./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:04:27,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:04:27,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:04:27,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:04:27,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:04:27,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:04:27,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:04:27,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:04:27,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:04:27,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:04:27,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:04:27,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:04:27,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:04:27,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:04:27,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:04:27,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:04:27,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:04:27,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:04:27,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:04:27,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:04:27,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:04:27,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:04:27,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:04:27,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:04:27,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:04:27,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:04:27,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:04:27,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:04:27,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:04:27,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:04:27,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:04:27,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:04:27,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:04:27,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:04:27,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:04:27,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:04:27,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:04:27,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:04:27,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:04:27,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:04:27,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:04:27,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:04:27,864 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:04:27,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:04:27,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:04:27,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:04:27,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:04:27,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:04:27,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:04:27,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:04:27,868 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:04:27,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:04:27,869 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:04:27,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:04:27,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:04:27,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:04:27,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:04:27,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:04:27,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:04:27,871 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:04:27,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:04:27,871 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:04:27,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:04:27,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:04:27,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:04:27,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:04:27,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:04:27,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:04:27,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:04:27,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:04:27,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:04:27,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:04:27,873 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:04:27,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:04:27,874 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:04:27,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:04:27,874 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:04:27,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:04:28,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:04:28,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:04:28,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:04:28,236 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:04:28,236 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:04:28,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-31 01:04:29,502 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:04:29,727 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:04:29,727 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-31 01:04:29,732 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fe593cb/06b155bea1d14a7fb545e28cb072505c/FLAG97092ee99 [2023-08-31 01:04:29,744 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fe593cb/06b155bea1d14a7fb545e28cb072505c [2023-08-31 01:04:29,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:04:29,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:04:29,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:04:29,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:04:29,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:04:29,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:29,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4158c8ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29, skipping insertion in model container [2023-08-31 01:04:29,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:29,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:04:29,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:04:29,909 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-31 01:04:29,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:04:29,925 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:04:29,943 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/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-31 01:04:29,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:04:29,960 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:04:29,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29 WrapperNode [2023-08-31 01:04:29,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:04:29,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:04:29,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:04:29,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:04:29,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:29,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,000 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 198 [2023-08-31 01:04:30,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:04:30,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:04:30,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:04:30,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:04:30,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:04:30,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:04:30,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:04:30,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:04:30,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (1/1) ... [2023-08-31 01:04:30,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:04:30,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:04:30,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 01:04:30,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 01:04:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:04:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:04:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:04:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:04:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:04:30,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:04:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:04:30,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:04:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:04:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:04:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:04:30,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:04:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:04:30,178 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:04:30,302 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:04:30,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:04:30,658 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:04:30,683 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:04:30,684 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 01:04:30,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:04:30 BoogieIcfgContainer [2023-08-31 01:04:30,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:04:30,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:04:30,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:04:30,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:04:30,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:04:29" (1/3) ... [2023-08-31 01:04:30,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc41ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:04:30, skipping insertion in model container [2023-08-31 01:04:30,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:04:29" (2/3) ... [2023-08-31 01:04:30,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc41ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:04:30, skipping insertion in model container [2023-08-31 01:04:30,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:04:30" (3/3) ... [2023-08-31 01:04:30,717 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-08-31 01:04:30,723 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:04:30,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:04:30,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:04:30,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:04:30,870 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 01:04:30,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 478 flow [2023-08-31 01:04:30,986 INFO L130 PetriNetUnfolder]: 21/229 cut-off events. [2023-08-31 01:04:30,986 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:04:30,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 229 events. 21/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-08-31 01:04:30,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 478 flow [2023-08-31 01:04:30,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 221 transitions, 454 flow [2023-08-31 01:04:31,000 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:04:31,009 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 454 flow [2023-08-31 01:04:31,011 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 454 flow [2023-08-31 01:04:31,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 454 flow [2023-08-31 01:04:31,071 INFO L130 PetriNetUnfolder]: 21/221 cut-off events. [2023-08-31 01:04:31,071 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:04:31,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 221 events. 21/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 269 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-08-31 01:04:31,077 INFO L119 LiptonReduction]: Number of co-enabled transitions 5400 [2023-08-31 01:04:36,730 INFO L134 LiptonReduction]: Checked pairs total: 5353 [2023-08-31 01:04:36,730 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-08-31 01:04:36,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:04:36,748 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;@4a026ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:04:36,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 01:04:36,753 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-08-31 01:04:36,753 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:04:36,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:36,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:36,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:36,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:36,758 INFO L85 PathProgramCache]: Analyzing trace with hash 659682560, now seen corresponding path program 1 times [2023-08-31 01:04:36,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:36,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400041772] [2023-08-31 01:04:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:36,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:04:37,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:37,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400041772] [2023-08-31 01:04:37,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400041772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:04:37,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:04:37,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:04:37,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149539317] [2023-08-31 01:04:37,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:04:37,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:04:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:37,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:04:37,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:04:37,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 489 [2023-08-31 01:04:37,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:37,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:37,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 489 [2023-08-31 01:04:37,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:37,256 INFO L130 PetriNetUnfolder]: 53/98 cut-off events. [2023-08-31 01:04:37,256 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 01:04:37,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 53/98 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 190 event pairs, 33 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 97 conditions per place. [2023-08-31 01:04:37,258 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-08-31 01:04:37,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 100 flow [2023-08-31 01:04:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:04:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:04:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-31 01:04:37,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274028629856851 [2023-08-31 01:04:37,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-31 01:04:37,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-31 01:04:37,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:37,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-31 01:04:37,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:37,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:37,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:37,300 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 52 flow. Second operand 3 states and 627 transitions. [2023-08-31 01:04:37,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 100 flow [2023-08-31 01:04:37,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 01:04:37,308 INFO L231 Difference]: Finished difference. Result has 22 places, 22 transitions, 66 flow [2023-08-31 01:04:37,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=22} [2023-08-31 01:04:37,316 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-31 01:04:37,317 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 22 transitions, 66 flow [2023-08-31 01:04:37,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:37,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:37,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:37,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:04:37,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:37,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1043919621, now seen corresponding path program 1 times [2023-08-31 01:04:37,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:37,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636853878] [2023-08-31 01:04:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:37,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:04:37,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:37,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636853878] [2023-08-31 01:04:37,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636853878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:04:37,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443516082] [2023-08-31 01:04:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:37,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:37,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:04:37,581 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:04:37,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:04:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 01:04:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:04:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:04:37,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:04:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:04:37,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443516082] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:04:37,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:04:37,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-31 01:04:37,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062663864] [2023-08-31 01:04:37,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:04:37,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:04:37,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:37,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:04:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:04:37,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 489 [2023-08-31 01:04:37,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:37,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:37,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 489 [2023-08-31 01:04:37,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:38,013 INFO L130 PetriNetUnfolder]: 53/104 cut-off events. [2023-08-31 01:04:38,013 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 01:04:38,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 104 events. 53/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 187 event pairs, 33 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 202. Up to 97 conditions per place. [2023-08-31 01:04:38,014 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2023-08-31 01:04:38,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 146 flow [2023-08-31 01:04:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:04:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:04:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1216 transitions. [2023-08-31 01:04:38,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41445126107702795 [2023-08-31 01:04:38,027 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1216 transitions. [2023-08-31 01:04:38,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1216 transitions. [2023-08-31 01:04:38,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:38,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1216 transitions. [2023-08-31 01:04:38,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.66666666666666) internal successors, (1216), 6 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:38,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:38,036 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:38,037 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 66 flow. Second operand 6 states and 1216 transitions. [2023-08-31 01:04:38,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 146 flow [2023-08-31 01:04:38,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:04:38,039 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 128 flow [2023-08-31 01:04:38,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-31 01:04:38,040 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2023-08-31 01:04:38,040 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 128 flow [2023-08-31 01:04:38,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:38,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:38,042 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:38,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 01:04:38,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:38,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:38,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:38,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1002026432, now seen corresponding path program 2 times [2023-08-31 01:04:38,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:38,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143046466] [2023-08-31 01:04:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:38,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 01:04:38,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143046466] [2023-08-31 01:04:38,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143046466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:04:38,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752069052] [2023-08-31 01:04:38,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:04:38,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:38,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:04:38,513 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:04:38,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:04:38,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:04:38,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:04:38,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 01:04:38,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:04:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:04:38,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:04:38,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752069052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:04:38,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:04:38,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-31 01:04:38,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676982627] [2023-08-31 01:04:38,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:04:38,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:04:38,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:38,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:04:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:04:38,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-08-31 01:04:38,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:38,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:38,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-08-31 01:04:38,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:38,816 INFO L130 PetriNetUnfolder]: 88/171 cut-off events. [2023-08-31 01:04:38,816 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:04:38,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 171 events. 88/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 478 event pairs, 33 based on Foata normal form. 4/140 useless extension candidates. Maximal degree in co-relation 330. Up to 105 conditions per place. [2023-08-31 01:04:38,819 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 41 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2023-08-31 01:04:38,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 260 flow [2023-08-31 01:04:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:04:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:04:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 855 transitions. [2023-08-31 01:04:38,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371165644171779 [2023-08-31 01:04:38,822 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 855 transitions. [2023-08-31 01:04:38,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 855 transitions. [2023-08-31 01:04:38,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:38,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 855 transitions. [2023-08-31 01:04:38,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.75) internal successors, (855), 4 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:38,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:38,829 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:38,829 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 128 flow. Second operand 4 states and 855 transitions. [2023-08-31 01:04:38,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 260 flow [2023-08-31 01:04:38,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 244 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 01:04:38,834 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 132 flow [2023-08-31 01:04:38,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-31 01:04:38,834 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2023-08-31 01:04:38,834 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 132 flow [2023-08-31 01:04:38,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:38,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:38,835 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:38,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 01:04:39,036 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,SelfDestructingSolverStorable2 [2023-08-31 01:04:39,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:39,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 637732292, now seen corresponding path program 3 times [2023-08-31 01:04:39,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:39,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366442847] [2023-08-31 01:04:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 01:04:39,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:39,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366442847] [2023-08-31 01:04:39,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366442847] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:04:39,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618198028] [2023-08-31 01:04:39,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:04:39,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:39,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:04:39,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:04:39,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:04:39,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:04:39,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:04:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 01:04:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:04:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:04:39,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:04:39,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618198028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:04:39,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:04:39,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-31 01:04:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563117850] [2023-08-31 01:04:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:04:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:04:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:04:39,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:04:39,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-08-31 01:04:39,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:39,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:39,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-08-31 01:04:39,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:39,460 INFO L130 PetriNetUnfolder]: 136/259 cut-off events. [2023-08-31 01:04:39,460 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 01:04:39,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 259 events. 136/259 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 831 event pairs, 60 based on Foata normal form. 2/224 useless extension candidates. Maximal degree in co-relation 602. Up to 176 conditions per place. [2023-08-31 01:04:39,462 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 48 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-31 01:04:39,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 304 flow [2023-08-31 01:04:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:04:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:04:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 854 transitions. [2023-08-31 01:04:39,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43660531697341515 [2023-08-31 01:04:39,465 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 854 transitions. [2023-08-31 01:04:39,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 854 transitions. [2023-08-31 01:04:39,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:39,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 854 transitions. [2023-08-31 01:04:39,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:39,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:39,472 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:39,472 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 132 flow. Second operand 4 states and 854 transitions. [2023-08-31 01:04:39,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 304 flow [2023-08-31 01:04:39,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:04:39,475 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 150 flow [2023-08-31 01:04:39,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-31 01:04:39,476 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2023-08-31 01:04:39,476 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 150 flow [2023-08-31 01:04:39,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:39,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:39,477 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:39,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:04:39,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:39,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:39,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1056425402, now seen corresponding path program 4 times [2023-08-31 01:04:39,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:39,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896755819] [2023-08-31 01:04:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:39,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 01:04:39,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:39,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896755819] [2023-08-31 01:04:39,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896755819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:04:39,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133196636] [2023-08-31 01:04:39,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:04:39,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:39,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:04:39,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:04:39,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:04:39,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:04:39,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:04:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:04:39,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:04:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 01:04:40,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:04:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 01:04:40,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133196636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:04:40,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:04:40,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 01:04:40,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299742666] [2023-08-31 01:04:40,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:04:40,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:04:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:40,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:04:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:04:40,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 489 [2023-08-31 01:04:40,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 199.15384615384616) internal successors, (2589), 13 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:40,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 489 [2023-08-31 01:04:40,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:40,323 INFO L130 PetriNetUnfolder]: 136/261 cut-off events. [2023-08-31 01:04:40,324 INFO L131 PetriNetUnfolder]: For 230/230 co-relation queries the response was YES. [2023-08-31 01:04:40,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 261 events. 136/261 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 791 event pairs, 104 based on Foata normal form. 1/243 useless extension candidates. Maximal degree in co-relation 722. Up to 252 conditions per place. [2023-08-31 01:04:40,325 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 22 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2023-08-31 01:04:40,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 230 flow [2023-08-31 01:04:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:04:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:04:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1411 transitions. [2023-08-31 01:04:40,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41221151037101955 [2023-08-31 01:04:40,329 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1411 transitions. [2023-08-31 01:04:40,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1411 transitions. [2023-08-31 01:04:40,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:40,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1411 transitions. [2023-08-31 01:04:40,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.57142857142858) internal successors, (1411), 7 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,338 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,338 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 150 flow. Second operand 7 states and 1411 transitions. [2023-08-31 01:04:40,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 230 flow [2023-08-31 01:04:40,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 226 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:04:40,341 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 192 flow [2023-08-31 01:04:40,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-31 01:04:40,341 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2023-08-31 01:04:40,342 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 192 flow [2023-08-31 01:04:40,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.15384615384616) internal successors, (2589), 13 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:40,343 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:40,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 01:04:40,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:40,549 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:40,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash -871821335, now seen corresponding path program 5 times [2023-08-31 01:04:40,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:40,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350019701] [2023-08-31 01:04:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:40,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:40,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:40,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350019701] [2023-08-31 01:04:40,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350019701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:04:40,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:04:40,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:04:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336896816] [2023-08-31 01:04:40,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:04:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:04:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:04:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:04:40,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 489 [2023-08-31 01:04:40,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:40,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 489 [2023-08-31 01:04:40,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:40,928 INFO L130 PetriNetUnfolder]: 158/299 cut-off events. [2023-08-31 01:04:40,929 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-31 01:04:40,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 299 events. 158/299 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1083 event pairs, 18 based on Foata normal form. 16/297 useless extension candidates. Maximal degree in co-relation 778. Up to 246 conditions per place. [2023-08-31 01:04:40,930 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-31 01:04:40,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 352 flow [2023-08-31 01:04:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:04:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:04:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 846 transitions. [2023-08-31 01:04:40,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325153374233129 [2023-08-31 01:04:40,933 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 846 transitions. [2023-08-31 01:04:40,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 846 transitions. [2023-08-31 01:04:40,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:40,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 846 transitions. [2023-08-31 01:04:40,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,939 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,939 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 192 flow. Second operand 4 states and 846 transitions. [2023-08-31 01:04:40,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 352 flow [2023-08-31 01:04:40,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 328 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-31 01:04:40,941 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 199 flow [2023-08-31 01:04:40,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-08-31 01:04:40,942 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2023-08-31 01:04:40,942 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 199 flow [2023-08-31 01:04:40,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:40,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:40,943 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:40,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:04:40,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:40,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:40,944 INFO L85 PathProgramCache]: Analyzing trace with hash -29914819, now seen corresponding path program 6 times [2023-08-31 01:04:40,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:40,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349409051] [2023-08-31 01:04:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:40,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349409051] [2023-08-31 01:04:41,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349409051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:04:41,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:04:41,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:04:41,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113406102] [2023-08-31 01:04:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:04:41,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:04:41,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:04:41,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:04:41,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 489 [2023-08-31 01:04:41,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:41,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 489 [2023-08-31 01:04:41,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:41,265 INFO L130 PetriNetUnfolder]: 160/299 cut-off events. [2023-08-31 01:04:41,265 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-08-31 01:04:41,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 299 events. 160/299 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 976 event pairs, 34 based on Foata normal form. 8/285 useless extension candidates. Maximal degree in co-relation 872. Up to 206 conditions per place. [2023-08-31 01:04:41,268 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 6 changer transitions 1/52 dead transitions. [2023-08-31 01:04:41,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 367 flow [2023-08-31 01:04:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:04:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:04:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 845 transitions. [2023-08-31 01:04:41,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320040899795501 [2023-08-31 01:04:41,271 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 845 transitions. [2023-08-31 01:04:41,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 845 transitions. [2023-08-31 01:04:41,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:41,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 845 transitions. [2023-08-31 01:04:41,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,276 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,276 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 199 flow. Second operand 4 states and 845 transitions. [2023-08-31 01:04:41,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 367 flow [2023-08-31 01:04:41,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:04:41,279 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 234 flow [2023-08-31 01:04:41,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-31 01:04:41,280 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2023-08-31 01:04:41,280 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 234 flow [2023-08-31 01:04:41,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:41,281 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:41,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:04:41,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:41,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:41,282 INFO L85 PathProgramCache]: Analyzing trace with hash 537168199, now seen corresponding path program 1 times [2023-08-31 01:04:41,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:41,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911859225] [2023-08-31 01:04:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:41,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-31 01:04:41,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:41,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911859225] [2023-08-31 01:04:41,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911859225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:04:41,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:04:41,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:04:41,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922456856] [2023-08-31 01:04:41,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:04:41,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:04:41,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:41,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:04:41,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:04:41,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 489 [2023-08-31 01:04:41,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:41,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 489 [2023-08-31 01:04:41,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:41,681 INFO L130 PetriNetUnfolder]: 145/270 cut-off events. [2023-08-31 01:04:41,681 INFO L131 PetriNetUnfolder]: For 591/591 co-relation queries the response was YES. [2023-08-31 01:04:41,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 270 events. 145/270 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 847 event pairs, 54 based on Foata normal form. 6/258 useless extension candidates. Maximal degree in co-relation 847. Up to 182 conditions per place. [2023-08-31 01:04:41,684 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 46 selfloop transitions, 6 changer transitions 3/55 dead transitions. [2023-08-31 01:04:41,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 415 flow [2023-08-31 01:04:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:04:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:04:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2023-08-31 01:04:41,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340490797546012 [2023-08-31 01:04:41,687 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2023-08-31 01:04:41,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2023-08-31 01:04:41,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:41,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2023-08-31 01:04:41,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,694 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,694 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 234 flow. Second operand 4 states and 849 transitions. [2023-08-31 01:04:41,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 415 flow [2023-08-31 01:04:41,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 408 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:04:41,698 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 257 flow [2023-08-31 01:04:41,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-31 01:04:41,699 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-08-31 01:04:41,700 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 257 flow [2023-08-31 01:04:41,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:41,700 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:41,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:04:41,701 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:41,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:41,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1727705847, now seen corresponding path program 1 times [2023-08-31 01:04:41,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:41,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318757760] [2023-08-31 01:04:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:41,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-31 01:04:41,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:41,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318757760] [2023-08-31 01:04:41,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318757760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:04:41,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:04:41,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:04:41,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493620179] [2023-08-31 01:04:41,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:04:41,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:04:41,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:04:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:04:41,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 489 [2023-08-31 01:04:41,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:41,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:41,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 489 [2023-08-31 01:04:41,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:42,062 INFO L130 PetriNetUnfolder]: 125/230 cut-off events. [2023-08-31 01:04:42,062 INFO L131 PetriNetUnfolder]: For 663/663 co-relation queries the response was YES. [2023-08-31 01:04:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 230 events. 125/230 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 639 event pairs, 51 based on Foata normal form. 12/224 useless extension candidates. Maximal degree in co-relation 757. Up to 177 conditions per place. [2023-08-31 01:04:42,065 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 47 selfloop transitions, 7 changer transitions 1/55 dead transitions. [2023-08-31 01:04:42,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 439 flow [2023-08-31 01:04:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:04:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:04:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 845 transitions. [2023-08-31 01:04:42,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320040899795501 [2023-08-31 01:04:42,068 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 845 transitions. [2023-08-31 01:04:42,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 845 transitions. [2023-08-31 01:04:42,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:42,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 845 transitions. [2023-08-31 01:04:42,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:42,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:42,073 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:42,074 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 257 flow. Second operand 4 states and 845 transitions. [2023-08-31 01:04:42,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 439 flow [2023-08-31 01:04:42,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 413 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-31 01:04:42,077 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 270 flow [2023-08-31 01:04:42,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-31 01:04:42,077 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-08-31 01:04:42,078 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 270 flow [2023-08-31 01:04:42,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:42,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:42,078 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:42,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:04:42,079 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:42,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:42,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1304321571, now seen corresponding path program 1 times [2023-08-31 01:04:42,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:42,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903500939] [2023-08-31 01:04:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:42,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:43,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:43,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903500939] [2023-08-31 01:04:43,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903500939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:04:43,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181397597] [2023-08-31 01:04:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:43,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:43,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:04:43,141 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:04:43,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:04:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:43,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:04:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:04:43,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:04:43,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:04:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:43,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:04:44,275 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:04:44,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 50 [2023-08-31 01:04:44,315 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:04:44,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:04:44,319 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:04:44,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:04:44,323 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:04:44,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:04:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181397597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:04:44,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:04:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-31 01:04:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269098967] [2023-08-31 01:04:44,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:04:44,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:04:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:04:44,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:04:45,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-31 01:04:45,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 270 flow. Second operand has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:45,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:45,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-31 01:04:45,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:47,024 INFO L130 PetriNetUnfolder]: 233/427 cut-off events. [2023-08-31 01:04:47,024 INFO L131 PetriNetUnfolder]: For 1029/1029 co-relation queries the response was YES. [2023-08-31 01:04:47,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 427 events. 233/427 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1621 event pairs, 12 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1404. Up to 150 conditions per place. [2023-08-31 01:04:47,032 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 71 selfloop transitions, 26 changer transitions 14/111 dead transitions. [2023-08-31 01:04:47,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 796 flow [2023-08-31 01:04:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:04:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:04:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2745 transitions. [2023-08-31 01:04:47,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37423312883435583 [2023-08-31 01:04:47,041 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2745 transitions. [2023-08-31 01:04:47,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2745 transitions. [2023-08-31 01:04:47,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:47,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2745 transitions. [2023-08-31 01:04:47,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.0) internal successors, (2745), 15 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:47,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:47,061 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:47,061 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 270 flow. Second operand 15 states and 2745 transitions. [2023-08-31 01:04:47,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 796 flow [2023-08-31 01:04:47,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 111 transitions, 744 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-31 01:04:47,065 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 451 flow [2023-08-31 01:04:47,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=451, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-08-31 01:04:47,066 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 48 predicate places. [2023-08-31 01:04:47,066 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 451 flow [2023-08-31 01:04:47,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:47,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:47,068 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:47,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 01:04:47,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-31 01:04:47,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:47,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1278507897, now seen corresponding path program 2 times [2023-08-31 01:04:47,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:47,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855157246] [2023-08-31 01:04:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:48,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:48,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855157246] [2023-08-31 01:04:48,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855157246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:04:48,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481258001] [2023-08-31 01:04:48,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:04:48,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:48,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:04:48,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:04:48,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:04:48,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:04:48,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:04:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:04:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:04:48,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:04:48,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:04:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:48,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:04:49,000 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-31 01:04:49,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 103 [2023-08-31 01:04:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:49,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481258001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:04:49,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:04:49,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-31 01:04:49,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173729039] [2023-08-31 01:04:49,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:04:49,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:04:49,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:49,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:04:49,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:04:50,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-31 01:04:50,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 451 flow. Second operand has 24 states, 24 states have (on average 180.04166666666666) internal successors, (4321), 24 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:50,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:50,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-31 01:04:50,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:51,297 INFO L130 PetriNetUnfolder]: 268/482 cut-off events. [2023-08-31 01:04:51,297 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2023-08-31 01:04:51,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 482 events. 268/482 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1861 event pairs, 34 based on Foata normal form. 1/483 useless extension candidates. Maximal degree in co-relation 1958. Up to 327 conditions per place. [2023-08-31 01:04:51,302 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 64 selfloop transitions, 33 changer transitions 4/101 dead transitions. [2023-08-31 01:04:51,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 891 flow [2023-08-31 01:04:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:04:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:04:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2560 transitions. [2023-08-31 01:04:51,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37394098743792 [2023-08-31 01:04:51,310 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2560 transitions. [2023-08-31 01:04:51,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2560 transitions. [2023-08-31 01:04:51,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:51,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2560 transitions. [2023-08-31 01:04:51,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 182.85714285714286) internal successors, (2560), 14 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:51,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:51,327 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:51,327 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 451 flow. Second operand 14 states and 2560 transitions. [2023-08-31 01:04:51,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 891 flow [2023-08-31 01:04:51,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 827 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-08-31 01:04:51,338 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 645 flow [2023-08-31 01:04:51,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=645, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-31 01:04:51,339 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 59 predicate places. [2023-08-31 01:04:51,339 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 645 flow [2023-08-31 01:04:51,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 180.04166666666666) internal successors, (4321), 24 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:51,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:51,340 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:51,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 01:04:51,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:51,552 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:51,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1488168775, now seen corresponding path program 3 times [2023-08-31 01:04:51,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:51,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282576133] [2023-08-31 01:04:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:51,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-31 01:04:53,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282576133] [2023-08-31 01:04:53,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282576133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:04:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204164252] [2023-08-31 01:04:53,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:04:53,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:53,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:04:53,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:04:53,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:04:53,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:04:53,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:04:53,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:04:53,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:04:53,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:04:53,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:04:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:53,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:04:54,287 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:04:54,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2023-08-31 01:04:54,320 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:04:54,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:04:54,324 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:04:54,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:04:54,328 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:04:54,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:04:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:54,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204164252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:04:54,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:04:54,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 30 [2023-08-31 01:04:54,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227906099] [2023-08-31 01:04:54,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:04:54,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:04:54,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:04:54,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:04:54,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-08-31 01:04:55,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 489 [2023-08-31 01:04:55,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 645 flow. Second operand has 31 states, 31 states have (on average 166.90322580645162) internal successors, (5174), 31 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:55,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:04:55,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 489 [2023-08-31 01:04:55,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:04:57,631 INFO L130 PetriNetUnfolder]: 597/1061 cut-off events. [2023-08-31 01:04:57,631 INFO L131 PetriNetUnfolder]: For 3820/3820 co-relation queries the response was YES. [2023-08-31 01:04:57,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1061 events. 597/1061 cut-off events. For 3820/3820 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5128 event pairs, 76 based on Foata normal form. 2/1063 useless extension candidates. Maximal degree in co-relation 4550. Up to 364 conditions per place. [2023-08-31 01:04:57,641 INFO L137 encePairwiseOnDemand]: 474/489 looper letters, 127 selfloop transitions, 84 changer transitions 4/215 dead transitions. [2023-08-31 01:04:57,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 215 transitions, 2100 flow [2023-08-31 01:04:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 01:04:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 01:04:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4751 transitions. [2023-08-31 01:04:57,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469909436167105 [2023-08-31 01:04:57,654 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4751 transitions. [2023-08-31 01:04:57,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4751 transitions. [2023-08-31 01:04:57,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:04:57,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4751 transitions. [2023-08-31 01:04:57,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 169.67857142857142) internal successors, (4751), 28 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:57,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:57,685 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:57,686 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 645 flow. Second operand 28 states and 4751 transitions. [2023-08-31 01:04:57,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 215 transitions, 2100 flow [2023-08-31 01:04:57,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 215 transitions, 1914 flow, removed 66 selfloop flow, removed 5 redundant places. [2023-08-31 01:04:57,704 INFO L231 Difference]: Finished difference. Result has 116 places, 127 transitions, 1312 flow [2023-08-31 01:04:57,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1312, PETRI_PLACES=116, PETRI_TRANSITIONS=127} [2023-08-31 01:04:57,705 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 93 predicate places. [2023-08-31 01:04:57,705 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 127 transitions, 1312 flow [2023-08-31 01:04:57,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 166.90322580645162) internal successors, (5174), 31 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:04:57,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:04:57,707 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:04:57,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 01:04:57,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:57,915 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:04:57,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:04:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1380522979, now seen corresponding path program 4 times [2023-08-31 01:04:57,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:04:57,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643138320] [2023-08-31 01:04:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:04:57,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:04:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:04:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:58,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:04:58,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643138320] [2023-08-31 01:04:58,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643138320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:04:58,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374695708] [2023-08-31 01:04:58,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:04:58,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:04:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:04:58,617 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) [2023-08-31 01:04:58,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:04:58,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:04:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:04:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:04:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:04:58,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:04:58,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-08-31 01:04:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:04:58,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:05:39,480 WARN L222 SmtUtils]: Spent 40.10s on a formula simplification. DAG size of input: 44 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 01:05:39,542 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:05:39,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-08-31 01:05:39,588 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-31 01:05:39,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-31 01:05:39,594 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-31 01:05:39,602 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:05:39,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:05:39,611 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:05:39,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:05:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:05:39,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374695708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:05:39,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:05:39,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-08-31 01:05:39,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465263591] [2023-08-31 01:05:39,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:05:39,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:05:39,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:05:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:05:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:05:41,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:05:43,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:05:45,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:05:47,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:05:49,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:05:51,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:05:53,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:05:55,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:05:57,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:05:59,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:01,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:03,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:05,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:08,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:10,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:12,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:14,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:16,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:18,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:20,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:22,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:24,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:26,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:26,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 489 [2023-08-31 01:06:26,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 127 transitions, 1312 flow. Second operand has 27 states, 27 states have (on average 166.14814814814815) internal successors, (4486), 27 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:26,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:06:26,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 489 [2023-08-31 01:06:26,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:06:27,049 INFO L130 PetriNetUnfolder]: 663/1177 cut-off events. [2023-08-31 01:06:27,049 INFO L131 PetriNetUnfolder]: For 4665/4665 co-relation queries the response was YES. [2023-08-31 01:06:27,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 1177 events. 