 17585 flow [2023-08-30 21:15:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.18181818181818) internal successors, (1258), 22 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 21:15:48,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:48,089 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:48,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 21:15:48,293 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:48,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash 295045338, now seen corresponding path program 16 times [2023-08-30 21:15:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767085894] [2023-08-30 21:15:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:48,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:48,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767085894] [2023-08-30 21:15:48,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767085894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:48,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321117744] [2023-08-30 21:15:48,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:15:48,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:48,416 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:48,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 21:15:48,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:15:48,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:48,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:15:48,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:48,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:48,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321117744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:48,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:48,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-30 21:15:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039343434] [2023-08-30 21:15:48,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:15:48,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:15:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:15:48,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:48,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 754 transitions, 17585 flow. Second operand has 20 states, 20 states have (on average 56.75) internal successors, (1135), 20 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 21:15:48,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:48,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:48,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:50,844 INFO L130 PetriNetUnfolder]: 2667/5269 cut-off events. [2023-08-30 21:15:50,845 INFO L131 PetriNetUnfolder]: For 105280/105280 co-relation queries the response was YES. [2023-08-30 21:15:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44006 conditions, 5269 events. 2667/5269 cut-off events. For 105280/105280 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 41141 event pairs, 55 based on Foata normal form. 90/5359 useless extension candidates. Maximal degree in co-relation 43434. Up to 1397 conditions per place. [2023-08-30 21:15:50,919 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 462 selfloop transitions, 562 changer transitions 17/1041 dead transitions. [2023-08-30 21:15:50,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1041 transitions, 23867 flow [2023-08-30 21:15:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 21:15:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 21:15:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2295 transitions. [2023-08-30 21:15:50,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44083749519784865 [2023-08-30 21:15:50,924 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2295 transitions. [2023-08-30 21:15:50,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2295 transitions. [2023-08-30 21:15:50,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:50,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2295 transitions. [2023-08-30 21:15:50,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 60.39473684210526) internal successors, (2295), 38 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 21:15:50,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 137.0) internal successors, (5343), 39 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states 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 21:15:50,934 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 137.0) internal successors, (5343), 39 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states 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 21:15:50,934 INFO L175 Difference]: Start difference. First operand has 296 places, 754 transitions, 17585 flow. Second operand 38 states and 2295 transitions. [2023-08-30 21:15:50,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1041 transitions, 23867 flow [2023-08-30 21:15:51,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1041 transitions, 22444 flow, removed 216 selfloop flow, removed 16 redundant places. [2023-08-30 21:15:51,955 INFO L231 Difference]: Finished difference. Result has 325 places, 861 transitions, 20641 flow [2023-08-30 21:15:51,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=16332, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=20641, PETRI_PLACES=325, PETRI_TRANSITIONS=861} [2023-08-30 21:15:51,956 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 305 predicate places. [2023-08-30 21:15:51,956 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 861 transitions, 20641 flow [2023-08-30 21:15:51,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.75) internal successors, (1135), 20 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 21:15:51,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:51,957 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:51,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 21:15:52,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:52,162 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:52,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:52,162 INFO L85 PathProgramCache]: Analyzing trace with hash 344505820, now seen corresponding path program 17 times [2023-08-30 21:15:52,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:52,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939552649] [2023-08-30 21:15:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:52,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:52,304 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 21:15:52,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:52,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939552649] [2023-08-30 21:15:52,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939552649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:52,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102850653] [2023-08-30 21:15:52,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:15:52,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:52,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:52,307 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:52,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 21:15:52,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:15:52,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:52,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:15:52,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:52,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:52,695 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 21:15:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102850653] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:52,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:52,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-30 21:15:52,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353240220] [2023-08-30 21:15:52,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:52,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:15:52,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:15:52,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:15:52,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:52,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 861 transitions, 20641 flow. Second operand has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 21:15:52,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:52,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:52,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:55,039 INFO L130 PetriNetUnfolder]: 3133/6126 cut-off events. [2023-08-30 21:15:55,039 INFO L131 PetriNetUnfolder]: For 134558/134558 co-relation queries the response was YES. [2023-08-30 21:15:55,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52873 conditions, 6126 events. 3133/6126 cut-off events. For 134558/134558 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 48990 event pairs, 79 based on Foata normal form. 56/6182 useless extension candidates. Maximal degree in co-relation 52220. Up to 3060 conditions per place. [2023-08-30 21:15:55,105 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 494 selfloop transitions, 657 changer transitions 15/1166 dead transitions. [2023-08-30 21:15:55,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1166 transitions, 28460 flow [2023-08-30 21:15:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 21:15:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 21:15:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1697 transitions. [2023-08-30 21:15:55,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44238790406673617 [2023-08-30 21:15:55,111 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1697 transitions. [2023-08-30 21:15:55,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1697 transitions. [2023-08-30 21:15:55,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:55,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1697 transitions. [2023-08-30 21:15:55,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 60.607142857142854) internal successors, (1697), 28 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states 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 21:15:55,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states 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 21:15:55,117 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states 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 21:15:55,117 INFO L175 Difference]: Start difference. First operand has 325 places, 861 transitions, 20641 flow. Second operand 28 states and 1697 transitions. [2023-08-30 21:15:55,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1166 transitions, 28460 flow [2023-08-30 21:15:56,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1166 transitions, 27809 flow, removed 143 selfloop flow, removed 25 redundant places. [2023-08-30 21:15:56,395 INFO L231 Difference]: Finished difference. Result has 338 places, 1024 transitions, 26136 flow [2023-08-30 21:15:56,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=20148, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=26136, PETRI_PLACES=338, PETRI_TRANSITIONS=1024} [2023-08-30 21:15:56,396 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-08-30 21:15:56,396 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1024 transitions, 26136 flow [2023-08-30 21:15:56,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 21:15:56,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:56,397 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:56,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:56,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:56,602 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:56,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:56,602 INFO L85 PathProgramCache]: Analyzing trace with hash -764395770, now seen corresponding path program 18 times [2023-08-30 21:15:56,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:56,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604936610] [2023-08-30 21:15:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:56,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:56,742 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 21:15:56,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:56,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604936610] [2023-08-30 21:15:56,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604936610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:56,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211658221] [2023-08-30 21:15:56,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:15:56,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:56,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:56,744 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:56,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 21:15:56,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:15:56,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:56,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:15:56,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:56,927 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 21:15:56,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:57,069 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 21:15:57,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211658221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:57,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:57,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-30 21:15:57,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142602898] [2023-08-30 21:15:57,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:57,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:15:57,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:57,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:15:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:15:57,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:15:57,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1024 transitions, 26136 flow. Second operand has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 21:15:57,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:57,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:15:57,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:16:00,099 INFO L130 PetriNetUnfolder]: 3703/7260 cut-off events. [2023-08-30 21:16:00,099 INFO L131 PetriNetUnfolder]: For 189224/189224 co-relation queries the response was YES. [2023-08-30 21:16:00,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66462 conditions, 7260 events. 