./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp3x3.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/bench-exp3x3.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 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 --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 00:59:49,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:59:49,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:59:49,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:59:49,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:59:49,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:59:49,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:59:49,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:59:49,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:59:49,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:59:49,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:59:49,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:59:49,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:59:49,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:59:49,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:59:49,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:59:49,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:59:49,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:59:49,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:59:49,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:59:49,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:59:49,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:59:49,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:59:49,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:59:49,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:59:49,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:59:49,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:59:49,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:59:49,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:59:49,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:59:49,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:59:49,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:59:49,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:59:49,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:59:49,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:59:49,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:59:49,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:59:49,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:59:49,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:59:49,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:59:49,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:59:49,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:59:49,727 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:59:49,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:59:49,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:59:49,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:59:49,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:59:49,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:59:49,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:59:49,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:59:49,731 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:59:49,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:59:49,732 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:59:49,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:59:49,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:59:49,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:59:49,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:59:49,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:59:49,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:59:49,733 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:59:49,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:59:49,733 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:59:49,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:59:49,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:59:49,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:59:49,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:59:49,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:59:49,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:59:49,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:59:49,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:59:49,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:59:49,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:59:49,736 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:59:49,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:59:49,736 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:59:49,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:59:49,736 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:59:49,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:59:50,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:59:50,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:59:50,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:59:50,042 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:59:50,044 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:59:50,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp3x3.wvr.c [2023-08-31 00:59:51,174 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:59:51,374 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:59:51,375 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp3x3.wvr.c [2023-08-31 00:59:51,380 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383e71910/a1a5dfef98b64ba196989303e5fb37d5/FLAG304767eb8 [2023-08-31 00:59:51,392 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383e71910/a1a5dfef98b64ba196989303e5fb37d5 [2023-08-31 00:59:51,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:59:51,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:59:51,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:59:51,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:59:51,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:59:51,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2297ed5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51, skipping insertion in model container [2023-08-31 00:59:51,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:59:51,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:59:51,602 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/bench-exp3x3.wvr.c[2625,2638] [2023-08-31 00:59:51,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:59:51,620 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:59:51,656 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/bench-exp3x3.wvr.c[2625,2638] [2023-08-31 00:59:51,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:59:51,673 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:59:51,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51 WrapperNode [2023-08-31 00:59:51,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:59:51,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:59:51,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:59:51,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:59:51,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,726 INFO L138 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2023-08-31 00:59:51,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:59:51,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:59:51,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:59:51,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:59:51,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,764 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:59:51,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:59:51,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:59:51,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:59:51,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (1/1) ... [2023-08-31 00:59:51,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:59:51,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:59:51,806 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 00:59:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:59:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 00:59:51,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 00:59:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 00:59:51,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 00:59:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 00:59:51,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 00:59:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 00:59:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 00:59:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:59:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-31 00:59:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-31 00:59:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-31 00:59:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-31 00:59:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:59:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:59:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:59:51,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:59:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:59:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:59:51,896 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 00:59:51,833 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 00:59:52,011 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:59:52,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:59:52,310 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:59:52,317 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:59:52,318 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-31 00:59:52,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:59:52 BoogieIcfgContainer [2023-08-31 00:59:52,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:59:52,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:59:52,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:59:52,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:59:52,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:59:51" (1/3) ... [2023-08-31 00:59:52,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741f4737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:59:52, skipping insertion in model container [2023-08-31 00:59:52,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:59:51" (2/3) ... [2023-08-31 00:59:52,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741f4737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:59:52, skipping insertion in model container [2023-08-31 00:59:52,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:59:52" (3/3) ... [2023-08-31 00:59:52,327 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2023-08-31 00:59:52,335 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:59:52,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:59:52,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:59:52,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:59:52,491 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-31 00:59:52,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2023-08-31 00:59:52,639 INFO L130 PetriNetUnfolder]: 14/163 cut-off events. [2023-08-31 00:59:52,640 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:59:52,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-08-31 00:59:52,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2023-08-31 00:59:52,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 147 transitions, 330 flow [2023-08-31 00:59:52,656 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:59:52,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 147 transitions, 330 flow [2023-08-31 00:59:52,671 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 147 transitions, 330 flow [2023-08-31 00:59:52,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 147 transitions, 330 flow [2023-08-31 00:59:52,726 INFO L130 PetriNetUnfolder]: 14/147 cut-off events. [2023-08-31 00:59:52,727 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:59:52,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 147 events. 