663/1177 cut-off events. For 4665/4665 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5827 event pairs, 110 based on Foata normal form. 2/1159 useless extension candidates. Maximal degree in co-relation 5335. Up to 822 conditions per place. [2023-08-31 01:06:27,060 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 94 selfloop transitions, 64 changer transitions 3/161 dead transitions. [2023-08-31 01:06:27,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 161 transitions, 1844 flow [2023-08-31 01:06:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:06:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:06:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2033 transitions. [2023-08-31 01:06:27,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34645535105657804 [2023-08-31 01:06:27,066 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2033 transitions. [2023-08-31 01:06:27,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2033 transitions. [2023-08-31 01:06:27,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:06:27,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2033 transitions. [2023-08-31 01:06:27,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 169.41666666666666) internal successors, (2033), 12 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:27,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:27,078 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:27,078 INFO L175 Difference]: Start difference. First operand has 116 places, 127 transitions, 1312 flow. Second operand 12 states and 2033 transitions. [2023-08-31 01:06:27,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 161 transitions, 1844 flow [2023-08-31 01:06:27,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 161 transitions, 1712 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-08-31 01:06:27,101 INFO L231 Difference]: Finished difference. Result has 119 places, 139 transitions, 1486 flow [2023-08-31 01:06:27,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1486, PETRI_PLACES=119, PETRI_TRANSITIONS=139} [2023-08-31 01:06:27,102 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 96 predicate places. [2023-08-31 01:06:27,102 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 139 transitions, 1486 flow [2023-08-31 01:06:27,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 166.14814814814815) internal successors, (4486), 27 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:27,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:06:27,104 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:06:27,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 01:06:27,313 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,SelfDestructingSolverStorable12 [2023-08-31 01:06:27,314 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:06:27,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:06:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1922354213, now seen corresponding path program 5 times [2023-08-31 01:06:27,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:06:27,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052654741] [2023-08-31 01:06:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:06:27,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:06:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 01:06:28,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:06:28,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052654741] [2023-08-31 01:06:28,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052654741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:06:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143656430] [2023-08-31 01:06:28,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:06:28,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:06:28,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:06:28,701 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) [2023-08-31 01:06:28,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 01:06:28,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:06:28,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:06:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:06:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:06:29,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:29,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-08-31 01:06:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:29,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:06:30,052 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:06:30,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2023-08-31 01:06:30,083 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:06:30,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:06:30,087 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:06:30,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:06:30,092 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:06:30,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:06:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:30,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143656430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:06:30,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:06:30,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 8] total 29 [2023-08-31 01:06:30,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962661123] [2023-08-31 01:06:30,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:06:30,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:06:30,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:06:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:06:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-08-31 01:06:33,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:06:34,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 489 [2023-08-31 01:06:34,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 1486 flow. Second operand has 30 states, 30 states have (on average 169.93333333333334) internal successors, (5098), 30 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:34,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:06:34,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 489 [2023-08-31 01:06:34,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:06:35,982 INFO L130 PetriNetUnfolder]: 773/1371 cut-off events. [2023-08-31 01:06:35,983 INFO L131 PetriNetUnfolder]: For 6859/6859 co-relation queries the response was YES. [2023-08-31 01:06:35,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1371 events. 773/1371 cut-off events. For 6859/6859 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7182 event pairs, 135 based on Foata normal form. 4/1355 useless extension candidates. Maximal degree in co-relation 6711. Up to 932 conditions per place. [2023-08-31 01:06:35,995 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 103 selfloop transitions, 78 changer transitions 3/184 dead transitions. [2023-08-31 01:06:35,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 184 transitions, 2145 flow [2023-08-31 01:06:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:06:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:06:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2589 transitions. [2023-08-31 01:06:35,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3529652351738241 [2023-08-31 01:06:35,999 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2589 transitions. [2023-08-31 01:06:35,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2589 transitions. [2023-08-31 01:06:36,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:06:36,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2589 transitions. [2023-08-31 01:06:36,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 172.6) internal successors, (2589), 15 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:36,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:36,010 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:36,010 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 1486 flow. Second operand 15 states and 2589 transitions. [2023-08-31 01:06:36,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 184 transitions, 2145 flow [2023-08-31 01:06:36,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 184 transitions, 2011 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-08-31 01:06:36,041 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1780 flow [2023-08-31 01:06:36,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1780, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2023-08-31 01:06:36,042 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 109 predicate places. [2023-08-31 01:06:36,042 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1780 flow [2023-08-31 01:06:36,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 169.93333333333334) internal successors, (5098), 30 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:36,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:06:36,044 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:06:36,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 01:06:36,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 01:06:36,250 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:06:36,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:06:36,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1976346153, now seen corresponding path program 6 times [2023-08-31 01:06:36,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:06:36,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230166363] [2023-08-31 01:06:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:06:36,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:06:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:37,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:06:37,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230166363] [2023-08-31 01:06:37,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230166363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:06:37,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711561686] [2023-08-31 01:06:37,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:06:37,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:06:37,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:06:37,095 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) [2023-08-31 01:06:37,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 01:06:37,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:06:37,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:06:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:06:37,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:06:37,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:37,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:06:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:37,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:06:38,182 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:06:38,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2023-08-31 01:06:38,217 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:06:38,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:06:38,222 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:06:38,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:06:38,227 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:06:38,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-08-31 01:06:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:38,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711561686] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:06:38,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:06:38,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-31 01:06:38,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976287300] [2023-08-31 01:06:38,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:06:38,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:06:38,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:06:38,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:06:38,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:06:39,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-31 01:06:39,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1780 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:39,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:06:39,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-31 01:06:39,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:06:40,455 INFO L130 PetriNetUnfolder]: 785/1401 cut-off events. [2023-08-31 01:06:40,455 INFO L131 PetriNetUnfolder]: For 8388/8388 co-relation queries the response was YES. [2023-08-31 01:06:40,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 1401 events. 785/1401 cut-off events. For 8388/8388 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7407 event pairs, 138 based on Foata normal form. 2/1383 useless extension candidates. Maximal degree in co-relation 7451. Up to 1016 conditions per place. [2023-08-31 01:06:40,469 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 115 selfloop transitions, 73 changer transitions 4/192 dead transitions. [2023-08-31 01:06:40,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 192 transitions, 2402 flow [2023-08-31 01:06:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:06:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:06:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2562 transitions. [2023-08-31 01:06:40,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37423312883435583 [2023-08-31 01:06:40,474 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2562 transitions. [2023-08-31 01:06:40,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2562 transitions. [2023-08-31 01:06:40,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:06:40,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2562 transitions. [2023-08-31 01:06:40,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 183.0) internal successors, (2562), 14 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:40,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:40,483 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:40,483 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1780 flow. Second operand 14 states and 2562 transitions. [2023-08-31 01:06:40,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 192 transitions, 2402 flow [2023-08-31 01:06:40,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 192 transitions, 2261 flow, removed 63 selfloop flow, removed 4 redundant places. [2023-08-31 01:06:40,515 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1912 flow [2023-08-31 01:06:40,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1912, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2023-08-31 01:06:40,516 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 121 predicate places. [2023-08-31 01:06:40,516 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1912 flow [2023-08-31 01:06:40,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:40,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:06:40,517 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:06:40,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 01:06:40,727 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,SelfDestructingSolverStorable14 [2023-08-31 01:06:40,728 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:06:40,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:06:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1457835971, now seen corresponding path program 7 times [2023-08-31 01:06:40,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:06:40,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621579517] [2023-08-31 01:06:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:06:40,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:06:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:41,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:06:41,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621579517] [2023-08-31 01:06:41,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621579517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:06:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197460944] [2023-08-31 01:06:41,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:06:41,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:06:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:06:41,585 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) [2023-08-31 01:06:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 01:06:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:06:41,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:06:41,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:41,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:06:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:41,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:06:42,468 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-31 01:06:42,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 99 [2023-08-31 01:06:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:42,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197460944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:06:42,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:06:42,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-31 01:06:42,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754842571] [2023-08-31 01:06:42,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:06:42,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:06:42,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:06:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:06:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:06:43,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 489 [2023-08-31 01:06:43,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1912 flow. Second operand has 24 states, 24 states have (on average 178.04166666666666) internal successors, (4273), 24 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:43,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:06:43,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 489 [2023-08-31 01:06:43,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:06:44,689 INFO L130 PetriNetUnfolder]: 775/1409 cut-off events. [2023-08-31 01:06:44,689 INFO L131 PetriNetUnfolder]: For 8753/8753 co-relation queries the response was YES. [2023-08-31 01:06:44,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7611 conditions, 1409 events. 775/1409 cut-off events. For 8753/8753 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7619 event pairs, 152 based on Foata normal form. 14/1403 useless extension candidates. Maximal degree in co-relation 7489. Up to 1060 conditions per place. [2023-08-31 01:06:44,705 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 104 selfloop transitions, 70 changer transitions 6/180 dead transitions. [2023-08-31 01:06:44,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 180 transitions, 2378 flow [2023-08-31 01:06:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:06:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:06:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2352 transitions. [2023-08-31 01:06:44,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699858423784804 [2023-08-31 01:06:44,710 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2352 transitions. [2023-08-31 01:06:44,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2352 transitions. [2023-08-31 01:06:44,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:06:44,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2352 transitions. [2023-08-31 01:06:44,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 180.92307692307693) internal successors, (2352), 13 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:44,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:44,718 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:44,718 INFO L175 Difference]: Start difference. First operand has 144 places, 161 transitions, 1912 flow. Second operand 13 states and 2352 transitions. [2023-08-31 01:06:44,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 180 transitions, 2378 flow [2023-08-31 01:06:44,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 180 transitions, 2278 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-08-31 01:06:44,748 INFO L231 Difference]: Finished difference. Result has 150 places, 162 transitions, 1985 flow [2023-08-31 01:06:44,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1985, PETRI_PLACES=150, PETRI_TRANSITIONS=162} [2023-08-31 01:06:44,750 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 127 predicate places. [2023-08-31 01:06:44,750 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 162 transitions, 1985 flow [2023-08-31 01:06:44,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 178.04166666666666) internal successors, (4273), 24 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:44,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:06:44,751 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:06:44,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 01:06:44,959 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,SelfDestructingSolverStorable15 [2023-08-31 01:06:44,960 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:06:44,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:06:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2030000009, now seen corresponding path program 8 times [2023-08-31 01:06:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:06:44,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290424305] [2023-08-31 01:06:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:06:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:06:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:45,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:06:45,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290424305] [2023-08-31 01:06:45,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290424305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:06:45,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373276579] [2023-08-31 01:06:45,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:06:45,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:06:45,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:06:45,577 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) [2023-08-31 01:06:45,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 01:06:45,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:06:45,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:06:45,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:06:45,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:06:45,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:45,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:06:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:45,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:06:46,520 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:06:46,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-08-31 01:06:46,565 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-31 01:06:46,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-31 01:06:46,578 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:06:46,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:06:46,585 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:06:46,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:06:46,588 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-31 01:06:46,595 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:06:46,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:06:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:46,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373276579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:06:46,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:06:46,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-31 01:06:46,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858646519] [2023-08-31 01:06:46,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:06:46,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:06:46,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:06:46,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:06:46,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:06:47,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-31 01:06:47,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 162 transitions, 1985 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:47,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:06:47,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-31 01:06:47,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:06:48,240 INFO L130 PetriNetUnfolder]: 807/1457 cut-off events. [2023-08-31 01:06:48,241 INFO L131 PetriNetUnfolder]: For 9801/9801 co-relation queries the response was YES. [2023-08-31 01:06:48,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8273 conditions, 1457 events. 807/1457 cut-off events. For 9801/9801 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7893 event pairs, 166 based on Foata normal form. 2/1439 useless extension candidates. Maximal degree in co-relation 8149. Up to 1124 conditions per place. [2023-08-31 01:06:48,264 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 120 selfloop transitions, 65 changer transitions 2/187 dead transitions. [2023-08-31 01:06:48,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 187 transitions, 2556 flow [2023-08-31 01:06:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:06:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:06:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2194 transitions. [2023-08-31 01:06:48,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37389229720518063 [2023-08-31 01:06:48,267 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2194 transitions. [2023-08-31 01:06:48,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2194 transitions. [2023-08-31 01:06:48,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:06:48,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2194 transitions. [2023-08-31 01:06:48,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 182.83333333333334) internal successors, (2194), 12 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:48,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:48,277 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:48,277 INFO L175 Difference]: Start difference. First operand has 150 places, 162 transitions, 1985 flow. Second operand 12 states and 2194 transitions. [2023-08-31 01:06:48,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 187 transitions, 2556 flow [2023-08-31 01:06:48,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 187 transitions, 2405 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-08-31 01:06:48,338 INFO L231 Difference]: Finished difference. Result has 152 places, 169 transitions, 2111 flow [2023-08-31 01:06:48,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2111, PETRI_PLACES=152, PETRI_TRANSITIONS=169} [2023-08-31 01:06:48,339 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 129 predicate places. [2023-08-31 01:06:48,339 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 169 transitions, 2111 flow [2023-08-31 01:06:48,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:48,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:06:48,340 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:06:48,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 01:06:48,545 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,SelfDestructingSolverStorable16 [2023-08-31 01:06:48,545 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:06:48,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:06:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1391226607, now seen corresponding path program 9 times [2023-08-31 01:06:48,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:06:48,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599779815] [2023-08-31 01:06:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:06:48,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:06:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:06:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599779815] [2023-08-31 01:06:49,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599779815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:06:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895623514] [2023-08-31 01:06:49,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:06:49,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:06:49,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:06:49,186 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) [2023-08-31 01:06:49,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 01:06:49,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:06:49,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:06:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:06:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:06:49,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:49,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-08-31 01:06:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:49,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:06:50,043 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:06:50,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-08-31 01:06:50,079 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-31 01:06:50,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-31 01:06:50,087 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:06:50,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:06:50,093 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:06:50,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:06:50,097 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-31 01:06:50,105 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:06:50,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:06:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:50,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895623514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:06:50,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:06:50,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-31 01:06:50,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334175217] [2023-08-31 01:06:50,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:06:50,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 01:06:50,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:06:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 01:06:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-08-31 01:06:50,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-31 01:06:50,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 169 transitions, 2111 flow. Second operand has 22 states, 22 states have (on average 180.13636363636363) internal successors, (3963), 22 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:50,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:06:50,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-31 01:06:50,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:06:51,671 INFO L130 PetriNetUnfolder]: 819/1487 cut-off events. [2023-08-31 01:06:51,672 INFO L131 PetriNetUnfolder]: For 11128/11128 co-relation queries the response was YES. [2023-08-31 01:06:51,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8554 conditions, 1487 events. 819/1487 cut-off events. For 11128/11128 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8161 event pairs, 172 based on Foata normal form. 2/1469 useless extension candidates. Maximal degree in co-relation 8429. Up to 1102 conditions per place. [2023-08-31 01:06:51,684 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 121 selfloop transitions, 68 changer transitions 5/194 dead transitions. [2023-08-31 01:06:51,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 194 transitions, 2650 flow [2023-08-31 01:06:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:06:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:06:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2379 transitions. [2023-08-31 01:06:51,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37423312883435583 [2023-08-31 01:06:51,687 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2379 transitions. [2023-08-31 01:06:51,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2379 transitions. [2023-08-31 01:06:51,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:06:51,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2379 transitions. [2023-08-31 01:06:51,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:51,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:51,692 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:51,692 INFO L175 Difference]: Start difference. First operand has 152 places, 169 transitions, 2111 flow. Second operand 13 states and 2379 transitions. [2023-08-31 01:06:51,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 194 transitions, 2650 flow [2023-08-31 01:06:51,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 194 transitions, 2569 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-08-31 01:06:51,725 INFO L231 Difference]: Finished difference. Result has 160 places, 170 transitions, 2214 flow [2023-08-31 01:06:51,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2214, PETRI_PLACES=160, PETRI_TRANSITIONS=170} [2023-08-31 01:06:51,726 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2023-08-31 01:06:51,726 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 170 transitions, 2214 flow [2023-08-31 01:06:51,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 180.13636363636363) internal successors, (3963), 22 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:51,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:06:51,727 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:06:51,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 01:06:51,927 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,SelfDestructingSolverStorable17 [2023-08-31 01:06:51,928 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:06:51,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:06:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1193323809, now seen corresponding path program 10 times [2023-08-31 01:06:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:06:51,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137465205] [2023-08-31 01:06:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:06:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:06:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:52,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:06:52,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137465205] [2023-08-31 01:06:52,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137465205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:06:52,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164147562] [2023-08-31 01:06:52,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:06:52,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:06:52,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:06:52,589 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) [2023-08-31 01:06:52,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 01:06:52,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:06:52,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:06:52,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:06:52,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:06:52,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:52,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:06:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:52,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:06:53,450 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:06:53,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-08-31 01:06:53,490 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-31 01:06:53,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-31 01:06:53,504 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:06:53,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:06:53,513 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:06:53,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:06:53,516 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-31 01:06:53,524 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:06:53,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:06:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:53,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164147562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:06:53,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:06:53,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-31 01:06:53,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874024854] [2023-08-31 01:06:53,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:06:53,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:06:53,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:06:53,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:06:53,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:06:54,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-31 01:06:54,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 170 transitions, 2214 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:54,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:06:54,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-31 01:06:54,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:06:55,769 INFO L130 PetriNetUnfolder]: 871/1589 cut-off events. [2023-08-31 01:06:55,770 INFO L131 PetriNetUnfolder]: For 14009/14009 co-relation queries the response was YES. [2023-08-31 01:06:55,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9591 conditions, 1589 events. 871/1589 cut-off events. For 14009/14009 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8944 event pairs, 275 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 9463. Up to 1242 conditions per place. [2023-08-31 01:06:55,782 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 159 selfloop transitions, 46 changer transitions 5/210 dead transitions. [2023-08-31 01:06:55,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 210 transitions, 3038 flow [2023-08-31 01:06:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:06:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:06:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2198 transitions. [2023-08-31 01:06:55,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37457396046353103 [2023-08-31 01:06:55,784 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2198 transitions. [2023-08-31 01:06:55,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2198 transitions. [2023-08-31 01:06:55,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:06:55,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2198 transitions. [2023-08-31 01:06:55,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.16666666666666) internal successors, (2198), 12 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:55,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:55,792 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:55,792 INFO L175 Difference]: Start difference. First operand has 160 places, 170 transitions, 2214 flow. Second operand 12 states and 2198 transitions. [2023-08-31 01:06:55,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 210 transitions, 3038 flow [2023-08-31 01:06:55,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 210 transitions, 2865 flow, removed 17 selfloop flow, removed 12 redundant places. [2023-08-31 01:06:55,841 INFO L231 Difference]: Finished difference. Result has 163 places, 184 transitions, 2406 flow [2023-08-31 01:06:55,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2406, PETRI_PLACES=163, PETRI_TRANSITIONS=184} [2023-08-31 01:06:55,841 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 140 predicate places. [2023-08-31 01:06:55,841 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 184 transitions, 2406 flow [2023-08-31 01:06:55,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:55,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:06:55,842 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:06:55,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 01:06:56,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:06:56,053 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:06:56,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:06:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1163402759, now seen corresponding path program 11 times [2023-08-31 01:06:56,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:06:56,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180298074] [2023-08-31 01:06:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:06:56,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:06:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-31 01:06:57,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:06:57,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180298074] [2023-08-31 01:06:57,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180298074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:06:57,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252322104] [2023-08-31 01:06:57,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:06:57,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:06:57,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:06:57,433 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) [2023-08-31 01:06:57,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 01:06:57,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:06:57,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:06:57,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-31 01:06:57,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:06:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:06:57,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:06:57,923 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:06:57,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-31 01:06:58,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:58,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:06:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:58,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:06:58,503 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (< c_~result_5~0 0)) (.cse1 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (= (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset))))) (.cse0 (< 0 c_~result_5~0))) (and (or (and (or .cse0 .cse1) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse2 (select (select .cse4 c_~o_2~0.base) c_~o_2~0.offset)) (.cse3 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse2 .cse3) (= .cse2 .cse3)))))) .cse5) (or (= c_~result_5~0 0) (and (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse7 (select (select .cse8 c_~o_2~0.base) c_~o_2~0.offset)) (.cse6 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse6 .cse7) (< .cse7 .cse6))))) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse9 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset)))) .cse5) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse10 c_~o_2~0.base) c_~o_2~0.offset)))) .cse0))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 5) .cse1) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse12 (select (select .cse13 c_~o_2~0.base) c_~o_2~0.offset)) (.cse11 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse11 .cse12) (= .cse12 .cse11))))) .cse0))) is different from false [2023-08-31 01:06:58,597 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~o_2~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (let ((.cse2 (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse0)) (.cse6 (< .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (.cse8 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (= (select (select .cse15 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)))))) (and (or (= .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (and (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse1 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))) .cse2) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse4 (select (select .cse5 c_~o_2~0.base) c_~o_2~0.offset)) (.cse3 (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse3 .cse4) (< .cse4 .cse3))))) (or .cse6 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse7 c_~o_2~0.base) c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) .cse8) (or .cse6 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse10 (select (select .cse11 c_~o_2~0.base) c_~o_2~0.offset)) (.cse9 (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse9 .cse10) (= .cse10 .cse9)))))) (or .cse2 (and (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse12 (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset)) (.cse13 (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse12 .cse13) (= .cse12 .cse13))))) (or .cse6 .cse8)))))) is different from false [2023-08-31 01:06:58,685 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-31 01:06:58,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 322 treesize of output 263 [2023-08-31 01:06:58,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:58,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 207 [2023-08-31 01:06:58,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:58,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 199 [2023-08-31 01:06:58,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:06:58,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 183 [2023-08-31 01:06:59,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:06:59,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:06:59,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2023-08-31 01:06:59,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:06:59,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2023-08-31 01:06:59,425 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-08-31 01:06:59,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 1 [2023-08-31 01:06:59,440 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-08-31 01:06:59,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 1 [2023-08-31 01:06:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:06:59,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252322104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:06:59,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:06:59,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 38 [2023-08-31 01:06:59,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373962065] [2023-08-31 01:06:59,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:06:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-31 01:06:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:06:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-31 01:06:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1260, Unknown=2, NotChecked=146, Total=1560 [2023-08-31 01:06:59,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 489 [2023-08-31 01:06:59,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 184 transitions, 2406 flow. Second operand has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:59,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:06:59,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 489 [2023-08-31 01:06:59,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:02,447 INFO L130 PetriNetUnfolder]: 1013/1857 cut-off events. [2023-08-31 01:07:02,447 INFO L131 PetriNetUnfolder]: For 18945/18945 co-relation queries the response was YES. [2023-08-31 01:07:02,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11467 conditions, 1857 events. 1013/1857 cut-off events. For 18945/18945 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 10909 event pairs, 116 based on Foata normal form. 12/1869 useless extension candidates. Maximal degree in co-relation 11337. Up to 508 conditions per place. [2023-08-31 01:07:02,460 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 125 selfloop transitions, 115 changer transitions 18/258 dead transitions. [2023-08-31 01:07:02,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 258 transitions, 3628 flow [2023-08-31 01:07:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 01:07:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 01:07:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3448 transitions. [2023-08-31 01:07:02,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2820449897750511 [2023-08-31 01:07:02,464 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3448 transitions. [2023-08-31 01:07:02,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3448 transitions. [2023-08-31 01:07:02,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:02,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3448 transitions. [2023-08-31 01:07:02,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 137.92) internal successors, (3448), 25 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:02,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:02,477 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:02,477 INFO L175 Difference]: Start difference. First operand has 163 places, 184 transitions, 2406 flow. Second operand 25 states and 3448 transitions. [2023-08-31 01:07:02,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 258 transitions, 3628 flow [2023-08-31 01:07:02,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 258 transitions, 3520 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-08-31 01:07:02,532 INFO L231 Difference]: Finished difference. Result has 190 places, 194 transitions, 2849 flow [2023-08-31 01:07:02,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2849, PETRI_PLACES=190, PETRI_TRANSITIONS=194} [2023-08-31 01:07:02,533 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 167 predicate places. [2023-08-31 01:07:02,533 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 194 transitions, 2849 flow [2023-08-31 01:07:02,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:02,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:02,534 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:02,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:02,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:02,735 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:02,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:02,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2033547511, now seen corresponding path program 12 times [2023-08-31 01:07:02,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:02,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123893777] [2023-08-31 01:07:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:02,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:03,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123893777] [2023-08-31 01:07:03,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123893777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382899772] [2023-08-31 01:07:03,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:07:03,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:03,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:03,349 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) [2023-08-31 01:07:03,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 01:07:03,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:07:03,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:07:03,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:03,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:03,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:07:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:03,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:04,029 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-31 01:07:04,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 103 [2023-08-31 01:07:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:04,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382899772] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:04,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:04,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-31 01:07:04,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14465193] [2023-08-31 01:07:04,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:04,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:07:04,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:07:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:07:05,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-31 01:07:05,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 194 transitions, 2849 flow. Second operand has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:05,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:05,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-31 01:07:05,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:05,894 INFO L130 PetriNetUnfolder]: 1051/1915 cut-off events. [2023-08-31 01:07:05,894 INFO L131 PetriNetUnfolder]: For 25632/25632 co-relation queries the response was YES. [2023-08-31 01:07:05,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12966 conditions, 1915 events. 1051/1915 cut-off events. For 25632/25632 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11235 event pairs, 352 based on Foata normal form. 6/1921 useless extension candidates. Maximal degree in co-relation 12818. Up to 1562 conditions per place. [2023-08-31 01:07:05,911 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 174 selfloop transitions, 53 changer transitions 11/238 dead transitions. [2023-08-31 01:07:05,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 238 transitions, 3893 flow [2023-08-31 01:07:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:07:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:07:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2545 transitions. [2023-08-31 01:07:05,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37174992696465087 [2023-08-31 01:07:05,921 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2545 transitions. [2023-08-31 01:07:05,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2545 transitions. [2023-08-31 01:07:05,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:05,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2545 transitions. [2023-08-31 01:07:05,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 181.78571428571428) internal successors, (2545), 14 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:05,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:05,930 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:05,930 INFO L175 Difference]: Start difference. First operand has 190 places, 194 transitions, 2849 flow. Second operand 14 states and 2545 transitions. [2023-08-31 01:07:05,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 238 transitions, 3893 flow [2023-08-31 01:07:06,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 238 transitions, 3693 flow, removed 40 selfloop flow, removed 16 redundant places. [2023-08-31 01:07:06,023 INFO L231 Difference]: Finished difference. Result has 191 places, 207 transitions, 3098 flow [2023-08-31 01:07:06,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3098, PETRI_PLACES=191, PETRI_TRANSITIONS=207} [2023-08-31 01:07:06,024 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 168 predicate places. [2023-08-31 01:07:06,024 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 207 transitions, 3098 flow [2023-08-31 01:07:06,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:06,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:06,025 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:06,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:06,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:06,232 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:06,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2027142943, now seen corresponding path program 13 times [2023-08-31 01:07:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:06,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815636490] [2023-08-31 01:07:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:06,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:06,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815636490] [2023-08-31 01:07:06,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815636490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:06,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959325856] [2023-08-31 01:07:06,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:07:06,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:06,930 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) [2023-08-31 01:07:06,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 01:07:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 01:07:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:07,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:07:07,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:07:07,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:07,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:07:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:07,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:08,111 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (let ((.cse2 (select .cse0 .cse3))) (or (< (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse2) (= .cse2 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse6 (select .cse7 ~o_2~0.base))) (let ((.cse4 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset)) (.cse5 (select .cse6 c_~o_2~0.offset))) (or (< .cse4 .cse5) (< (select .cse6 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse4 .cse5)))))) (or (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (= (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset)))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse11 (select .cse12 ~o_2~0.base))) (let ((.cse10 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse9 (select .cse11 c_~o_2~0.offset))) (or (< .cse9 .cse10) (= .cse10 .cse9) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse11 .cse3))))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse14 (select .cse13 ~o_2~0.base))) (let ((.cse15 (select .cse14 .cse3))) (or (< (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select .cse14 c_~o_2~0.offset)) (< .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))))) is different from false [2023-08-31 01:07:08,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:08,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 160 [2023-08-31 01:07:08,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:08,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 84 [2023-08-31 01:07:08,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 01:07:08,627 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:07:08,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-31 01:07:08,628 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 01:07:08,631 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:07:08,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-31 01:07:08,636 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 01:07:08,645 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:07:08,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-31 01:07:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:08,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959325856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:08,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:08,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-31 01:07:08,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461417904] [2023-08-31 01:07:08,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:08,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:07:08,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:08,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:07:08,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=816, Unknown=1, NotChecked=58, Total=992 [2023-08-31 01:07:08,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 489 [2023-08-31 01:07:08,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 207 transitions, 3098 flow. Second operand has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:08,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:08,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 489 [2023-08-31 01:07:08,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:10,444 INFO L130 PetriNetUnfolder]: 1127/2039 cut-off events. [2023-08-31 01:07:10,444 INFO L131 PetriNetUnfolder]: For 29082/29082 co-relation queries the response was YES. [2023-08-31 01:07:10,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14543 conditions, 2039 events. 1127/2039 cut-off events. For 29082/29082 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11969 event pairs, 241 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 14410. Up to 1568 conditions per place. [2023-08-31 01:07:10,466 INFO L137 encePairwiseOnDemand]: 475/489 looper letters, 139 selfloop transitions, 121 changer transitions 3/263 dead transitions. [2023-08-31 01:07:10,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 263 transitions, 4420 flow [2023-08-31 01:07:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:07:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:07:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2264 transitions. [2023-08-31 01:07:10,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307040607654105 [2023-08-31 01:07:10,472 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2264 transitions. [2023-08-31 01:07:10,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2264 transitions. [2023-08-31 01:07:10,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:10,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2264 transitions. [2023-08-31 01:07:10,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.71428571428572) internal successors, (2264), 14 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:10,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:10,482 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:10,482 INFO L175 Difference]: Start difference. First operand has 191 places, 207 transitions, 3098 flow. Second operand 14 states and 2264 transitions. [2023-08-31 01:07:10,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 263 transitions, 4420 flow [2023-08-31 01:07:10,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 263 transitions, 4197 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-08-31 01:07:10,591 INFO L231 Difference]: Finished difference. Result has 198 places, 241 transitions, 3899 flow [2023-08-31 01:07:10,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3899, PETRI_PLACES=198, PETRI_TRANSITIONS=241} [2023-08-31 01:07:10,592 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 175 predicate places. [2023-08-31 01:07:10,592 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 241 transitions, 3899 flow [2023-08-31 01:07:10,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:10,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:10,595 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:10,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:10,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:10,804 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:10,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:10,804 INFO L85 PathProgramCache]: Analyzing trace with hash -797449613, now seen corresponding path program 14 times [2023-08-31 01:07:10,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:10,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956345087] [2023-08-31 01:07:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:10,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:11,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956345087] [2023-08-31 01:07:11,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956345087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515423571] [2023-08-31 01:07:11,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:07:11,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:11,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:11,385 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) [2023-08-31 01:07:11,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 01:07:11,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:07:11,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:11,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:07:11,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:11,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:11,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:07:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:11,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:12,117 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:07:12,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 71 [2023-08-31 01:07:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:12,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515423571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:12,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:12,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-08-31 01:07:12,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276697398] [2023-08-31 01:07:12,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:12,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:07:12,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:12,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:07:12,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:07:12,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-31 01:07:12,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 241 transitions, 3899 flow. Second operand has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:12,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:12,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-31 01:07:12,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:14,097 INFO L130 PetriNetUnfolder]: 1313/2381 cut-off events. [2023-08-31 01:07:14,097 INFO L131 PetriNetUnfolder]: For 34957/34957 co-relation queries the response was YES. [2023-08-31 01:07:14,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17828 conditions, 2381 events. 