3703/7260 cut-off events. For 189224/189224 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59810 event pairs, 105 based on Foata normal form. 168/7428 useless extension candidates. Maximal degree in co-relation 65752. Up to 2424 conditions per place. [2023-08-30 21:16:00,177 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 432 selfloop transitions, 909 changer transitions 20/1361 dead transitions. [2023-08-30 21:16:00,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1361 transitions, 35664 flow [2023-08-30 21:16:00,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 21:16:00,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 21:16:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1871 transitions. [2023-08-30 21:16:00,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44054626795384977 [2023-08-30 21:16:00,179 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1871 transitions. [2023-08-30 21:16:00,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1871 transitions. [2023-08-30 21:16:00,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:16:00,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1871 transitions. [2023-08-30 21:16:00,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 60.354838709677416) internal successors, (1871), 31 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states 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 21:16:00,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 137.0) internal successors, (4384), 32 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states 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 21:16:00,186 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 137.0) internal successors, (4384), 32 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states 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 21:16:00,186 INFO L175 Difference]: Start difference. First operand has 338 places, 1024 transitions, 26136 flow. Second operand 31 states and 1871 transitions. [2023-08-30 21:16:00,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1361 transitions, 35664 flow [2023-08-30 21:16:02,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1361 transitions, 35350 flow, removed 133 selfloop flow, removed 7 redundant places. [2023-08-30 21:16:02,121 INFO L231 Difference]: Finished difference. Result has 369 places, 1213 transitions, 33651 flow [2023-08-30 21:16:02,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=25837, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=33651, PETRI_PLACES=369, PETRI_TRANSITIONS=1213} [2023-08-30 21:16:02,123 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-08-30 21:16:02,123 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1213 transitions, 33651 flow [2023-08-30 21:16:02,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 21:16:02,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:16:02,124 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:16:02,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 21:16:02,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:16:02,329 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:16:02,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:16:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1978622190, now seen corresponding path program 19 times [2023-08-30 21:16:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:16:02,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075526354] [2023-08-30 21:16:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:16:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:16:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:16:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:02,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:16:02,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075526354] [2023-08-30 21:16:02,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075526354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:16:02,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332904739] [2023-08-30 21:16:02,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:16:02,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:16:02,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:16:02,449 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:16:02,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 21:16:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:16:02,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:16:02,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:16:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:02,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:16:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:16:02,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332904739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:16:02,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:16:02,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-30 21:16:02,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545363532] [2023-08-30 21:16:02,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:16:02,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:16:02,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:16:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:16:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:16:02,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:16:02,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1213 transitions, 33651 flow. Second operand has 22 states, 22 states have (on average 56.90909090909091) internal successors, (1252), 22 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 21:16:02,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:16:02,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:16:02,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:16:06,262 INFO L130 PetriNetUnfolder]: 4062/8012 cut-off events. [2023-08-30 21:16:06,263 INFO L131 PetriNetUnfolder]: For 244787/244787 co-relation queries the response was YES. [2023-08-30 21:16:06,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78412 conditions, 8012 events. 4062/8012 cut-off events. For 244787/244787 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 67551 event pairs, 305 based on Foata normal form. 136/8148 useless extension candidates. Maximal degree in co-relation 77443. Up to 6222 conditions per place. [2023-08-30 21:16:06,380 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1169 selfloop transitions, 271 changer transitions 17/1457 dead transitions. [2023-08-30 21:16:06,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1457 transitions, 41399 flow [2023-08-30 21:16:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 21:16:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 21:16:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1696 transitions. [2023-08-30 21:16:06,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421272158498436 [2023-08-30 21:16:06,383 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1696 transitions. [2023-08-30 21:16:06,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1696 transitions. [2023-08-30 21:16:06,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:16:06,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1696 transitions. [2023-08-30 21:16:06,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 60.57142857142857) internal successors, (1696), 28 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:16:06,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states 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 21:16:06,389 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states 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 21:16:06,389 INFO L175 Difference]: Start difference. First operand has 369 places, 1213 transitions, 33651 flow. Second operand 28 states and 1696 transitions. [2023-08-30 21:16:06,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1457 transitions, 41399 flow [2023-08-30 21:16:09,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1457 transitions, 40967 flow, removed 173 selfloop flow, removed 13 redundant places. [2023-08-30 21:16:09,282 INFO L231 Difference]: Finished difference. Result has 393 places, 1327 transitions, 37600 flow [2023-08-30 21:16:09,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=33219, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=37600, PETRI_PLACES=393, PETRI_TRANSITIONS=1327} [2023-08-30 21:16:09,283 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 373 predicate places. [2023-08-30 21:16:09,284 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1327 transitions, 37600 flow [2023-08-30 21:16:09,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.90909090909091) internal successors, (1252), 22 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 21:16:09,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:16:09,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:16:09,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 21:16:09,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 21:16:09,490 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:16:09,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:16:09,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1120342306, now seen corresponding path program 20 times [2023-08-30 21:16:09,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:16:09,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534343713] [2023-08-30 21:16:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:16:09,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:16:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:16:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:09,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:16:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534343713] [2023-08-30 21:16:09,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534343713] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:16:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292912852] [2023-08-30 21:16:09,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:16:09,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:16:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:16:09,617 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:16:09,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 21:16:09,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:16:09,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:16:09,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:16:09,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:16:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:09,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:16:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:09,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292912852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:16:09,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:16:09,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-30 21:16:09,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818541431] [2023-08-30 21:16:09,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:16:09,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:16:09,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:16:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:16:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:16:10,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:16:10,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1327 transitions, 37600 flow. Second operand has 22 states, 22 states have (on average 56.90909090909091) internal successors, (1252), 22 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 21:16:10,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:16:10,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:16:10,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:16:13,704 INFO L130 PetriNetUnfolder]: 3993/7827 cut-off events. [2023-08-30 21:16:13,704 INFO L131 PetriNetUnfolder]: For 248638/248638 co-relation queries the response was YES. [2023-08-30 21:16:13,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77771 conditions, 7827 events. 