14/147 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-08-31 00:59:52,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 2916 [2023-08-31 00:59:58,718 INFO L134 LiptonReduction]: Checked pairs total: 3523 [2023-08-31 00:59:58,719 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-31 00:59:58,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:59:58,735 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;@740019a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:59:58,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-31 00:59:58,747 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2023-08-31 00:59:58,748 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:59:58,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:59:58,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:59:58,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:59:58,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:59:58,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1406052379, now seen corresponding path program 1 times [2023-08-31 00:59:58,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:59:58,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676378543] [2023-08-31 00:59:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:59:58,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:59:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:59:59,635 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 00:59:59,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:59:59,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676378543] [2023-08-31 00:59:59,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676378543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:59:59,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:59:59,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:59:59,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871252042] [2023-08-31 00:59:59,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:59:59,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:59:59,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:59:59,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:59:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:59:59,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 295 [2023-08-31 00:59:59,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:59:59,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:59:59,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 295 [2023-08-31 00:59:59,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:00,181 INFO L130 PetriNetUnfolder]: 3473/4229 cut-off events. [2023-08-31 01:00:00,181 INFO L131 PetriNetUnfolder]: For 247/247 co-relation queries the response was YES. [2023-08-31 01:00:00,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8842 conditions, 4229 events. 3473/4229 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 11612 event pairs, 837 based on Foata normal form. 1/2430 useless extension candidates. Maximal degree in co-relation 6136. Up to 3015 conditions per place. [2023-08-31 01:00:00,215 INFO L137 encePairwiseOnDemand]: 287/295 looper letters, 63 selfloop transitions, 7 changer transitions 1/71 dead transitions. [2023-08-31 01:00:00,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 353 flow [2023-08-31 01:00:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:00:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:00:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-31 01:00:00,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220338983050847 [2023-08-31 01:00:00,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-31 01:00:00,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-31 01:00:00,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:00,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-31 01:00:00,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:00,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:00,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:00,250 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 110 flow. Second operand 3 states and 462 transitions. [2023-08-31 01:00:00,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 353 flow [2023-08-31 01:00:00,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 71 transitions, 307 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-31 01:00:00,263 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 133 flow [2023-08-31 01:00:00,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2023-08-31 01:00:00,270 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -9 predicate places. [2023-08-31 01:00:00,271 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 133 flow [2023-08-31 01:00:00,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:00,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:00,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:00,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:00:00,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:00,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:00,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1369672065, now seen corresponding path program 1 times [2023-08-31 01:00:00,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:00,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525134623] [2023-08-31 01:00:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:00,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:00,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:00,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525134623] [2023-08-31 01:00:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525134623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:00:00,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:00:00,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:00:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994401392] [2023-08-31 01:00:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:00:00,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:00:00,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:00:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:00:00,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:00,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:00,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:00,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:00,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:01,294 INFO L130 PetriNetUnfolder]: 5067/6189 cut-off events. [2023-08-31 01:00:01,295 INFO L131 PetriNetUnfolder]: For 2240/2240 co-relation queries the response was YES. [2023-08-31 01:00:01,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15972 conditions, 6189 events. 5067/6189 cut-off events. For 2240/2240 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19154 event pairs, 259 based on Foata normal form. 122/6311 useless extension candidates. Maximal degree in co-relation 4985. Up to 3157 conditions per place. [2023-08-31 01:00:01,323 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 116 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2023-08-31 01:00:01,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 126 transitions, 621 flow [2023-08-31 01:00:01,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 796 transitions. [2023-08-31 01:00:01,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396610169491526 [2023-08-31 01:00:01,327 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 796 transitions. [2023-08-31 01:00:01,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 796 transitions. [2023-08-31 01:00:01,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:01,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 796 transitions. [2023-08-31 01:00:01,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,332 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,333 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 133 flow. Second operand 5 states and 796 transitions. [2023-08-31 01:00:01,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 126 transitions, 621 flow [2023-08-31 01:00:01,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 126 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:00:01,336 INFO L231 Difference]: Finished difference. Result has 46 places, 50 transitions, 191 flow [2023-08-31 01:00:01,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=46, PETRI_TRANSITIONS=50} [2023-08-31 01:00:01,337 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2023-08-31 01:00:01,337 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 50 transitions, 191 flow [2023-08-31 01:00:01,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:01,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:01,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:00:01,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:01,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:01,339 INFO L85 PathProgramCache]: Analyzing trace with hash -388248143, now seen corresponding path program 1 times [2023-08-31 01:00:01,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:01,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282738813] [2023-08-31 01:00:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:01,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:01,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:01,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282738813] [2023-08-31 01:00:01,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282738813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:00:01,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:00:01,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:00:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695451947] [2023-08-31 01:00:01,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:00:01,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:00:01,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:00:01,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:00:01,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:01,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:01,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:01,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:02,285 INFO L130 PetriNetUnfolder]: 4881/6003 cut-off events. [2023-08-31 01:00:02,285 INFO L131 PetriNetUnfolder]: For 4584/4584 co-relation queries the response was YES. [2023-08-31 01:00:02,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16717 conditions, 6003 events. 