1313/2381 cut-off events. For 34957/34957 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 14652 event pairs, 139 based on Foata normal form. 2/2383 useless extension candidates. Maximal degree in co-relation 17692. Up to 866 conditions per place. [2023-08-31 01:07:14,118 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 202 selfloop transitions, 120 changer transitions 10/332 dead transitions. [2023-08-31 01:07:14,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 332 transitions, 5886 flow [2023-08-31 01:07:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:07:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:07:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2750 transitions. [2023-08-31 01:07:14,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37491479209270623 [2023-08-31 01:07:14,122 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2750 transitions. [2023-08-31 01:07:14,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2750 transitions. [2023-08-31 01:07:14,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:14,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2750 transitions. [2023-08-31 01:07:14,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.33333333333334) internal successors, (2750), 15 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:14,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:14,131 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:14,131 INFO L175 Difference]: Start difference. First operand has 198 places, 241 transitions, 3899 flow. Second operand 15 states and 2750 transitions. [2023-08-31 01:07:14,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 332 transitions, 5886 flow [2023-08-31 01:07:14,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 332 transitions, 5629 flow, removed 30 selfloop flow, removed 10 redundant places. [2023-08-31 01:07:14,248 INFO L231 Difference]: Finished difference. Result has 205 places, 271 transitions, 4664 flow [2023-08-31 01:07:14,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3678, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4664, PETRI_PLACES=205, PETRI_TRANSITIONS=271} [2023-08-31 01:07:14,249 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 182 predicate places. [2023-08-31 01:07:14,249 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 271 transitions, 4664 flow [2023-08-31 01:07:14,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:14,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:14,250 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:14,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:14,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:14,450 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:14,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1548093533, now seen corresponding path program 15 times [2023-08-31 01:07:14,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:14,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594216720] [2023-08-31 01:07:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:14,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:15,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:15,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594216720] [2023-08-31 01:07:15,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594216720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:15,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212305931] [2023-08-31 01:07:15,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:07:15,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:15,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:15,111 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) [2023-08-31 01:07:15,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 01:07:15,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:07:15,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-31 01:07:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:15,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:07:15,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:07:15,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:15,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:07:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:15,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:16,302 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse0 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse1 (select .cse2 c_~o_2~0.offset))) (or (< .cse0 .cse1) (< (select .cse2 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse0 .cse1)))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse5 (select .cse6 ~o_2~0.base))) (let ((.cse7 (select .cse5 .cse3))) (or (< (select .cse5 c_~o_2~0.offset) (select (select .cse6 c_~o_0~0.base) c_~o_0~0.offset)) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse7) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse7)))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (= (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse11 (select .cse12 ~o_2~0.base))) (let ((.cse10 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse9 (select .cse11 c_~o_2~0.offset))) (or (< .cse9 .cse10) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse11 .cse3)) (= .cse10 .cse9)))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse14 (select .cse13 ~o_2~0.base))) (let ((.cse15 (select .cse14 .cse3))) (or (< (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select .cse14 c_~o_2~0.offset)) (< .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse15)))))))) is different from false [2023-08-31 01:07:16,321 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-31 01:07:16,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2023-08-31 01:07:16,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:16,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-08-31 01:07:16,392 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-31 01:07:16,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 173 [2023-08-31 01:07:16,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:16,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 118 [2023-08-31 01:07:16,998 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 01:07:17,001 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:07:17,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-31 01:07:17,003 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 01:07:17,006 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:07:17,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-31 01:07:17,008 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 01:07:17,011 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:07:17,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-31 01:07:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:17,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212305931] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:17,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:17,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-31 01:07:17,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363747819] [2023-08-31 01:07:17,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:17,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:07:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:17,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:07:17,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=816, Unknown=1, NotChecked=58, Total=992 [2023-08-31 01:07:17,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 489 [2023-08-31 01:07:17,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 271 transitions, 4664 flow. Second operand has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:17,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:17,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 489 [2023-08-31 01:07:17,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:18,383 INFO L130 PetriNetUnfolder]: 1313/2379 cut-off events. [2023-08-31 01:07:18,383 INFO L131 PetriNetUnfolder]: For 36460/36460 co-relation queries the response was YES. [2023-08-31 01:07:18,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18690 conditions, 2379 events. 1313/2379 cut-off events. For 36460/36460 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14455 event pairs, 287 based on Foata normal form. 2/2381 useless extension candidates. Maximal degree in co-relation 18554. Up to 1762 conditions per place. [2023-08-31 01:07:18,441 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 167 selfloop transitions, 129 changer transitions 5/301 dead transitions. [2023-08-31 01:07:18,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 301 transitions, 5521 flow [2023-08-31 01:07:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:07:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:07:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2265 transitions. [2023-08-31 01:07:18,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3308501314636284 [2023-08-31 01:07:18,444 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2265 transitions. [2023-08-31 01:07:18,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2265 transitions. [2023-08-31 01:07:18,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:18,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2265 transitions. [2023-08-31 01:07:18,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.78571428571428) internal successors, (2265), 14 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:18,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:18,451 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:18,452 INFO L175 Difference]: Start difference. First operand has 205 places, 271 transitions, 4664 flow. Second operand 14 states and 2265 transitions. [2023-08-31 01:07:18,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 301 transitions, 5521 flow [2023-08-31 01:07:18,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 301 transitions, 4984 flow, removed 183 selfloop flow, removed 13 redundant places. [2023-08-31 01:07:18,560 INFO L231 Difference]: Finished difference. Result has 206 places, 272 transitions, 4454 flow [2023-08-31 01:07:18,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4454, PETRI_PLACES=206, PETRI_TRANSITIONS=272} [2023-08-31 01:07:18,561 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 183 predicate places. [2023-08-31 01:07:18,561 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 272 transitions, 4454 flow [2023-08-31 01:07:18,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:18,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:18,562 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:18,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:18,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:18,763 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:18,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash -308879501, now seen corresponding path program 16 times [2023-08-31 01:07:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:18,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543903410] [2023-08-31 01:07:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:19,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:19,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543903410] [2023-08-31 01:07:19,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543903410] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:19,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730493965] [2023-08-31 01:07:19,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:07:19,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:19,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:19,341 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) [2023-08-31 01:07:19,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 01:07:19,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:07:19,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:19,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:07:19,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:19,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:19,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:07:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:19,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:20,127 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:07:20,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-08-31 01:07:20,156 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-31 01:07:20,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-31 01:07:20,165 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:07:20,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:07:20,171 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:07:20,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:07:20,174 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-31 01:07:20,181 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:07:20,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:07:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:20,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730493965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:20,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:20,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-31 01:07:20,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324091166] [2023-08-31 01:07:20,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:20,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:07:20,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:20,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:07:20,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:07:21,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-31 01:07:21,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 272 transitions, 4454 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:21,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:21,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-31 01:07:21,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:22,010 INFO L130 PetriNetUnfolder]: 1329/2421 cut-off events. [2023-08-31 01:07:22,010 INFO L131 PetriNetUnfolder]: For 32125/32125 co-relation queries the response was YES. [2023-08-31 01:07:22,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17786 conditions, 2421 events. 1329/2421 cut-off events. For 32125/32125 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 14889 event pairs, 437 based on Foata normal form. 2/2423 useless extension candidates. Maximal degree in co-relation 17654. Up to 2078 conditions per place. [2023-08-31 01:07:22,027 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 251 selfloop transitions, 55 changer transitions 2/308 dead transitions. [2023-08-31 01:07:22,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 308 transitions, 5480 flow [2023-08-31 01:07:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:07:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:07:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2377 transitions. [2023-08-31 01:07:22,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739185150228095 [2023-08-31 01:07:22,031 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2377 transitions. [2023-08-31 01:07:22,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2377 transitions. [2023-08-31 01:07:22,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:22,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2377 transitions. [2023-08-31 01:07:22,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.84615384615384) internal successors, (2377), 13 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:22,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:22,038 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:22,038 INFO L175 Difference]: Start difference. First operand has 206 places, 272 transitions, 4454 flow. Second operand 13 states and 2377 transitions. [2023-08-31 01:07:22,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 308 transitions, 5480 flow [2023-08-31 01:07:22,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 308 transitions, 5184 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-08-31 01:07:22,137 INFO L231 Difference]: Finished difference. Result has 208 places, 282 transitions, 4533 flow [2023-08-31 01:07:22,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4533, PETRI_PLACES=208, PETRI_TRANSITIONS=282} [2023-08-31 01:07:22,138 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 185 predicate places. [2023-08-31 01:07:22,138 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 282 transitions, 4533 flow [2023-08-31 01:07:22,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:22,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:22,139 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:22,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:22,340 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,SelfDestructingSolverStorable24 [2023-08-31 01:07:22,340 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:22,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash 702796357, now seen corresponding path program 17 times [2023-08-31 01:07:22,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:22,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239915034] [2023-08-31 01:07:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:22,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:22,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:22,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239915034] [2023-08-31 01:07:22,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239915034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:22,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556367057] [2023-08-31 01:07:22,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:07:22,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:22,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:22,851 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) [2023-08-31 01:07:22,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 01:07:23,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:07:23,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:23,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 01:07:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:23,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:23,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-08-31 01:07:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:23,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:23,521 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-31 01:07:23,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 99 [2023-08-31 01:07:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:23,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556367057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:23,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:23,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-08-31 01:07:23,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912339294] [2023-08-31 01:07:23,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:23,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:07:23,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:07:23,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:07:24,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-31 01:07:24,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 282 transitions, 4533 flow. Second operand has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:24,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:24,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-31 01:07:24,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:25,456 INFO L130 PetriNetUnfolder]: 1327/2429 cut-off events. [2023-08-31 01:07:25,456 INFO L131 PetriNetUnfolder]: For 33077/33077 co-relation queries the response was YES. [2023-08-31 01:07:25,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17867 conditions, 2429 events. 1327/2429 cut-off events. For 33077/33077 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15025 event pairs, 445 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 17734. Up to 2056 conditions per place. [2023-08-31 01:07:25,474 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 238 selfloop transitions, 68 changer transitions 2/308 dead transitions. [2023-08-31 01:07:25,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 308 transitions, 5378 flow [2023-08-31 01:07:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:07:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:07:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2374 transitions. [2023-08-31 01:07:25,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37344659430549 [2023-08-31 01:07:25,477 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2374 transitions. [2023-08-31 01:07:25,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2374 transitions. [2023-08-31 01:07:25,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:25,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2374 transitions. [2023-08-31 01:07:25,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.6153846153846) internal successors, (2374), 13 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:25,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:25,485 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:25,485 INFO L175 Difference]: Start difference. First operand has 208 places, 282 transitions, 4533 flow. Second operand 13 states and 2374 transitions. [2023-08-31 01:07:25,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 308 transitions, 5378 flow [2023-08-31 01:07:25,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 308 transitions, 5203 flow, removed 57 selfloop flow, removed 7 redundant places. [2023-08-31 01:07:25,585 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 4598 flow [2023-08-31 01:07:25,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4598, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2023-08-31 01:07:25,585 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 192 predicate places. [2023-08-31 01:07:25,586 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 4598 flow [2023-08-31 01:07:25,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:25,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:25,586 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:25,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:25,787 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,SelfDestructingSolverStorable25 [2023-08-31 01:07:25,787 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:25,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash -347288759, now seen corresponding path program 18 times [2023-08-31 01:07:25,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:25,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944118819] [2023-08-31 01:07:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:26,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:26,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944118819] [2023-08-31 01:07:26,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944118819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:26,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208604082] [2023-08-31 01:07:26,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:07:26,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:26,367 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) [2023-08-31 01:07:26,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 01:07:26,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:07:26,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:26,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:07:26,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:26,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:26,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-31 01:07:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:26,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:27,150 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:07:27,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-08-31 01:07:27,178 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-31 01:07:27,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-31 01:07:27,186 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:07:27,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:07:27,192 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:07:27,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:07:27,194 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-31 01:07:27,201 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-31 01:07:27,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-31 01:07:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:27,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208604082] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:27,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:27,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-31 01:07:27,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539251347] [2023-08-31 01:07:27,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:27,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:07:27,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:27,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:07:27,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:07:28,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-31 01:07:28,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 4598 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:28,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:28,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-31 01:07:28,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:29,270 INFO L130 PetriNetUnfolder]: 1327/2427 cut-off events. [2023-08-31 01:07:29,270 INFO L131 PetriNetUnfolder]: For 32331/32331 co-relation queries the response was YES. [2023-08-31 01:07:29,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17875 conditions, 2427 events. 1327/2427 cut-off events. For 32331/32331 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15041 event pairs, 435 based on Foata normal form. 2/2429 useless extension candidates. Maximal degree in co-relation 17740. Up to 2054 conditions per place. [2023-08-31 01:07:29,288 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 257 selfloop transitions, 56 changer transitions 3/316 dead transitions. [2023-08-31 01:07:29,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 316 transitions, 5472 flow [2023-08-31 01:07:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:07:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:07:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2199 transitions. [2023-08-31 01:07:29,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37474437627811863 [2023-08-31 01:07:29,291 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2199 transitions. [2023-08-31 01:07:29,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2199 transitions. [2023-08-31 01:07:29,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:29,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2199 transitions. [2023-08-31 01:07:29,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.25) internal successors, (2199), 12 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:29,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:29,297 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:29,297 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 4598 flow. Second operand 12 states and 2199 transitions. [2023-08-31 01:07:29,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 316 transitions, 5472 flow [2023-08-31 01:07:29,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 316 transitions, 5304 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-08-31 01:07:29,408 INFO L231 Difference]: Finished difference. Result has 217 places, 288 transitions, 4611 flow [2023-08-31 01:07:29,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4430, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4611, PETRI_PLACES=217, PETRI_TRANSITIONS=288} [2023-08-31 01:07:29,409 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 194 predicate places. [2023-08-31 01:07:29,409 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 288 transitions, 4611 flow [2023-08-31 01:07:29,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:29,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:29,410 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:29,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:29,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 01:07:29,611 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:29,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:29,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1754254317, now seen corresponding path program 19 times [2023-08-31 01:07:29,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:29,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649924012] [2023-08-31 01:07:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:29,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:30,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:30,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649924012] [2023-08-31 01:07:30,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649924012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:30,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723011665] [2023-08-31 01:07:30,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:07:30,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:30,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:30,373 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) [2023-08-31 01:07:30,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 01:07:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:30,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:07:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:30,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:30,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:07:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:30,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:31,055 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:07:31,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:07:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:31,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723011665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:31,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:31,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:07:31,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891733036] [2023-08-31 01:07:31,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:31,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:07:31,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:31,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:07:31,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:07:31,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:07:31,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 288 transitions, 4611 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:31,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:31,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:07:31,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:32,658 INFO L130 PetriNetUnfolder]: 1389/2543 cut-off events. [2023-08-31 01:07:32,658 INFO L131 PetriNetUnfolder]: For 35006/35006 co-relation queries the response was YES. [2023-08-31 01:07:32,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18640 conditions, 2543 events. 1389/2543 cut-off events. For 35006/35006 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 16040 event pairs, 249 based on Foata normal form. 8/2551 useless extension candidates. Maximal degree in co-relation 18504. Up to 781 conditions per place. [2023-08-31 01:07:32,680 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 252 selfloop transitions, 145 changer transitions 3/400 dead transitions. [2023-08-31 01:07:32,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 400 transitions, 6788 flow [2023-08-31 01:07:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:07:32,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:07:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2798 transitions. [2023-08-31 01:07:32,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814587593728698 [2023-08-31 01:07:32,683 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2798 transitions. [2023-08-31 01:07:32,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2798 transitions. [2023-08-31 01:07:32,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:32,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2798 transitions. [2023-08-31 01:07:32,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 186.53333333333333) internal successors, (2798), 15 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:32,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:32,689 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:32,689 INFO L175 Difference]: Start difference. First operand has 217 places, 288 transitions, 4611 flow. Second operand 15 states and 2798 transitions. [2023-08-31 01:07:32,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 400 transitions, 6788 flow [2023-08-31 01:07:32,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 400 transitions, 6623 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-08-31 01:07:32,801 INFO L231 Difference]: Finished difference. Result has 224 places, 301 transitions, 4950 flow [2023-08-31 01:07:32,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4950, PETRI_PLACES=224, PETRI_TRANSITIONS=301} [2023-08-31 01:07:32,802 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 201 predicate places. [2023-08-31 01:07:32,802 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 301 transitions, 4950 flow [2023-08-31 01:07:32,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:32,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:32,803 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:32,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:33,007 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:33,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1070556359, now seen corresponding path program 20 times [2023-08-31 01:07:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:33,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739582624] [2023-08-31 01:07:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:33,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:33,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739582624] [2023-08-31 01:07:33,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739582624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:33,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466379530] [2023-08-31 01:07:33,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:07:33,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:33,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:33,734 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) [2023-08-31 01:07:33,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 01:07:33,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:07:33,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:07:33,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:34,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:34,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-31 01:07:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:34,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:34,264 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:07:34,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:07:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:34,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466379530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:34,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:34,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-31 01:07:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387717823] [2023-08-31 01:07:34,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:34,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:07:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:34,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:07:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:07:35,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:07:35,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 301 transitions, 4950 flow. Second operand has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:35,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:35,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:07:35,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:36,942 INFO L130 PetriNetUnfolder]: 1481/2691 cut-off events. [2023-08-31 01:07:36,942 INFO L131 PetriNetUnfolder]: For 38086/38086 co-relation queries the response was YES. [2023-08-31 01:07:36,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20348 conditions, 2691 events. 1481/2691 cut-off events. For 38086/38086 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17002 event pairs, 256 based on Foata normal form. 8/2699 useless extension candidates. Maximal degree in co-relation 20210. Up to 931 conditions per place. [2023-08-31 01:07:36,967 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 231 selfloop transitions, 184 changer transitions 8/423 dead transitions. [2023-08-31 01:07:36,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 423 transitions, 7380 flow [2023-08-31 01:07:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:07:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:07:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4072 transitions. [2023-08-31 01:07:36,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37850901654582636 [2023-08-31 01:07:36,971 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4072 transitions. [2023-08-31 01:07:36,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4072 transitions. [2023-08-31 01:07:36,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:36,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4072 transitions. [2023-08-31 01:07:36,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 185.0909090909091) internal successors, (4072), 22 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:36,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:36,984 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:36,984 INFO L175 Difference]: Start difference. First operand has 224 places, 301 transitions, 4950 flow. Second operand 22 states and 4072 transitions. [2023-08-31 01:07:36,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 423 transitions, 7380 flow [2023-08-31 01:07:37,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 423 transitions, 7157 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-08-31 01:07:37,136 INFO L231 Difference]: Finished difference. Result has 244 places, 338 transitions, 5752 flow [2023-08-31 01:07:37,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5752, PETRI_PLACES=244, PETRI_TRANSITIONS=338} [2023-08-31 01:07:37,137 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 221 predicate places. [2023-08-31 01:07:37,137 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 338 transitions, 5752 flow [2023-08-31 01:07:37,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:37,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:37,138 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:37,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:37,341 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,SelfDestructingSolverStorable28 [2023-08-31 01:07:37,341 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:37,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:37,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1477706161, now seen corresponding path program 21 times [2023-08-31 01:07:37,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:37,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269152316] [2023-08-31 01:07:37,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:37,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:37,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:37,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269152316] [2023-08-31 01:07:37,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269152316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:37,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901958572] [2023-08-31 01:07:37,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:07:37,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:37,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:37,940 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) [2023-08-31 01:07:37,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 01:07:38,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:07:38,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 01:07:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:38,389 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:07:38,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:07:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:38,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:38,679 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:07:38,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-08-31 01:07:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:38,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901958572] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:38,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:38,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2023-08-31 01:07:38,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053418331] [2023-08-31 01:07:38,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:07:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:07:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:07:39,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-31 01:07:39,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 338 transitions, 5752 flow. Second operand has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:39,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:39,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-31 01:07:39,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:41,131 INFO L130 PetriNetUnfolder]: 1707/3101 cut-off events. [2023-08-31 01:07:41,132 INFO L131 PetriNetUnfolder]: For 47341/47341 co-relation queries the response was YES. [2023-08-31 01:07:41,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24676 conditions, 3101 events. 1707/3101 cut-off events. For 47341/47341 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 20201 event pairs, 238 based on Foata normal form. 12/3113 useless extension candidates. Maximal degree in co-relation 24534. Up to 2104 conditions per place. [2023-08-31 01:07:41,158 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 220 selfloop transitions, 259 changer transitions 1/480 dead transitions. [2023-08-31 01:07:41,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 480 transitions, 8806 flow [2023-08-31 01:07:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:07:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:07:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4181 transitions. [2023-08-31 01:07:41,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37174357606472835 [2023-08-31 01:07:41,161 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4181 transitions. [2023-08-31 01:07:41,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4181 transitions. [2023-08-31 01:07:41,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:41,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4181 transitions. [2023-08-31 01:07:41,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 181.7826086956522) internal successors, (4181), 23 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:41,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 489.0) internal successors, (11736), 24 states have internal predecessors, (11736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:41,173 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 489.0) internal successors, (11736), 24 states have internal predecessors, (11736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:41,174 INFO L175 Difference]: Start difference. First operand has 244 places, 338 transitions, 5752 flow. Second operand 23 states and 4181 transitions. [2023-08-31 01:07:41,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 480 transitions, 8806 flow [2023-08-31 01:07:41,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 480 transitions, 8611 flow, removed 55 selfloop flow, removed 6 redundant places. [2023-08-31 01:07:41,360 INFO L231 Difference]: Finished difference. Result has 265 places, 433 transitions, 8165 flow [2023-08-31 01:07:41,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8165, PETRI_PLACES=265, PETRI_TRANSITIONS=433} [2023-08-31 01:07:41,361 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 242 predicate places. [2023-08-31 01:07:41,361 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 433 transitions, 8165 flow [2023-08-31 01:07:41,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:41,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:41,362 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:41,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:41,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:41,563 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:41,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:41,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1048299191, now seen corresponding path program 22 times [2023-08-31 01:07:41,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:41,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501734588] [2023-08-31 01:07:41,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:41,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:42,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:42,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501734588] [2023-08-31 01:07:42,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501734588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:42,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912112000] [2023-08-31 01:07:42,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:07:42,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:42,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:42,150 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) [2023-08-31 01:07:42,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 01:07:42,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:07:42,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:07:42,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:42,484 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:07:42,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 32 [2023-08-31 01:07:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:42,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:42,658 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:07:42,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:07:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:42,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912112000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:42,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:42,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:07:42,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19319065] [2023-08-31 01:07:42,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:42,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:07:42,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:07:42,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:07:43,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:07:43,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 433 transitions, 8165 flow. Second operand has 19 states, 19 states have (on average 182.26315789473685) internal successors, (3463), 19 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:43,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:43,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:07:43,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:44,429 INFO L130 PetriNetUnfolder]: 1711/3113 cut-off events. [2023-08-31 01:07:44,429 INFO L131 PetriNetUnfolder]: For 55419/55419 co-relation queries the response was YES. [2023-08-31 01:07:44,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26893 conditions, 3113 events. 1711/3113 cut-off events. For 55419/55419 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 20397 event pairs, 437 based on Foata normal form. 8/3121 useless extension candidates. Maximal degree in co-relation 26744. Up to 2215 conditions per place. [2023-08-31 01:07:44,458 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 216 selfloop transitions, 241 changer transitions 12/469 dead transitions. [2023-08-31 01:07:44,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 469 transitions, 9516 flow [2023-08-31 01:07:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:07:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:07:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2045 transitions. [2023-08-31 01:07:44,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3801821899981409 [2023-08-31 01:07:44,460 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2045 transitions. [2023-08-31 01:07:44,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2045 transitions. [2023-08-31 01:07:44,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:44,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2045 transitions. [2023-08-31 01:07:44,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.9090909090909) internal successors, (2045), 11 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:44,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:44,464 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:44,464 INFO L175 Difference]: Start difference. First operand has 265 places, 433 transitions, 8165 flow. Second operand 11 states and 2045 transitions. [2023-08-31 01:07:44,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 469 transitions, 9516 flow [2023-08-31 01:07:44,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 469 transitions, 9085 flow, removed 118 selfloop flow, removed 9 redundant places. [2023-08-31 01:07:44,715 INFO L231 Difference]: Finished difference. Result has 269 places, 436 transitions, 8440 flow [2023-08-31 01:07:44,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=7774, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8440, PETRI_PLACES=269, PETRI_TRANSITIONS=436} [2023-08-31 01:07:44,716 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 246 predicate places. [2023-08-31 01:07:44,716 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 436 transitions, 8440 flow [2023-08-31 01:07:44,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.26315789473685) internal successors, (3463), 19 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:44,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:44,717 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:44,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:44,917 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,SelfDestructingSolverStorable30 [2023-08-31 01:07:44,918 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:44,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:44,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1007976255, now seen corresponding path program 23 times [2023-08-31 01:07:44,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:44,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917801698] [2023-08-31 01:07:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:45,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:45,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917801698] [2023-08-31 01:07:45,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917801698] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:45,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032050178] [2023-08-31 01:07:45,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:07:45,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:45,420 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) [2023-08-31 01:07:45,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 01:07:45,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:07:45,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:45,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:07:45,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:45,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:45,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:07:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:45,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:45,964 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:07:45,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:07:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:45,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032050178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:45,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:45,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:07:45,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65528260] [2023-08-31 01:07:45,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:45,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:07:45,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:45,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:07:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:07:46,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:07:46,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 436 transitions, 8440 flow. Second operand has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:46,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:46,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:07:46,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:47,834 INFO L130 PetriNetUnfolder]: 1745/3165 cut-off events. [2023-08-31 01:07:47,834 INFO L131 PetriNetUnfolder]: For 60343/60343 co-relation queries the response was YES. [2023-08-31 01:07:47,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28475 conditions, 3165 events. 1745/3165 cut-off events. For 60343/60343 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 20697 event pairs, 375 based on Foata normal form. 8/3173 useless extension candidates. Maximal degree in co-relation 28324. Up to 1775 conditions per place. [2023-08-31 01:07:47,867 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 275 selfloop transitions, 222 changer transitions 4/501 dead transitions. [2023-08-31 01:07:47,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 501 transitions, 10350 flow [2023-08-31 01:07:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:07:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:07:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2417 transitions. [2023-08-31 01:07:47,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380210791253736 [2023-08-31 01:07:47,870 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2417 transitions. [2023-08-31 01:07:47,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2417 transitions. [2023-08-31 01:07:47,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:47,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2417 transitions. [2023-08-31 01:07:47,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.92307692307693) internal successors, (2417), 13 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:47,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:47,876 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:47,876 INFO L175 Difference]: Start difference. First operand has 269 places, 436 transitions, 8440 flow. Second operand 13 states and 2417 transitions. [2023-08-31 01:07:47,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 501 transitions, 10350 flow [2023-08-31 01:07:48,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 501 transitions, 10254 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-31 01:07:48,124 INFO L231 Difference]: Finished difference. Result has 274 places, 442 transitions, 8957 flow [2023-08-31 01:07:48,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8352, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8957, PETRI_PLACES=274, PETRI_TRANSITIONS=442} [2023-08-31 01:07:48,125 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 251 predicate places. [2023-08-31 01:07:48,125 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 442 transitions, 8957 flow [2023-08-31 01:07:48,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:48,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:48,126 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:48,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:48,327 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:48,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1185029791, now seen corresponding path program 24 times [2023-08-31 01:07:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:48,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747334582] [2023-08-31 01:07:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:48,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:48,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747334582] [2023-08-31 01:07:48,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747334582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:48,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587534791] [2023-08-31 01:07:48,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:07:48,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:48,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:48,748 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) [2023-08-31 01:07:48,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 01:07:48,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:07:48,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:07:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:49,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-08-31 01:07:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:49,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:49,263 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:07:49,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:07:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:49,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587534791] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:49,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:49,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:07:49,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810172032] [2023-08-31 01:07:49,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:49,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:07:49,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:07:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:07:49,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:07:49,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 442 transitions, 8957 flow. Second operand has 19 states, 19 states have (on average 181.21052631578948) internal successors, (3443), 19 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:49,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:49,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:07:49,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:50,913 INFO L130 PetriNetUnfolder]: 1809/3277 cut-off events. [2023-08-31 01:07:50,913 INFO L131 PetriNetUnfolder]: For 68222/68222 co-relation queries the response was YES. [2023-08-31 01:07:50,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30695 conditions, 3277 events. 1809/3277 cut-off events. For 68222/68222 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 21571 event pairs, 402 based on Foata normal form. 12/3289 useless extension candidates. Maximal degree in co-relation 30544. Up to 1895 conditions per place. [2023-08-31 01:07:50,949 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 279 selfloop transitions, 224 changer transitions 2/505 dead transitions. [2023-08-31 01:07:50,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 505 transitions, 11007 flow [2023-08-31 01:07:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:07:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:07:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2032 transitions. [2023-08-31 01:07:50,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37776538390035325 [2023-08-31 01:07:50,952 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2032 transitions. [2023-08-31 01:07:50,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2032 transitions. [2023-08-31 01:07:50,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:50,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2032 transitions. [2023-08-31 01:07:50,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:50,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:50,955 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:50,956 INFO L175 Difference]: Start difference. First operand has 274 places, 442 transitions, 8957 flow. Second operand 11 states and 2032 transitions. [2023-08-31 01:07:50,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 505 transitions, 11007 flow [2023-08-31 01:07:51,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 505 transitions, 10789 flow, removed 19 selfloop flow, removed 7 redundant places. [2023-08-31 01:07:51,286 INFO L231 Difference]: Finished difference. Result has 279 places, 453 transitions, 9713 flow [2023-08-31 01:07:51,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8745, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9713, PETRI_PLACES=279, PETRI_TRANSITIONS=453} [2023-08-31 01:07:51,287 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 256 predicate places. [2023-08-31 01:07:51,287 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 453 transitions, 9713 flow [2023-08-31 01:07:51,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 181.21052631578948) internal successors, (3443), 19 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:51,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:51,288 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:51,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:51,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:51,494 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:51,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:51,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1140820281, now seen corresponding path program 25 times [2023-08-31 01:07:51,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:51,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527232138] [2023-08-31 01:07:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:51,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:52,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527232138] [2023-08-31 01:07:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527232138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172620095] [2023-08-31 01:07:52,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:07:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:52,030 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) [2023-08-31 01:07:52,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 01:07:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:07:52,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:52,318 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:07:52,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 01:07:52,326 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:07:52,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:07:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:52,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:52,613 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:07:52,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:07:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172620095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:52,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:52,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:07:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203670462] [2023-08-31 01:07:52,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:07:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:07:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:07:53,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:07:53,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 453 transitions, 9713 flow. Second operand has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:53,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:53,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:07:53,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:54,848 INFO L130 PetriNetUnfolder]: 1881/3409 cut-off events. [2023-08-31 01:07:54,848 INFO L131 PetriNetUnfolder]: For 79366/79366 co-relation queries the response was YES. [2023-08-31 01:07:54,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33448 conditions, 3409 events. 