3993/7827 cut-off events. For 248638/248638 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 65373 event pairs, 49 based on Foata normal form. 18/7845 useless extension candidates. Maximal degree in co-relation 76868. Up to 2303 conditions per place. [2023-08-30 21:16:13,807 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 807 selfloop transitions, 610 changer transitions 15/1432 dead transitions. [2023-08-30 21:16:13,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1432 transitions, 41327 flow [2023-08-30 21:16:13,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 21:16:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 21:16:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1967 transitions. [2023-08-30 21:16:13,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43508073435080735 [2023-08-30 21:16:13,809 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1967 transitions. [2023-08-30 21:16:13,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1967 transitions. [2023-08-30 21:16:13,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:16:13,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1967 transitions. [2023-08-30 21:16:13,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.60606060606061) internal successors, (1967), 33 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states 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 21:16:13,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 137.0) internal successors, (4658), 34 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states 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 21:16:13,815 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 137.0) internal successors, (4658), 34 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states 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 21:16:13,815 INFO L175 Difference]: Start difference. First operand has 393 places, 1327 transitions, 37600 flow. Second operand 33 states and 1967 transitions. [2023-08-30 21:16:13,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1432 transitions, 41327 flow [2023-08-30 21:16:16,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1432 transitions, 40963 flow, removed 111 selfloop flow, removed 15 redundant places. [2023-08-30 21:16:16,777 INFO L231 Difference]: Finished difference. Result has 414 places, 1332 transitions, 38544 flow [2023-08-30 21:16:16,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=36823, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38544, PETRI_PLACES=414, PETRI_TRANSITIONS=1332} [2023-08-30 21:16:16,778 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-08-30 21:16:16,778 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1332 transitions, 38544 flow [2023-08-30 21:16:16,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.90909090909091) internal successors, (1252), 22 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 21:16:16,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:16:16,778 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:16:16,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 21:16:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 21:16:16,979 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:16:16,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:16:16,979 INFO L85 PathProgramCache]: Analyzing trace with hash -198606537, now seen corresponding path program 21 times [2023-08-30 21:16:16,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:16:16,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460374555] [2023-08-30 21:16:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:16:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:16:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:16:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:17,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:16:17,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460374555] [2023-08-30 21:16:17,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460374555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:16:17,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217148485] [2023-08-30 21:16:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:16:17,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:16:17,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:16:17,157 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:16:17,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 21:16:17,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 21:16:17,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:16:17,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 21:16:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:16:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:17,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:16:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:17,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217148485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:16:17,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:16:17,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 21:16:17,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598601278] [2023-08-30 21:16:17,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:16:17,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:16:17,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:16:17,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:16:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:16:17,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:16:17,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1332 transitions, 38544 flow. Second operand has 29 states, 29 states have (on average 56.96551724137931) internal successors, (1652), 29 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 21:16:17,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:16:17,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:16:17,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:16:23,257 INFO L130 PetriNetUnfolder]: 5093/10127 cut-off events. [2023-08-30 21:16:23,257 INFO L131 PetriNetUnfolder]: For 335973/335973 co-relation queries the response was YES. [2023-08-30 21:16:23,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102245 conditions, 10127 events. 5093/10127 cut-off events. For 335973/335973 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 88862 event pairs, 11 based on Foata normal form. 180/10307 useless extension candidates. Maximal degree in co-relation 101503. Up to 2141 conditions per place. [2023-08-30 21:16:23,385 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 509 selfloop transitions, 1452 changer transitions 34/1995 dead transitions. [2023-08-30 21:16:23,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1995 transitions, 55850 flow [2023-08-30 21:16:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-30 21:16:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-30 21:16:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3805 transitions. [2023-08-30 21:16:23,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408527401228131 [2023-08-30 21:16:23,389 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3805 transitions. [2023-08-30 21:16:23,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3805 transitions. [2023-08-30 21:16:23,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:16:23,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3805 transitions. [2023-08-30 21:16:23,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.3968253968254) internal successors, (3805), 63 states have internal predecessors, (3805), 0 states have call successors, (0), 0 states 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 21:16:23,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 137.0) internal successors, (8768), 64 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states 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 21:16:23,402 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 137.0) internal successors, (8768), 64 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states 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 21:16:23,403 INFO L175 Difference]: Start difference. First operand has 414 places, 1332 transitions, 38544 flow. Second operand 63 states and 3805 transitions. [2023-08-30 21:16:23,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1995 transitions, 55850 flow [2023-08-30 21:16:27,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 1995 transitions, 54757 flow, removed 126 selfloop flow, removed 16 redundant places. [2023-08-30 21:16:27,553 INFO L231 Difference]: Finished difference. Result has 472 places, 1687 transitions, 50830 flow [2023-08-30 21:16:27,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=37603, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=50830, PETRI_PLACES=472, PETRI_TRANSITIONS=1687} [2023-08-30 21:16:27,555 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 452 predicate places. [2023-08-30 21:16:27,555 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1687 transitions, 50830 flow [2023-08-30 21:16:27,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.96551724137931) internal successors, (1652), 29 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 21:16:27,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:16:27,555 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:16:27,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 21:16:27,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:16:27,761 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:16:27,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:16:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash 175450710, now seen corresponding path program 22 times [2023-08-30 21:16:27,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:16:27,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281731718] [2023-08-30 21:16:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:16:27,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:16:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:16:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:27,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:16:27,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281731718] [2023-08-30 21:16:27,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281731718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:16:27,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291331074] [2023-08-30 21:16:27,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:16:27,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:16:27,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:16:27,916 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:16:27,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 21:16:27,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:16:27,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:16:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:16:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:16:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:16:28,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:16:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:16:28,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291331074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:16:28,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:16:28,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2023-08-30 21:16:28,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401371931] [2023-08-30 21:16:28,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:16:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 21:16:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:16:28,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 21:16:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-30 21:16:28,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:16:28,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1687 transitions, 50830 flow. Second operand has 17 states, 17 states have (on average 57.35294117647059) internal successors, (975), 17 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 21:16:28,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:16:28,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:16:28,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:16:34,399 INFO L130 PetriNetUnfolder]: 5147/10159 cut-off events. [2023-08-30 21:16:34,399 INFO L131 PetriNetUnfolder]: For 366730/366730 co-relation queries the response was YES. [2023-08-30 21:16:34,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109570 conditions, 10159 events. 5147/10159 cut-off events. For 366730/366730 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 88392 event pairs, 123 based on Foata normal form. 104/10263 useless extension candidates. Maximal degree in co-relation 108420. Up to 2922 conditions per place. [2023-08-30 21:16:34,535 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 966 selfloop transitions, 926 changer transitions 37/1929 dead transitions. [2023-08-30 21:16:34,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1929 transitions, 58875 flow [2023-08-30 21:16:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 21:16:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 21:16:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2408 transitions. [2023-08-30 21:16:34,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394160583941606 [2023-08-30 21:16:34,538 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2408 transitions. [2023-08-30 21:16:34,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2408 transitions. [2023-08-30 21:16:34,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:16:34,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2408 transitions. [2023-08-30 21:16:34,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 60.2) internal successors, (2408), 40 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states 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 21:16:34,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 137.0) internal successors, (5617), 41 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states 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 21:16:34,543 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 137.0) internal successors, (5617), 41 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states 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 21:16:34,543 INFO L175 Difference]: Start difference. First operand has 472 places, 1687 transitions, 50830 flow. Second operand 40 states and 2408 transitions. [2023-08-30 21:16:34,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1929 transitions, 58875 flow [2023-08-30 21:16:38,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1929 transitions, 57886 flow, removed 399 selfloop flow, removed 18 redundant