4881/6003 cut-off events. For 4584/4584 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19003 event pairs, 259 based on Foata normal form. 186/6189 useless extension candidates. Maximal degree in co-relation 7058. Up to 3157 conditions per place. [2023-08-31 01:00:02,369 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 116 selfloop transitions, 8 changer transitions 0/124 dead transitions. [2023-08-31 01:00:02,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 124 transitions, 642 flow [2023-08-31 01:00:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 795 transitions. [2023-08-31 01:00:02,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5389830508474577 [2023-08-31 01:00:02,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 795 transitions. [2023-08-31 01:00:02,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 795 transitions. [2023-08-31 01:00:02,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:02,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 795 transitions. [2023-08-31 01:00:02,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:02,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:02,378 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:02,378 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 191 flow. Second operand 5 states and 795 transitions. [2023-08-31 01:00:02,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 124 transitions, 642 flow [2023-08-31 01:00:02,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 124 transitions, 642 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 01:00:02,385 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 205 flow [2023-08-31 01:00:02,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-08-31 01:00:02,386 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-31 01:00:02,387 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 205 flow [2023-08-31 01:00:02,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:02,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:02,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:02,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:00:02,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:02,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:02,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1430537406, now seen corresponding path program 1 times [2023-08-31 01:00:02,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:02,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290072565] [2023-08-31 01:00:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:02,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:02,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:02,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290072565] [2023-08-31 01:00:02,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290072565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:00:02,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624884006] [2023-08-31 01:00:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:02,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:02,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:00:02,541 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 01:00:02,566 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 01:00:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 01:00:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:00:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:02,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:00:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624884006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:00:03,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:00:03,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 01:00:03,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246602457] [2023-08-31 01:00:03,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:00:03,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:00:03,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:00:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:00:03,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:03,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:03,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:03,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:03,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:04,228 INFO L130 PetriNetUnfolder]: 10865/13371 cut-off events. [2023-08-31 01:00:04,228 INFO L131 PetriNetUnfolder]: For 16553/16553 co-relation queries the response was YES. [2023-08-31 01:00:04,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39650 conditions, 13371 events. 10865/13371 cut-off events. For 16553/16553 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 47176 event pairs, 2521 based on Foata normal form. 336/13707 useless extension candidates. Maximal degree in co-relation 19156. Up to 5541 conditions per place. [2023-08-31 01:00:04,312 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 138 selfloop transitions, 8 changer transitions 0/146 dead transitions. [2023-08-31 01:00:04,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 146 transitions, 898 flow [2023-08-31 01:00:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 798 transitions. [2023-08-31 01:00:04,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5410169491525424 [2023-08-31 01:00:04,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 798 transitions. [2023-08-31 01:00:04,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 798 transitions. [2023-08-31 01:00:04,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:04,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 798 transitions. [2023-08-31 01:00:04,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.6) internal successors, (798), 5 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:04,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:04,321 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:04,321 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 205 flow. Second operand 5 states and 798 transitions. [2023-08-31 01:00:04,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 146 transitions, 898 flow [2023-08-31 01:00:04,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 146 transitions, 879 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:00:04,335 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 253 flow [2023-08-31 01:00:04,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2023-08-31 01:00:04,336 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2023-08-31 01:00:04,336 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 253 flow [2023-08-31 01:00:04,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:04,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:04,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:04,347 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 01:00:04,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:04,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:04,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash -204521481, now seen corresponding path program 2 times [2023-08-31 01:00:04,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:04,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023795328] [2023-08-31 01:00:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:04,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:04,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:04,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023795328] [2023-08-31 01:00:04,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023795328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:00:04,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054263709] [2023-08-31 01:00:04,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:00:04,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:04,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:00:04,770 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 01:00:04,792 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 01:00:04,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:00:04,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:00:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 01:00:04,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:00:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:05,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:00:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:05,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054263709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:00:05,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:00:05,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 01:00:05,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222373209] [2023-08-31 01:00:05,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:00:05,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:00:05,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:00:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:00:05,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:05,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:05,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:05,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:05,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:06,662 INFO L130 PetriNetUnfolder]: 13057/16015 cut-off events. [2023-08-31 01:00:06,663 INFO L131 PetriNetUnfolder]: For 28136/28136 co-relation queries the response was YES. [2023-08-31 01:00:06,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55836 conditions, 16015 events. 