1881/3409 cut-off events. For 79366/79366 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 22656 event pairs, 390 based on Foata normal form. 8/3417 useless extension candidates. Maximal degree in co-relation 33294. Up to 1861 conditions per place. [2023-08-31 01:07:54,891 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 290 selfloop transitions, 242 changer transitions 4/536 dead transitions. [2023-08-31 01:07:54,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 536 transitions, 12059 flow [2023-08-31 01:07:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:07:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:07:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3153 transitions. [2023-08-31 01:07:54,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792854565138939 [2023-08-31 01:07:54,893 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3153 transitions. [2023-08-31 01:07:54,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3153 transitions. [2023-08-31 01:07:54,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:54,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3153 transitions. [2023-08-31 01:07:54,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 185.47058823529412) internal successors, (3153), 17 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:54,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:54,902 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:54,902 INFO L175 Difference]: Start difference. First operand has 279 places, 453 transitions, 9713 flow. Second operand 17 states and 3153 transitions. [2023-08-31 01:07:54,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 536 transitions, 12059 flow [2023-08-31 01:07:55,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 536 transitions, 11721 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-08-31 01:07:55,207 INFO L231 Difference]: Finished difference. Result has 292 places, 463 transitions, 10236 flow [2023-08-31 01:07:55,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9401, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10236, PETRI_PLACES=292, PETRI_TRANSITIONS=463} [2023-08-31 01:07:55,207 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 269 predicate places. [2023-08-31 01:07:55,207 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 463 transitions, 10236 flow [2023-08-31 01:07:55,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:55,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:55,208 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:55,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:55,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:55,408 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:55,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash 840106411, now seen corresponding path program 26 times [2023-08-31 01:07:55,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:55,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896734541] [2023-08-31 01:07:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:55,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:55,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:55,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896734541] [2023-08-31 01:07:55,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896734541] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:55,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691922423] [2023-08-31 01:07:55,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:07:55,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:55,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:07:55,978 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) [2023-08-31 01:07:55,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 01:07:56,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:07:56,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:07:56,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:07:56,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:07:56,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:07:56,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:07:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:56,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:07:56,568 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:07:56,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:07:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:56,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691922423] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:07:56,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:07:56,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:07:56,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601642619] [2023-08-31 01:07:56,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:07:56,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:07:56,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:07:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:07:56,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:07:57,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:07:57,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 463 transitions, 10236 flow. Second operand has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:57,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:07:57,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:07:57,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:07:58,914 INFO L130 PetriNetUnfolder]: 1897/3429 cut-off events. [2023-08-31 01:07:58,914 INFO L131 PetriNetUnfolder]: For 82240/82240 co-relation queries the response was YES. [2023-08-31 01:07:58,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34570 conditions, 3429 events. 1897/3429 cut-off events. For 82240/82240 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 22764 event pairs, 429 based on Foata normal form. 8/3437 useless extension candidates. Maximal degree in co-relation 34412. Up to 2131 conditions per place. [2023-08-31 01:07:58,953 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 278 selfloop transitions, 233 changer transitions 8/519 dead transitions. [2023-08-31 01:07:58,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 519 transitions, 12036 flow [2023-08-31 01:07:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:07:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:07:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2960 transitions. [2023-08-31 01:07:58,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783231083844581 [2023-08-31 01:07:58,960 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2960 transitions. [2023-08-31 01:07:58,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2960 transitions. [2023-08-31 01:07:58,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:07:58,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2960 transitions. [2023-08-31 01:07:58,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 185.0) internal successors, (2960), 16 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:58,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:58,966 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:58,967 INFO L175 Difference]: Start difference. First operand has 292 places, 463 transitions, 10236 flow. Second operand 16 states and 2960 transitions. [2023-08-31 01:07:58,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 519 transitions, 12036 flow [2023-08-31 01:07:59,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 519 transitions, 11713 flow, removed 71 selfloop flow, removed 8 redundant places. [2023-08-31 01:07:59,307 INFO L231 Difference]: Finished difference. Result has 300 places, 463 transitions, 10487 flow [2023-08-31 01:07:59,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9881, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10487, PETRI_PLACES=300, PETRI_TRANSITIONS=463} [2023-08-31 01:07:59,308 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 277 predicate places. [2023-08-31 01:07:59,308 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 463 transitions, 10487 flow [2023-08-31 01:07:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:07:59,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:07:59,309 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:07:59,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 01:07:59,509 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,SelfDestructingSolverStorable34 [2023-08-31 01:07:59,510 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:07:59,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:07:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2084366075, now seen corresponding path program 27 times [2023-08-31 01:07:59,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:07:59,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833479076] [2023-08-31 01:07:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:07:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:07:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:07:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:07:59,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:07:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833479076] [2023-08-31 01:07:59,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833479076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:07:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892685703] [2023-08-31 01:07:59,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:07:59,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:07:59,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:00,000 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) [2023-08-31 01:08:00,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 01:08:00,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:08:00,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:08:00,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:08:00,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:00,294 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:08:00,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 01:08:00,303 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:08:00,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:08:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:00,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:00,561 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:08:00,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:08:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892685703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:00,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:00,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:08:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360829087] [2023-08-31 01:08:00,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:00,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:08:00,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:08:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:08:01,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:08:01,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 463 transitions, 10487 flow. Second operand has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:01,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:01,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:08:01,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:02,459 INFO L130 PetriNetUnfolder]: 1869/3363 cut-off events. [2023-08-31 01:08:02,459 INFO L131 PetriNetUnfolder]: For 82079/82079 co-relation queries the response was YES. [2023-08-31 01:08:02,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34922 conditions, 3363 events. 1869/3363 cut-off events. For 82079/82079 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 22134 event pairs, 405 based on Foata normal form. 8/3371 useless extension candidates. Maximal degree in co-relation 34762. Up to 2021 conditions per place. [2023-08-31 01:08:02,498 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 280 selfloop transitions, 225 changer transitions 9/514 dead transitions. [2023-08-31 01:08:02,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 514 transitions, 12201 flow [2023-08-31 01:08:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:08:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:08:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2595 transitions. [2023-08-31 01:08:02,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790534618755478 [2023-08-31 01:08:02,500 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2595 transitions. [2023-08-31 01:08:02,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2595 transitions. [2023-08-31 01:08:02,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:02,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2595 transitions. [2023-08-31 01:08:02,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.35714285714286) internal successors, (2595), 14 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:02,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:02,505 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:02,505 INFO L175 Difference]: Start difference. First operand has 300 places, 463 transitions, 10487 flow. Second operand 14 states and 2595 transitions. [2023-08-31 01:08:02,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 514 transitions, 12201 flow [2023-08-31 01:08:02,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 514 transitions, 11670 flow, removed 13 selfloop flow, removed 15 redundant places. [2023-08-31 01:08:02,820 INFO L231 Difference]: Finished difference. Result has 295 places, 459 transitions, 10362 flow [2023-08-31 01:08:02,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9948, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10362, PETRI_PLACES=295, PETRI_TRANSITIONS=459} [2023-08-31 01:08:02,821 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 272 predicate places. [2023-08-31 01:08:02,821 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 459 transitions, 10362 flow [2023-08-31 01:08:02,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:02,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:02,821 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:02,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:03,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-31 01:08:03,022 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:03,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:03,022 INFO L85 PathProgramCache]: Analyzing trace with hash -691507321, now seen corresponding path program 28 times [2023-08-31 01:08:03,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:03,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944191778] [2023-08-31 01:08:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:03,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:03,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:03,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944191778] [2023-08-31 01:08:03,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944191778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:03,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922857997] [2023-08-31 01:08:03,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:08:03,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:03,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:03,509 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) [2023-08-31 01:08:03,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 01:08:03,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:08:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:08:03,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:08:03,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:03,834 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:08:03,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 01:08:03,842 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:08:03,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:08:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:03,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:04,089 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:08:04,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-08-31 01:08:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:04,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922857997] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:04,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:04,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:08:04,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427704175] [2023-08-31 01:08:04,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:04,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:08:04,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:08:04,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:08:04,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:08:04,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 459 transitions, 10362 flow. Second operand has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:04,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:04,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:08:04,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:06,602 INFO L130 PetriNetUnfolder]: 2003/3611 cut-off events. [2023-08-31 01:08:06,602 INFO L131 PetriNetUnfolder]: For 93253/93253 co-relation queries the response was YES. [2023-08-31 01:08:06,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38167 conditions, 3611 events. 2003/3611 cut-off events. For 93253/93253 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 24150 event pairs, 353 based on Foata normal form. 8/3619 useless extension candidates. Maximal degree in co-relation 38008. Up to 1839 conditions per place. [2023-08-31 01:08:06,646 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 289 selfloop transitions, 269 changer transitions 7/565 dead transitions. [2023-08-31 01:08:06,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 565 transitions, 13338 flow [2023-08-31 01:08:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:08:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:08:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4072 transitions. [2023-08-31 01:08:06,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37850901654582636 [2023-08-31 01:08:06,649 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4072 transitions. [2023-08-31 01:08:06,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4072 transitions. [2023-08-31 01:08:06,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:06,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4072 transitions. [2023-08-31 01:08:06,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 185.0909090909091) internal successors, (4072), 22 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:06,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:06,656 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:06,656 INFO L175 Difference]: Start difference. First operand has 295 places, 459 transitions, 10362 flow. Second operand 22 states and 4072 transitions. [2023-08-31 01:08:06,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 565 transitions, 13338 flow [2023-08-31 01:08:07,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 565 transitions, 13035 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-31 01:08:07,023 INFO L231 Difference]: Finished difference. Result has 308 places, 484 transitions, 11514 flow [2023-08-31 01:08:07,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10075, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11514, PETRI_PLACES=308, PETRI_TRANSITIONS=484} [2023-08-31 01:08:07,024 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 285 predicate places. [2023-08-31 01:08:07,024 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 484 transitions, 11514 flow [2023-08-31 01:08:07,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:07,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:07,025 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:07,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:07,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:07,228 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:07,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:07,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1064638639, now seen corresponding path program 29 times [2023-08-31 01:08:07,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:07,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122306623] [2023-08-31 01:08:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:07,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:07,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:07,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122306623] [2023-08-31 01:08:07,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122306623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:07,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223167419] [2023-08-31 01:08:07,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:08:07,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:07,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:07,740 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) [2023-08-31 01:08:07,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 01:08:07,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:08:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:08:07,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:08:07,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:08,111 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:08:08,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 32 [2023-08-31 01:08:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:08,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:08,273 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:08:08,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:08:08,289 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:08:08,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:08:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:08,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223167419] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:08,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:08,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:08:08,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334367395] [2023-08-31 01:08:08,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:08,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:08:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:08:08,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:08:08,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:08:08,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 484 transitions, 11514 flow. Second operand has 19 states, 19 states have (on average 182.31578947368422) internal successors, (3464), 19 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:08,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:08,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:08:08,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:10,036 INFO L130 PetriNetUnfolder]: 1993/3591 cut-off events. [2023-08-31 01:08:10,036 INFO L131 PetriNetUnfolder]: For 101672/101672 co-relation queries the response was YES. [2023-08-31 01:08:10,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39056 conditions, 3591 events. 1993/3591 cut-off events. For 101672/101672 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 24010 event pairs, 512 based on Foata normal form. 8/3599 useless extension candidates. Maximal degree in co-relation 38892. Up to 2519 conditions per place. [2023-08-31 01:08:10,078 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 215 selfloop transitions, 285 changer transitions 11/511 dead transitions. [2023-08-31 01:08:10,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 511 transitions, 12806 flow [2023-08-31 01:08:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:08:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:08:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2044 transitions. [2023-08-31 01:08:10,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37999628183677264 [2023-08-31 01:08:10,081 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2044 transitions. [2023-08-31 01:08:10,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2044 transitions. [2023-08-31 01:08:10,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:10,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2044 transitions. [2023-08-31 01:08:10,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.8181818181818) internal successors, (2044), 11 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:10,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:10,085 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:10,085 INFO L175 Difference]: Start difference. First operand has 308 places, 484 transitions, 11514 flow. Second operand 11 states and 2044 transitions. [2023-08-31 01:08:10,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 511 transitions, 12806 flow [2023-08-31 01:08:10,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 511 transitions, 12331 flow, removed 100 selfloop flow, removed 10 redundant places. [2023-08-31 01:08:10,522 INFO L231 Difference]: Finished difference. Result has 310 places, 485 transitions, 11879 flow [2023-08-31 01:08:10,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11039, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11879, PETRI_PLACES=310, PETRI_TRANSITIONS=485} [2023-08-31 01:08:10,523 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 287 predicate places. [2023-08-31 01:08:10,523 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 485 transitions, 11879 flow [2023-08-31 01:08:10,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.31578947368422) internal successors, (3464), 19 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:10,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:10,524 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:10,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:10,724 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,SelfDestructingSolverStorable37 [2023-08-31 01:08:10,724 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:10,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash 844197721, now seen corresponding path program 30 times [2023-08-31 01:08:10,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:10,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499557820] [2023-08-31 01:08:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:10,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:11,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:11,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499557820] [2023-08-31 01:08:11,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499557820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:11,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060017423] [2023-08-31 01:08:11,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:08:11,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:11,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:11,255 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) [2023-08-31 01:08:11,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 01:08:11,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:08:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:08:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-31 01:08:11,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:11,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-08-31 01:08:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-31 01:08:11,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:11,873 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:08:11,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:08:11,888 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:08:11,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:08:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:11,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060017423] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:11,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:11,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 8] total 24 [2023-08-31 01:08:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177456765] [2023-08-31 01:08:11,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:11,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:08:11,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:08:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:08:12,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 489 [2023-08-31 01:08:12,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 485 transitions, 11879 flow. Second operand has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:12,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:12,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 489 [2023-08-31 01:08:12,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:14,331 INFO L130 PetriNetUnfolder]: 2013/3597 cut-off events. [2023-08-31 01:08:14,332 INFO L131 PetriNetUnfolder]: For 106759/106759 co-relation queries the response was YES. [2023-08-31 01:08:14,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39996 conditions, 3597 events. 2013/3597 cut-off events. For 106759/106759 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 23785 event pairs, 394 based on Foata normal form. 12/3609 useless extension candidates. Maximal degree in co-relation 39837. Up to 1982 conditions per place. [2023-08-31 01:08:14,383 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 266 selfloop transitions, 268 changer transitions 2/536 dead transitions. [2023-08-31 01:08:14,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 536 transitions, 13787 flow [2023-08-31 01:08:14,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:08:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:08:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3048 transitions. [2023-08-31 01:08:14,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3666546373150487 [2023-08-31 01:08:14,385 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3048 transitions. [2023-08-31 01:08:14,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3048 transitions. [2023-08-31 01:08:14,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:14,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3048 transitions. [2023-08-31 01:08:14,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 179.2941176470588) internal successors, (3048), 17 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:14,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:14,392 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:14,392 INFO L175 Difference]: Start difference. First operand has 310 places, 485 transitions, 11879 flow. Second operand 17 states and 3048 transitions. [2023-08-31 01:08:14,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 536 transitions, 13787 flow [2023-08-31 01:08:14,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 536 transitions, 13529 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-08-31 01:08:14,867 INFO L231 Difference]: Finished difference. Result has 319 places, 488 transitions, 12524 flow [2023-08-31 01:08:14,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11627, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12524, PETRI_PLACES=319, PETRI_TRANSITIONS=488} [2023-08-31 01:08:14,868 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 296 predicate places. [2023-08-31 01:08:14,868 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 488 transitions, 12524 flow [2023-08-31 01:08:14,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:14,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:14,869 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:14,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:15,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-31 01:08:15,070 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:15,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash 799988211, now seen corresponding path program 31 times [2023-08-31 01:08:15,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:15,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622525880] [2023-08-31 01:08:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:15,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:15,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622525880] [2023-08-31 01:08:15,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622525880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396732710] [2023-08-31 01:08:15,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:08:15,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:15,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:15,492 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:08:15,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-31 01:08:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:15,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:08:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:15,808 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:08:15,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 01:08:15,817 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:08:15,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:08:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:15,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:16,042 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:08:16,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:08:16,056 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:08:16,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:08:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:16,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396732710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:16,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:16,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:08:16,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437844910] [2023-08-31 01:08:16,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:16,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:08:16,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:16,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:08:16,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:08:16,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:08:16,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 488 transitions, 12524 flow. Second operand has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:16,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:16,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:08:16,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:18,244 INFO L130 PetriNetUnfolder]: 2085/3729 cut-off events. [2023-08-31 01:08:18,244 INFO L131 PetriNetUnfolder]: For 121695/121695 co-relation queries the response was YES. [2023-08-31 01:08:18,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43062 conditions, 3729 events. 2085/3729 cut-off events. For 121695/121695 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 24900 event pairs, 384 based on Foata normal form. 8/3737 useless extension candidates. Maximal degree in co-relation 42883. Up to 1959 conditions per place. [2023-08-31 01:08:18,285 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 290 selfloop transitions, 273 changer transitions 4/567 dead transitions. [2023-08-31 01:08:18,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 567 transitions, 14986 flow [2023-08-31 01:08:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:08:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:08:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3333 transitions. [2023-08-31 01:08:18,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37866394001363324 [2023-08-31 01:08:18,290 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3333 transitions. [2023-08-31 01:08:18,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3333 transitions. [2023-08-31 01:08:18,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:18,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3333 transitions. [2023-08-31 01:08:18,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 185.16666666666666) internal successors, (3333), 18 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:18,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:18,301 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:18,301 INFO L175 Difference]: Start difference. First operand has 319 places, 488 transitions, 12524 flow. Second operand 18 states and 3333 transitions. [2023-08-31 01:08:18,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 567 transitions, 14986 flow [2023-08-31 01:08:18,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 567 transitions, 14856 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-08-31 01:08:18,884 INFO L231 Difference]: Finished difference. Result has 329 places, 498 transitions, 13384 flow [2023-08-31 01:08:18,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=12410, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13384, PETRI_PLACES=329, PETRI_TRANSITIONS=498} [2023-08-31 01:08:18,885 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 306 predicate places. [2023-08-31 01:08:18,885 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 498 transitions, 13384 flow [2023-08-31 01:08:18,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:18,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:18,886 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:18,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:19,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-31 01:08:19,094 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:19,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:19,095 INFO L85 PathProgramCache]: Analyzing trace with hash -570506599, now seen corresponding path program 32 times [2023-08-31 01:08:19,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:19,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473167219] [2023-08-31 01:08:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:19,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:19,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:19,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473167219] [2023-08-31 01:08:19,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473167219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:19,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143107574] [2023-08-31 01:08:19,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:08:19,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:19,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:19,588 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:08:19,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-31 01:08:19,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:08:19,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:08:19,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:08:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:19,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:19,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:08:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:19,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:20,141 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:08:20,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:08:20,157 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:08:20,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:08:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:20,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143107574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:20,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:20,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:08:20,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101130086] [2023-08-31 01:08:20,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:20,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:08:20,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:08:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:08:20,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:08:20,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 498 transitions, 13384 flow. Second operand has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:20,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:20,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:08:20,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:22,233 INFO L130 PetriNetUnfolder]: 2133/3821 cut-off events. [2023-08-31 01:08:22,233 INFO L131 PetriNetUnfolder]: For 139890/139890 co-relation queries the response was YES. [2023-08-31 01:08:22,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45639 conditions, 3821 events. 2133/3821 cut-off events. For 139890/139890 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 25704 event pairs, 410 based on Foata normal form. 8/3829 useless extension candidates. Maximal degree in co-relation 45467. Up to 2077 conditions per place. [2023-08-31 01:08:22,282 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 275 selfloop transitions, 276 changer transitions 2/553 dead transitions. [2023-08-31 01:08:22,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 553 transitions, 15379 flow [2023-08-31 01:08:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:08:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:08:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2596 transitions. [2023-08-31 01:08:22,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791995325737657 [2023-08-31 01:08:22,284 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2596 transitions. [2023-08-31 01:08:22,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2596 transitions. [2023-08-31 01:08:22,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:22,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2596 transitions. [2023-08-31 01:08:22,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.42857142857142) internal successors, (2596), 14 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:22,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:22,374 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:22,374 INFO L175 Difference]: Start difference. First operand has 329 places, 498 transitions, 13384 flow. Second operand 14 states and 2596 transitions. [2023-08-31 01:08:22,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 553 transitions, 15379 flow [2023-08-31 01:08:22,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 553 transitions, 15071 flow, removed 53 selfloop flow, removed 10 redundant places. [2023-08-31 01:08:22,961 INFO L231 Difference]: Finished difference. Result has 333 places, 504 transitions, 13844 flow [2023-08-31 01:08:22,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=13080, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13844, PETRI_PLACES=333, PETRI_TRANSITIONS=504} [2023-08-31 01:08:22,962 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 310 predicate places. [2023-08-31 01:08:22,963 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 504 transitions, 13844 flow [2023-08-31 01:08:22,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:22,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:22,964 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:22,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:23,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:23,170 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:23,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash -675003441, now seen corresponding path program 33 times [2023-08-31 01:08:23,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:23,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372385164] [2023-08-31 01:08:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:23,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:23,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372385164] [2023-08-31 01:08:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372385164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315465760] [2023-08-31 01:08:23,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:08:23,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:23,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:23,646 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:08:23,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-31 01:08:23,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:08:23,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:08:23,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 01:08:23,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:24,095 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:08:24,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:08:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:24,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:24,532 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:08:24,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-08-31 01:08:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:24,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315465760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:24,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:24,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2023-08-31 01:08:24,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010170693] [2023-08-31 01:08:24,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:24,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:08:24,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:24,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:08:24,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:08:25,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-31 01:08:25,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 504 transitions, 13844 flow. Second operand has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:25,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:25,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-31 01:08:25,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:27,504 INFO L130 PetriNetUnfolder]: 2225/3961 cut-off events. [2023-08-31 01:08:27,504 INFO L131 PetriNetUnfolder]: For 144314/144314 co-relation queries the response was YES. [2023-08-31 01:08:27,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49125 conditions, 3961 events. 2225/3961 cut-off events. For 144314/144314 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 26584 event pairs, 232 based on Foata normal form. 20/3981 useless extension candidates. Maximal degree in co-relation 48951. Up to 2602 conditions per place. [2023-08-31 01:08:27,552 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 252 selfloop transitions, 321 changer transitions 1/574 dead transitions. [2023-08-31 01:08:27,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 574 transitions, 16307 flow [2023-08-31 01:08:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 01:08:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 01:08:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3825 transitions. [2023-08-31 01:08:27,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37248028045574055 [2023-08-31 01:08:27,555 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3825 transitions. [2023-08-31 01:08:27,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3825 transitions. [2023-08-31 01:08:27,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:27,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3825 transitions. [2023-08-31 01:08:27,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 182.14285714285714) internal successors, (3825), 21 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:27,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:27,566 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:27,566 INFO L175 Difference]: Start difference. First operand has 333 places, 504 transitions, 13844 flow. Second operand 21 states and 3825 transitions. [2023-08-31 01:08:27,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 574 transitions, 16307 flow [2023-08-31 01:08:28,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 574 transitions, 15689 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-08-31 01:08:28,154 INFO L231 Difference]: Finished difference. Result has 346 places, 525 transitions, 15091 flow [2023-08-31 01:08:28,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=13182, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15091, PETRI_PLACES=346, PETRI_TRANSITIONS=525} [2023-08-31 01:08:28,155 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 323 predicate places. [2023-08-31 01:08:28,155 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 525 transitions, 15091 flow [2023-08-31 01:08:28,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:28,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:28,156 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:28,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:28,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:28,356 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:28,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:28,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1970984051, now seen corresponding path program 34 times [2023-08-31 01:08:28,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:28,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348931000] [2023-08-31 01:08:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:28,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:28,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348931000] [2023-08-31 01:08:28,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348931000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:28,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941397014] [2023-08-31 01:08:28,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:08:28,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:28,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:28,763 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:08:28,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-31 01:08:28,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:08:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:08:28,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:08:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:29,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:29,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-31 01:08:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:29,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:29,308 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:08:29,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:08:29,322 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:08:29,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:08:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:29,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941397014] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:29,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:29,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:08:29,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764838242] [2023-08-31 01:08:29,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:29,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:08:29,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:29,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:08:29,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:08:30,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:08:30,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 525 transitions, 15091 flow. Second operand has 20 states, 20 states have (on average 182.25) internal successors, (3645), 20 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:30,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:30,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:08:30,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:31,614 INFO L130 PetriNetUnfolder]: 2205/3921 cut-off events. [2023-08-31 01:08:31,614 INFO L131 PetriNetUnfolder]: For 156501/156501 co-relation queries the response was YES. [2023-08-31 01:08:31,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50291 conditions, 3921 events. 2205/3921 cut-off events. For 156501/156501 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 26305 event pairs, 441 based on Foata normal form. 8/3929 useless extension candidates. Maximal degree in co-relation 50113. Up to 2251 conditions per place. [2023-08-31 01:08:31,667 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 295 selfloop transitions, 270 changer transitions 8/573 dead transitions. [2023-08-31 01:08:31,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 573 transitions, 16934 flow [2023-08-31 01:08:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:08:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:08:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2414 transitions. [2023-08-31 01:08:31,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37973887053641653 [2023-08-31 01:08:31,670 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2414 transitions. [2023-08-31 01:08:31,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2414 transitions. [2023-08-31 01:08:31,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:31,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2414 transitions. [2023-08-31 01:08:31,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.69230769230768) internal successors, (2414), 13 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:31,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:31,680 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:31,680 INFO L175 Difference]: Start difference. First operand has 346 places, 525 transitions, 15091 flow. Second operand 13 states and 2414 transitions. [2023-08-31 01:08:31,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 573 transitions, 16934 flow [2023-08-31 01:08:32,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 573 transitions, 16633 flow, removed 53 selfloop flow, removed 11 redundant places. [2023-08-31 01:08:32,330 INFO L231 Difference]: Finished difference. Result has 346 places, 522 transitions, 15300 flow [2023-08-31 01:08:32,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14778, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15300, PETRI_PLACES=346, PETRI_TRANSITIONS=522} [2023-08-31 01:08:32,331 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 323 predicate places. [2023-08-31 01:08:32,331 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 522 transitions, 15300 flow [2023-08-31 01:08:32,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.25) internal successors, (3645), 20 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:32,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:32,332 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:32,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:32,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-31 01:08:32,534 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:32,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:32,534 INFO L85 PathProgramCache]: Analyzing trace with hash 499274341, now seen corresponding path program 35 times [2023-08-31 01:08:32,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:32,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885938402] [2023-08-31 01:08:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:32,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:33,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885938402] [2023-08-31 01:08:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885938402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:33,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802720063] [2023-08-31 01:08:33,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:08:33,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:33,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:33,102 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:08:33,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-31 01:08:33,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:08:33,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:08:33,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 01:08:33,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:33,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:33,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2023-08-31 01:08:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:33,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:33,639 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:08:33,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:08:33,670 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:08:33,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:08:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:33,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802720063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:33,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:33,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-08-31 01:08:33,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123887173] [2023-08-31 01:08:33,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:33,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:08:33,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:33,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:08:33,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:08:34,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:08:34,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 522 transitions, 15300 flow. Second operand has 24 states, 24 states have (on average 182.29166666666666) internal successors, (4375), 24 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:34,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:34,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:08:34,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:36,195 INFO L130 PetriNetUnfolder]: 2173/3851 cut-off events. [2023-08-31 01:08:36,195 INFO L131 PetriNetUnfolder]: For 164863/164863 co-relation queries the response was YES. [2023-08-31 01:08:36,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50681 conditions, 3851 events. 2173/3851 cut-off events. For 164863/164863 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 25621 event pairs, 417 based on Foata normal form. 8/3859 useless extension candidates. Maximal degree in co-relation 50503. Up to 2239 conditions per place. [2023-08-31 01:08:36,245 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 278 selfloop transitions, 281 changer transitions 6/565 dead transitions. [2023-08-31 01:08:36,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 565 transitions, 17051 flow [2023-08-31 01:08:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:08:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:08:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2957 transitions. [2023-08-31 01:08:36,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.377939672801636 [2023-08-31 01:08:36,247 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2957 transitions. [2023-08-31 01:08:36,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2957 transitions. [2023-08-31 01:08:36,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:36,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2957 transitions. [2023-08-31 01:08:36,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 184.8125) internal successors, (2957), 16 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:36,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:36,255 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:36,255 INFO L175 Difference]: Start difference. First operand has 346 places, 522 transitions, 15300 flow. Second operand 16 states and 2957 transitions. [2023-08-31 01:08:36,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 565 transitions, 17051 flow [2023-08-31 01:08:36,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 565 transitions, 16637 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-08-31 01:08:36,913 INFO L231 Difference]: Finished difference. Result has 348 places, 519 transitions, 15415 flow [2023-08-31 01:08:36,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14865, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=15415, PETRI_PLACES=348, PETRI_TRANSITIONS=519} [2023-08-31 01:08:36,915 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 325 predicate places. [2023-08-31 01:08:36,915 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 519 transitions, 15415 flow [2023-08-31 01:08:36,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 182.29166666666666) internal successors, (4375), 24 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:36,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:36,916 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:36,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:37,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-31 01:08:37,117 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:37,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash 877654903, now seen corresponding path program 36 times [2023-08-31 01:08:37,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:37,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47566045] [2023-08-31 01:08:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:37,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:37,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:37,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47566045] [2023-08-31 01:08:37,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47566045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:37,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408448042] [2023-08-31 01:08:37,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:08:37,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:37,611 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:08:37,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-31 01:08:37,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:08:37,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:08:37,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-31 01:08:37,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:37,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:08:37,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:08:38,079 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:08:38,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 01:08:38,090 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:08:38,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:08:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:38,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:38,496 WARN L839 $PredicateComparison]: unable to prove that (and (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_2903 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2903))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset)))))) (forall ((v_ArrVal_2903 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2903))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))))))) is different from false [2023-08-31 01:08:38,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:38,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-08-31 01:08:38,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:38,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-31 01:08:38,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:38,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-08-31 01:08:38,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:38,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-31 01:08:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:38,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408448042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:38,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:38,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 01:08:38,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201824823] [2023-08-31 01:08:38,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:38,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:08:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:08:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=712, Unknown=1, NotChecked=54, Total=870 [2023-08-31 01:08:39,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-31 01:08:39,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 519 transitions, 15415 flow. Second operand has 30 states, 30 states have (on average 160.73333333333332) internal successors, (4822), 30 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:39,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:39,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-31 01:08:39,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:08:43,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:08:45,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:08:48,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:08:50,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:08:52,683 INFO L130 PetriNetUnfolder]: 2383/4269 cut-off events. [2023-08-31 01:08:52,684 INFO L131 PetriNetUnfolder]: For 183749/183749 co-relation queries the response was YES. [2023-08-31 01:08:52,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56598 conditions, 4269 events. 2383/4269 cut-off events. For 183749/183749 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 29200 event pairs, 359 based on Foata normal form. 40/4309 useless extension candidates. Maximal degree in co-relation 56421. Up to 1945 conditions per place. [2023-08-31 01:08:52,739 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 299 selfloop transitions, 349 changer transitions 5/653 dead transitions. [2023-08-31 01:08:52,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 653 transitions, 19434 flow [2023-08-31 01:08:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 01:08:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 01:08:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4115 transitions. [2023-08-31 01:08:52,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3366053169734151 [2023-08-31 01:08:52,748 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4115 transitions. [2023-08-31 01:08:52,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4115 transitions. [2023-08-31 01:08:52,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:52,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4115 transitions. [2023-08-31 01:08:52,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 164.6) internal successors, (4115), 25 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:52,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:52,760 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:52,761 INFO L175 Difference]: Start difference. First operand has 348 places, 519 transitions, 15415 flow. Second operand 25 states and 4115 transitions. [2023-08-31 01:08:52,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 653 transitions, 19434 flow [2023-08-31 01:08:53,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 653 transitions, 18849 flow, removed 48 selfloop flow, removed 12 redundant places. [2023-08-31 01:08:53,599 INFO L231 Difference]: Finished difference. Result has 370 places, 561 transitions, 17310 flow [2023-08-31 01:08:53,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14880, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=17310, PETRI_PLACES=370, PETRI_TRANSITIONS=561} [2023-08-31 01:08:53,600 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 347 predicate places. [2023-08-31 01:08:53,600 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 561 transitions, 17310 flow [2023-08-31 01:08:53,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.73333333333332) internal successors, (4822), 30 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:53,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:08:53,601 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:08:53,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-31 01:08:53,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-31 01:08:53,802 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:08:53,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:08:53,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1282584341, now seen corresponding path program 37 times [2023-08-31 01:08:53,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:08:53,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231647745] [2023-08-31 01:08:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:08:53,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:08:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:54,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:08:54,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231647745] [2023-08-31 01:08:54,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231647745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:08:54,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839313920] [2023-08-31 01:08:54,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:08:54,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:08:54,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:08:54,614 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:08:54,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-31 01:08:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:08:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-31 01:08:54,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:08:55,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:08:55,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:08:55,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:55,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:08:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:55,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:08:55,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:55,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-08-31 01:08:55,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:08:55,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-31 01:08:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:08:56,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839313920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:08:56,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:08:56,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-31 01:08:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22284144] [2023-08-31 01:08:56,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:08:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:08:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:08:56,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:08:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=812, Unknown=3, NotChecked=0, Total=930 [2023-08-31 01:08:58,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 489 [2023-08-31 01:08:58,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 561 transitions, 17310 flow. Second operand has 31 states, 31 states have (on average 154.74193548387098) internal successors, (4797), 31 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:58,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:08:58,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 489 [2023-08-31 01:08:58,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:02,416 INFO L130 PetriNetUnfolder]: 2601/4679 cut-off events. [2023-08-31 01:09:02,417 INFO L131 PetriNetUnfolder]: For 218619/218619 co-relation queries the response was YES. [2023-08-31 01:09:02,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64704 conditions, 4679 events. 