places. [2023-08-30 21:16:38,931 INFO L231 Difference]: Finished difference. Result has 506 places, 1780 transitions, 54982 flow [2023-08-30 21:16:38,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=49860, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=54982, PETRI_PLACES=506, PETRI_TRANSITIONS=1780} [2023-08-30 21:16:38,933 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-08-30 21:16:38,933 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1780 transitions, 54982 flow [2023-08-30 21:16:38,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.35294117647059) internal successors, (975), 17 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 21:16:38,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:16:38,934 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:16:38,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 21:16:39,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:16:39,137 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:16:39,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:16:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash -844978902, now seen corresponding path program 23 times [2023-08-30 21:16:39,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:16:39,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395178360] [2023-08-30 21:16:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:16:39,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:16:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:16:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:39,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:16:39,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395178360] [2023-08-30 21:16:39,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395178360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:16:39,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397480300] [2023-08-30 21:16:39,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:16:39,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:16:39,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:16:39,281 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:16:39,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 21:16:39,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 21:16:39,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:16:39,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 21:16:39,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:16:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:39,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:16:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:39,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397480300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:16:39,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:16:39,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-08-30 21:16:39,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496886355] [2023-08-30 21:16:39,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:16:39,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:16:39,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:16:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:16:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:16:39,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:16:39,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1780 transitions, 54982 flow. Second operand has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 21:16:39,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:16:39,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:16:39,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:16:47,224 INFO L130 PetriNetUnfolder]: 5828/11569 cut-off events. [2023-08-30 21:16:47,224 INFO L131 PetriNetUnfolder]: For 464965/464965 co-relation queries the response was YES. [2023-08-30 21:16:47,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128173 conditions, 11569 events. 5828/11569 cut-off events. For 464965/464965 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 102784 event pairs, 227 based on Foata normal form. 448/12017 useless extension candidates. Maximal degree in co-relation 127749. Up to 3242 conditions per place. [2023-08-30 21:16:47,374 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 750 selfloop transitions, 1405 changer transitions 35/2190 dead transitions. [2023-08-30 21:16:47,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 2190 transitions, 69908 flow [2023-08-30 21:16:47,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:16:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:16:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2106 transitions. [2023-08-30 21:16:47,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392075078206465 [2023-08-30 21:16:47,377 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2106 transitions. [2023-08-30 21:16:47,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2106 transitions. [2023-08-30 21:16:47,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:16:47,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2106 transitions. [2023-08-30 21:16:47,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.17142857142857) internal successors, (2106), 35 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states 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 21:16:47,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 137.0) internal successors, (4932), 36 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states 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 21:16:47,384 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 137.0) internal successors, (4932), 36 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states 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 21:16:47,384 INFO L175 Difference]: Start difference. First operand has 506 places, 1780 transitions, 54982 flow. Second operand 35 states and 2106 transitions. [2023-08-30 21:16:47,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 2190 transitions, 69908 flow [2023-08-30 21:16:53,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 2190 transitions, 67715 flow, removed 249 selfloop flow, removed 13 redundant places. [2023-08-30 21:16:53,139 INFO L231 Difference]: Finished difference. Result has 532 places, 1996 transitions, 65679 flow [2023-08-30 21:16:53,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=53005, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=65679, PETRI_PLACES=532, PETRI_TRANSITIONS=1996} [2023-08-30 21:16:53,140 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 512 predicate places. [2023-08-30 21:16:53,140 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1996 transitions, 65679 flow [2023-08-30 21:16:53,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 21:16:53,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:16:53,141 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:16:53,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 21:16:53,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 21:16:53,341 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:16:53,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:16:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1262507224, now seen corresponding path program 24 times [2023-08-30 21:16:53,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:16:53,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696480204] [2023-08-30 21:16:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:16:53,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:16:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:16:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:53,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:16:53,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696480204] [2023-08-30 21:16:53,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696480204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:16:53,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225783767] [2023-08-30 21:16:53,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:16:53,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:16:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:16:53,481 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:16:53,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 21:16:53,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 21:16:53,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:16:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 21:16:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:16:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:53,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:16:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:16:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225783767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:16:53,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:16:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-30 21:16:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103065529] [2023-08-30 21:16:53,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:16:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 21:16:53,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:16:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 21:16:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-08-30 21:16:53,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:16:53,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1996 transitions, 65679 flow. Second operand has 24 states, 24 states have (on average 56.708333333333336) internal successors, (1361), 24 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states 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 21:16:53,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:16:53,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:16:53,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:17:02,152 INFO L130 PetriNetUnfolder]: 6319/12549 cut-off events. [2023-08-30 21:17:02,152 INFO L131 PetriNetUnfolder]: For 547009/547009 co-relation queries the response was YES. [2023-08-30 21:17:02,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148021 conditions, 12549 events. 6319/12549 cut-off events. For 547009/547009 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 112724 event pairs, 533 based on Foata normal form. 240/12789 useless extension candidates. Maximal degree in co-relation 147322. Up to 9914 conditions per place. [2023-08-30 21:17:02,327 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 1858 selfloop transitions, 433 changer transitions 18/2309 dead transitions. [2023-08-30 21:17:02,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 2309 transitions, 78847 flow [2023-08-30 21:17:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 21:17:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 21:17:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1457 transitions. [2023-08-30 21:17:02,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431265206812652 [2023-08-30 21:17:02,329 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1457 transitions. [2023-08-30 21:17:02,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1457 transitions. [2023-08-30 21:17:02,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:17:02,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1457 transitions. [2023-08-30 21:17:02,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 60.708333333333336) internal successors, (1457), 24 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states 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 21:17:02,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states 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 21:17:02,334 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states 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 21:17:02,334 INFO L175 Difference]: Start difference. First operand has 532 places, 1996 transitions, 65679 flow. Second operand 24 states and 1457 transitions. [2023-08-30 21:17:02,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 2309 transitions, 78847 flow [2023-08-30 21:17:10,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 2309 transitions, 77988 flow, removed 348 selfloop flow, removed 14 redundant places. [2023-08-30 21:17:10,201 INFO L231 Difference]: Finished difference. Result has 552 places, 2179 transitions, 73089 flow [2023-08-30 21:17:10,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=64850, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=73089, PETRI_PLACES=552, PETRI_TRANSITIONS=2179} [2023-08-30 21:17:10,203 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 532 predicate places. [2023-08-30 21:17:10,203 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 2179 transitions, 73089 flow [2023-08-30 21:17:10,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.708333333333336) internal successors, (1361), 24 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states 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 21:17:10,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:17:10,204 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:17:10,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-30 21:17:10,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 21:17:10,404 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:17:10,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:17:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1865710427, now seen corresponding path program 25 times [2023-08-30 21:17:10,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:17:10,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194896602] [2023-08-30 