13057/16015 cut-off events. For 28136/28136 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 56951 event pairs, 4131 based on Foata normal form. 452/16467 useless extension candidates. Maximal degree in co-relation 28964. Up to 6947 conditions per place. [2023-08-31 01:00:06,763 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 134 selfloop transitions, 8 changer transitions 0/142 dead transitions. [2023-08-31 01:00:06,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 142 transitions, 885 flow [2023-08-31 01:00:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 796 transitions. [2023-08-31 01:00:06,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396610169491526 [2023-08-31 01:00:06,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 796 transitions. [2023-08-31 01:00:06,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 796 transitions. [2023-08-31 01:00:06,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:06,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 796 transitions. [2023-08-31 01:00:06,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:06,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:06,772 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:06,772 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 253 flow. Second operand 5 states and 796 transitions. [2023-08-31 01:00:06,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 142 transitions, 885 flow [2023-08-31 01:00:06,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 142 transitions, 885 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 01:00:06,858 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 303 flow [2023-08-31 01:00:06,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-08-31 01:00:06,861 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2023-08-31 01:00:06,863 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 303 flow [2023-08-31 01:00:06,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:06,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:06,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:06,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 01:00:07,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:07,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:07,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1843659482, now seen corresponding path program 1 times [2023-08-31 01:00:07,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:07,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464182776] [2023-08-31 01:00:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:07,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:07,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:07,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464182776] [2023-08-31 01:00:07,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464182776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:00:07,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:00:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:00:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894567202] [2023-08-31 01:00:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:00:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:00:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:00:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:00:07,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:07,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:07,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:07,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:07,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:08,596 INFO L130 PetriNetUnfolder]: 12765/15723 cut-off events. [2023-08-31 01:00:08,597 INFO L131 PetriNetUnfolder]: For 35246/35246 co-relation queries the response was YES. [2023-08-31 01:00:08,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57810 conditions, 15723 events. 12765/15723 cut-off events. For 35246/35246 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 58854 event pairs, 471 based on Foata normal form. 292/16015 useless extension candidates. Maximal degree in co-relation 39073. Up to 6655 conditions per place. [2023-08-31 01:00:08,795 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 152 selfloop transitions, 10 changer transitions 0/162 dead transitions. [2023-08-31 01:00:08,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 162 transitions, 1185 flow [2023-08-31 01:00:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 792 transitions. [2023-08-31 01:00:08,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369491525423729 [2023-08-31 01:00:08,799 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 792 transitions. [2023-08-31 01:00:08,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 792 transitions. [2023-08-31 01:00:08,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:08,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 792 transitions. [2023-08-31 01:00:08,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:08,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:08,804 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:08,804 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 303 flow. Second operand 5 states and 792 transitions. [2023-08-31 01:00:08,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 162 transitions, 1185 flow [2023-08-31 01:00:08,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 162 transitions, 1156 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-31 01:00:08,880 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 357 flow [2023-08-31 01:00:08,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-31 01:00:08,881 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2023-08-31 01:00:08,881 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 357 flow [2023-08-31 01:00:08,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:08,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:08,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:08,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:00:08,882 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:08,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:08,883 INFO L85 PathProgramCache]: Analyzing trace with hash 49168946, now seen corresponding path program 1 times [2023-08-31 01:00:08,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:08,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820425433] [2023-08-31 01:00:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:08,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:09,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820425433] [2023-08-31 01:00:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820425433] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:00:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273318871] [2023-08-31 01:00:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:09,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:00:09,073 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 01:00:09,110 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 01:00:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:09,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 01:00:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:00:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:09,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:00:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:09,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273318871] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:00:09,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:00:09,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 01:00:09,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274097847] [2023-08-31 01:00:09,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:00:09,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:00:09,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:09,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:00:09,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:00:09,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:09,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 357 flow. Second operand has 6 states, 6 states have (on average 144.33333333333334) internal successors, (866), 6 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:09,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:09,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:09,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:11,841 INFO L130 PetriNetUnfolder]: 28973/35717 cut-off events. [2023-08-31 01:00:11,842 INFO L131 PetriNetUnfolder]: For 94890/94890 co-relation queries the response was YES. [2023-08-31 01:00:11,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137761 conditions, 35717 events. 28973/35717 cut-off events. For 94890/94890 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 145456 event pairs, 5739 based on Foata normal form. 900/36617 useless extension candidates. Maximal degree in co-relation 88518. Up to 15928 conditions per place. [2023-08-31 01:00:12,258 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 179 selfloop transitions, 8 changer transitions 0/187 dead transitions. [2023-08-31 01:00:12,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 187 transitions, 1478 flow [2023-08-31 01:00:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 790 transitions. [2023-08-31 01:00:12,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535593220338983 [2023-08-31 01:00:12,261 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 790 transitions. [2023-08-31 01:00:12,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 790 transitions. [2023-08-31 01:00:12,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:12,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 790 transitions. [2023-08-31 01:00:12,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:12,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:12,266 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:12,266 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 357 flow. Second operand 5 states and 790 transitions. [2023-08-31 01:00:12,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 187 transitions, 1478 flow [2023-08-31 01:00:12,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 187 transitions, 1430 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-31 01:00:12,327 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 397 flow [2023-08-31 01:00:12,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-08-31 01:00:12,328 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-08-31 01:00:12,328 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 397 flow [2023-08-31 01:00:12,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.33333333333334) internal successors, (866), 6 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:12,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:12,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:12,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 01:00:12,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:12,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:12,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 757953015, now seen corresponding path program 1 times [2023-08-31 01:00:12,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:12,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694437615] [2023-08-31 01:00:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:12,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:12,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694437615] [2023-08-31 01:00:12,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694437615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:00:12,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:00:12,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:00:12,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179949288] [2023-08-31 01:00:12,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:00:12,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:00:12,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:00:12,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:00:12,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:12,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:12,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:12,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:12,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:14,827 INFO L130 PetriNetUnfolder]: 28517/35261 cut-off events. [2023-08-31 01:00:14,830 INFO L131 PetriNetUnfolder]: For 98216/98216 co-relation queries the response was YES. [2023-08-31 01:00:15,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150029 conditions, 35261 events. 