2601/4679 cut-off events. For 218619/218619 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 32771 event pairs, 208 based on Foata normal form. 52/4731 useless extension candidates. Maximal degree in co-relation 64515. Up to 1566 conditions per place. [2023-08-31 01:09:02,494 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 303 selfloop transitions, 405 changer transitions 12/720 dead transitions. [2023-08-31 01:09:02,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 720 transitions, 22122 flow [2023-08-31 01:09:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 01:09:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 01:09:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4111 transitions. [2023-08-31 01:09:02,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32334434481673746 [2023-08-31 01:09:02,498 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4111 transitions. [2023-08-31 01:09:02,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4111 transitions. [2023-08-31 01:09:02,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:02,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4111 transitions. [2023-08-31 01:09:02,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 158.1153846153846) internal successors, (4111), 26 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:02,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:02,510 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:02,510 INFO L175 Difference]: Start difference. First operand has 370 places, 561 transitions, 17310 flow. Second operand 26 states and 4111 transitions. [2023-08-31 01:09:02,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 720 transitions, 22122 flow [2023-08-31 01:09:03,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 720 transitions, 20892 flow, removed 245 selfloop flow, removed 12 redundant places. [2023-08-31 01:09:03,534 INFO L231 Difference]: Finished difference. Result has 395 places, 614 transitions, 19234 flow [2023-08-31 01:09:03,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=16218, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=19234, PETRI_PLACES=395, PETRI_TRANSITIONS=614} [2023-08-31 01:09:03,535 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 372 predicate places. [2023-08-31 01:09:03,535 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 614 transitions, 19234 flow [2023-08-31 01:09:03,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 154.74193548387098) internal successors, (4797), 31 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:03,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:03,536 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:03,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:03,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-31 01:09:03,736 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:09:03,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1840882363, now seen corresponding path program 38 times [2023-08-31 01:09:03,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:03,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384069632] [2023-08-31 01:09:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:03,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:04,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:04,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384069632] [2023-08-31 01:09:04,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384069632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:04,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709535578] [2023-08-31 01:09:04,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:09:04,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:04,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:04,351 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:04,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-31 01:09:04,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:09:04,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:04,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 01:09:04,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:04,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:04,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:09:04,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:04,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:09:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:04,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:05,103 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3045 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3045))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (not (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|))))) (or (forall ((v_ArrVal_3045 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3045))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4))) is different from false [2023-08-31 01:09:05,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:05,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-08-31 01:09:05,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:05,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-31 01:09:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:05,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709535578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:05,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:05,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-31 01:09:05,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143857736] [2023-08-31 01:09:05,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:05,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:09:05,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:05,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:09:05,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=605, Unknown=1, NotChecked=50, Total=756 [2023-08-31 01:09:05,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-31 01:09:05,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 614 transitions, 19234 flow. Second operand has 28 states, 28 states have (on average 160.78571428571428) internal successors, (4502), 28 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:05,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:05,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-31 01:09:05,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:07,960 INFO L130 PetriNetUnfolder]: 2605/4691 cut-off events. [2023-08-31 01:09:07,961 INFO L131 PetriNetUnfolder]: For 240170/240170 co-relation queries the response was YES. [2023-08-31 01:09:08,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66179 conditions, 4691 events. 2605/4691 cut-off events. For 240170/240170 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32995 event pairs, 456 based on Foata normal form. 8/4699 useless extension candidates. Maximal degree in co-relation 65977. Up to 2441 conditions per place. [2023-08-31 01:09:08,031 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 309 selfloop transitions, 359 changer transitions 5/673 dead transitions. [2023-08-31 01:09:08,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 673 transitions, 21597 flow [2023-08-31 01:09:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:09:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:09:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2306 transitions. [2023-08-31 01:09:08,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3368390300905638 [2023-08-31 01:09:08,034 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2306 transitions. [2023-08-31 01:09:08,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2306 transitions. [2023-08-31 01:09:08,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:08,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2306 transitions. [2023-08-31 01:09:08,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.71428571428572) internal successors, (2306), 14 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:08,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:08,039 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:08,039 INFO L175 Difference]: Start difference. First operand has 395 places, 614 transitions, 19234 flow. Second operand 14 states and 2306 transitions. [2023-08-31 01:09:08,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 673 transitions, 21597 flow [2023-08-31 01:09:09,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 673 transitions, 20951 flow, removed 152 selfloop flow, removed 8 redundant places. [2023-08-31 01:09:09,203 INFO L231 Difference]: Finished difference. Result has 401 places, 621 transitions, 19571 flow [2023-08-31 01:09:09,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=18597, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19571, PETRI_PLACES=401, PETRI_TRANSITIONS=621} [2023-08-31 01:09:09,204 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 378 predicate places. [2023-08-31 01:09:09,205 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 621 transitions, 19571 flow [2023-08-31 01:09:09,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.78571428571428) internal successors, (4502), 28 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:09,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:09,205 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:09,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:09,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:09,406 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:09:09,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1947435843, now seen corresponding path program 39 times [2023-08-31 01:09:09,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:09,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944533667] [2023-08-31 01:09:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:09,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:09,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:09,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944533667] [2023-08-31 01:09:09,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944533667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:09,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428522613] [2023-08-31 01:09:09,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:09:09,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:09,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:09,914 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:09,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-31 01:09:10,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:09:10,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:10,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-31 01:09:10,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:10,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:09:10,378 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:09:10,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 01:09:10,386 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:09:10,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:09:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:10,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:10,826 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3116 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3116))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_3116 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3116))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))))))) is different from false [2023-08-31 01:09:10,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:10,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-08-31 01:09:10,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:10,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-31 01:09:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:11,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428522613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:11,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:11,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-31 01:09:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11228183] [2023-08-31 01:09:11,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:11,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:09:11,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:09:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=765, Unknown=1, NotChecked=56, Total=930 [2023-08-31 01:09:11,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-08-31 01:09:11,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 621 transitions, 19571 flow. Second operand has 31 states, 31 states have (on average 157.8709677419355) internal successors, (4894), 31 states have internal predecessors, (4894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:11,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:11,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-08-31 01:09:11,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:13,929 INFO L130 PetriNetUnfolder]: 2561/4595 cut-off events. [2023-08-31 01:09:13,930 INFO L131 PetriNetUnfolder]: For 229191/229191 co-relation queries the response was YES. [2023-08-31 01:09:13,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65245 conditions, 4595 events. 2561/4595 cut-off events. For 229191/229191 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 32015 event pairs, 265 based on Foata normal form. 32/4627 useless extension candidates. Maximal degree in co-relation 65041. Up to 2496 conditions per place. [2023-08-31 01:09:13,998 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 347 selfloop transitions, 319 changer transitions 16/682 dead transitions. [2023-08-31 01:09:13,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 682 transitions, 21699 flow [2023-08-31 01:09:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:09:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:09:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3220 transitions. [2023-08-31 01:09:14,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292433537832311 [2023-08-31 01:09:14,001 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3220 transitions. [2023-08-31 01:09:14,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3220 transitions. [2023-08-31 01:09:14,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:14,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3220 transitions. [2023-08-31 01:09:14,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 161.0) internal successors, (3220), 20 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:14,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:14,007 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:14,007 INFO L175 Difference]: Start difference. First operand has 401 places, 621 transitions, 19571 flow. Second operand 20 states and 3220 transitions. [2023-08-31 01:09:14,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 682 transitions, 21699 flow [2023-08-31 01:09:15,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 682 transitions, 20816 flow, removed 36 selfloop flow, removed 10 redundant places. [2023-08-31 01:09:15,147 INFO L231 Difference]: Finished difference. Result has 412 places, 613 transitions, 19115 flow [2023-08-31 01:09:15,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=18475, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=19115, PETRI_PLACES=412, PETRI_TRANSITIONS=613} [2023-08-31 01:09:15,148 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 389 predicate places. [2023-08-31 01:09:15,148 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 613 transitions, 19115 flow [2023-08-31 01:09:15,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 157.8709677419355) internal successors, (4894), 31 states have internal predecessors, (4894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:15,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:15,149 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:15,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:15,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-31 01:09:15,355 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:09:15,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1942602015, now seen corresponding path program 40 times [2023-08-31 01:09:15,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:15,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271615260] [2023-08-31 01:09:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:15,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:16,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:16,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271615260] [2023-08-31 01:09:16,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271615260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:16,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155806683] [2023-08-31 01:09:16,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:09:16,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:16,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:16,074 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:16,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-31 01:09:16,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:09:16,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 01:09:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:16,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:16,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:09:16,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:16,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-31 01:09:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:16,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:16,840 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3187 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3187))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))))))) (or (forall ((v_ArrVal_3187 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3187))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4))) is different from false [2023-08-31 01:09:16,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:16,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-08-31 01:09:16,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:16,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-31 01:09:16,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:16,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-08-31 01:09:16,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:16,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-31 01:09:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:17,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155806683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:17,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:17,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-31 01:09:17,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50571899] [2023-08-31 01:09:17,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:09:17,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:09:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=709, Unknown=1, NotChecked=54, Total=870 [2023-08-31 01:09:17,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-31 01:09:17,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 613 transitions, 19115 flow. Second operand has 30 states, 30 states have (on average 160.9) internal successors, (4827), 30 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:17,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:17,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-31 01:09:17,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:20,653 INFO L130 PetriNetUnfolder]: 2517/4489 cut-off events. [2023-08-31 01:09:20,653 INFO L131 PetriNetUnfolder]: For 236833/236833 co-relation queries the response was YES. [2023-08-31 01:09:20,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63643 conditions, 4489 events. 2517/4489 cut-off events. For 236833/236833 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 31013 event pairs, 246 based on Foata normal form. 8/4497 useless extension candidates. Maximal degree in co-relation 63435. Up to 1342 conditions per place. [2023-08-31 01:09:20,726 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 309 selfloop transitions, 361 changer transitions 9/679 dead transitions. [2023-08-31 01:09:20,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 679 transitions, 21448 flow [2023-08-31 01:09:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 01:09:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 01:09:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3930 transitions. [2023-08-31 01:09:20,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33486707566462165 [2023-08-31 01:09:20,729 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3930 transitions. [2023-08-31 01:09:20,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3930 transitions. [2023-08-31 01:09:20,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:20,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3930 transitions. [2023-08-31 01:09:20,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 163.75) internal successors, (3930), 24 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:20,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:20,738 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:20,738 INFO L175 Difference]: Start difference. First operand has 412 places, 613 transitions, 19115 flow. Second operand 24 states and 3930 transitions. [2023-08-31 01:09:20,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 679 transitions, 21448 flow [2023-08-31 01:09:21,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 679 transitions, 21152 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-08-31 01:09:21,901 INFO L231 Difference]: Finished difference. Result has 418 places, 610 transitions, 19522 flow [2023-08-31 01:09:21,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=18774, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=19522, PETRI_PLACES=418, PETRI_TRANSITIONS=610} [2023-08-31 01:09:21,903 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 395 predicate places. [2023-08-31 01:09:21,903 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 610 transitions, 19522 flow [2023-08-31 01:09:21,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.9) internal successors, (4827), 30 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:21,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:21,904 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:21,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:22,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-31 01:09:22,115 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:09:22,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:22,115 INFO L85 PathProgramCache]: Analyzing trace with hash -182788445, now seen corresponding path program 41 times [2023-08-31 01:09:22,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:22,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288470980] [2023-08-31 01:09:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:22,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:22,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288470980] [2023-08-31 01:09:22,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288470980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601313597] [2023-08-31 01:09:22,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:09:22,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:22,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:22,709 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:22,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-31 01:09:22,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:09:22,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 01:09:22,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:23,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:23,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:09:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:23,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:30,170 WARN L222 SmtUtils]: Spent 6.48s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 01:09:30,225 INFO L321 Elim1Store]: treesize reduction 16, result has 76.8 percent of original size [2023-08-31 01:09:30,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 132 [2023-08-31 01:09:30,233 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 01:09:30,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:30,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 76 [2023-08-31 01:09:30,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:30,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 169 [2023-08-31 01:09:30,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:30,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 91 [2023-08-31 01:09:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601313597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:31,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:31,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-31 01:09:31,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966113937] [2023-08-31 01:09:31,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:31,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:09:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:09:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=805, Unknown=2, NotChecked=0, Total=930 [2023-08-31 01:09:31,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-08-31 01:09:31,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 610 transitions, 19522 flow. Second operand has 31 states, 31 states have (on average 157.7741935483871) internal successors, (4891), 31 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:31,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:31,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-08-31 01:09:31,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:33,829 INFO L130 PetriNetUnfolder]: 2489/4443 cut-off events. [2023-08-31 01:09:33,829 INFO L131 PetriNetUnfolder]: For 233736/233736 co-relation queries the response was YES. [2023-08-31 01:09:33,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64606 conditions, 4443 events. 2489/4443 cut-off events. For 233736/233736 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 30578 event pairs, 444 based on Foata normal form. 16/4459 useless extension candidates. Maximal degree in co-relation 64399. Up to 2473 conditions per place. [2023-08-31 01:09:33,902 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 339 selfloop transitions, 312 changer transitions 11/662 dead transitions. [2023-08-31 01:09:33,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 662 transitions, 21479 flow [2023-08-31 01:09:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:09:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:09:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2102 transitions. [2023-08-31 01:09:33,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33065911593518954 [2023-08-31 01:09:33,904 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2102 transitions. [2023-08-31 01:09:33,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2102 transitions. [2023-08-31 01:09:33,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:33,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2102 transitions. [2023-08-31 01:09:33,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 161.69230769230768) internal successors, (2102), 13 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:33,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:33,909 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:33,909 INFO L175 Difference]: Start difference. First operand has 418 places, 610 transitions, 19522 flow. Second operand 13 states and 2102 transitions. [2023-08-31 01:09:33,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 662 transitions, 21479 flow [2023-08-31 01:09:34,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 662 transitions, 21269 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-08-31 01:09:34,990 INFO L231 Difference]: Finished difference. Result has 418 places, 609 transitions, 19919 flow [2023-08-31 01:09:34,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=19312, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19919, PETRI_PLACES=418, PETRI_TRANSITIONS=609} [2023-08-31 01:09:34,991 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 395 predicate places. [2023-08-31 01:09:34,991 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 609 transitions, 19919 flow [2023-08-31 01:09:34,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 157.7741935483871) internal successors, (4891), 31 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:34,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:34,992 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:34,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:35,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-31 01:09:35,193 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:09:35,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1816861323, now seen corresponding path program 42 times [2023-08-31 01:09:35,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:35,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933570198] [2023-08-31 01:09:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:35,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:36,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:36,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933570198] [2023-08-31 01:09:36,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933570198] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:36,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13214669] [2023-08-31 01:09:36,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:09:36,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:36,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:36,043 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:36,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-31 01:09:36,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:09:36,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:36,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 01:09:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:36,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:36,598 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:09:36,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2023-08-31 01:09:36,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:36,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-31 01:09:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:36,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:37,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:37,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 130 [2023-08-31 01:09:37,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:37,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-31 01:09:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:37,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13214669] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:37,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:37,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 32 [2023-08-31 01:09:37,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397719929] [2023-08-31 01:09:37,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:37,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 01:09:37,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:37,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 01:09:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=928, Unknown=1, NotChecked=0, Total=1056 [2023-08-31 01:09:39,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-08-31 01:09:39,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 609 transitions, 19919 flow. Second operand has 33 states, 33 states have (on average 156.63636363636363) internal successors, (5169), 33 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:39,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:39,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-08-31 01:09:39,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:42,501 INFO L130 PetriNetUnfolder]: 2637/4703 cut-off events. [2023-08-31 01:09:42,501 INFO L131 PetriNetUnfolder]: For 254292/254292 co-relation queries the response was YES. [2023-08-31 01:09:42,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70594 conditions, 4703 events. 2637/4703 cut-off events. For 254292/254292 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 32547 event pairs, 174 based on Foata normal form. 48/4751 useless extension candidates. Maximal degree in co-relation 70385. Up to 1470 conditions per place. [2023-08-31 01:09:42,576 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 331 selfloop transitions, 392 changer transitions 12/735 dead transitions. [2023-08-31 01:09:42,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 735 transitions, 24177 flow [2023-08-31 01:09:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 01:09:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 01:09:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3066 transitions. [2023-08-31 01:09:42,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32999677106877623 [2023-08-31 01:09:42,578 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3066 transitions. [2023-08-31 01:09:42,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3066 transitions. [2023-08-31 01:09:42,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:42,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3066 transitions. [2023-08-31 01:09:42,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 161.3684210526316) internal successors, (3066), 19 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:42,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:42,584 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:42,584 INFO L175 Difference]: Start difference. First operand has 418 places, 609 transitions, 19919 flow. Second operand 19 states and 3066 transitions. [2023-08-31 01:09:42,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 735 transitions, 24177 flow [2023-08-31 01:09:43,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 735 transitions, 23650 flow, removed 15 selfloop flow, removed 10 redundant places. [2023-08-31 01:09:43,939 INFO L231 Difference]: Finished difference. Result has 431 places, 637 transitions, 21563 flow [2023-08-31 01:09:43,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=19417, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=21563, PETRI_PLACES=431, PETRI_TRANSITIONS=637} [2023-08-31 01:09:43,940 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 408 predicate places. [2023-08-31 01:09:43,940 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 637 transitions, 21563 flow [2023-08-31 01:09:43,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 156.63636363636363) internal successors, (5169), 33 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:43,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:43,941 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:43,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:44,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:44,141 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:09:44,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash -747080383, now seen corresponding path program 43 times [2023-08-31 01:09:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:44,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408530453] [2023-08-31 01:09:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:44,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:45,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:45,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408530453] [2023-08-31 01:09:45,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408530453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:45,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667397160] [2023-08-31 01:09:45,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:09:45,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:45,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:45,019 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:45,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-31 01:09:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-31 01:09:45,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:45,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:45,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:45,526 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:09:45,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-31 01:09:45,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:45,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:09:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:45,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:46,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:46,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 130 [2023-08-31 01:09:46,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:46,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-31 01:09:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:46,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667397160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:46,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:46,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-31 01:09:46,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993182206] [2023-08-31 01:09:46,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:46,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:09:46,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:46,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:09:46,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=869, Unknown=3, NotChecked=0, Total=992 [2023-08-31 01:09:47,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-08-31 01:09:47,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 637 transitions, 21563 flow. Second operand has 32 states, 32 states have (on average 156.78125) internal successors, (5017), 32 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:47,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:47,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-08-31 01:09:47,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:50,736 INFO L130 PetriNetUnfolder]: 2597/4613 cut-off events. [2023-08-31 01:09:50,736 INFO L131 PetriNetUnfolder]: For 291214/291214 co-relation queries the response was YES. [2023-08-31 01:09:50,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71563 conditions, 4613 events. 2597/4613 cut-off events. For 291214/291214 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 31881 event pairs, 160 based on Foata normal form. 8/4621 useless extension candidates. Maximal degree in co-relation 71351. Up to 1426 conditions per place. [2023-08-31 01:09:50,947 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 296 selfloop transitions, 405 changer transitions 13/714 dead transitions. [2023-08-31 01:09:50,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 714 transitions, 24305 flow [2023-08-31 01:09:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:09:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:09:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3206 transitions. [2023-08-31 01:09:50,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3278118609406953 [2023-08-31 01:09:50,952 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3206 transitions. [2023-08-31 01:09:50,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3206 transitions. [2023-08-31 01:09:50,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:50,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3206 transitions. [2023-08-31 01:09:50,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 160.3) internal successors, (3206), 20 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:50,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:50,963 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:50,963 INFO L175 Difference]: Start difference. First operand has 431 places, 637 transitions, 21563 flow. Second operand 20 states and 3206 transitions. [2023-08-31 01:09:50,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 714 transitions, 24305 flow [2023-08-31 01:09:52,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 714 transitions, 23230 flow, removed 153 selfloop flow, removed 13 redundant places. [2023-08-31 01:09:52,375 INFO L231 Difference]: Finished difference. Result has 437 places, 638 transitions, 21379 flow [2023-08-31 01:09:52,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=20390, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=21379, PETRI_PLACES=437, PETRI_TRANSITIONS=638} [2023-08-31 01:09:52,376 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 414 predicate places. [2023-08-31 01:09:52,376 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 638 transitions, 21379 flow [2023-08-31 01:09:52,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.78125) internal successors, (5017), 32 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:52,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:52,377 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:52,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-31 01:09:52,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:52,586 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:09:52,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:52,587 INFO L85 PathProgramCache]: Analyzing trace with hash -743395793, now seen corresponding path program 44 times [2023-08-31 01:09:52,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:52,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261629060] [2023-08-31 01:09:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:52,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:53,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:53,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261629060] [2023-08-31 01:09:53,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261629060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:53,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227854632] [2023-08-31 01:09:53,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:09:53,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:53,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:53,185 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:53,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-31 01:09:53,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:09:53,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-31 01:09:53,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:09:53,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:09:53,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:53,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:09:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:53,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:09:54,003 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3471 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3471))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_3471 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3471))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-08-31 01:09:54,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:54,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-08-31 01:09:54,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:54,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-31 01:09:54,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:54,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-08-31 01:09:54,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:09:54,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-31 01:09:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:54,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227854632] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:09:54,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:09:54,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-31 01:09:54,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176008754] [2023-08-31 01:09:54,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:09:54,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 01:09:54,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:09:54,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 01:09:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=657, Unknown=1, NotChecked=52, Total=812 [2023-08-31 01:09:54,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-31 01:09:54,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 638 transitions, 21379 flow. Second operand has 29 states, 29 states have (on average 160.86206896551724) internal successors, (4665), 29 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:54,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:09:54,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-31 01:09:54,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:09:57,789 INFO L130 PetriNetUnfolder]: 2577/4555 cut-off events. [2023-08-31 01:09:57,790 INFO L131 PetriNetUnfolder]: For 265946/265946 co-relation queries the response was YES. [2023-08-31 01:09:57,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70244 conditions, 4555 events. 2577/4555 cut-off events. For 265946/265946 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 31191 event pairs, 436 based on Foata normal form. 8/4563 useless extension candidates. Maximal degree in co-relation 70037. Up to 2551 conditions per place. [2023-08-31 01:09:57,858 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 322 selfloop transitions, 358 changer transitions 8/688 dead transitions. [2023-08-31 01:09:57,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 688 transitions, 23544 flow [2023-08-31 01:09:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:09:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:09:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2946 transitions. [2023-08-31 01:09:57,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346966598500341 [2023-08-31 01:09:57,860 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2946 transitions. [2023-08-31 01:09:57,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2946 transitions. [2023-08-31 01:09:57,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:09:57,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2946 transitions. [2023-08-31 01:09:57,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 163.66666666666666) internal successors, (2946), 18 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:57,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:57,866 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:57,866 INFO L175 Difference]: Start difference. First operand has 437 places, 638 transitions, 21379 flow. Second operand 18 states and 2946 transitions. [2023-08-31 01:09:57,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 688 transitions, 23544 flow [2023-08-31 01:09:58,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 688 transitions, 23042 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-08-31 01:09:59,001 INFO L231 Difference]: Finished difference. Result has 440 places, 635 transitions, 21570 flow [2023-08-31 01:09:59,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=20873, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21570, PETRI_PLACES=440, PETRI_TRANSITIONS=635} [2023-08-31 01:09:59,002 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 417 predicate places. [2023-08-31 01:09:59,002 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 635 transitions, 21570 flow [2023-08-31 01:09:59,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.86206896551724) internal successors, (4665), 29 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:59,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:59,003 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:59,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-31 01:09:59,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:59,203 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:09:59,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash 894158783, now seen corresponding path program 45 times [2023-08-31 01:09:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759341521] [2023-08-31 01:09:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:09:59,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759341521] [2023-08-31 01:09:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759341521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160160356] [2023-08-31 01:09:59,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:09:59,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:59,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:59,755 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:09:59,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-31 01:10:00,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:10:00,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-31 01:10:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:00,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:10:00,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:10:00,384 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:10:00,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:10:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:00,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:01,013 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3542 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3542))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3542 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3542))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-08-31 01:10:01,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:10:01,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-08-31 01:10:01,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:10:01,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-31 01:10:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:01,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160160356] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:01,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:01,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 31 [2023-08-31 01:10:01,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245543751] [2023-08-31 01:10:01,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:01,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:10:01,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:01,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:10:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=817, Unknown=1, NotChecked=58, Total=992 [2023-08-31 01:10:01,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-08-31 01:10:01,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 635 transitions, 21570 flow. Second operand has 32 states, 32 states have (on average 157.78125) internal successors, (5049), 32 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:01,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:01,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-08-31 01:10:01,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:04,099 INFO L130 PetriNetUnfolder]: 2643/4643 cut-off events. [2023-08-31 01:10:04,099 INFO L131 PetriNetUnfolder]: For 264816/264816 co-relation queries the response was YES. [2023-08-31 01:10:04,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72252 conditions, 4643 events. 2643/4643 cut-off events. For 264816/264816 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 31627 event pairs, 228 based on Foata normal form. 20/4663 useless extension candidates. Maximal degree in co-relation 72047. Up to 3016 conditions per place. [2023-08-31 01:10:04,164 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 299 selfloop transitions, 401 changer transitions 2/702 dead transitions. [2023-08-31 01:10:04,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 702 transitions, 24424 flow [2023-08-31 01:10:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:10:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:10:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2739 transitions. [2023-08-31 01:10:04,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32948394081559 [2023-08-31 01:10:04,167 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2739 transitions. [2023-08-31 01:10:04,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2739 transitions. [2023-08-31 01:10:04,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:04,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2739 transitions. [2023-08-31 01:10:04,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 161.11764705882354) internal successors, (2739), 17 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:04,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:04,172 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:04,172 INFO L175 Difference]: Start difference. First operand has 440 places, 635 transitions, 21570 flow. Second operand 17 states and 2739 transitions. [2023-08-31 01:10:04,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 702 transitions, 24424 flow [2023-08-31 01:10:05,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 702 transitions, 23524 flow, removed 13 selfloop flow, removed 19 redundant places. [2023-08-31 01:10:05,355 INFO L231 Difference]: Finished difference. Result has 438 places, 654 transitions, 22878 flow [2023-08-31 01:10:05,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=20681, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=22878, PETRI_PLACES=438, PETRI_TRANSITIONS=654} [2023-08-31 01:10:05,356 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 415 predicate places. [2023-08-31 01:10:05,356 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 654 transitions, 22878 flow [2023-08-31 01:10:05,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 157.78125) internal successors, (5049), 32 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:05,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:05,357 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:05,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:05,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-31 01:10:05,559 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:10:05,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash 269100067, now seen corresponding path program 46 times [2023-08-31 01:10:05,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:05,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30892836] [2023-08-31 01:10:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:06,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:06,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30892836] [2023-08-31 01:10:06,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30892836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:06,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600932319] [2023-08-31 01:10:06,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:10:06,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:06,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:06,042 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:06,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-31 01:10:06,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:10:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:10:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:06,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-08-31 01:10:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:06,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:06,577 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:10:06,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-08-31 01:10:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600932319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:06,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:06,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:10:06,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821154696] [2023-08-31 01:10:06,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:06,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:10:06,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:10:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:10:07,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:10:07,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 654 transitions, 22878 flow. Second operand has 19 states, 19 states have (on average 181.1578947368421) internal successors, (3442), 19 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:07,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:07,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:10:07,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:09,370 INFO L130 PetriNetUnfolder]: 2733/4795 cut-off events. [2023-08-31 01:10:09,370 INFO L131 PetriNetUnfolder]: For 286574/286574 co-relation queries the response was YES. [2023-08-31 01:10:09,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75797 conditions, 4795 events. 2733/4795 cut-off events. For 286574/286574 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 32777 event pairs, 394 based on Foata normal form. 8/4803 useless extension candidates. Maximal degree in co-relation 75591. Up to 2357 conditions per place. [2023-08-31 01:10:09,441 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 320 selfloop transitions, 407 changer transitions 2/729 dead transitions. [2023-08-31 01:10:09,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 729 transitions, 26047 flow [2023-08-31 01:10:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:10:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:10:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2574 transitions. [2023-08-31 01:10:09,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37598597721297106 [2023-08-31 01:10:09,443 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2574 transitions. [2023-08-31 01:10:09,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2574 transitions. [2023-08-31 01:10:09,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:09,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2574 transitions. [2023-08-31 01:10:09,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 183.85714285714286) internal successors, (2574), 14 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:09,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:09,448 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:09,448 INFO L175 Difference]: Start difference. First operand has 438 places, 654 transitions, 22878 flow. Second operand 14 states and 2574 transitions. [2023-08-31 01:10:09,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 729 transitions, 26047 flow [2023-08-31 01:10:10,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 729 transitions, 25507 flow, removed 89 selfloop flow, removed 10 redundant places. [2023-08-31 01:10:10,809 INFO L231 Difference]: Finished difference. Result has 442 places, 670 transitions, 23994 flow [2023-08-31 01:10:10,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=22386, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23994, PETRI_PLACES=442, PETRI_TRANSITIONS=670} [2023-08-31 01:10:10,810 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 419 predicate places. [2023-08-31 01:10:10,810 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 670 transitions, 23994 flow [2023-08-31 01:10:10,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 181.1578947368421) internal successors, (3442), 19 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:10,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:10,811 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:10,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:11,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-31 01:10:11,012 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:10:11,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:11,012 INFO L85 PathProgramCache]: Analyzing trace with hash -580794353, now seen corresponding path program 47 times [2023-08-31 01:10:11,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:11,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45496050] [2023-08-31 01:10:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:11,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:11,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:11,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45496050] [2023-08-31 01:10:11,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45496050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:11,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097454926] [2023-08-31 01:10:11,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:10:11,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:11,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:11,537 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:11,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-31 01:10:11,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:10:11,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:10:11,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:11,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-08-31 01:10:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:12,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:12,153 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:10:12,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-08-31 01:10:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:12,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097454926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:12,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:12,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:10:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983844475] [2023-08-31 01:10:12,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:12,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:10:12,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:10:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:10:12,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:10:12,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 670 transitions, 23994 flow. Second operand has 20 states, 20 states have (on average 181.1) internal successors, (3622), 20 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:12,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:12,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:10:12,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:15,069 INFO L130 PetriNetUnfolder]: 2811/4927 cut-off events. [2023-08-31 01:10:15,069 INFO L131 PetriNetUnfolder]: For 301503/301503 co-relation queries the response was YES. [2023-08-31 01:10:15,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79560 conditions, 4927 events. 2811/4927 cut-off events. For 301503/301503 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 33802 event pairs, 46 based on Foata normal form. 8/4935 useless extension candidates. Maximal degree in co-relation 79355. Up to 1506 conditions per place. [2023-08-31 01:10:15,149 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 220 selfloop transitions, 551 changer transitions 3/774 dead transitions. [2023-08-31 01:10:15,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 774 transitions, 27816 flow [2023-08-31 01:10:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:10:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:10:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3315 transitions. [2023-08-31 01:10:15,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37661895023858216 [2023-08-31 01:10:15,152 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3315 transitions. [2023-08-31 01:10:15,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3315 transitions. [2023-08-31 01:10:15,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:15,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3315 transitions. [2023-08-31 01:10:15,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 184.16666666666666) internal successors, (3315), 18 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:15,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:15,158 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:15,158 INFO L175 Difference]: Start difference. First operand has 442 places, 670 transitions, 23994 flow. Second operand 18 states and 3315 transitions. [2023-08-31 01:10:15,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 774 transitions, 27816 flow [2023-08-31 01:10:16,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 774 transitions, 27749 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-31 01:10:16,769 INFO L231 Difference]: Finished difference. Result has 456 places, 699 transitions, 26302 flow [2023-08-31 01:10:16,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=23927, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=26302, PETRI_PLACES=456, PETRI_TRANSITIONS=699} [2023-08-31 01:10:16,770 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 433 predicate places. [2023-08-31 01:10:16,770 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 699 transitions, 26302 flow [2023-08-31 01:10:16,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.1) internal successors, (3622), 20 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:16,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:16,771 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:16,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:16,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-31 01:10:16,972 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:10:16,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1803978639, now seen corresponding path program 48 times [2023-08-31 01:10:16,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:16,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46660461] [2023-08-31 01:10:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:17,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:17,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46660461] [2023-08-31 01:10:17,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46660461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:17,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673546231] [2023-08-31 01:10:17,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:10:17,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:17,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:17,511 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:17,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-31 01:10:17,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:10:17,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:17,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 01:10:17,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:18,062 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:10:18,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:10:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:18,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:18,505 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:10:18,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-08-31 01:10:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:18,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673546231] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:18,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:18,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2023-08-31 01:10:18,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141661943] [2023-08-31 01:10:18,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:18,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:10:18,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:10:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:10:19,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-31 01:10:19,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 699 transitions, 26302 flow. Second operand has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:19,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:19,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-31 01:10:19,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:22,790 INFO L130 PetriNetUnfolder]: 2941/5165 cut-off events. [2023-08-31 01:10:22,790 INFO L131 PetriNetUnfolder]: For 342959/342959 co-relation queries the response was YES. [2023-08-31 01:10:22,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86521 conditions, 5165 events. 