21:17:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:17:10,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:17:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:17:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:10,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:17:10,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194896602] [2023-08-30 21:17:10,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194896602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:17:10,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891618646] [2023-08-30 21:17:10,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:17:10,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:17:10,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:17:10,709 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:17:10,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 21:17:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:17:10,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:17:10,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:17:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:10,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:17:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:11,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891618646] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:17:11,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:17:11,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-30 21:17:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935030075] [2023-08-30 21:17:11,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:17:11,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 21:17:11,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:17:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 21:17:11,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-08-30 21:17:11,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:17:11,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 2179 transitions, 73089 flow. Second operand has 26 states, 26 states have (on average 56.96153846153846) internal successors, (1481), 26 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states 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 21:17:11,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:17:11,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:17:11,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:17:21,714 INFO L130 PetriNetUnfolder]: 7426/14580 cut-off events. [2023-08-30 21:17:21,714 INFO L131 PetriNetUnfolder]: For 646625/646625 co-relation queries the response was YES. [2023-08-30 21:17:21,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175183 conditions, 14580 events. 7426/14580 cut-off events. For 646625/646625 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 132510 event pairs, 104 based on Foata normal form. 66/14646 useless extension candidates. Maximal degree in co-relation 174260. Up to 4042 conditions per place. [2023-08-30 21:17:22,034 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 663 selfloop transitions, 2215 changer transitions 51/2929 dead transitions. [2023-08-30 21:17:22,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 2929 transitions, 98252 flow [2023-08-30 21:17:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 21:17:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 21:17:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2071 transitions. [2023-08-30 21:17:22,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446114212108201 [2023-08-30 21:17:22,036 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2071 transitions. [2023-08-30 21:17:22,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2071 transitions. [2023-08-30 21:17:22,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:17:22,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2071 transitions. [2023-08-30 21:17:22,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 60.911764705882355) internal successors, (2071), 34 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states 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 21:17:22,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states 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 21:17:22,042 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states 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 21:17:22,042 INFO L175 Difference]: Start difference. First operand has 552 places, 2179 transitions, 73089 flow. Second operand 34 states and 2071 transitions. [2023-08-30 21:17:22,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 2929 transitions, 98252 flow [2023-08-30 21:17:32,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2929 transitions, 97725 flow, removed 227 selfloop flow, removed 10 redundant places. [2023-08-30 21:17:32,510 INFO L231 Difference]: Finished difference. Result has 583 places, 2543 transitions, 92010 flow [2023-08-30 21:17:32,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=72614, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1852, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=92010, PETRI_PLACES=583, PETRI_TRANSITIONS=2543} [2023-08-30 21:17:32,512 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 563 predicate places. [2023-08-30 21:17:32,512 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2543 transitions, 92010 flow [2023-08-30 21:17:32,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.96153846153846) internal successors, (1481), 26 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states 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 21:17:32,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:17:32,512 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:17:32,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 21:17:32,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 21:17:32,717 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:17:32,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:17:32,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1412434121, now seen corresponding path program 26 times [2023-08-30 21:17:32,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:17:32,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436575501] [2023-08-30 21:17:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:17:32,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:17:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:17:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:32,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:17:32,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436575501] [2023-08-30 21:17:32,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436575501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:17:32,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104026390] [2023-08-30 21:17:32,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:17:32,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:17:32,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:17:32,858 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:17:32,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 21:17:32,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:17:32,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:17:32,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:17:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:17:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:32,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:17:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:17:33,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104026390] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:17:33,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:17:33,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 13 [2023-08-30 21:17:33,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786207756] [2023-08-30 21:17:33,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:17:33,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 21:17:33,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:17:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 21:17:33,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-30 21:17:33,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-08-30 21:17:33,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2543 transitions, 92010 flow. Second operand has 15 states, 15 states have (on average 66.33333333333333) internal successors, (995), 15 states have internal predecessors, (995), 0 states have call successors, (0), 0 states 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 21:17:33,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:17:33,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-08-30 21:17:33,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:17:49,518 INFO L130 PetriNetUnfolder]: 10420/20394 cut-off events. [2023-08-30 21:17:49,519 INFO L131 PetriNetUnfolder]: For 1021786/1021790 co-relation queries the response was YES. [2023-08-30 21:17:49,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258512 conditions, 20394 events. 10420/20394 cut-off events. For 1021786/1021790 co-relation queries the response was YES. Maximal size of possible extension queue 1486. Compared 194177 event pairs, 705 based on Foata normal form. 6/20393 useless extension candidates. Maximal degree in co-relation 257449. Up to 7919 conditions per place. [2023-08-30 21:17:50,010 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 1798 selfloop transitions, 1910 changer transitions 71/3792 dead transitions. [2023-08-30 21:17:50,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 3792 transitions, 139482 flow [2023-08-30 21:17:50,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:17:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:17:50,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 516 transitions. [2023-08-30 21:17:50,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380604796663191 [2023-08-30 21:17:50,012 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 516 transitions. [2023-08-30 21:17:50,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 516 transitions. [2023-08-30 21:17:50,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:17:50,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 516 transitions. [2023-08-30 21:17:50,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.71428571428571) internal successors, (516), 7 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 21:17:50,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 21:17:50,015 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 21:17:50,015 INFO L175 Difference]: Start difference. First operand has 583 places, 2543 transitions, 92010 flow. Second operand 7 states and 516 transitions. [2023-08-30 21:17:50,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 3792 transitions, 139482 flow [2023-08-30 21:18:10,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 3792 transitions, 136869 flow, removed 1218 selfloop flow, removed 13 redundant places. [2023-08-30 21:18:10,266 INFO L231 Difference]: Finished difference. Result has 581 places, 3366 transitions, 129443 flow [2023-08-30 21:18:10,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=90481, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=129443, PETRI_PLACES=581, PETRI_TRANSITIONS=3366} [2023-08-30 21:18:10,269 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 561 predicate places. [2023-08-30 21:18:10,269 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 3366 transitions, 129443 flow [2023-08-30 21:18:10,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.33333333333333) internal successors, (995), 15 states have internal predecessors, (995), 0 states have call successors, (0), 0 states 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 21:18:10,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:18:10,270 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:18:10,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 21:18:10,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 21:18:10,475 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:18:10,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:18:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1079980299, now seen corresponding path program 27 times [2023-08-30 21:18:10,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:18:10,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25804569] [2023-08-30 21:18:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:18:10,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:18:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:18:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:18:10,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:18:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25804569] [2023-08-30 21:18:10,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25804569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:18:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928417104] [2023-08-30 21:18:10,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:18:10,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:18:10,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:18:10,638 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:18:10,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 21:18:10,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:18:10,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:18:10,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:18:10,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:18:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:18:10,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:18:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:18:11,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928417104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:18:11,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:18:11,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 21:18:11,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510693207] [2023-08-30 21:18:11,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:18:11,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 21:18:11,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:18:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 21:18:11,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-08-30 21:18:11,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:18:11,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 3366 transitions, 129443 flow. Second operand has 27 states, 27 states have (on average 56.96296296296296) internal successors, (1538), 27 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states 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 21:18:11,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:18:11,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:18:11,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:18:36,489 INFO L130 PetriNetUnfolder]: 11506/22564 cut-off events. [2023-08-30 21:18:36,489 INFO L131 PetriNetUnfolder]: For 1238342/1238342 co-relation queries the response was YES. [2023-08-30 21:18:36,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297807 conditions, 22564 events. 