28517/35261 cut-off events. For 98216/98216 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 146629 event pairs, 1619 based on Foata normal form. 456/35717 useless extension candidates. Maximal degree in co-relation 99537. Up to 15472 conditions per place. [2023-08-31 01:00:15,188 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 186 selfloop transitions, 10 changer transitions 0/196 dead transitions. [2023-08-31 01:00:15,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 196 transitions, 1571 flow [2023-08-31 01:00:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 788 transitions. [2023-08-31 01:00:15,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342372881355932 [2023-08-31 01:00:15,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 788 transitions. [2023-08-31 01:00:15,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 788 transitions. [2023-08-31 01:00:15,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:15,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 788 transitions. [2023-08-31 01:00:15,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:15,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:15,197 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:15,197 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 397 flow. Second operand 5 states and 788 transitions. [2023-08-31 01:00:15,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 196 transitions, 1571 flow [2023-08-31 01:00:15,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 196 transitions, 1571 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 01:00:15,597 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 460 flow [2023-08-31 01:00:15,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=460, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-08-31 01:00:15,598 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2023-08-31 01:00:15,598 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 460 flow [2023-08-31 01:00:15,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:15,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:15,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:15,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:00:15,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:15,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash -48523343, now seen corresponding path program 2 times [2023-08-31 01:00:15,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:15,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404139191] [2023-08-31 01:00:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:15,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:15,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:15,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404139191] [2023-08-31 01:00:15,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404139191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:00:15,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:00:15,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:00:15,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491058728] [2023-08-31 01:00:15,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:00:15,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:00:15,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:15,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:00:15,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:00:15,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:15,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:15,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:15,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:15,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:18,126 INFO L130 PetriNetUnfolder]: 32569/40201 cut-off events. [2023-08-31 01:00:18,126 INFO L131 PetriNetUnfolder]: For 118580/118580 co-relation queries the response was YES. [2023-08-31 01:00:18,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178904 conditions, 40201 events. 32569/40201 cut-off events. For 118580/118580 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 166776 event pairs, 5319 based on Foata normal form. 888/41089 useless extension candidates. Maximal degree in co-relation 118526. Up to 23661 conditions per place. [2023-08-31 01:00:18,439 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 178 selfloop transitions, 10 changer transitions 0/188 dead transitions. [2023-08-31 01:00:18,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 188 transitions, 1539 flow [2023-08-31 01:00:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 784 transitions. [2023-08-31 01:00:18,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5315254237288135 [2023-08-31 01:00:18,442 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 784 transitions. [2023-08-31 01:00:18,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 784 transitions. [2023-08-31 01:00:18,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:18,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 784 transitions. [2023-08-31 01:00:18,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:18,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:18,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:18,448 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 460 flow. Second operand 5 states and 784 transitions. [2023-08-31 01:00:18,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 188 transitions, 1539 flow [2023-08-31 01:00:19,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 188 transitions, 1524 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 01:00:19,082 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 499 flow [2023-08-31 01:00:19,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-08-31 01:00:19,083 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2023-08-31 01:00:19,083 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 499 flow [2023-08-31 01:00:19,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:19,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:19,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:19,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:00:19,084 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:19,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:19,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1305311766, now seen corresponding path program 2 times [2023-08-31 01:00:19,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:19,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277257612] [2023-08-31 01:00:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:19,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:19,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:19,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277257612] [2023-08-31 01:00:19,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277257612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:00:19,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:00:19,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:00:19,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946915703] [2023-08-31 01:00:19,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:00:19,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:00:19,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:00:19,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:00:19,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:19,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 499 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:19,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:19,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:19,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:22,325 INFO L130 PetriNetUnfolder]: 28961/35681 cut-off events. [2023-08-31 01:00:22,325 INFO L131 PetriNetUnfolder]: For 113304/113304 co-relation queries the response was YES. [2023-08-31 01:00:22,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165857 conditions, 35681 events. 28961/35681 cut-off events. For 113304/113304 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 145276 event pairs, 1643 based on Foata normal form. 444/36125 useless extension candidates. Maximal degree in co-relation 145228. Up to 15910 conditions per place. [2023-08-31 01:00:22,530 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 187 selfloop transitions, 9 changer transitions 0/196 dead transitions. [2023-08-31 01:00:22,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 196 transitions, 1625 flow [2023-08-31 01:00:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 787 transitions. [2023-08-31 01:00:22,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335593220338983 [2023-08-31 01:00:22,539 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 787 transitions. [2023-08-31 01:00:22,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 787 transitions. [2023-08-31 01:00:22,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:22,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 787 transitions. [2023-08-31 01:00:22,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.4) internal successors, (787), 5 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:22,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:22,543 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:22,543 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 499 flow. Second operand 5 states and 787 transitions. [2023-08-31 01:00:22,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 196 transitions, 1625 flow [2023-08-31 01:00:23,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 196 transitions, 1601 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-31 01:00:23,213 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 490 flow [2023-08-31 01:00:23,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=490, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2023-08-31 01:00:23,214 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2023-08-31 01:00:23,214 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 490 flow [2023-08-31 