2941/5165 cut-off events. For 342959/342959 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 35801 event pairs, 508 based on Foata normal form. 20/5185 useless extension candidates. Maximal degree in co-relation 86313. Up to 3474 conditions per place. [2023-08-31 01:10:22,870 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 339 selfloop transitions, 436 changer transitions 1/776 dead transitions. [2023-08-31 01:10:22,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 776 transitions, 29679 flow [2023-08-31 01:10:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 01:10:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 01:10:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3818 transitions. [2023-08-31 01:10:22,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717986171973902 [2023-08-31 01:10:22,873 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3818 transitions. [2023-08-31 01:10:22,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3818 transitions. [2023-08-31 01:10:22,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:22,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3818 transitions. [2023-08-31 01:10:22,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 181.8095238095238) internal successors, (3818), 21 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:22,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:22,879 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:22,880 INFO L175 Difference]: Start difference. First operand has 456 places, 699 transitions, 26302 flow. Second operand 21 states and 3818 transitions. [2023-08-31 01:10:22,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 776 transitions, 29679 flow [2023-08-31 01:10:24,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 776 transitions, 29064 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-08-31 01:10:24,391 INFO L231 Difference]: Finished difference. Result has 471 places, 723 transitions, 28173 flow [2023-08-31 01:10:24,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=25736, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=28173, PETRI_PLACES=471, PETRI_TRANSITIONS=723} [2023-08-31 01:10:24,392 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 448 predicate places. [2023-08-31 01:10:24,392 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 723 transitions, 28173 flow [2023-08-31 01:10:24,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:24,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:24,393 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:24,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:24,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-31 01:10:24,594 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:10:24,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:24,594 INFO L85 PathProgramCache]: Analyzing trace with hash 500168355, now seen corresponding path program 49 times [2023-08-31 01:10:24,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:24,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982088854] [2023-08-31 01:10:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:24,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:24,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:24,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982088854] [2023-08-31 01:10:24,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982088854] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:24,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723896098] [2023-08-31 01:10:24,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:10:24,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:24,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:24,997 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:24,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-31 01:10:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:10:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:25,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:25,550 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:10:25,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-08-31 01:10:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:25,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723896098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:25,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:25,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-31 01:10:25,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057390310] [2023-08-31 01:10:25,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:10:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:10:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:10:26,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-31 01:10:26,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 723 transitions, 28173 flow. Second operand has 18 states, 18 states have (on average 183.16666666666666) internal successors, (3297), 18 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:26,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:26,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-31 01:10:26,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:28,521 INFO L130 PetriNetUnfolder]: 3067/5377 cut-off events. [2023-08-31 01:10:28,521 INFO L131 PetriNetUnfolder]: For 363817/363817 co-relation queries the response was YES. [2023-08-31 01:10:28,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92857 conditions, 5377 events. 3067/5377 cut-off events. For 363817/363817 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 37501 event pairs, 42 based on Foata normal form. 8/5385 useless extension candidates. Maximal degree in co-relation 92645. Up to 1740 conditions per place. [2023-08-31 01:10:28,609 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 227 selfloop transitions, 573 changer transitions 3/803 dead transitions. [2023-08-31 01:10:28,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 803 transitions, 31628 flow [2023-08-31 01:10:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:10:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:10:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2426 transitions. [2023-08-31 01:10:28,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816265534056945 [2023-08-31 01:10:28,611 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2426 transitions. [2023-08-31 01:10:28,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2426 transitions. [2023-08-31 01:10:28,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:28,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2426 transitions. [2023-08-31 01:10:28,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 186.6153846153846) internal successors, (2426), 13 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:28,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:28,616 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:28,616 INFO L175 Difference]: Start difference. First operand has 471 places, 723 transitions, 28173 flow. Second operand 13 states and 2426 transitions. [2023-08-31 01:10:28,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 803 transitions, 31628 flow [2023-08-31 01:10:30,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 803 transitions, 31264 flow, removed 93 selfloop flow, removed 8 redundant places. [2023-08-31 01:10:30,357 INFO L231 Difference]: Finished difference. Result has 477 places, 739 transitions, 30092 flow [2023-08-31 01:10:30,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=27831, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=30092, PETRI_PLACES=477, PETRI_TRANSITIONS=739} [2023-08-31 01:10:30,358 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 454 predicate places. [2023-08-31 01:10:30,358 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 739 transitions, 30092 flow [2023-08-31 01:10:30,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.16666666666666) internal successors, (3297), 18 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:30,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:30,359 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:30,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:30,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-31 01:10:30,559 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:10:30,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1784159135, now seen corresponding path program 50 times [2023-08-31 01:10:30,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:30,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815021818] [2023-08-31 01:10:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:30,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:31,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:31,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815021818] [2023-08-31 01:10:31,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815021818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:31,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572259821] [2023-08-31 01:10:31,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:10:31,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:31,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:31,137 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:31,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-31 01:10:31,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:10:31,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:31,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:10:31,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:31,584 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:10:31,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 32 [2023-08-31 01:10:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:31,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:31,736 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:10:31,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:10:31,751 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:10:31,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:10:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:31,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572259821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:31,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:31,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:10:31,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183498255] [2023-08-31 01:10:31,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:31,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:10:31,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:10:31,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:10:32,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:10:32,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 739 transitions, 30092 flow. Second operand has 19 states, 19 states have (on average 181.31578947368422) internal successors, (3445), 19 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:32,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:32,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:10:32,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:34,448 INFO L130 PetriNetUnfolder]: 3059/5369 cut-off events. [2023-08-31 01:10:34,448 INFO L131 PetriNetUnfolder]: For 394082/394082 co-relation queries the response was YES. [2023-08-31 01:10:34,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95229 conditions, 5369 events. 3059/5369 cut-off events. For 394082/394082 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 37492 event pairs, 701 based on Foata normal form. 8/5377 useless extension candidates. Maximal degree in co-relation 95013. Up to 3885 conditions per place. [2023-08-31 01:10:34,540 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 339 selfloop transitions, 418 changer transitions 11/768 dead transitions. [2023-08-31 01:10:34,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 768 transitions, 31835 flow [2023-08-31 01:10:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:10:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:10:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2028 transitions. [2023-08-31 01:10:34,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3770217512548801 [2023-08-31 01:10:34,542 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2028 transitions. [2023-08-31 01:10:34,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2028 transitions. [2023-08-31 01:10:34,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:34,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2028 transitions. [2023-08-31 01:10:34,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.36363636363637) internal successors, (2028), 11 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:34,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:34,545 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:34,545 INFO L175 Difference]: Start difference. First operand has 477 places, 739 transitions, 30092 flow. Second operand 11 states and 2028 transitions. [2023-08-31 01:10:34,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 768 transitions, 31835 flow [2023-08-31 01:10:36,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 768 transitions, 31166 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-31 01:10:36,770 INFO L231 Difference]: Finished difference. Result has 479 places, 735 transitions, 30185 flow [2023-08-31 01:10:36,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=29379, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=30185, PETRI_PLACES=479, PETRI_TRANSITIONS=735} [2023-08-31 01:10:36,771 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 456 predicate places. [2023-08-31 01:10:36,771 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 735 transitions, 30185 flow [2023-08-31 01:10:36,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 181.31578947368422) internal successors, (3445), 19 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:36,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:36,771 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:36,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-08-31 01:10:36,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-31 01:10:36,972 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:10:36,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash 493445207, now seen corresponding path program 51 times [2023-08-31 01:10:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494038543] [2023-08-31 01:10:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:37,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:37,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494038543] [2023-08-31 01:10:37,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494038543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:37,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142322870] [2023-08-31 01:10:37,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:10:37,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:37,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:37,466 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:37,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-31 01:10:37,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:10:37,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:37,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:10:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:37,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:10:37,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-31 01:10:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:37,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:38,166 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:10:38,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-08-31 01:10:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142322870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:38,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:38,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-31 01:10:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577282577] [2023-08-31 01:10:38,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:38,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 01:10:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 01:10:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-31 01:10:39,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-31 01:10:39,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 735 transitions, 30185 flow. Second operand has 22 states, 22 states have (on average 183.0909090909091) internal successors, (4028), 22 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:39,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:39,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-31 01:10:39,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:42,182 INFO L130 PetriNetUnfolder]: 3085/5413 cut-off events. [2023-08-31 01:10:42,182 INFO L131 PetriNetUnfolder]: For 404670/404670 co-relation queries the response was YES. [2023-08-31 01:10:42,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97519 conditions, 5413 events. 3085/5413 cut-off events. For 404670/404670 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 37762 event pairs, 41 based on Foata normal form. 16/5429 useless extension candidates. Maximal degree in co-relation 97303. Up to 1803 conditions per place. [2023-08-31 01:10:42,291 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 276 selfloop transitions, 532 changer transitions 9/817 dead transitions. [2023-08-31 01:10:42,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 817 transitions, 33258 flow [2023-08-31 01:10:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:10:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:10:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3362 transitions. [2023-08-31 01:10:42,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38195864576232674 [2023-08-31 01:10:42,294 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3362 transitions. [2023-08-31 01:10:42,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3362 transitions. [2023-08-31 01:10:42,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:42,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3362 transitions. [2023-08-31 01:10:42,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.77777777777777) internal successors, (3362), 18 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:42,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:42,300 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:42,300 INFO L175 Difference]: Start difference. First operand has 479 places, 735 transitions, 30185 flow. Second operand 18 states and 3362 transitions. [2023-08-31 01:10:42,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 817 transitions, 33258 flow [2023-08-31 01:10:44,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 817 transitions, 33175 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-31 01:10:44,793 INFO L231 Difference]: Finished difference. Result has 491 places, 740 transitions, 31963 flow [2023-08-31 01:10:44,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=30106, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=31963, PETRI_PLACES=491, PETRI_TRANSITIONS=740} [2023-08-31 01:10:44,794 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 468 predicate places. [2023-08-31 01:10:44,794 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 740 transitions, 31963 flow [2023-08-31 01:10:44,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 183.0909090909091) internal successors, (4028), 22 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:44,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:44,795 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:44,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-31 01:10:44,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:44,995 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:10:44,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1780132379, now seen corresponding path program 52 times [2023-08-31 01:10:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:44,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748733586] [2023-08-31 01:10:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:45,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:45,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748733586] [2023-08-31 01:10:45,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748733586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:45,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361566001] [2023-08-31 01:10:45,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:10:45,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:45,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:45,505 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:45,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-31 01:10:45,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:10:45,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:45,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:10:45,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:45,940 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:10:45,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 01:10:45,949 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:10:45,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:10:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:46,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:46,183 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:10:46,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-08-31 01:10:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361566001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:46,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:46,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-31 01:10:46,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641259738] [2023-08-31 01:10:46,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:46,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:10:46,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:10:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:10:47,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:10:47,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 740 transitions, 31963 flow. Second operand has 21 states, 21 states have (on average 182.04761904761904) internal successors, (3823), 21 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:47,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:47,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:10:47,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:50,145 INFO L130 PetriNetUnfolder]: 3169/5543 cut-off events. [2023-08-31 01:10:50,145 INFO L131 PetriNetUnfolder]: For 456865/456865 co-relation queries the response was YES. [2023-08-31 01:10:50,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104206 conditions, 5543 events. 3169/5543 cut-off events. For 456865/456865 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 38701 event pairs, 58 based on Foata normal form. 8/5551 useless extension candidates. Maximal degree in co-relation 103983. Up to 1840 conditions per place. [2023-08-31 01:10:50,246 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 237 selfloop transitions, 589 changer transitions 3/829 dead transitions. [2023-08-31 01:10:50,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 829 transitions, 35492 flow [2023-08-31 01:10:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:10:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:10:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3704 transitions. [2023-08-31 01:10:50,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787321063394683 [2023-08-31 01:10:50,249 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3704 transitions. [2023-08-31 01:10:50,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3704 transitions. [2023-08-31 01:10:50,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:50,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3704 transitions. [2023-08-31 01:10:50,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 185.2) internal successors, (3704), 20 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:50,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:50,256 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:50,256 INFO L175 Difference]: Start difference. First operand has 491 places, 740 transitions, 31963 flow. Second operand 20 states and 3704 transitions. [2023-08-31 01:10:50,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 829 transitions, 35492 flow [2023-08-31 01:10:53,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 829 transitions, 34792 flow, removed 50 selfloop flow, removed 11 redundant places. [2023-08-31 01:10:53,045 INFO L231 Difference]: Finished difference. Result has 500 places, 752 transitions, 33299 flow [2023-08-31 01:10:53,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=31292, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=33299, PETRI_PLACES=500, PETRI_TRANSITIONS=752} [2023-08-31 01:10:53,046 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 477 predicate places. [2023-08-31 01:10:53,046 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 752 transitions, 33299 flow [2023-08-31 01:10:53,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.04761904761904) internal successors, (3823), 21 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:53,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:10:53,047 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:10:53,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-08-31 01:10:53,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:53,255 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:10:53,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:10:53,255 INFO L85 PathProgramCache]: Analyzing trace with hash -66545841, now seen corresponding path program 53 times [2023-08-31 01:10:53,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:10:53,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051008390] [2023-08-31 01:10:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:10:53,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:10:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:10:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:53,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:10:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051008390] [2023-08-31 01:10:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051008390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:10:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192789670] [2023-08-31 01:10:53,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:10:53,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:10:53,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:10:53,701 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:10:53,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-31 01:10:53,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:10:53,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:10:54,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:10:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:10:54,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-08-31 01:10:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:54,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:54,398 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:10:54,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-08-31 01:10:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:10:54,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192789670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:54,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:54,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-31 01:10:54,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981604461] [2023-08-31 01:10:54,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:54,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:10:54,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:54,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:10:54,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:10:55,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:10:55,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 752 transitions, 33299 flow. Second operand has 21 states, 21 states have (on average 181.0952380952381) internal successors, (3803), 21 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:55,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:55,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:10:55,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:58,281 INFO L130 PetriNetUnfolder]: 3373/5871 cut-off events. [2023-08-31 01:10:58,282 INFO L131 PetriNetUnfolder]: For 499866/499866 co-relation queries the response was YES. [2023-08-31 01:10:58,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113547 conditions, 5871 events. 3373/5871 cut-off events. For 499866/499866 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 41095 event pairs, 62 based on Foata normal form. 8/5879 useless extension candidates. Maximal degree in co-relation 113323. Up to 2064 conditions per place. [2023-08-31 01:10:58,396 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 235 selfloop transitions, 602 changer transitions 3/840 dead transitions. [2023-08-31 01:10:58,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 840 transitions, 37439 flow [2023-08-31 01:10:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:10:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:10:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2949 transitions. [2023-08-31 01:10:58,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37691717791411045 [2023-08-31 01:10:58,398 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2949 transitions. [2023-08-31 01:10:58,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2949 transitions. [2023-08-31 01:10:58,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:10:58,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2949 transitions. [2023-08-31 01:10:58,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 184.3125) internal successors, (2949), 16 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:58,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:58,404 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:58,404 INFO L175 Difference]: Start difference. First operand has 500 places, 752 transitions, 33299 flow. Second operand 16 states and 2949 transitions. [2023-08-31 01:10:58,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 840 transitions, 37439 flow [2023-08-31 01:11:01,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 840 transitions, 35812 flow, removed 68 selfloop flow, removed 19 redundant places. [2023-08-31 01:11:01,668 INFO L231 Difference]: Finished difference. Result has 495 places, 769 transitions, 34497 flow [2023-08-31 01:11:01,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=31740, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=34497, PETRI_PLACES=495, PETRI_TRANSITIONS=769} [2023-08-31 01:11:01,668 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 472 predicate places. [2023-08-31 01:11:01,669 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 769 transitions, 34497 flow [2023-08-31 01:11:01,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 181.0952380952381) internal successors, (3803), 21 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:01,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:11:01,669 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:11:01,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-31 01:11:01,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:01,870 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:11:01,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:11:01,870 INFO L85 PathProgramCache]: Analyzing trace with hash -786034555, now seen corresponding path program 54 times [2023-08-31 01:11:01,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:11:01,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263047388] [2023-08-31 01:11:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:11:01,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:11:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:02,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:11:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263047388] [2023-08-31 01:11:02,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263047388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:11:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481584454] [2023-08-31 01:11:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:11:02,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:02,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:11:02,343 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:11:02,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-31 01:11:02,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:11:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:11:02,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:11:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:11:02,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-08-31 01:11:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:03,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:11:03,202 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:11:03,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:11:03,223 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:11:03,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:11:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:03,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481584454] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:11:03,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:11:03,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:11:03,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95012620] [2023-08-31 01:11:03,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:11:03,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:11:03,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:11:03,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:11:03,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:11:03,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:11:03,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 769 transitions, 34497 flow. Second operand has 19 states, 19 states have (on average 181.26315789473685) internal successors, (3444), 19 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:03,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:03,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:11:03,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:11:06,776 INFO L130 PetriNetUnfolder]: 3409/5931 cut-off events. [2023-08-31 01:11:06,777 INFO L131 PetriNetUnfolder]: For 540781/540781 co-relation queries the response was YES. [2023-08-31 01:11:06,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114247 conditions, 5931 events. 3409/5931 cut-off events. For 540781/540781 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 41631 event pairs, 484 based on Foata normal form. 8/5939 useless extension candidates. Maximal degree in co-relation 114025. Up to 2909 conditions per place. [2023-08-31 01:11:06,879 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 326 selfloop transitions, 488 changer transitions 2/816 dead transitions. [2023-08-31 01:11:06,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 816 transitions, 37026 flow [2023-08-31 01:11:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:11:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:11:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2025 transitions. [2023-08-31 01:11:06,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37646402677077523 [2023-08-31 01:11:06,881 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2025 transitions. [2023-08-31 01:11:06,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2025 transitions. [2023-08-31 01:11:06,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:11:06,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2025 transitions. [2023-08-31 01:11:06,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.0909090909091) internal successors, (2025), 11 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:06,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:06,885 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:06,885 INFO L175 Difference]: Start difference. First operand has 495 places, 769 transitions, 34497 flow. Second operand 11 states and 2025 transitions. [2023-08-31 01:11:06,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 816 transitions, 37026 flow [2023-08-31 01:11:09,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 816 transitions, 36359 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-31 01:11:09,853 INFO L231 Difference]: Finished difference. Result has 496 places, 772 transitions, 35438 flow [2023-08-31 01:11:09,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=33830, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=35438, PETRI_PLACES=496, PETRI_TRANSITIONS=772} [2023-08-31 01:11:09,853 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 473 predicate places. [2023-08-31 01:11:09,854 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 772 transitions, 35438 flow [2023-08-31 01:11:09,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 181.26315789473685) internal successors, (3444), 19 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:09,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:11:09,854 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:11:09,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-31 01:11:10,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-08-31 01:11:10,055 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:11:10,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:11:10,055 INFO L85 PathProgramCache]: Analyzing trace with hash -6719081, now seen corresponding path program 55 times [2023-08-31 01:11:10,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:11:10,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067177163] [2023-08-31 01:11:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:11:10,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:11:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-31 01:11:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:11:11,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067177163] [2023-08-31 01:11:11,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067177163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:11:11,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986091000] [2023-08-31 01:11:11,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:11:11,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:11,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:11:11,087 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:11:11,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-31 01:11:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:11,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:11:11,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:11:11,564 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:11:11,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 01:11:11,572 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:11:11,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:11:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:11,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:11:11,814 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:11:11,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-08-31 01:11:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:11,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986091000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:11:11,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:11:11,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 28 [2023-08-31 01:11:11,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607638342] [2023-08-31 01:11:11,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:11:11,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:11:11,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:11:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:11:11,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-08-31 01:11:13,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 489 [2023-08-31 01:11:13,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 772 transitions, 35438 flow. Second operand has 28 states, 28 states have (on average 168.89285714285714) internal successors, (4729), 28 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:13,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:13,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 489 [2023-08-31 01:11:13,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:11:19,217 INFO L130 PetriNetUnfolder]: 3529/6143 cut-off events. [2023-08-31 01:11:19,217 INFO L131 PetriNetUnfolder]: For 600159/600159 co-relation queries the response was YES. [2023-08-31 01:11:19,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121155 conditions, 6143 events. 3529/6143 cut-off events. For 600159/600159 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 43400 event pairs, 462 based on Foata normal form. 8/6151 useless extension candidates. Maximal degree in co-relation 120931. Up to 2232 conditions per place. [2023-08-31 01:11:19,335 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 471 selfloop transitions, 860 changer transitions 8/1339 dead transitions. [2023-08-31 01:11:19,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1339 transitions, 62823 flow [2023-08-31 01:11:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-31 01:11:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-31 01:11:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 7893 transitions. [2023-08-31 01:11:19,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508935716190984 [2023-08-31 01:11:19,339 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 7893 transitions. [2023-08-31 01:11:19,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 7893 transitions. [2023-08-31 01:11:19,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:11:19,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 7893 transitions. [2023-08-31 01:11:19,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 171.58695652173913) internal successors, (7893), 46 states have internal predecessors, (7893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:19,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 489.0) internal successors, (22983), 47 states have internal predecessors, (22983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:19,354 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 489.0) internal successors, (22983), 47 states have internal predecessors, (22983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:19,354 INFO L175 Difference]: Start difference. First operand has 496 places, 772 transitions, 35438 flow. Second operand 46 states and 7893 transitions. [2023-08-31 01:11:19,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1339 transitions, 62823 flow [2023-08-31 01:11:23,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1339 transitions, 62422 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-31 01:11:23,323 INFO L231 Difference]: Finished difference. Result has 541 places, 1118 transitions, 59139 flow [2023-08-31 01:11:23,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=35209, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=59139, PETRI_PLACES=541, PETRI_TRANSITIONS=1118} [2023-08-31 01:11:23,324 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 518 predicate places. [2023-08-31 01:11:23,324 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1118 transitions, 59139 flow [2023-08-31 01:11:23,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 168.89285714285714) internal successors, (4729), 28 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:23,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:11:23,325 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:11:23,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-31 01:11:23,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-08-31 01:11:23,526 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:11:23,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:11:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1431569059, now seen corresponding path program 56 times [2023-08-31 01:11:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:11:23,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862969865] [2023-08-31 01:11:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:11:23,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:11:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:24,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:11:24,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862969865] [2023-08-31 01:11:24,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862969865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:11:24,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437923442] [2023-08-31 01:11:24,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:11:24,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:24,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:11:24,140 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:11:24,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-31 01:11:24,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:11:24,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:11:24,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:11:24,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:11:24,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:11:24,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-31 01:11:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:24,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:11:24,805 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:11:24,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:11:24,826 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:11:24,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:11:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437923442] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:11:24,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:11:24,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:11:24,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367742997] [2023-08-31 01:11:24,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:11:24,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:11:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:11:24,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:11:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:11:25,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:11:25,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1118 transitions, 59139 flow. Second operand has 20 states, 20 states have (on average 181.05) internal successors, (3621), 20 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:25,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:25,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:11:25,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:11:29,312 INFO L130 PetriNetUnfolder]: 3577/6235 cut-off events. [2023-08-31 01:11:29,312 INFO L131 PetriNetUnfolder]: For 672078/672078 co-relation queries the response was YES. [2023-08-31 01:11:29,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126380 conditions, 6235 events. 3577/6235 cut-off events. For 672078/672078 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 43974 event pairs, 520 based on Foata normal form. 8/6243 useless extension candidates. Maximal degree in co-relation 126133. Up to 3011 conditions per place. [2023-08-31 01:11:29,431 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 339 selfloop transitions, 837 changer transitions 3/1179 dead transitions. [2023-08-31 01:11:29,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1179 transitions, 62861 flow [2023-08-31 01:11:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:11:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:11:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2397 transitions. [2023-08-31 01:11:29,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37706465313827275 [2023-08-31 01:11:29,433 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2397 transitions. [2023-08-31 01:11:29,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2397 transitions. [2023-08-31 01:11:29,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:11:29,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2397 transitions. [2023-08-31 01:11:29,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 184.3846153846154) internal successors, (2397), 13 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:29,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:29,438 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:29,438 INFO L175 Difference]: Start difference. First operand has 541 places, 1118 transitions, 59139 flow. Second operand 13 states and 2397 transitions. [2023-08-31 01:11:29,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1179 transitions, 62861 flow [2023-08-31 01:11:33,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1179 transitions, 62535 flow, removed 64 selfloop flow, removed 18 redundant places. [2023-08-31 01:11:33,705 INFO L231 Difference]: Finished difference. Result has 537 places, 1126 transitions, 61810 flow [2023-08-31 01:11:33,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=58817, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=61810, PETRI_PLACES=537, PETRI_TRANSITIONS=1126} [2023-08-31 01:11:33,707 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 514 predicate places. [2023-08-31 01:11:33,707 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1126 transitions, 61810 flow [2023-08-31 01:11:33,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.05) internal successors, (3621), 20 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:33,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:11:33,707 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:11:33,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-31 01:11:33,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:33,908 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:11:33,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:11:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1418744525, now seen corresponding path program 57 times [2023-08-31 01:11:33,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:11:33,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71271762] [2023-08-31 01:11:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:11:33,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:11:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:34,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:11:34,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71271762] [2023-08-31 01:11:34,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71271762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:11:34,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849857449] [2023-08-31 01:11:34,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:11:34,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:34,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:11:34,336 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:11:34,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-31 01:11:34,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:11:34,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:11:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:11:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:11:34,728 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 01:11:34,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 01:11:34,735 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:11:34,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:11:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:34,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:11:34,952 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:11:34,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:11:34,968 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:11:34,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:11:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:34,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849857449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:11:34,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:11:34,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:11:34,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565981540] [2023-08-31 01:11:34,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:11:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:11:34,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:11:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:11:34,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:11:35,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:11:35,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1126 transitions, 61810 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:35,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:35,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:11:35,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:11:40,018 INFO L130 PetriNetUnfolder]: 3573/6239 cut-off events. [2023-08-31 01:11:40,018 INFO L131 PetriNetUnfolder]: For 719263/719263 co-relation queries the response was YES. [2023-08-31 01:11:40,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129454 conditions, 6239 events. 3573/6239 cut-off events. For 719263/719263 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 44096 event pairs, 559 based on Foata normal form. 16/6255 useless extension candidates. Maximal degree in co-relation 129216. Up to 3265 conditions per place. [2023-08-31 01:11:40,129 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 414 selfloop transitions, 762 changer transitions 9/1185 dead transitions. [2023-08-31 01:11:40,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1185 transitions, 65234 flow [2023-08-31 01:11:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:11:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:11:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2597 transitions. [2023-08-31 01:11:40,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37934560327198363 [2023-08-31 01:11:40,131 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2597 transitions. [2023-08-31 01:11:40,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2597 transitions. [2023-08-31 01:11:40,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:11:40,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2597 transitions. [2023-08-31 01:11:40,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.5) internal successors, (2597), 14 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:40,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:40,136 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:40,136 INFO L175 Difference]: Start difference. First operand has 537 places, 1126 transitions, 61810 flow. Second operand 14 states and 2597 transitions. [2023-08-31 01:11:40,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1185 transitions, 65234 flow [2023-08-31 01:11:44,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 1185 transitions, 64919 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-31 01:11:44,313 INFO L231 Difference]: Finished difference. Result has 544 places, 1128 transitions, 63164 flow [2023-08-31 01:11:44,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=61495, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=63164, PETRI_PLACES=544, PETRI_TRANSITIONS=1128} [2023-08-31 01:11:44,315 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 521 predicate places. [2023-08-31 01:11:44,315 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1128 transitions, 63164 flow [2023-08-31 01:11:44,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:44,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:11:44,316 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:11:44,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-31 01:11:44,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:44,525 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:11:44,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:11:44,525 INFO L85 PathProgramCache]: Analyzing trace with hash -690956509, now seen corresponding path program 58 times [2023-08-31 01:11:44,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:11:44,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450177559] [2023-08-31 01:11:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:11:44,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:11:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-31 01:11:45,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:11:45,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450177559] [2023-08-31 01:11:45,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450177559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:11:45,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052611210] [2023-08-31 01:11:45,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:11:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:11:45,368 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:11:45,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-31 01:11:45,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:11:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:11:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:11:45,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:11:45,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:11:45,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:11:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:45,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:11:46,148 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:11:46,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:11:46,165 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:11:46,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:11:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:46,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052611210] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:11:46,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:11:46,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 28 [2023-08-31 01:11:46,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816631073] [2023-08-31 01:11:46,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:11:46,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:11:46,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:11:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:11:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-08-31 01:11:47,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 489 [2023-08-31 01:11:47,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1128 transitions, 63164 flow. Second operand has 28 states, 28 states have (on average 173.03571428571428) internal successors, (4845), 28 states have internal predecessors, (4845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:47,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:47,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 489 [2023-08-31 01:11:47,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:11:51,954 INFO L130 PetriNetUnfolder]: 3535/6141 cut-off events. [2023-08-31 01:11:51,955 INFO L131 PetriNetUnfolder]: For 741398/741398 co-relation queries the response was YES. [2023-08-31 01:11:52,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130366 conditions, 6141 events. 3535/6141 cut-off events. For 741398/741398 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 43006 event pairs, 547 based on Foata normal form. 8/6149 useless extension candidates. Maximal degree in co-relation 130126. Up to 3230 conditions per place. [2023-08-31 01:11:52,184 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 392 selfloop transitions, 777 changer transitions 8/1177 dead transitions. [2023-08-31 01:11:52,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 1177 transitions, 66242 flow [2023-08-31 01:11:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:11:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:11:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3156 transitions. [2023-08-31 01:11:52,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35855487389229723 [2023-08-31 01:11:52,186 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3156 transitions. [2023-08-31 01:11:52,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3156 transitions. [2023-08-31 01:11:52,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:11:52,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3156 transitions. [2023-08-31 01:11:52,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 175.33333333333334) internal successors, (3156), 18 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:52,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:52,192 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:52,192 INFO L175 Difference]: Start difference. First operand has 544 places, 1128 transitions, 63164 flow. Second operand 18 states and 3156 transitions. [2023-08-31 01:11:52,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 1177 transitions, 66242 flow [2023-08-31 01:11:56,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 1177 transitions, 65497 flow, removed 46 selfloop flow, removed 38 redundant places. [2023-08-31 01:11:56,326 INFO L231 Difference]: Finished difference. Result has 522 places, 1125 transitions, 63906 flow [2023-08-31 01:11:56,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=62374, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=63906, PETRI_PLACES=522, PETRI_TRANSITIONS=1125} [2023-08-31 01:11:56,328 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 499 predicate places. [2023-08-31 01:11:56,328 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1125 transitions, 63906 flow [2023-08-31 01:11:56,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.03571428571428) internal successors, (4845), 28 states have internal predecessors, (4845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:56,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:11:56,329 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:11:56,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-08-31 01:11:56,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-31 01:11:56,530 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:11:56,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:11:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash 87706125, now seen corresponding path program 59 times [2023-08-31 01:11:56,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:11:56,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695647485] [2023-08-31 01:11:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:11:56,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:11:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:11:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:56,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:11:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695647485] [2023-08-31 01:11:56,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695647485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:11:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123813077] [2023-08-31 01:11:56,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:11:56,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:11:56,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:11:56,974 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:11:56,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-31 01:11:57,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:11:57,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:11:57,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:11:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:11:57,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:11:57,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-31 01:11:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:57,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:11:57,699 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:11:57,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:11:57,715 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:11:57,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:11:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:11:57,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123813077] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:11:57,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:11:57,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:11:57,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829883249] [2023-08-31 01:11:57,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:11:57,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:11:57,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:11:57,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:11:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:11:58,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:11:58,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1125 transitions, 63906 flow. Second operand has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:11:58,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:11:58,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:11:58,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:12:02,440 INFO L130 PetriNetUnfolder]: 3535/6119 cut-off events. [2023-08-31 01:12:02,441 INFO L131 PetriNetUnfolder]: For 772789/772789 co-relation queries the response was YES. [2023-08-31 01:12:02,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131899 conditions, 6119 events. 