11506/22564 cut-off events. For 1238342/1238342 co-relation queries the response was YES. Maximal size of possible extension queue 1724. Compared 218432 event pairs, 7 based on Foata normal form. 172/22736 useless extension candidates. Maximal degree in co-relation 296654. Up to 5155 conditions per place. [2023-08-30 21:18:37,026 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 613 selfloop transitions, 3375 changer transitions 24/4012 dead transitions. [2023-08-30 21:18:37,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 4012 transitions, 156394 flow [2023-08-30 21:18:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 21:18:37,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 21:18:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2845 transitions. [2023-08-30 21:18:37,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44183879484391986 [2023-08-30 21:18:37,030 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2845 transitions. [2023-08-30 21:18:37,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2845 transitions. [2023-08-30 21:18:37,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:18:37,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2845 transitions. [2023-08-30 21:18:37,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 60.53191489361702) internal successors, (2845), 47 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states 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 21:18:37,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 137.0) internal successors, (6576), 48 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states 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 21:18:37,038 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 137.0) internal successors, (6576), 48 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states 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 21:18:37,038 INFO L175 Difference]: Start difference. First operand has 581 places, 3366 transitions, 129443 flow. Second operand 47 states and 2845 transitions. [2023-08-30 21:18:37,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 4012 transitions, 156394 flow [2023-08-30 21:19:04,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 4012 transitions, 155030 flow, removed 649 selfloop flow, removed 2 redundant places. [2023-08-30 21:19:04,466 INFO L231 Difference]: Finished difference. Result has 626 places, 3718 transitions, 148508 flow [2023-08-30 21:19:04,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=128441, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3006, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=148508, PETRI_PLACES=626, PETRI_TRANSITIONS=3718} [2023-08-30 21:19:04,469 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 606 predicate places. [2023-08-30 21:19:04,469 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 3718 transitions, 148508 flow [2023-08-30 21:19:04,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.96296296296296) internal successors, (1538), 27 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states 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 21:19:04,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:19:04,470 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:19:04,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 21:19:04,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:19:04,675 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:19:04,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:19:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash -570063603, now seen corresponding path program 28 times [2023-08-30 21:19:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:19:04,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853124668] [2023-08-30 21:19:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:19:04,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:19:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:19:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:19:04,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:19:04,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853124668] [2023-08-30 21:19:04,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853124668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:19:04,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688009115] [2023-08-30 21:19:04,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:19:04,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:19:04,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:19:04,837 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:19:04,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 21:19:04,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:19:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:19:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 21:19:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:19:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:19:05,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:19:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:19:05,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688009115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:19:05,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:19:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-30 21:19:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103865379] [2023-08-30 21:19:05,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:19:05,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 21:19:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:19:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 21:19:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-08-30 21:19:05,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:19:05,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 3718 transitions, 148508 flow. Second operand has 26 states, 26 states have (on average 56.88461538461539) internal successors, (1479), 26 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:19:05,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:19:05,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:19:05,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:19:36,222 INFO L130 PetriNetUnfolder]: 12790/25146 cut-off events. [2023-08-30 21:19:36,223 INFO L131 PetriNetUnfolder]: For 1462728/1462728 co-relation queries the response was YES. [2023-08-30 21:19:36,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339191 conditions, 25146 events. 12790/25146 cut-off events. For 1462728/1462728 co-relation queries the response was YES. Maximal size of possible extension queue 1901. Compared 247961 event pairs, 257 based on Foata normal form. 278/25424 useless extension candidates. Maximal degree in co-relation 337997. Up to 8557 conditions per place. [2023-08-30 21:19:36,670 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 1887 selfloop transitions, 2564 changer transitions 19/4470 dead transitions. [2023-08-30 21:19:36,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 4470 transitions, 179281 flow [2023-08-30 21:19:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-30 21:19:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-30 21:19:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3547 transitions. [2023-08-30 21:19:36,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43882221947296796 [2023-08-30 21:19:36,673 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3547 transitions. [2023-08-30 21:19:36,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3547 transitions. [2023-08-30 21:19:36,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:19:36,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3547 transitions. [2023-08-30 21:19:36,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 60.11864406779661) internal successors, (3547), 59 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states 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 21:19:36,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 137.0) internal successors, (8220), 60 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states 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 21:19:36,683 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 137.0) internal successors, (8220), 60 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states 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 21:19:36,683 INFO L175 Difference]: Start difference. First operand has 626 places, 3718 transitions, 148508 flow. Second operand 59 states and 3547 transitions. [2023-08-30 21:19:36,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 4470 transitions, 179281 flow [2023-08-30 21:20:06,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 4470 transitions, 177826 flow, removed 292 selfloop flow, removed 17 redundant places. [2023-08-30 21:20:07,102 INFO L231 Difference]: Finished difference. Result has 677 places, 4134 transitions, 170891 flow [2023-08-30 21:20:07,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=147113, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=170891, PETRI_PLACES=677, PETRI_TRANSITIONS=4134} [2023-08-30 21:20:07,105 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 657 predicate places. [2023-08-30 21:20:07,105 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 4134 transitions, 170891 flow [2023-08-30 21:20:07,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.88461538461539) internal successors, (1479), 26 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:20:07,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:20:07,106 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:20:07,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 21:20:07,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:20:07,311 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:20:07,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:20:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2007987801, now seen corresponding path program 29 times [2023-08-30 21:20:07,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:20:07,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914184526] [2023-08-30 21:20:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:20:07,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:20:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:20:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:20:07,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:20:07,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914184526] [2023-08-30 21:20:07,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914184526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:20:07,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646338202] [2023-08-30 21:20:07,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:20:07,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:20:07,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:20:07,561 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:20:07,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 21:20:07,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 21:20:07,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:20:07,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:20:07,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:20:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:20:07,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:20:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:20:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646338202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:20:07,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:20:07,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-30 21:20:07,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964943896] [2023-08-30 21:20:07,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:20:07,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 21:20:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:20:07,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 21:20:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-08-30 21:20:08,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:20:08,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 4134 transitions, 170891 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states 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 21:20:08,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:20:08,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:20:08,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:20:42,731 INFO L130 PetriNetUnfolder]: 13442/26547 cut-off events. [2023-08-30 21:20:42,731 INFO L131 PetriNetUnfolder]: For 1687724/1687724 co-relation queries the response was YES. [2023-08-30 21:20:43,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367912 conditions, 26547 events. 