01:00:23,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:23,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:23,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:23,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 01:00:23,215 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:23,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1522859476, now seen corresponding path program 2 times [2023-08-31 01:00:23,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:23,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173350455] [2023-08-31 01:00:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:23,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:23,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:23,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173350455] [2023-08-31 01:00:23,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173350455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:00:23,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:00:23,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:00:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788746695] [2023-08-31 01:00:23,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:00:23,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:00:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:00:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:00:23,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:23,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 490 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:23,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:23,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:23,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:25,325 INFO L130 PetriNetUnfolder]: 24413/29993 cut-off events. [2023-08-31 01:00:25,325 INFO L131 PetriNetUnfolder]: For 112055/112055 co-relation queries the response was YES. [2023-08-31 01:00:25,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139706 conditions, 29993 events. 24413/29993 cut-off events. For 112055/112055 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 122857 event pairs, 885 based on Foata normal form. 508/30501 useless extension candidates. Maximal degree in co-relation 122129. Up to 13182 conditions per place. [2023-08-31 01:00:25,534 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 198 selfloop transitions, 9 changer transitions 0/207 dead transitions. [2023-08-31 01:00:25,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 207 transitions, 1776 flow [2023-08-31 01:00:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 791 transitions. [2023-08-31 01:00:25,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536271186440678 [2023-08-31 01:00:25,537 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 791 transitions. [2023-08-31 01:00:25,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 791 transitions. [2023-08-31 01:00:25,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:25,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 791 transitions. [2023-08-31 01:00:25,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.2) internal successors, (791), 5 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:25,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:25,542 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:25,542 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 490 flow. Second operand 5 states and 791 transitions. [2023-08-31 01:00:25,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 207 transitions, 1776 flow [2023-08-31 01:00:25,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 207 transitions, 1739 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-31 01:00:25,899 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 494 flow [2023-08-31 01:00:25,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=494, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-08-31 01:00:25,900 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 40 predicate places. [2023-08-31 01:00:25,900 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 494 flow [2023-08-31 01:00:25,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:25,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:25,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:25,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 01:00:25,901 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:25,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1825918594, now seen corresponding path program 2 times [2023-08-31 01:00:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55566604] [2023-08-31 01:00:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:25,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:26,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:26,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55566604] [2023-08-31 01:00:26,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55566604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:00:26,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978800050] [2023-08-31 01:00:26,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:00:26,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:00:26,041 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 01:00:26,044 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 01:00:26,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:00:26,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:00:26,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 01:00:26,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:00:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:26,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:00:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:26,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978800050] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:00:26,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:00:26,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 01:00:26,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668542198] [2023-08-31 01:00:26,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:00:26,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:00:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:00:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:00:26,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:26,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 494 flow. Second operand has 6 states, 6 states have (on average 145.33333333333334) internal successors, (872), 6 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:26,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:26,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:26,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:28,666 INFO L130 PetriNetUnfolder]: 29277/35873 cut-off events. [2023-08-31 01:00:28,666 INFO L131 PetriNetUnfolder]: For 124698/124698 co-relation queries the response was YES. [2023-08-31 01:00:28,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170952 conditions, 35873 events. 29277/35873 cut-off events. For 124698/124698 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 145192 event pairs, 5255 based on Foata normal form. 1016/36889 useless extension candidates. Maximal degree in co-relation 153598. Up to 20069 conditions per place. [2023-08-31 01:00:28,925 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 193 selfloop transitions, 8 changer transitions 0/201 dead transitions. [2023-08-31 01:00:28,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 201 transitions, 1711 flow [2023-08-31 01:00:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 788 transitions. [2023-08-31 01:00:28,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342372881355932 [2023-08-31 01:00:28,928 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 788 transitions. [2023-08-31 01:00:28,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 788 transitions. [2023-08-31 01:00:28,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:28,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 788 transitions. [2023-08-31 01:00:28,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:28,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:28,932 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:28,932 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 494 flow. Second operand 5 states and 788 transitions. [2023-08-31 01:00:28,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 201 transitions, 1711 flow [2023-08-31 01:00:29,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 201 transitions, 1702 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:00:29,301 INFO L231 Difference]: Finished difference. Result has 95 places, 76 transitions, 535 flow [2023-08-31 01:00:29,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=95, PETRI_TRANSITIONS=76} [2023-08-31 01:00:29,301 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2023-08-31 01:00:29,302 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 76 transitions, 535 flow [2023-08-31 01:00:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 145.33333333333334) internal successors, (872), 6 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:29,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:29,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:29,311 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 01:00:29,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:29,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:29,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:29,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1783679507, now seen corresponding path program 2 times [2023-08-31 01:00:29,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:29,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402516018] [2023-08-31 01:00:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:29,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:29,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:29,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402516018] [2023-08-31 01:00:29,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402516018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:00:29,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:00:29,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:00:29,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292035775] [2023-08-31 01:00:29,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:00:29,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:00:29,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:29,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:00:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:00:29,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2023-08-31 01:00:29,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 76 transitions, 535 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:29,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:29,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2023-08-31 01:00:29,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:32,374 INFO L130 PetriNetUnfolder]: 33421/40853 cut-off events. [2023-08-31 01:00:32,375 INFO L131 PetriNetUnfolder]: For 170067/170067 co-relation queries the response was YES. [2023-08-31 01:00:32,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204727 conditions, 40853 events. 