3535/6119 cut-off events. For 772789/772789 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 42641 event pairs, 474 based on Foata normal form. 8/6127 useless extension candidates. Maximal degree in co-relation 131680. Up to 2895 conditions per place. [2023-08-31 01:12:02,564 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 337 selfloop transitions, 843 changer transitions 2/1182 dead transitions. [2023-08-31 01:12:02,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1182 transitions, 67558 flow [2023-08-31 01:12:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:12:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:12:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2757 transitions. [2023-08-31 01:12:02,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3758691206543967 [2023-08-31 01:12:02,567 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2757 transitions. [2023-08-31 01:12:02,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2757 transitions. [2023-08-31 01:12:02,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:12:02,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2757 transitions. [2023-08-31 01:12:02,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.8) internal successors, (2757), 15 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:02,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:02,572 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:02,572 INFO L175 Difference]: Start difference. First operand has 522 places, 1125 transitions, 63906 flow. Second operand 15 states and 2757 transitions. [2023-08-31 01:12:02,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1182 transitions, 67558 flow [2023-08-31 01:12:06,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1182 transitions, 67127 flow, removed 82 selfloop flow, removed 17 redundant places. [2023-08-31 01:12:06,783 INFO L231 Difference]: Finished difference. Result has 518 places, 1132 transitions, 65756 flow [2023-08-31 01:12:06,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=63494, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=835, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=65756, PETRI_PLACES=518, PETRI_TRANSITIONS=1132} [2023-08-31 01:12:06,784 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 495 predicate places. [2023-08-31 01:12:06,784 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1132 transitions, 65756 flow [2023-08-31 01:12:06,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:06,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:12:06,807 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:12:06,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-31 01:12:07,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-31 01:12:07,007 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:12:07,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:12:07,008 INFO L85 PathProgramCache]: Analyzing trace with hash 3984547, now seen corresponding path program 60 times [2023-08-31 01:12:07,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:12:07,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007650124] [2023-08-31 01:12:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:12:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:12:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:12:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:07,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:12:07,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007650124] [2023-08-31 01:12:07,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007650124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:12:07,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492113904] [2023-08-31 01:12:07,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:12:07,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:07,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:12:07,508 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:12:07,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-31 01:12:07,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:12:07,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:12:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:12:07,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:12:07,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:12:07,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-31 01:12:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:08,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:12:08,233 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:12:08,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-08-31 01:12:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492113904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:12:08,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:12:08,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-31 01:12:08,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691195776] [2023-08-31 01:12:08,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:12:08,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:12:08,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:12:08,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:12:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:12:08,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-31 01:12:08,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1132 transitions, 65756 flow. Second operand has 21 states, 21 states have (on average 183.04761904761904) internal successors, (3844), 21 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:08,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:12:08,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-31 01:12:08,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:12:13,021 INFO L130 PetriNetUnfolder]: 3515/6079 cut-off events. [2023-08-31 01:12:13,021 INFO L131 PetriNetUnfolder]: For 786863/786863 co-relation queries the response was YES. [2023-08-31 01:12:13,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132632 conditions, 6079 events. 3515/6079 cut-off events. For 786863/786863 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 42260 event pairs, 497 based on Foata normal form. 8/6087 useless extension candidates. Maximal degree in co-relation 132420. Up to 3001 conditions per place. [2023-08-31 01:12:13,267 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 414 selfloop transitions, 765 changer transitions 9/1188 dead transitions. [2023-08-31 01:12:13,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 1188 transitions, 68878 flow [2023-08-31 01:12:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:12:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:12:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3161 transitions. [2023-08-31 01:12:13,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38024780464332975 [2023-08-31 01:12:13,270 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3161 transitions. [2023-08-31 01:12:13,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3161 transitions. [2023-08-31 01:12:13,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:12:13,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3161 transitions. [2023-08-31 01:12:13,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 185.94117647058823) internal successors, (3161), 17 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:13,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:13,276 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:13,276 INFO L175 Difference]: Start difference. First operand has 518 places, 1132 transitions, 65756 flow. Second operand 17 states and 3161 transitions. [2023-08-31 01:12:13,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 1188 transitions, 68878 flow [2023-08-31 01:12:17,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 1188 transitions, 67874 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-08-31 01:12:17,325 INFO L231 Difference]: Finished difference. Result has 523 places, 1128 transitions, 66202 flow [2023-08-31 01:12:17,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=64714, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=765, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=66202, PETRI_PLACES=523, PETRI_TRANSITIONS=1128} [2023-08-31 01:12:17,326 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 500 predicate places. [2023-08-31 01:12:17,327 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1128 transitions, 66202 flow [2023-08-31 01:12:17,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 183.04761904761904) internal successors, (3844), 21 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:17,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:12:17,327 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:12:17,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-31 01:12:17,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:17,528 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:12:17,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:12:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1213677715, now seen corresponding path program 61 times [2023-08-31 01:12:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:12:17,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869475112] [2023-08-31 01:12:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:12:17,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:12:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:12:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:17,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:12:17,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869475112] [2023-08-31 01:12:17,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869475112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:12:17,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043155377] [2023-08-31 01:12:17,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:12:17,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:12:17,978 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:12:17,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-31 01:12:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:12:18,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:12:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:12:18,424 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:12:18,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-08-31 01:12:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:18,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:12:18,572 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:12:18,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:12:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:18,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043155377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:12:18,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:12:18,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-31 01:12:18,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010664550] [2023-08-31 01:12:18,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:12:18,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:12:18,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:12:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:12:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:12:19,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-31 01:12:19,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1128 transitions, 66202 flow. Second operand has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:19,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:12:19,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-31 01:12:19,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:12:23,417 INFO L130 PetriNetUnfolder]: 3873/6741 cut-off events. [2023-08-31 01:12:23,417 INFO L131 PetriNetUnfolder]: For 822544/822544 co-relation queries the response was YES. [2023-08-31 01:12:23,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144582 conditions, 6741 events. 3873/6741 cut-off events. For 822544/822544 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 47707 event pairs, 460 based on Foata normal form. 24/6765 useless extension candidates. Maximal degree in co-relation 144396. Up to 2376 conditions per place. [2023-08-31 01:12:23,537 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 760 selfloop transitions, 561 changer transitions 2/1323 dead transitions. [2023-08-31 01:12:23,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 1323 transitions, 76691 flow [2023-08-31 01:12:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:12:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:12:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2256 transitions. [2023-08-31 01:12:23,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38445807770961143 [2023-08-31 01:12:23,539 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2256 transitions. [2023-08-31 01:12:23,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2256 transitions. [2023-08-31 01:12:23,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:12:23,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2256 transitions. [2023-08-31 01:12:23,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.0) internal successors, (2256), 12 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:23,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:23,543 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:23,543 INFO L175 Difference]: Start difference. First operand has 523 places, 1128 transitions, 66202 flow. Second operand 12 states and 2256 transitions. [2023-08-31 01:12:23,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 1323 transitions, 76691 flow [2023-08-31 01:12:28,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1323 transitions, 75274 flow, removed 14 selfloop flow, removed 16 redundant places. [2023-08-31 01:12:28,530 INFO L231 Difference]: Finished difference. Result has 513 places, 1153 transitions, 67204 flow [2023-08-31 01:12:28,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=64884, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=536, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=67204, PETRI_PLACES=513, PETRI_TRANSITIONS=1153} [2023-08-31 01:12:28,531 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 490 predicate places. [2023-08-31 01:12:28,531 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1153 transitions, 67204 flow [2023-08-31 01:12:28,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:28,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:12:28,532 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:12:28,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-31 01:12:28,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-31 01:12:28,733 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:12:28,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:12:28,733 INFO L85 PathProgramCache]: Analyzing trace with hash 332522005, now seen corresponding path program 62 times [2023-08-31 01:12:28,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:12:28,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448661772] [2023-08-31 01:12:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:12:28,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:12:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:12:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:29,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:12:29,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448661772] [2023-08-31 01:12:29,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448661772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:12:29,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344217997] [2023-08-31 01:12:29,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:12:29,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:29,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:12:29,237 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:12:29,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-31 01:12:29,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:12:29,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:12:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 01:12:29,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:12:29,824 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:12:29,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:12:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:29,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:12:30,192 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:12:30,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:12:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:30,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344217997] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:12:30,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:12:30,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 26 [2023-08-31 01:12:30,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052130240] [2023-08-31 01:12:30,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:12:30,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 01:12:30,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:12:30,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 01:12:30,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:12:31,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-31 01:12:31,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1153 transitions, 67204 flow. Second operand has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:31,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:12:31,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-31 01:12:31,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:12:36,544 INFO L130 PetriNetUnfolder]: 4029/7017 cut-off events. [2023-08-31 01:12:36,544 INFO L131 PetriNetUnfolder]: For 848666/848666 co-relation queries the response was YES. [2023-08-31 01:12:36,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149358 conditions, 7017 events. 4029/7017 cut-off events. For 848666/848666 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 50053 event pairs, 170 based on Foata normal form. 44/7061 useless extension candidates. Maximal degree in co-relation 149142. Up to 2914 conditions per place. [2023-08-31 01:12:36,689 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 409 selfloop transitions, 890 changer transitions 2/1301 dead transitions. [2023-08-31 01:12:36,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 1301 transitions, 74127 flow [2023-08-31 01:12:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 01:12:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 01:12:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4384 transitions. [2023-08-31 01:12:36,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37355146557600544 [2023-08-31 01:12:36,693 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4384 transitions. [2023-08-31 01:12:36,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4384 transitions. [2023-08-31 01:12:36,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:12:36,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4384 transitions. [2023-08-31 01:12:36,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 182.66666666666666) internal successors, (4384), 24 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) [2023-08-31 01:12:36,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:36,701 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:36,702 INFO L175 Difference]: Start difference. First operand has 513 places, 1153 transitions, 67204 flow. Second operand 24 states and 4384 transitions. [2023-08-31 01:12:36,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 1301 transitions, 74127 flow [2023-08-31 01:12:42,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1301 transitions, 73676 flow, removed 80 selfloop flow, removed 8 redundant places. [2023-08-31 01:12:42,331 INFO L231 Difference]: Finished difference. Result has 536 places, 1218 transitions, 72496 flow [2023-08-31 01:12:42,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=66753, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=72496, PETRI_PLACES=536, PETRI_TRANSITIONS=1218} [2023-08-31 01:12:42,332 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 513 predicate places. [2023-08-31 01:12:42,332 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 1218 transitions, 72496 flow [2023-08-31 01:12:42,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:42,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:12:42,333 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:12:42,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-31 01:12:42,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:42,534 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:12:42,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:12:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash 825323069, now seen corresponding path program 63 times [2023-08-31 01:12:42,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:12:42,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030934379] [2023-08-31 01:12:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:12:42,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:12:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:12:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:43,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:12:43,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030934379] [2023-08-31 01:12:43,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030934379] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:12:43,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165522054] [2023-08-31 01:12:43,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:12:43,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:43,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:12:43,120 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:12:43,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-31 01:12:43,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:12:43,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:12:43,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:12:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:12:43,687 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:12:43,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 23 [2023-08-31 01:12:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:43,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:12:43,876 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:12:43,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:12:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165522054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:12:43,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:12:43,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-31 01:12:43,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743976201] [2023-08-31 01:12:43,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:12:43,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:12:43,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:12:43,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:12:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:12:44,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:12:44,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1218 transitions, 72496 flow. Second operand has 19 states, 19 states have (on average 181.31578947368422) internal successors, (3445), 19 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:44,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:12:44,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:12:44,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:12:49,091 INFO L130 PetriNetUnfolder]: 4073/7093 cut-off events. [2023-08-31 01:12:49,091 INFO L131 PetriNetUnfolder]: For 982930/982930 co-relation queries the response was YES. [2023-08-31 01:12:49,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154291 conditions, 7093 events. 4073/7093 cut-off events. For 982930/982930 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 50897 event pairs, 1486 based on Foata normal form. 24/7117 useless extension candidates. Maximal degree in co-relation 154066. Up to 6313 conditions per place. [2023-08-31 01:12:49,222 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 1060 selfloop transitions, 197 changer transitions 1/1258 dead transitions. [2023-08-31 01:12:49,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 1258 transitions, 76122 flow [2023-08-31 01:12:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:12:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:12:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1849 transitions. [2023-08-31 01:12:49,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37811860940695297 [2023-08-31 01:12:49,224 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1849 transitions. [2023-08-31 01:12:49,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1849 transitions. [2023-08-31 01:12:49,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:12:49,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1849 transitions. [2023-08-31 01:12:49,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.9) internal successors, (1849), 10 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:49,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:49,228 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:49,228 INFO L175 Difference]: Start difference. First operand has 536 places, 1218 transitions, 72496 flow. Second operand 10 states and 1849 transitions. [2023-08-31 01:12:49,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 1258 transitions, 76122 flow [2023-08-31 01:12:54,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1258 transitions, 75296 flow, removed 240 selfloop flow, removed 11 redundant places. [2023-08-31 01:12:54,833 INFO L231 Difference]: Finished difference. Result has 536 places, 1226 transitions, 72400 flow [2023-08-31 01:12:54,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=71548, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1019, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=72400, PETRI_PLACES=536, PETRI_TRANSITIONS=1226} [2023-08-31 01:12:54,835 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 513 predicate places. [2023-08-31 01:12:54,835 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 1226 transitions, 72400 flow [2023-08-31 01:12:54,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 181.31578947368422) internal successors, (3445), 19 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:54,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:12:54,835 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:12:54,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-31 01:12:55,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:55,036 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:12:55,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:12:55,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1936515247, now seen corresponding path program 64 times [2023-08-31 01:12:55,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:12:55,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765959535] [2023-08-31 01:12:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:12:55,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:12:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:12:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:55,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:12:55,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765959535] [2023-08-31 01:12:55,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765959535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:12:55,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453500115] [2023-08-31 01:12:55,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:12:55,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:12:55,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:12:55,572 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:12:55,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-31 01:12:55,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:12:55,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:12:55,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:12:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:12:56,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:12:56,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:12:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:56,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:12:56,314 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:12:56,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:12:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:12:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453500115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:12:56,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:12:56,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-31 01:12:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143355411] [2023-08-31 01:12:56,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:12:56,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:12:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:12:56,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:12:56,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:12:57,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:12:57,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1226 transitions, 72400 flow. Second operand has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:12:57,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:12:57,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:12:57,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:13:02,179 INFO L130 PetriNetUnfolder]: 4103/7179 cut-off events. [2023-08-31 01:13:02,179 INFO L131 PetriNetUnfolder]: For 981551/981551 co-relation queries the response was YES. [2023-08-31 01:13:02,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155345 conditions, 7179 events. 4103/7179 cut-off events. For 981551/981551 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 51810 event pairs, 1494 based on Foata normal form. 20/7199 useless extension candidates. Maximal degree in co-relation 155122. Up to 6367 conditions per place. [2023-08-31 01:13:02,308 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 1063 selfloop transitions, 206 changer transitions 1/1270 dead transitions. [2023-08-31 01:13:02,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1270 transitions, 76113 flow [2023-08-31 01:13:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:13:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:13:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2413 transitions. [2023-08-31 01:13:02,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3795815636306434 [2023-08-31 01:13:02,310 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2413 transitions. [2023-08-31 01:13:02,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2413 transitions. [2023-08-31 01:13:02,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:13:02,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2413 transitions. [2023-08-31 01:13:02,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.6153846153846) internal successors, (2413), 13 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:02,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:02,314 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:02,314 INFO L175 Difference]: Start difference. First operand has 536 places, 1226 transitions, 72400 flow. Second operand 13 states and 2413 transitions. [2023-08-31 01:13:02,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1270 transitions, 76113 flow [2023-08-31 01:13:08,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 1270 transitions, 75589 flow, removed 78 selfloop flow, removed 6 redundant places. [2023-08-31 01:13:08,117 INFO L231 Difference]: Finished difference. Result has 546 places, 1235 transitions, 72866 flow [2023-08-31 01:13:08,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=71876, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1022, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=72866, PETRI_PLACES=546, PETRI_TRANSITIONS=1235} [2023-08-31 01:13:08,118 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 523 predicate places. [2023-08-31 01:13:08,118 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 1235 transitions, 72866 flow [2023-08-31 01:13:08,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:08,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:13:08,119 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:13:08,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-31 01:13:08,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-08-31 01:13:08,320 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:13:08,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:13:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash -899344941, now seen corresponding path program 65 times [2023-08-31 01:13:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:13:08,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608667788] [2023-08-31 01:13:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:13:08,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:13:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:09,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:13:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608667788] [2023-08-31 01:13:09,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608667788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:13:09,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204780661] [2023-08-31 01:13:09,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:13:09,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:13:09,061 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:13:09,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-31 01:13:09,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:13:09,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:13:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:13:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:13:09,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:13:09,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-31 01:13:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:09,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:13:09,979 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-31 01:13:09,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-31 01:13:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:10,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204780661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:13:10,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:13:10,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:13:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3050094] [2023-08-31 01:13:10,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:13:10,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:13:10,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:13:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:13:10,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:13:10,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-31 01:13:10,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 1235 transitions, 72866 flow. Second operand has 20 states, 20 states have (on average 183.1) internal successors, (3662), 20 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:10,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:13:10,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-31 01:13:10,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:13:15,128 INFO L130 PetriNetUnfolder]: 4085/7117 cut-off events. [2023-08-31 01:13:15,128 INFO L131 PetriNetUnfolder]: For 979630/979630 co-relation queries the response was YES. [2023-08-31 01:13:15,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154195 conditions, 7117 events. 4085/7117 cut-off events. For 979630/979630 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 51129 event pairs, 1495 based on Foata normal form. 4/7121 useless extension candidates. Maximal degree in co-relation 153968. Up to 6393 conditions per place. [2023-08-31 01:13:15,261 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 1048 selfloop transitions, 193 changer transitions 3/1244 dead transitions. [2023-08-31 01:13:15,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1244 transitions, 74954 flow [2023-08-31 01:13:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:13:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:13:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1678 transitions. [2023-08-31 01:13:15,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38127698250397635 [2023-08-31 01:13:15,263 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1678 transitions. [2023-08-31 01:13:15,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1678 transitions. [2023-08-31 01:13:15,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:13:15,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1678 transitions. [2023-08-31 01:13:15,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 186.44444444444446) internal successors, (1678), 9 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:15,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:15,266 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:15,266 INFO L175 Difference]: Start difference. First operand has 546 places, 1235 transitions, 72866 flow. Second operand 9 states and 1678 transitions. [2023-08-31 01:13:15,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1244 transitions, 74954 flow [2023-08-31 01:13:20,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 1244 transitions, 74464 flow, removed 52 selfloop flow, removed 8 redundant places. [2023-08-31 01:13:20,688 INFO L231 Difference]: Finished difference. Result has 544 places, 1228 transitions, 72234 flow [2023-08-31 01:13:20,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=71860, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1036, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=72234, PETRI_PLACES=544, PETRI_TRANSITIONS=1228} [2023-08-31 01:13:20,690 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 521 predicate places. [2023-08-31 01:13:20,690 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1228 transitions, 72234 flow [2023-08-31 01:13:20,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 183.1) internal successors, (3662), 20 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:20,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:13:20,690 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:13:20,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-31 01:13:20,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:20,891 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:13:20,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:13:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -287115501, now seen corresponding path program 66 times [2023-08-31 01:13:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:13:20,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594780988] [2023-08-31 01:13:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:13:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:13:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:13:21,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594780988] [2023-08-31 01:13:21,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594780988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:13:21,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415024153] [2023-08-31 01:13:21,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:13:21,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:21,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:13:21,461 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:13:21,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-31 01:13:21,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:13:21,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:13:21,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 01:13:21,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:13:22,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:13:22,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-31 01:13:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:22,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:13:22,320 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:13:22,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:13:22,355 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:13:22,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:13:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:22,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415024153] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:13:22,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:13:22,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-31 01:13:22,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100976827] [2023-08-31 01:13:22,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:13:22,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:13:22,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:13:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:13:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:13:23,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:13:23,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1228 transitions, 72234 flow. Second operand has 21 states, 21 states have (on average 182.14285714285714) internal successors, (3825), 21 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:23,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:13:23,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:13:23,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:13:28,193 INFO L130 PetriNetUnfolder]: 4117/7201 cut-off events. [2023-08-31 01:13:28,193 INFO L131 PetriNetUnfolder]: For 969950/969950 co-relation queries the response was YES. [2023-08-31 01:13:28,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155330 conditions, 7201 events. 4117/7201 cut-off events. For 969950/969950 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 52029 event pairs, 602 based on Foata normal form. 16/7217 useless extension candidates. Maximal degree in co-relation 155104. Up to 3615 conditions per place. [2023-08-31 01:13:28,322 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 488 selfloop transitions, 795 changer transitions 4/1287 dead transitions. [2023-08-31 01:13:28,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 1287 transitions, 75902 flow [2023-08-31 01:13:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:13:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:13:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2964 transitions. [2023-08-31 01:13:28,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37883435582822084 [2023-08-31 01:13:28,325 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2964 transitions. [2023-08-31 01:13:28,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2964 transitions. [2023-08-31 01:13:28,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:13:28,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2964 transitions. [2023-08-31 01:13:28,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 185.25) internal successors, (2964), 16 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:28,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:28,333 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:28,333 INFO L175 Difference]: Start difference. First operand has 544 places, 1228 transitions, 72234 flow. Second operand 16 states and 2964 transitions. [2023-08-31 01:13:28,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 1287 transitions, 75902 flow [2023-08-31 01:13:33,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 1287 transitions, 75500 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-31 01:13:33,953 INFO L231 Difference]: Finished difference. Result has 554 places, 1237 transitions, 74031 flow [2023-08-31 01:13:33,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=71832, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=74031, PETRI_PLACES=554, PETRI_TRANSITIONS=1237} [2023-08-31 01:13:33,954 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 531 predicate places. [2023-08-31 01:13:33,954 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 1237 transitions, 74031 flow [2023-08-31 01:13:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.14285714285714) internal successors, (3825), 21 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:33,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:13:33,955 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:13:33,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-31 01:13:34,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:34,157 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:13:34,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:13:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash -715912885, now seen corresponding path program 67 times [2023-08-31 01:13:34,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:13:34,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962332638] [2023-08-31 01:13:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:13:34,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:13:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:34,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:13:34,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962332638] [2023-08-31 01:13:34,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962332638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:13:34,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326276524] [2023-08-31 01:13:34,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:13:34,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:34,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:13:34,673 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:13:34,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-31 01:13:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:13:34,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:13:35,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:13:35,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2023-08-31 01:13:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:35,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:13:35,458 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:13:35,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-08-31 01:13:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:35,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326276524] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:13:35,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:13:35,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-31 01:13:35,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255626991] [2023-08-31 01:13:35,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:13:35,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:13:35,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:13:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:13:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:13:36,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:13:36,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 1237 transitions, 74031 flow. Second operand has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:36,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:13:36,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:13:36,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:13:40,975 INFO L130 PetriNetUnfolder]: 4137/7249 cut-off events. [2023-08-31 01:13:40,976 INFO L131 PetriNetUnfolder]: For 1020998/1020998 co-relation queries the response was YES. [2023-08-31 01:13:41,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158778 conditions, 7249 events. 4137/7249 cut-off events. For 1020998/1020998 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 52553 event pairs, 1538 based on Foata normal form. 20/7269 useless extension candidates. Maximal degree in co-relation 158548. Up to 6469 conditions per place. [2023-08-31 01:13:41,102 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1077 selfloop transitions, 180 changer transitions 1/1258 dead transitions. [2023-08-31 01:13:41,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1258 transitions, 76973 flow [2023-08-31 01:13:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:13:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:13:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1859 transitions. [2023-08-31 01:13:41,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3801635991820041 [2023-08-31 01:13:41,103 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1859 transitions. [2023-08-31 01:13:41,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1859 transitions. [2023-08-31 01:13:41,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:13:41,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1859 transitions. [2023-08-31 01:13:41,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 185.9) internal successors, (1859), 10 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:41,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:41,107 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:41,107 INFO L175 Difference]: Start difference. First operand has 554 places, 1237 transitions, 74031 flow. Second operand 10 states and 1859 transitions. [2023-08-31 01:13:41,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1258 transitions, 76973 flow [2023-08-31 01:13:46,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1258 transitions, 76574 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-08-31 01:13:46,765 INFO L231 Difference]: Finished difference. Result has 556 places, 1238 transitions, 74036 flow [2023-08-31 01:13:46,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73454, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=74036, PETRI_PLACES=556, PETRI_TRANSITIONS=1238} [2023-08-31 01:13:46,766 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 533 predicate places. [2023-08-31 01:13:46,767 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1238 transitions, 74036 flow [2023-08-31 01:13:46,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:46,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:13:46,767 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:13:46,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-08-31 01:13:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:46,968 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:13:46,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:13:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1901886359, now seen corresponding path program 68 times [2023-08-31 01:13:46,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:13:46,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929370996] [2023-08-31 01:13:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:13:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:13:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:47,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:13:47,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929370996] [2023-08-31 01:13:47,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929370996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:13:47,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979954773] [2023-08-31 01:13:47,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:13:47,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:47,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:13:47,382 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:13:47,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-31 01:13:47,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:13:47,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:13:47,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:13:47,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:13:47,878 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:13:47,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-08-31 01:13:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:47,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:13:48,011 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:13:48,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:13:48,049 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:13:48,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:13:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:13:48,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979954773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:13:48,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:13:48,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-31 01:13:48,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184017966] [2023-08-31 01:13:48,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:13:48,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:13:48,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:13:48,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:13:48,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:13:48,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-31 01:13:48,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1238 transitions, 74036 flow. Second operand has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:48,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:13:48,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-31 01:13:48,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:13:53,365 INFO L130 PetriNetUnfolder]: 4157/7281 cut-off events. [2023-08-31 01:13:53,365 INFO L131 PetriNetUnfolder]: For 1025286/1025286 co-relation queries the response was YES. [2023-08-31 01:13:53,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159564 conditions, 7281 events. 4157/7281 cut-off events. For 1025286/1025286 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 52866 event pairs, 1558 based on Foata normal form. 24/7305 useless extension candidates. Maximal degree in co-relation 159332. Up to 6499 conditions per place. [2023-08-31 01:13:53,502 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1091 selfloop transitions, 179 changer transitions 0/1270 dead transitions. [2023-08-31 01:13:53,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1270 transitions, 77658 flow [2023-08-31 01:13:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:13:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:13:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1866 transitions. [2023-08-31 01:13:53,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815950920245399 [2023-08-31 01:13:53,504 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1866 transitions. [2023-08-31 01:13:53,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1866 transitions. [2023-08-31 01:13:53,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:13:53,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1866 transitions. [2023-08-31 01:13:53,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.6) internal successors, (1866), 10 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:53,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:53,508 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:53,508 INFO L175 Difference]: Start difference. First operand has 556 places, 1238 transitions, 74036 flow. Second operand 10 states and 1866 transitions. [2023-08-31 01:13:53,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1270 transitions, 77658 flow [2023-08-31 01:13:59,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1270 transitions, 77194 flow, removed 56 selfloop flow, removed 9 redundant places. [2023-08-31 01:13:59,419 INFO L231 Difference]: Finished difference. Result has 557 places, 1246 transitions, 74298 flow [2023-08-31 01:13:59,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73438, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1057, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=74298, PETRI_PLACES=557, PETRI_TRANSITIONS=1246} [2023-08-31 01:13:59,421 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 534 predicate places. [2023-08-31 01:13:59,421 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1246 transitions, 74298 flow [2023-08-31 01:13:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:59,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:13:59,422 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:13:59,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-31 01:13:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-31 01:13:59,623 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:13:59,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:13:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash 595929495, now seen corresponding path program 69 times [2023-08-31 01:13:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:13:59,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107105290] [2023-08-31 01:13:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:13:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:13:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:14:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:00,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:14:00,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107105290] [2023-08-31 01:14:00,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107105290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:14:00,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516431491] [2023-08-31 01:14:00,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:14:00,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:00,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:14:00,192 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:14:00,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-31 01:14:00,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:14:00,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:14:00,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 01:14:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:14:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:00,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:14:00,854 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:14:00,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-08-31 01:14:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:00,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516431491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:14:00,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:14:00,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-08-31 01:14:00,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960194461] [2023-08-31 01:14:00,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:14:00,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 01:14:00,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:14:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 01:14:00,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-31 01:14:01,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:14:01,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1246 transitions, 74298 flow. Second operand has 22 states, 22 states have (on average 181.0909090909091) internal successors, (3984), 22 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:01,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:14:01,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:14:01,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:14:06,527 INFO L130 PetriNetUnfolder]: 4155/7285 cut-off events. [2023-08-31 01:14:06,527 INFO L131 PetriNetUnfolder]: For 1006567/1006567 co-relation queries the response was YES. [2023-08-31 01:14:06,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159593 conditions, 7285 events. 4155/7285 cut-off events. For 1006567/1006567 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 52928 event pairs, 630 based on Foata normal form. 4/7289 useless extension candidates. Maximal degree in co-relation 159360. Up to 3777 conditions per place. [2023-08-31 01:14:06,745 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 486 selfloop transitions, 789 changer transitions 11/1286 dead transitions. [2023-08-31 01:14:06,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1286 transitions, 77452 flow [2023-08-31 01:14:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:14:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:14:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2568 transitions. [2023-08-31 01:14:06,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37510955302366344 [2023-08-31 01:14:06,748 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2568 transitions. [2023-08-31 01:14:06,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2568 transitions. [2023-08-31 01:14:06,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:14:06,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2568 transitions. [2023-08-31 01:14:06,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 183.42857142857142) internal successors, (2568), 14 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:06,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:06,752 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:06,753 INFO L175 Difference]: Start difference. First operand has 557 places, 1246 transitions, 74298 flow. Second operand 14 states and 2568 transitions. [2023-08-31 01:14:06,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1286 transitions, 77452 flow [2023-08-31 01:14:12,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 1286 transitions, 76934 flow, removed 92 selfloop flow, removed 6 redundant places. [2023-08-31 01:14:12,540 INFO L231 Difference]: Finished difference. Result has 564 places, 1242 transitions, 75156 flow [2023-08-31 01:14:12,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73784, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=789, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=75156, PETRI_PLACES=564, PETRI_TRANSITIONS=1242} [2023-08-31 01:14:12,541 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 541 predicate places. [2023-08-31 01:14:12,542 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 1242 transitions, 75156 flow [2023-08-31 01:14:12,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 181.0909090909091) internal successors, (3984), 22 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:12,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:14:12,542 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:14:12,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-08-31 01:14:12,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:12,743 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:14:12,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:14:12,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1259857799, now seen corresponding path program 70 times [2023-08-31 01:14:12,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:14:12,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360118931] [2023-08-31 01:14:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:14:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:14:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:14:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:13,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:14:13,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360118931] [2023-08-31 01:14:13,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360118931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:14:13,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672228221] [2023-08-31 01:14:13,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:14:13,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:14:13,220 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:14:13,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-31 01:14:13,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:14:13,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:14:13,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-31 01:14:13,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:14:13,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:14:13,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-31 01:14:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:14:13,989 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:14:13,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:14:14,027 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:14:14,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:14:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:14,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672228221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:14:14,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:14:14,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 24 [2023-08-31 01:14:14,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688311838] [2023-08-31 01:14:14,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:14:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:14:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:14:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:14:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:14:14,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-31 01:14:14,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 1242 transitions, 75156 flow. Second operand has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:14,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:14:14,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-31 01:14:14,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:14:20,291 INFO L130 PetriNetUnfolder]: 4201/7389 cut-off events. [2023-08-31 01:14:20,292 INFO L131 PetriNetUnfolder]: For 1061588/1061588 co-relation queries the response was YES. [2023-08-31 01:14:20,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163475 conditions, 7389 events. 4201/7389 cut-off events. For 1061588/1061588 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 53977 event pairs, 1518 based on Foata normal form. 20/7409 useless extension candidates. Maximal degree in co-relation 163242. Up to 6485 conditions per place. [2023-08-31 01:14:20,430 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1083 selfloop transitions, 206 changer transitions 0/1289 dead transitions. [2023-08-31 01:14:20,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1289 transitions, 79327 flow [2023-08-31 01:14:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:14:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:14:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2555 transitions. [2023-08-31 01:14:20,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37321063394683024 [2023-08-31 01:14:20,433 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2555 transitions. [2023-08-31 01:14:20,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2555 transitions. [2023-08-31 01:14:20,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:14:20,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2555 transitions. [2023-08-31 01:14:20,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 182.5) internal successors, (2555), 14 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:20,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:20,437 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:20,437 INFO L175 Difference]: Start difference. First operand has 564 places, 1242 transitions, 75156 flow. Second operand 14 states and 2555 transitions. [2023-08-31 01:14:20,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1289 transitions, 79327 flow [2023-08-31 01:14:26,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1289 transitions, 77750 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-31 01:14:26,198 INFO L231 Difference]: Finished difference. Result has 568 places, 1254 transitions, 74803 flow [2023-08-31 01:14:26,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73607, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=74803, PETRI_PLACES=568, PETRI_TRANSITIONS=1254} [2023-08-31 01:14:26,199 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 545 predicate places. [2023-08-31 01:14:26,199 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1254 transitions, 74803 flow [2023-08-31 01:14:26,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:26,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:14:26,200 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:14:26,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-31 01:14:26,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:26,403 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:14:26,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:14:26,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1818498919, now seen corresponding path program 71 times [2023-08-31 01:14:26,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:14:26,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769220228] [2023-08-31 01:14:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:14:26,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:14:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:14:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:26,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:14:26,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769220228] [2023-08-31 01:14:26,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769220228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:14:26,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65539986] [2023-08-31 01:14:26,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:14:26,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:26,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:14:26,855 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:14:26,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-31 01:14:27,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:14:27,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:14:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-31 01:14:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:14:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:27,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:14:27,572 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-31 01:14:27,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-08-31 01:14:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:27,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65539986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:14:27,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:14:27,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2023-08-31 01:14:27,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197918825] [2023-08-31 01:14:27,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:14:27,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:14:27,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:14:27,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:14:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:14:28,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-31 01:14:28,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1254 transitions, 74803 flow. Second operand has 24 states, 24 states have (on average 182.16666666666666) internal successors, (4372), 24 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:28,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:14:28,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-31 01:14:28,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:14:33,381 INFO L130 PetriNetUnfolder]: 4189/7353 cut-off events. [2023-08-31 01:14:33,381 INFO L131 PetriNetUnfolder]: For 1019181/1019181 co-relation queries the response was YES. [2023-08-31 01:14:33,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160760 conditions, 7353 events. 