13442/26547 cut-off events. For 1687724/1687724 co-relation queries the response was YES. Maximal size of possible extension queue 2014. Compared 265533 event pairs, 167 based on Foata normal form. 198/26745 useless extension candidates. Maximal degree in co-relation 366717. Up to 6011 conditions per place. [2023-08-30 21:20:43,268 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1338 selfloop transitions, 3366 changer transitions 6/4710 dead transitions. [2023-08-30 21:20:43,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 4710 transitions, 194345 flow [2023-08-30 21:20:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-30 21:20:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-30 21:20:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4384 transitions. [2023-08-30 21:20:43,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383561643835616 [2023-08-30 21:20:43,273 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4384 transitions. [2023-08-30 21:20:43,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4384 transitions. [2023-08-30 21:20:43,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:20:43,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4384 transitions. [2023-08-30 21:20:43,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 60.054794520547944) internal successors, (4384), 73 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states 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 21:20:43,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 137.0) internal successors, (10138), 74 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states 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 21:20:43,284 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 137.0) internal successors, (10138), 74 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states 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 21:20:43,284 INFO L175 Difference]: Start difference. First operand has 677 places, 4134 transitions, 170891 flow. Second operand 73 states and 4384 transitions. [2023-08-30 21:20:43,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 4710 transitions, 194345 flow [2023-08-30 21:21:20,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 4710 transitions, 192161 flow, removed 387 selfloop flow, removed 41 redundant places. [2023-08-30 21:21:20,875 INFO L231 Difference]: Finished difference. Result has 712 places, 4362 transitions, 186521 flow [2023-08-30 21:21:20,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=168503, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=186521, PETRI_PLACES=712, PETRI_TRANSITIONS=4362} [2023-08-30 21:21:20,878 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 692 predicate places. [2023-08-30 21:21:20,878 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 4362 transitions, 186521 flow [2023-08-30 21:21:20,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states 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 21:21:20,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:21:20,879 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:21:20,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 21:21:21,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 21:21:21,084 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:21:21,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:21:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1247701379, now seen corresponding path program 30 times [2023-08-30 21:21:21,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:21:21,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666998881] [2023-08-30 21:21:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:21:21,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:21:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:21:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:21:21,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:21:21,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666998881] [2023-08-30 21:21:21,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666998881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:21:21,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629812169] [2023-08-30 21:21:21,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:21:21,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:21:21,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:21:21,307 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:21:21,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 21:21:21,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:21:21,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:21:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:21:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:21:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:21:21,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:21:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:21:21,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629812169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:21:21,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:21:21,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-30 21:21:21,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497429600] [2023-08-30 21:21:21,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:21:21,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:21:21,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:21:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:21:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:21:21,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:21:21,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 4362 transitions, 186521 flow. Second operand has 28 states, 28 states have (on average 56.92857142857143) internal successors, (1594), 28 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states 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 21:21:21,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:21:21,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:21:21,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:00,244 INFO L130 PetriNetUnfolder]: 14093/27798 cut-off events. [2023-08-30 21:22:00,244 INFO L131 PetriNetUnfolder]: For 1832570/1832570 co-relation queries the response was YES. [2023-08-30 21:22:00,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394317 conditions, 27798 events. 14093/27798 cut-off events. For 1832570/1832570 co-relation queries the response was YES. Maximal size of possible extension queue 2152. Compared 279662 event pairs, 199 based on Foata normal form. 126/27924 useless extension candidates. Maximal degree in co-relation 393110. Up to 8540 conditions per place. [2023-08-30 21:22:00,799 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 871 selfloop transitions, 3890 changer transitions 17/4778 dead transitions. [2023-08-30 21:22:00,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 4778 transitions, 208282 flow [2023-08-30 21:22:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 21:22:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 21:22:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2480 transitions. [2023-08-30 21:22:00,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44151682392736336 [2023-08-30 21:22:00,801 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2480 transitions. [2023-08-30 21:22:00,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2480 transitions. [2023-08-30 21:22:00,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:00,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2480 transitions. [2023-08-30 21:22:00,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 60.48780487804878) internal successors, (2480), 41 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states 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 21:22:00,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 137.0) internal successors, (5754), 42 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states 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 21:22:00,806 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 137.0) internal successors, (5754), 42 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states 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 21:22:00,806 INFO L175 Difference]: Start difference. First operand has 712 places, 4362 transitions, 186521 flow. Second operand 41 states and 2480 transitions. [2023-08-30 21:22:00,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 4778 transitions, 208282 flow [2023-08-30 21:22:44,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 710 places, 4778 transitions, 206235 flow, removed 359 selfloop flow, removed 42 redundant places. [2023-08-30 21:22:44,748 INFO L231 Difference]: Finished difference. Result has 720 places, 4585 transitions, 205454 flow [2023-08-30 21:22:44,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=184563, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=205454, PETRI_PLACES=720, PETRI_TRANSITIONS=4585} [2023-08-30 21:22:44,751 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 700 predicate places. [2023-08-30 21:22:44,751 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 4585 transitions, 205454 flow [2023-08-30 21:22:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 56.92857142857143) internal successors, (1594), 28 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states 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 21:22:44,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:44,752 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:22:44,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-30 21:22:44,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:44,953 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:22:44,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:44,953 INFO L85 PathProgramCache]: Analyzing trace with hash -374253849, now seen corresponding path program 31 times [2023-08-30 21:22:44,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:44,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187305151] [2023-08-30 21:22:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:44,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:45,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:45,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187305151] [2023-08-30 21:22:45,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187305151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:45,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458069956] [2023-08-30 21:22:45,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:22:45,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:45,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:45,119 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:22:45,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 21:22:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:22:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:45,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:45,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458069956] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:22:45,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:22:45,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 21:22:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452492725] [2023-08-30 21:22:45,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:22:45,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 21:22:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:45,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 21:22:45,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2023-08-30 21:22:45,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:22:45,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 4585 transitions, 205454 flow. Second operand has 27 states, 27 states have (on average 56.74074074074074) internal successors, (1532), 27 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states 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 21:22:45,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:45,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:22:45,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:23:37,826 INFO L130 PetriNetUnfolder]: 15802/31241 cut-off events. [2023-08-30 21:23:37,826 INFO L131 PetriNetUnfolder]: For 2252934/2252934 co-relation queries the response was YES. [2023-08-30 21:23:38,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455355 conditions, 31241 events. 