33421/40853 cut-off events. For 170067/170067 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 162364 event pairs, 10579 based on Foata normal form. 836/41689 useless extension candidates. Maximal degree in co-relation 184652. Up to 23061 conditions per place. [2023-08-31 01:00:32,865 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 209 selfloop transitions, 8 changer transitions 0/217 dead transitions. [2023-08-31 01:00:32,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 217 transitions, 1913 flow [2023-08-31 01:00:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:00:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:00:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 792 transitions. [2023-08-31 01:00:32,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369491525423729 [2023-08-31 01:00:32,869 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 792 transitions. [2023-08-31 01:00:32,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 792 transitions. [2023-08-31 01:00:32,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:32,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 792 transitions. [2023-08-31 01:00:32,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:32,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:32,874 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:32,874 INFO L175 Difference]: Start difference. First operand has 95 places, 76 transitions, 535 flow. Second operand 5 states and 792 transitions. [2023-08-31 01:00:32,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 217 transitions, 1913 flow [2023-08-31 01:00:33,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 217 transitions, 1835 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-31 01:00:33,335 INFO L231 Difference]: Finished difference. Result has 99 places, 79 transitions, 568 flow [2023-08-31 01:00:33,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=568, PETRI_PLACES=99, PETRI_TRANSITIONS=79} [2023-08-31 01:00:33,336 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2023-08-31 01:00:33,337 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 79 transitions, 568 flow [2023-08-31 01:00:33,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:33,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:33,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:33,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 01:00:33,338 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:00:33,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:33,338 INFO L85 PathProgramCache]: Analyzing trace with hash 505429562, now seen corresponding path program 1 times [2023-08-31 01:00:33,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:33,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561793831] [2023-08-31 01:00:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:33,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:34,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:34,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561793831] [2023-08-31 01:00:34,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561793831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:00:34,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295910445] [2023-08-31 01:00:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:34,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:34,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:00:34,025 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 01:00:34,053 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 01:00:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:34,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:00:34,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:01:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:01:00,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:01:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:01:14,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295910445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:01:14,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:01:14,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-31 01:01:14,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853971825] [2023-08-31 01:01:14,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:01:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:01:14,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:01:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:01:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=167, Unknown=13, NotChecked=0, Total=240 [2023-08-31 01:01:16,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 295 [2023-08-31 01:01:16,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 79 transitions, 568 flow. Second operand has 16 states, 16 states have (on average 119.5) internal successors, (1912), 16 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:01:16,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:01:16,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 295 [2023-08-31 01:01:16,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:01:18,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:19,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:21,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:28,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:30,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:32,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:34,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:40,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:48,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:50,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:52,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:55,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:01:58,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:00,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:02,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:05,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:07,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:14,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:17,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:29,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:31,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:35,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:37,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:43,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:52,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:53,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:56,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:02:59,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:01,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:03,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:04,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:07,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:10,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:12,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:14,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:16,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:18,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:20,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:22,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:24,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:26,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:28,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:30,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:32,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:34,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:36,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:38,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:39,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:41,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:43,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:44,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:46,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:48,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:51,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:54,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:56,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:03:58,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:01,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:02,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:04,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:06,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:08,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:10,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:15,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:17,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:19,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:21,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:24,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:26,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:28,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:30,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:32,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:35,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:37,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:39,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:40,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:42,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:44,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:46,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:50,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:52,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:04:58,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:05:00,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:05:02,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:05:04,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:05:06,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:05:09,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:05:11,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:05:14,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:05:16,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:00,243 WARN L222 SmtUtils]: Spent 25.50s on a formula simplification. DAG size of input: 77 DAG size of output: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 01:06:00,441 INFO L130 PetriNetUnfolder]: 54004/66670 cut-off events. [2023-08-31 01:06:00,441 INFO L131 PetriNetUnfolder]: For 253744/253744 co-relation queries the response was YES. [2023-08-31 01:06:00,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332387 conditions, 66670 events. 