4189/7353 cut-off events. For 1019181/1019181 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 53580 event pairs, 1580 based on Foata normal form. 4/7357 useless extension candidates. Maximal degree in co-relation 160524. Up to 6671 conditions per place. [2023-08-31 01:14:33,517 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1092 selfloop transitions, 162 changer transitions 6/1260 dead transitions. [2023-08-31 01:14:33,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1260 transitions, 77183 flow [2023-08-31 01:14:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:14:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:14:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1665 transitions. [2023-08-31 01:14:33,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783231083844581 [2023-08-31 01:14:33,518 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1665 transitions. [2023-08-31 01:14:33,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1665 transitions. [2023-08-31 01:14:33,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:14:33,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1665 transitions. [2023-08-31 01:14:33,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:33,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:33,521 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:33,521 INFO L175 Difference]: Start difference. First operand has 568 places, 1254 transitions, 74803 flow. Second operand 9 states and 1665 transitions. [2023-08-31 01:14:33,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1260 transitions, 77183 flow [2023-08-31 01:14:40,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1260 transitions, 76634 flow, removed 86 selfloop flow, removed 9 redundant places. [2023-08-31 01:14:40,318 INFO L231 Difference]: Finished difference. Result has 568 places, 1248 transitions, 74250 flow [2023-08-31 01:14:40,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=74072, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=74250, PETRI_PLACES=568, PETRI_TRANSITIONS=1248} [2023-08-31 01:14:40,319 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 545 predicate places. [2023-08-31 01:14:40,319 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1248 transitions, 74250 flow [2023-08-31 01:14:40,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 182.16666666666666) internal successors, (4372), 24 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:40,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:14:40,320 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:14:40,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-31 01:14:40,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-31 01:14:40,520 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:14:40,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:14:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash 177218349, now seen corresponding path program 72 times [2023-08-31 01:14:40,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:14:40,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570670751] [2023-08-31 01:14:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:14:40,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:14:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:14:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:41,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:14:41,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570670751] [2023-08-31 01:14:41,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570670751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:14:41,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469116207] [2023-08-31 01:14:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:14:41,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:14:41,010 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:14:41,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-31 01:14:41,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:14:41,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:14:41,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:14:41,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:14:41,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:14:41,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-31 01:14:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:41,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:14:41,669 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:14:41,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:14:41,710 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:14:41,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:14:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:41,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469116207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:14:41,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:14:41,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:14:41,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874613420] [2023-08-31 01:14:41,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:14:41,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:14:41,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:14:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:14:41,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:14:42,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:14:42,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1248 transitions, 74250 flow. Second operand has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:42,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:14:42,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:14:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:14:47,215 INFO L130 PetriNetUnfolder]: 4165/7277 cut-off events. [2023-08-31 01:14:47,215 INFO L131 PetriNetUnfolder]: For 1017120/1017120 co-relation queries the response was YES. [2023-08-31 01:14:47,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158979 conditions, 7277 events. 4165/7277 cut-off events. For 1017120/1017120 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 52691 event pairs, 1554 based on Foata normal form. 4/7281 useless extension candidates. Maximal degree in co-relation 158742. Up to 6571 conditions per place. [2023-08-31 01:14:47,457 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1076 selfloop transitions, 171 changer transitions 2/1249 dead transitions. [2023-08-31 01:14:47,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1249 transitions, 76264 flow [2023-08-31 01:14:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:14:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:14:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1657 transitions. [2023-08-31 01:14:47,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37650533969552374 [2023-08-31 01:14:47,460 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1657 transitions. [2023-08-31 01:14:47,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1657 transitions. [2023-08-31 01:14:47,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:14:47,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1657 transitions. [2023-08-31 01:14:47,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.11111111111111) internal successors, (1657), 9 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:47,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:47,463 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:47,464 INFO L175 Difference]: Start difference. First operand has 568 places, 1248 transitions, 74250 flow. Second operand 9 states and 1657 transitions. [2023-08-31 01:14:47,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1249 transitions, 76264 flow [2023-08-31 01:14:53,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 1249 transitions, 75924 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-08-31 01:14:53,723 INFO L231 Difference]: Finished difference. Result has 561 places, 1241 transitions, 73723 flow [2023-08-31 01:14:53,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73390, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=73723, PETRI_PLACES=561, PETRI_TRANSITIONS=1241} [2023-08-31 01:14:53,724 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 538 predicate places. [2023-08-31 01:14:53,724 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 1241 transitions, 73723 flow [2023-08-31 01:14:53,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:53,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:14:53,725 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:14:53,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-08-31 01:14:53,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:53,933 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:14:53,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:14:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1468189613, now seen corresponding path program 73 times [2023-08-31 01:14:53,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:14:53,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249981637] [2023-08-31 01:14:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:14:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:14:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:14:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:14:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249981637] [2023-08-31 01:14:54,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249981637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:14:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724046499] [2023-08-31 01:14:54,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:14:54,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:14:54,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:14:54,503 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:14:54,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-31 01:14:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:14:54,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:14:54,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:14:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:54,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:14:55,114 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:14:55,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:14:55,152 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:14:55,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:14:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:14:55,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724046499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:14:55,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:14:55,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-31 01:14:55,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605675962] [2023-08-31 01:14:55,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:14:55,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:14:55,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:14:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:14:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:14:55,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:14:55,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 1241 transitions, 73723 flow. Second operand has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:14:55,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:14:55,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:14:55,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:15:00,441 INFO L130 PetriNetUnfolder]: 4151/7235 cut-off events. [2023-08-31 01:15:00,441 INFO L131 PetriNetUnfolder]: For 1010015/1010015 co-relation queries the response was YES. [2023-08-31 01:15:00,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158143 conditions, 7235 events. 4151/7235 cut-off events. For 1010015/1010015 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 52137 event pairs, 1560 based on Foata normal form. 4/7239 useless extension candidates. Maximal degree in co-relation 157908. Up to 6561 conditions per place. [2023-08-31 01:15:00,569 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1089 selfloop transitions, 154 changer transitions 5/1248 dead transitions. [2023-08-31 01:15:00,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 1248 transitions, 76255 flow [2023-08-31 01:15:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:15:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:15:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1654 transitions. [2023-08-31 01:15:00,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37582367643717335 [2023-08-31 01:15:00,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1654 transitions. [2023-08-31 01:15:00,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1654 transitions. [2023-08-31 01:15:00,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:15:00,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1654 transitions. [2023-08-31 01:15:00,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 183.77777777777777) internal successors, (1654), 9 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:00,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:00,574 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:00,574 INFO L175 Difference]: Start difference. First operand has 561 places, 1241 transitions, 73723 flow. Second operand 9 states and 1654 transitions. [2023-08-31 01:15:00,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 1248 transitions, 76255 flow [2023-08-31 01:15:06,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 1248 transitions, 75913 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-31 01:15:06,235 INFO L231 Difference]: Finished difference. Result has 561 places, 1238 transitions, 73560 flow [2023-08-31 01:15:06,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73381, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1087, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=73560, PETRI_PLACES=561, PETRI_TRANSITIONS=1238} [2023-08-31 01:15:06,237 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 538 predicate places. [2023-08-31 01:15:06,237 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 1238 transitions, 73560 flow [2023-08-31 01:15:06,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:06,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:15:06,238 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:15:06,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-08-31 01:15:06,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:15:06,446 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:15:06,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:15:06,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1845738929, now seen corresponding path program 74 times [2023-08-31 01:15:06,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:15:06,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378153112] [2023-08-31 01:15:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:15:06,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:15:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:15:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:06,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:15:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378153112] [2023-08-31 01:15:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378153112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:15:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169583633] [2023-08-31 01:15:06,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:15:06,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:15:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:15:06,980 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:15:06,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-31 01:15:07,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:15:07,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:15:07,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:15:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:15:07,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:15:07,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-31 01:15:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:07,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:15:07,681 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-31 01:15:07,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-31 01:15:07,721 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-31 01:15:07,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-31 01:15:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:07,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169583633] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:15:07,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:15:07,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 21 [2023-08-31 01:15:07,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676313543] [2023-08-31 01:15:07,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:15:07,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:15:07,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:15:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:15:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:15:08,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:15:08,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 1238 transitions, 73560 flow. Second operand has 21 states, 21 states have (on average 181.33333333333334) internal successors, (3808), 21 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:08,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:15:08,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:15:08,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:15:12,975 INFO L130 PetriNetUnfolder]: 4135/7195 cut-off events. [2023-08-31 01:15:12,975 INFO L131 PetriNetUnfolder]: For 1008856/1008856 co-relation queries the response was YES. [2023-08-31 01:15:13,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157796 conditions, 7195 events. 4135/7195 cut-off events. For 1008856/1008856 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 51723 event pairs, 1536 based on Foata normal form. 12/7207 useless extension candidates. Maximal degree in co-relation 157560. Up to 6495 conditions per place. [2023-08-31 01:15:13,112 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1082 selfloop transitions, 166 changer transitions 0/1248 dead transitions. [2023-08-31 01:15:13,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 1248 transitions, 76102 flow [2023-08-31 01:15:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:15:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:15:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1842 transitions. [2023-08-31 01:15:13,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37668711656441717 [2023-08-31 01:15:13,113 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1842 transitions. [2023-08-31 01:15:13,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1842 transitions. [2023-08-31 01:15:13,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:15:13,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1842 transitions. [2023-08-31 01:15:13,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.2) internal successors, (1842), 10 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:13,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:13,117 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:13,117 INFO L175 Difference]: Start difference. First operand has 561 places, 1238 transitions, 73560 flow. Second operand 10 states and 1842 transitions. [2023-08-31 01:15:13,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 1248 transitions, 76102 flow [2023-08-31 01:15:19,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1248 transitions, 75730 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-31 01:15:19,602 INFO L231 Difference]: Finished difference. Result has 556 places, 1237 transitions, 73509 flow [2023-08-31 01:15:19,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73177, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=73509, PETRI_PLACES=556, PETRI_TRANSITIONS=1237} [2023-08-31 01:15:19,603 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 533 predicate places. [2023-08-31 01:15:19,603 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1237 transitions, 73509 flow [2023-08-31 01:15:19,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 181.33333333333334) internal successors, (3808), 21 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:19,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:15:19,604 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:15:19,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-08-31 01:15:19,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:15:19,805 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:15:19,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:15:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1127950637, now seen corresponding path program 75 times [2023-08-31 01:15:19,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:15:19,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363311373] [2023-08-31 01:15:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:15:19,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:15:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:15:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:20,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:15:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363311373] [2023-08-31 01:15:20,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363311373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:15:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052781188] [2023-08-31 01:15:20,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:15:20,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:15:20,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:15:20,413 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:15:20,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-31 01:15:20,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:15:20,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:15:20,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-31 01:15:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:15:21,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:15:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:15:21,033 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:15:21,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2023-08-31 01:15:21,139 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:15:21,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 23 [2023-08-31 01:15:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:21,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:15:21,356 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-31 01:15:21,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 107 [2023-08-31 01:15:21,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:15:21,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-08-31 01:15:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:21,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052781188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:15:21,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:15:21,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 01:15:21,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813973281] [2023-08-31 01:15:21,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:15:21,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:15:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:15:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:15:21,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=753, Unknown=1, NotChecked=0, Total=870 [2023-08-31 01:15:22,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-08-31 01:15:22,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1237 transitions, 73509 flow. Second operand has 30 states, 30 states have (on average 156.83333333333334) internal successors, (4705), 30 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:22,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:15:22,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-08-31 01:15:22,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:15:27,996 INFO L130 PetriNetUnfolder]: 4217/7337 cut-off events. [2023-08-31 01:15:27,996 INFO L131 PetriNetUnfolder]: For 939526/939526 co-relation queries the response was YES. [2023-08-31 01:15:28,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160292 conditions, 7337 events. 4217/7337 cut-off events. For 939526/939526 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 52748 event pairs, 139 based on Foata normal form. 28/7365 useless extension candidates. Maximal degree in co-relation 160058. Up to 2922 conditions per place. [2023-08-31 01:15:28,133 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 582 selfloop transitions, 741 changer transitions 1/1324 dead transitions. [2023-08-31 01:15:28,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1324 transitions, 79225 flow [2023-08-31 01:15:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:15:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:15:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2246 transitions. [2023-08-31 01:15:28,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3280747881974876 [2023-08-31 01:15:28,135 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2246 transitions. [2023-08-31 01:15:28,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2246 transitions. [2023-08-31 01:15:28,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:15:28,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2246 transitions. [2023-08-31 01:15:28,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 160.42857142857142) internal successors, (2246), 14 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:28,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:28,140 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:28,140 INFO L175 Difference]: Start difference. First operand has 556 places, 1237 transitions, 73509 flow. Second operand 14 states and 2246 transitions. [2023-08-31 01:15:28,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1324 transitions, 79225 flow [2023-08-31 01:15:34,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 1324 transitions, 78841 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-31 01:15:34,482 INFO L231 Difference]: Finished difference. Result has 562 places, 1255 transitions, 75451 flow [2023-08-31 01:15:34,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=73125, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=75451, PETRI_PLACES=562, PETRI_TRANSITIONS=1255} [2023-08-31 01:15:34,483 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 539 predicate places. [2023-08-31 01:15:34,483 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 1255 transitions, 75451 flow [2023-08-31 01:15:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 156.83333333333334) internal successors, (4705), 30 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:34,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:15:34,484 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:15:34,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-08-31 01:15:34,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-08-31 01:15:34,684 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:15:34,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:15:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash -931089555, now seen corresponding path program 76 times [2023-08-31 01:15:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:15:34,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931153420] [2023-08-31 01:15:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:15:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:15:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:15:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:15:35,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931153420] [2023-08-31 01:15:35,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931153420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:15:35,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208278650] [2023-08-31 01:15:35,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:15:35,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:15:35,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:15:35,289 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:15:35,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-08-31 01:15:35,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:15:35,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:15:35,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-31 01:15:35,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:15:35,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:15:35,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:15:35,951 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:15:35,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-08-31 01:15:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:35,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:15:36,129 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5714 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_5714))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))))))) is different from false [2023-08-31 01:15:36,175 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-31 01:15:36,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 127 [2023-08-31 01:15:36,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:15:36,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-08-31 01:15:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:36,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208278650] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:15:36,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:15:36,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-31 01:15:36,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51624743] [2023-08-31 01:15:36,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:15:36,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:15:36,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:15:36,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:15:36,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=601, Unknown=1, NotChecked=50, Total=756 [2023-08-31 01:15:36,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-31 01:15:36,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 1255 transitions, 75451 flow. Second operand has 28 states, 28 states have (on average 160.96428571428572) internal successors, (4507), 28 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:36,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:15:36,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-31 01:15:36,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:15:41,876 INFO L130 PetriNetUnfolder]: 4345/7561 cut-off events. [2023-08-31 01:15:41,876 INFO L131 PetriNetUnfolder]: For 1052535/1052535 co-relation queries the response was YES. [2023-08-31 01:15:41,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166879 conditions, 7561 events. 4345/7561 cut-off events. For 1052535/1052535 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 54630 event pairs, 682 based on Foata normal form. 36/7597 useless extension candidates. Maximal degree in co-relation 166640. Up to 3275 conditions per place. [2023-08-31 01:15:42,111 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 792 selfloop transitions, 547 changer transitions 1/1340 dead transitions. [2023-08-31 01:15:42,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1340 transitions, 81527 flow [2023-08-31 01:15:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:15:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:15:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2471 transitions. [2023-08-31 01:15:42,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3368779822767553 [2023-08-31 01:15:42,113 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2471 transitions. [2023-08-31 01:15:42,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2471 transitions. [2023-08-31 01:15:42,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:15:42,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2471 transitions. [2023-08-31 01:15:42,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.73333333333332) internal successors, (2471), 15 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:42,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:42,118 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:42,118 INFO L175 Difference]: Start difference. First operand has 562 places, 1255 transitions, 75451 flow. Second operand 15 states and 2471 transitions. [2023-08-31 01:15:42,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1340 transitions, 81527 flow [2023-08-31 01:15:48,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1340 transitions, 80412 flow, removed 124 selfloop flow, removed 11 redundant places. [2023-08-31 01:15:48,944 INFO L231 Difference]: Finished difference. Result has 569 places, 1277 transitions, 76910 flow [2023-08-31 01:15:48,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=74366, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=76910, PETRI_PLACES=569, PETRI_TRANSITIONS=1277} [2023-08-31 01:15:48,946 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 546 predicate places. [2023-08-31 01:15:48,946 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 1277 transitions, 76910 flow [2023-08-31 01:15:48,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.96428571428572) internal successors, (4507), 28 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:48,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:15:48,947 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:15:48,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-08-31 01:15:49,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:15:49,157 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:15:49,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:15:49,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1919595579, now seen corresponding path program 77 times [2023-08-31 01:15:49,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:15:49,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165377953] [2023-08-31 01:15:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:15:49,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:15:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:15:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:50,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:15:50,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165377953] [2023-08-31 01:15:50,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165377953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:15:50,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840190910] [2023-08-31 01:15:50,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:15:50,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:15:50,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:15:50,027 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:15:50,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-08-31 01:15:50,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:15:50,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:15:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-31 01:15:50,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:15:50,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:15:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:15:50,684 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:15:50,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2023-08-31 01:15:50,857 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:15:50,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-08-31 01:15:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:50,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:15:51,128 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-31 01:15:51,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 107 [2023-08-31 01:15:51,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:15:51,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-08-31 01:15:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:15:51,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840190910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:15:51,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:15:51,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 34 [2023-08-31 01:15:51,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602988661] [2023-08-31 01:15:51,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:15:51,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 01:15:51,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:15:51,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 01:15:51,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1053, Unknown=2, NotChecked=0, Total=1190 [2023-08-31 01:15:51,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 489 [2023-08-31 01:15:51,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1277 transitions, 76910 flow. Second operand has 35 states, 35 states have (on average 153.77142857142857) internal successors, (5382), 35 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:15:51,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:15:51,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 489 [2023-08-31 01:15:51,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:00,152 INFO L130 PetriNetUnfolder]: 4721/8253 cut-off events. [2023-08-31 01:16:00,152 INFO L131 PetriNetUnfolder]: For 1078251/1078251 co-relation queries the response was YES. [2023-08-31 01:16:00,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178708 conditions, 8253 events. 4721/8253 cut-off events. For 1078251/1078251 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 60658 event pairs, 124 based on Foata normal form. 44/8297 useless extension candidates. Maximal degree in co-relation 178466. Up to 2564 conditions per place. [2023-08-31 01:16:00,312 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 519 selfloop transitions, 971 changer transitions 1/1491 dead transitions. [2023-08-31 01:16:00,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 1491 transitions, 87426 flow [2023-08-31 01:16:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 01:16:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 01:16:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4871 transitions. [2023-08-31 01:16:00,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3213272643314203 [2023-08-31 01:16:00,316 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4871 transitions. [2023-08-31 01:16:00,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4871 transitions. [2023-08-31 01:16:00,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:00,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4871 transitions. [2023-08-31 01:16:00,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 157.1290322580645) internal successors, (4871), 31 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:00,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 489.0) internal successors, (15648), 32 states have internal predecessors, (15648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:00,326 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 489.0) internal successors, (15648), 32 states have internal predecessors, (15648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:00,327 INFO L175 Difference]: Start difference. First operand has 569 places, 1277 transitions, 76910 flow. Second operand 31 states and 4871 transitions. [2023-08-31 01:16:00,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 1491 transitions, 87426 flow [2023-08-31 01:16:08,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 1491 transitions, 86628 flow, removed 272 selfloop flow, removed 10 redundant places. [2023-08-31 01:16:08,327 INFO L231 Difference]: Finished difference. Result has 598 places, 1390 transitions, 84856 flow [2023-08-31 01:16:08,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=76304, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=874, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=84856, PETRI_PLACES=598, PETRI_TRANSITIONS=1390} [2023-08-31 01:16:08,328 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 575 predicate places. [2023-08-31 01:16:08,328 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 1390 transitions, 84856 flow [2023-08-31 01:16:08,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 153.77142857142857) internal successors, (5382), 35 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:08,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:08,329 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:08,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-08-31 01:16:08,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:08,530 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:08,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash -995829491, now seen corresponding path program 78 times [2023-08-31 01:16:08,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:08,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038531971] [2023-08-31 01:16:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:08,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:16:09,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038531971] [2023-08-31 01:16:09,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038531971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:09,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810420633] [2023-08-31 01:16:09,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:16:09,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:09,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:09,027 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:16:09,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-08-31 01:16:09,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:16:09,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:16:09,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:16:09,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:16:09,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:09,715 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-31 01:16:09,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-08-31 01:16:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:16:09,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810420633] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:16:09,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:16:09,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-31 01:16:09,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879743446] [2023-08-31 01:16:09,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:16:09,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 01:16:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 01:16:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-08-31 01:16:10,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-31 01:16:10,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 1390 transitions, 84856 flow. Second operand has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:10,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:10,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-31 01:16:10,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:16,513 INFO L130 PetriNetUnfolder]: 4723/8269 cut-off events. [2023-08-31 01:16:16,514 INFO L131 PetriNetUnfolder]: For 1216820/1216820 co-relation queries the response was YES. [2023-08-31 01:16:16,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182358 conditions, 8269 events. 4723/8269 cut-off events. For 1216820/1216820 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 61135 event pairs, 1233 based on Foata normal form. 4/8273 useless extension candidates. Maximal degree in co-relation 182108. Up to 5777 conditions per place. [2023-08-31 01:16:16,679 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 1017 selfloop transitions, 416 changer transitions 11/1444 dead transitions. [2023-08-31 01:16:16,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 1444 transitions, 90616 flow [2023-08-31 01:16:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:16:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:16:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1663 transitions. [2023-08-31 01:16:16,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778686662122245 [2023-08-31 01:16:16,681 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1663 transitions. [2023-08-31 01:16:16,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1663 transitions. [2023-08-31 01:16:16,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:16,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1663 transitions. [2023-08-31 01:16:16,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:16,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:16,684 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:16,685 INFO L175 Difference]: Start difference. First operand has 598 places, 1390 transitions, 84856 flow. Second operand 9 states and 1663 transitions. [2023-08-31 01:16:16,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 1444 transitions, 90616 flow [2023-08-31 01:16:26,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1444 transitions, 89224 flow, removed 284 selfloop flow, removed 12 redundant places. [2023-08-31 01:16:26,882 INFO L231 Difference]: Finished difference. Result has 597 places, 1388 transitions, 84244 flow [2023-08-31 01:16:26,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=83486, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=974, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=84244, PETRI_PLACES=597, PETRI_TRANSITIONS=1388} [2023-08-31 01:16:26,883 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 574 predicate places. [2023-08-31 01:16:26,883 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 1388 transitions, 84244 flow [2023-08-31 01:16:26,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:26,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:26,884 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:26,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-08-31 01:16:27,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-08-31 01:16:27,085 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:27,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:27,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1202072115, now seen corresponding path program 79 times [2023-08-31 01:16:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:27,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75832795] [2023-08-31 01:16:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:27,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:16:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75832795] [2023-08-31 01:16:27,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75832795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785633867] [2023-08-31 01:16:27,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:16:27,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:27,697 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:16:27,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-08-31 01:16:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-31 01:16:28,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:16:28,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:16:28,458 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:16:28,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-08-31 01:16:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:16:28,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:28,656 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5926 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_5926))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2023-08-31 01:16:28,703 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-31 01:16:28,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 127 [2023-08-31 01:16:28,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:16:28,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-08-31 01:16:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:16:29,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785633867] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:16:29,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:16:29,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2023-08-31 01:16:29,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102363840] [2023-08-31 01:16:29,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:16:29,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:16:29,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:16:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=558, Unknown=1, NotChecked=48, Total=702 [2023-08-31 01:16:29,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-31 01:16:29,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1388 transitions, 84244 flow. Second operand has 27 states, 27 states have (on average 160.96296296296296) internal successors, (4346), 27 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:29,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:29,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-31 01:16:29,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:35,066 INFO L130 PetriNetUnfolder]: 4727/8267 cut-off events. [2023-08-31 01:16:35,066 INFO L131 PetriNetUnfolder]: For 1196458/1196458 co-relation queries the response was YES. [2023-08-31 01:16:35,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181917 conditions, 8267 events. 4727/8267 cut-off events. For 1196458/1196458 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 61021 event pairs, 1709 based on Foata normal form. 24/8291 useless extension candidates. Maximal degree in co-relation 181668. Up to 7417 conditions per place. [2023-08-31 01:16:35,224 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 1190 selfloop transitions, 231 changer transitions 1/1422 dead transitions. [2023-08-31 01:16:35,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1422 transitions, 88170 flow [2023-08-31 01:16:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:16:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:16:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1972 transitions. [2023-08-31 01:16:35,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33605998636673484 [2023-08-31 01:16:35,226 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1972 transitions. [2023-08-31 01:16:35,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1972 transitions. [2023-08-31 01:16:35,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:35,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1972 transitions. [2023-08-31 01:16:35,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 164.33333333333334) internal successors, (1972), 12 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:35,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:35,230 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:35,230 INFO L175 Difference]: Start difference. First operand has 597 places, 1388 transitions, 84244 flow. Second operand 12 states and 1972 transitions. [2023-08-31 01:16:35,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1422 transitions, 88170 flow [2023-08-31 01:16:44,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1422 transitions, 87320 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-31 01:16:44,784 INFO L231 Difference]: Finished difference. Result has 599 places, 1392 transitions, 84117 flow [2023-08-31 01:16:44,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=83275, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=84117, PETRI_PLACES=599, PETRI_TRANSITIONS=1392} [2023-08-31 01:16:44,786 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 576 predicate places. [2023-08-31 01:16:44,786 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 1392 transitions, 84117 flow [2023-08-31 01:16:44,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 160.96296296296296) internal successors, (4346), 27 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:44,787 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:44,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-08-31 01:16:44,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:44,995 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:44,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 194927569, now seen corresponding path program 80 times [2023-08-31 01:16:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:44,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059146571] [2023-08-31 01:16:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:16:45,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:45,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059146571] [2023-08-31 01:16:45,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059146571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:45,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248420535] [2023-08-31 01:16:45,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:16:45,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:45,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:45,616 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:16:45,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-08-31 01:16:45,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:16:45,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:16:45,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-31 01:16:45,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:46,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:16:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:16:46,247 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 01:16:46,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2023-08-31 01:16:46,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:16:46,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:16:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:16:46,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:46,818 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-31 01:16:46,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 107 [2023-08-31 01:16:46,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:16:46,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-08-31 01:16:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:16:47,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248420535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:16:47,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:16:47,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 33 [2023-08-31 01:16:47,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842106858] [2023-08-31 01:16:47,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:16:47,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 01:16:47,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:47,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 01:16:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=984, Unknown=2, NotChecked=0, Total=1122 [2023-08-31 01:16:48,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 489 [2023-08-31 01:16:48,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1392 transitions, 84117 flow. Second operand has 34 states, 34 states have (on average 153.76470588235293) internal successors, (5228), 34 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:48,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:48,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 489 [2023-08-31 01:16:48,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:56,901 INFO L130 PetriNetUnfolder]: 5023/8747 cut-off events. [2023-08-31 01:16:56,902 INFO L131 PetriNetUnfolder]: For 1337866/1337866 co-relation queries the response was YES. [2023-08-31 01:16:57,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189223 conditions, 8747 events. 5023/8747 cut-off events. For 1337866/1337866 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 64859 event pairs, 112 based on Foata normal form. 12/8759 useless extension candidates. Maximal degree in co-relation 188974. Up to 2896 conditions per place. [2023-08-31 01:16:57,163 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 305 selfloop transitions, 1237 changer transitions 5/1547 dead transitions. [2023-08-31 01:16:57,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1547 transitions, 92661 flow [2023-08-31 01:16:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 01:16:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 01:16:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4388 transitions. [2023-08-31 01:16:57,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3204791118901548 [2023-08-31 01:16:57,167 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4388 transitions. [2023-08-31 01:16:57,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4388 transitions. [2023-08-31 01:16:57,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:57,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4388 transitions. [2023-08-31 01:16:57,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 156.71428571428572) internal successors, (4388), 28 states have internal predecessors, (4388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:57,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:57,176 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:57,176 INFO L175 Difference]: Start difference. First operand has 599 places, 1392 transitions, 84117 flow. Second operand 28 states and 4388 transitions. [2023-08-31 01:16:57,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1547 transitions, 92661 flow [2023-08-31 01:17:06,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 1547 transitions, 91564 flow, removed 94 selfloop flow, removed 14 redundant places. [2023-08-31 01:17:07,005 INFO L231 Difference]: Finished difference. Result has 614 places, 1468 transitions, 90056 flow [2023-08-31 01:17:07,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=81808, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=90056, PETRI_PLACES=614, PETRI_TRANSITIONS=1468} [2023-08-31 01:17:07,006 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 591 predicate places. [2023-08-31 01:17:07,007 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1468 transitions, 90056 flow [2023-08-31 01:17:07,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 153.76470588235293) internal successors, (5228), 34 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:07,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:07,008 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:07,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-08-31 01:17:07,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:07,210 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:07,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:07,210 INFO L85 PathProgramCache]: Analyzing trace with hash 309149859, now seen corresponding path program 81 times [2023-08-31 01:17:07,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:07,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590167679] [2023-08-31 01:17:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:07,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:17:07,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:07,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590167679] [2023-08-31 01:17:07,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590167679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:07,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76069003] [2023-08-31 01:17:07,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:17:07,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:07,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:07,751 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:07,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-08-31 01:17:08,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 01:17:08,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-31 01:17:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:17:08,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:17:08,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:08,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-08-31 01:17:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:17:08,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:08,830 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6068 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6068))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2023-08-31 01:17:08,875 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-31 01:17:08,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 127 [2023-08-31 01:17:08,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:08,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-08-31 01:17:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:17:09,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76069003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:09,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:09,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 01:17:09,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173599662] [2023-08-31 01:17:09,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:09,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:17:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:17:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=709, Unknown=1, NotChecked=54, Total=870 [2023-08-31 01:17:09,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-31 01:17:09,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1468 transitions, 90056 flow. Second operand has 30 states, 30 states have (on average 160.76666666666668) internal successors, (4823), 30 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:09,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:09,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-31 01:17:09,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:17,988 INFO L130 PetriNetUnfolder]: 4997/8701 cut-off events. [2023-08-31 01:17:17,988 INFO L131 PetriNetUnfolder]: For 1209925/1209925 co-relation queries the response was YES. [2023-08-31 01:17:18,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191833 conditions, 8701 events. 4997/8701 cut-off events. For 1209925/1209925 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 64268 event pairs, 833 based on Foata normal form. 16/8717 useless extension candidates. Maximal degree in co-relation 191582. Up to 4643 conditions per place. [2023-08-31 01:17:18,161 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 601 selfloop transitions, 924 changer transitions 3/1528 dead transitions. [2023-08-31 01:17:18,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 1528 transitions, 94496 flow [2023-08-31 01:17:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 01:17:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 01:17:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3114 transitions. [2023-08-31 01:17:18,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3351630610268001 [2023-08-31 01:17:18,164 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3114 transitions. [2023-08-31 01:17:18,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3114 transitions. [2023-08-31 01:17:18,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:18,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3114 transitions. [2023-08-31 01:17:18,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 163.89473684210526) internal successors, (3114), 19 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:18,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:18,171 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:18,171 INFO L175 Difference]: Start difference. First operand has 614 places, 1468 transitions, 90056 flow. Second operand 19 states and 3114 transitions. [2023-08-31 01:17:18,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 1528 transitions, 94496 flow [2023-08-31 01:17:29,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 1528 transitions, 93579 flow, removed 48 selfloop flow, removed 18 redundant places. [2023-08-31 01:17:29,141 INFO L231 Difference]: Finished difference. Result has 613 places, 1480 transitions, 91919 flow [2023-08-31 01:17:29,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=88967, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=909, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=91919, PETRI_PLACES=613, PETRI_TRANSITIONS=1480} [2023-08-31 01:17:29,143 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 590 predicate places. [2023-08-31 01:17:29,143 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1480 transitions, 91919 flow [2023-08-31 01:17:29,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.76666666666668) internal successors, (4823), 30 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:29,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:29,143 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:29,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-08-31 01:17:29,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-08-31 01:17:29,344 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:29,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1254230519, now seen corresponding path program 82 times [2023-08-31 01:17:29,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:29,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767170168] [2023-08-31 01:17:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:29,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:17:29,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:29,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767170168] [2023-08-31 01:17:29,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767170168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:29,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832561480] [2023-08-31 01:17:29,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:17:29,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:29,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:29,881 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:29,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-08-31 01:17:30,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:17:30,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:30,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-31 01:17:30,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:30,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:17:30,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 01:17:30,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:30,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-31 01:17:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:17:30,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:30,760 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6139 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6139))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))))))) is different from false [2023-08-31 01:17:30,814 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-31 01:17:30,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 127 [2023-08-31 01:17:30,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:30,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-08-31 01:17:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:17:31,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832561480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:31,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:31,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 28 [2023-08-31 01:17:31,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676197825] [2023-08-31 01:17:31,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 01:17:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 01:17:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=657, Unknown=1, NotChecked=52, Total=812 [2023-08-31 01:17:31,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-31 01:17:31,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1480 transitions, 91919 flow. Second operand has 29 states, 29 states have (on average 160.89655172413794) internal successors, (4666), 29 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:31,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:31,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-31 01:17:31,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15