15802/31241 cut-off events. For 2252934/2252934 co-relation queries the response was YES. Maximal size of possible extension queue 2295. Compared 319383 event pairs, 238 based on Foata normal form. 104/31345 useless extension candidates. Maximal degree in co-relation 453557. Up to 6871 conditions per place. [2023-08-30 21:23:38,521 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 564 selfloop transitions, 4778 changer transitions 13/5355 dead transitions. [2023-08-30 21:23:38,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 5355 transitions, 241091 flow [2023-08-30 21:23:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-30 21:23:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-30 21:23:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3710 transitions. [2023-08-30 21:23:38,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367789027548858 [2023-08-30 21:23:38,524 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3710 transitions. [2023-08-30 21:23:38,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3710 transitions. [2023-08-30 21:23:38,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:23:38,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3710 transitions. [2023-08-30 21:23:38,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 59.83870967741935) internal successors, (3710), 62 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states 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 21:23:38,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 137.0) internal successors, (8631), 63 states have internal predecessors, (8631), 0 states have call successors, (0), 0 states 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 21:23:38,532 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 137.0) internal successors, (8631), 63 states have internal predecessors, (8631), 0 states have call successors, (0), 0 states 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 21:23:38,532 INFO L175 Difference]: Start difference. First operand has 720 places, 4585 transitions, 205454 flow. Second operand 62 states and 3710 transitions. [2023-08-30 21:23:38,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 5355 transitions, 241091 flow [2023-08-30 21:24:31,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 766 places, 5355 transitions, 240645 flow, removed 147 selfloop flow, removed 15 redundant places. [2023-08-30 21:24:32,056 INFO L231 Difference]: Finished difference. Result has 781 places, 5166 transitions, 243311 flow [2023-08-30 21:24:32,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=204975, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=243311, PETRI_PLACES=781, PETRI_TRANSITIONS=5166} [2023-08-30 21:24:32,061 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 761 predicate places. [2023-08-30 21:24:32,061 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 5166 transitions, 243311 flow [2023-08-30 21:24:32,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.74074074074074) internal successors, (1532), 27 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states 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 21:24:32,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:32,061 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:24:32,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:32,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:32,267 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:24:32,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash 843710407, now seen corresponding path program 32 times [2023-08-30 21:24:32,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:32,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368213863] [2023-08-30 21:24:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:32,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:24:32,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:32,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368213863] [2023-08-30 21:24:32,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368213863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:32,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347195571] [2023-08-30 21:24:32,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:24:32,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:32,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:32,413 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:32,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 21:24:32,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:24:32,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:32,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:24:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:24:32,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:24:32,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347195571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:32,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:32,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2023-08-30 21:24:32,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195427527] [2023-08-30 21:24:32,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:32,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 21:24:32,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 21:24:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2023-08-30 21:24:32,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:24:32,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 5166 transitions, 243311 flow. Second operand has 27 states, 27 states have (on average 56.81481481481482) internal successors, (1534), 27 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states 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 21:24:32,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:32,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:24:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:25:38,316 INFO L130 PetriNetUnfolder]: 17620/34603 cut-off events. [2023-08-30 21:25:38,317 INFO L131 PetriNetUnfolder]: For 2812587/2812587 co-relation queries the response was YES. [2023-08-30 21:25:39,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539688 conditions, 34603 events. 17620/34603 cut-off events. For 2812587/2812587 co-relation queries the response was YES. Maximal size of possible extension queue 2584. Compared 358028 event pairs, 237 based on Foata normal form. 684/35287 useless extension candidates. Maximal degree in co-relation 537878. Up to 11657 conditions per place. [2023-08-30 21:25:39,685 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1721 selfloop transitions, 4292 changer transitions 91/6104 dead transitions. [2023-08-30 21:25:39,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 6104 transitions, 293304 flow [2023-08-30 21:25:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 21:25:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 21:25:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2660 transitions. [2023-08-30 21:25:39,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44127405441274054 [2023-08-30 21:25:39,687 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2660 transitions. [2023-08-30 21:25:39,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2660 transitions. [2023-08-30 21:25:39,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:25:39,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2660 transitions. [2023-08-30 21:25:39,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 60.45454545454545) internal successors, (2660), 44 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states 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 21:25:39,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 137.0) internal successors, (6165), 45 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states 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 21:25:39,694 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 137.0) internal successors, (6165), 45 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states 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 21:25:39,694 INFO L175 Difference]: Start difference. First operand has 781 places, 5166 transitions, 243311 flow. Second operand 44 states and 2660 transitions. [2023-08-30 21:25:39,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 6104 transitions, 293304 flow [2023-08-30 21:27:11,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 6104 transitions, 287470 flow, removed 1162 selfloop flow, removed 24 redundant places. [2023-08-30 21:27:11,734 INFO L231 Difference]: Finished difference. Result has 810 places, 5778 transitions, 280384 flow [2023-08-30 21:27:11,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=238068, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3632, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=280384, PETRI_PLACES=810, PETRI_TRANSITIONS=5778} [2023-08-30 21:27:11,738 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 790 predicate places. [2023-08-30 21:27:11,739 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 5778 transitions, 280384 flow [2023-08-30 21:27:11,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.81481481481482) internal successors, (1534), 27 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states 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 21:27:11,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:27:11,739 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:27:11,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 21:27:11,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 21:27:11,949 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:27:11,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:27:11,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1484966421, now seen corresponding path program 33 times [2023-08-30 21:27:11,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:27:11,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797017921] [2023-08-30 21:27:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:27:11,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:27:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:27:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:27:12,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:27:12,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797017921] [2023-08-30 21:27:12,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797017921] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:27:12,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027979307] [2023-08-30 21:27:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:27:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:27:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:27:12,165 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:27:12,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 21:27:12,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 21:27:12,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:27:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:27:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:27:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:27:12,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:27:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:27:12,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027979307] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:27:12,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:27:12,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2023-08-30 21:27:12,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682196302] [2023-08-30 21:27:12,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:27:12,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:27:12,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:27:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:27:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:27:13,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-30 21:27:13,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 5778 transitions, 280384 flow. Second operand has 29 states, 29 states have (on average 56.58620689655172) internal successors, (1641), 29 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states 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 21:27:13,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:27:13,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-30 21:27:13,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:28:44,902 INFO L130 PetriNetUnfolder]: 20082/39656 cut-off events. [2023-08-30 21:28:44,902 INFO L131 PetriNetUnfolder]: For 3344915/3344915 co-relation queries the response was YES. [2023-08-30 21:28:46,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621852 conditions, 39656 events. 20082/39656 cut-off events. For 3344915/3344915 co-relation queries the response was YES. Maximal size of possible extension queue 2890. Compared 417405 event pairs, 295 based on Foata normal form. 344/40000 useless extension candidates. Maximal degree in co-relation 619398. Up to 10457 conditions per place. [2023-08-30 21:28:46,894 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 2245 selfloop transitions, 4597 changer transitions 36/6878 dead transitions. [2023-08-30 21:28:46,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 6878 transitions, 338387 flow [2023-08-30 21:28:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 21:28:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 21:28:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2718 transitions. [2023-08-30 21:28:46,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408759124087591 [2023-08-30 21:28:46,898 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2718 transitions. [2023-08-30 21:28:46,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2718 transitions. [2023-08-30 21:28:46,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:28:46,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2718 transitions. [2023-08-30 21:28:46,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 60.4) internal successors, (2718), 45 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states 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 21:28:46,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 137.0) internal successors, (6302), 46 states have internal predecessors, (6302), 0 states have call successors, (0), 0 states 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 21:28:46,905 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 137.0) internal successors, (6302), 46 states have internal predecessors, (6302), 0 states have call successors, (0), 0 states 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 21:28:46,905 INFO L175 Difference]: Start difference. First operand has 810 places, 5778 transitions, 280384 flow. Second operand 45 states and 2718 transitions. [2023-08-30 21:28:46,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 6878 transitions, 338387 flow Killed by 15