54004/66670 cut-off events. For 253744/253744 co-relation queries the response was YES. Maximal size of possible extension queue 1623. Compared 295582 event pairs, 7597 based on Foata normal form. 69/66739 useless extension candidates. Maximal degree in co-relation 303917. Up to 46120 conditions per place. [2023-08-31 01:06:00,925 INFO L137 encePairwiseOnDemand]: 268/295 looper letters, 498 selfloop transitions, 277 changer transitions 18/793 dead transitions. [2023-08-31 01:06:00,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 793 transitions, 6665 flow [2023-08-31 01:06:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:06:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:06:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3130 transitions. [2023-08-31 01:06:00,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4613117170228445 [2023-08-31 01:06:00,932 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3130 transitions. [2023-08-31 01:06:00,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3130 transitions. [2023-08-31 01:06:00,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:06:00,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3130 transitions. [2023-08-31 01:06:00,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 136.08695652173913) internal successors, (3130), 23 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:00,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 295.0) internal successors, (7080), 24 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:00,947 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 295.0) internal successors, (7080), 24 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:00,948 INFO L175 Difference]: Start difference. First operand has 99 places, 79 transitions, 568 flow. Second operand 23 states and 3130 transitions. [2023-08-31 01:06:00,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 793 transitions, 6665 flow [2023-08-31 01:06:02,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 793 transitions, 6490 flow, removed 66 selfloop flow, removed 1 redundant places. [2023-08-31 01:06:02,457 INFO L231 Difference]: Finished difference. Result has 133 places, 357 transitions, 3769 flow [2023-08-31 01:06:02,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3769, PETRI_PLACES=133, PETRI_TRANSITIONS=357} [2023-08-31 01:06:02,458 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2023-08-31 01:06:02,458 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 357 transitions, 3769 flow [2023-08-31 01:06:02,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.5) internal successors, (1912), 16 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:02,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:06:02,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:06:02,465 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 01:06:02,664 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,SelfDestructingSolverStorable13 [2023-08-31 01:06:02,664 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:06:02,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:06:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1464858319, now seen corresponding path program 1 times [2023-08-31 01:06:02,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:06:02,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711516154] [2023-08-31 01:06:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:06:02,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:06:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:06:03,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:06:03,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711516154] [2023-08-31 01:06:03,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711516154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:06:03,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623190566] [2023-08-31 01:06:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:06:03,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:06:03,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:06:03,355 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 01:06:03,357 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 01:06:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:06:03,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:06:03,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:06:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:06:18,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:06:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:06:22,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623190566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:06:22,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:06:22,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-31 01:06:22,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464425911] [2023-08-31 01:06:22,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:06:22,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:06:22,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:06:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:06:22,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=168, Unknown=3, NotChecked=0, Total=240 [2023-08-31 01:06:25,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:27,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:29,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:31,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:33,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:34,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:36,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:38,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:40,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:42,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:42,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 295 [2023-08-31 01:06:42,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 357 transitions, 3769 flow. Second operand has 16 states, 16 states have (on average 119.6875) internal successors, (1915), 16 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:06:42,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:06:42,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 295 [2023-08-31 01:06:42,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:06:48,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:53,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:55,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:06:59,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:01,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:04,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:22,760 WARN L222 SmtUtils]: Spent 16.58s on a formula simplification. DAG size of input: 81 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 01:07:29,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:31,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:33,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:34,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:36,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:39,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:40,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:41,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:43,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:45,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:47,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:49,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:51,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:53,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:07:55,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:00,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:09,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:11,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:15,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:18,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:22,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:25,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:30,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:33,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:36,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:39,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:41,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:42,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:45,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:48,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:51,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:08:53,807 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 [] [2023-08-31 01:08:56,617 INFO L130 PetriNetUnfolder]: 70508/87360 cut-off events. [2023-08-31 01:08:56,617 INFO L131 PetriNetUnfolder]: For 470537/470537 co-relation queries the response was YES. [2023-08-31 01:08:57,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517511 conditions, 87360 events. 70508/87360 cut-off events. For 470537/470537 co-relation queries the response was YES. Maximal size of possible extension queue 2188. Compared 409392 event pairs, 7941 based on Foata normal form. 91/87451 useless extension candidates. Maximal degree in co-relation 517322. Up to 70738 conditions per place. [2023-08-31 01:08:57,788 INFO L137 encePairwiseOnDemand]: 278/295 looper letters, 719 selfloop transitions, 187 changer transitions 10/916 dead transitions. [2023-08-31 01:08:57,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 916 transitions, 9928 flow [2023-08-31 01:08:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:08:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:08:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2362 transitions. [2023-08-31 01:08:57,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47098703888335 [2023-08-31 01:08:57,794 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2362 transitions. [2023-08-31 01:08:57,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2362 transitions. [2023-08-31 01:08:57,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:08:57,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2362 transitions. [2023-08-31 01:08:57,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 138.94117647058823) internal successors, (2362), 17 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:57,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 295.0) internal successors, (5310), 18 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:57,805 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 295.0) internal successors, (5310), 18 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:08:57,806 INFO L175 Difference]: Start difference. First operand has 133 places, 357 transitions, 3769 flow. Second operand 17 states and 2362 transitions. [2023-08-31 01:08:57,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 916 transitions, 9928 flow [2023-08-31 01:09:02,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 916 transitions, 9521 flow, removed 200 selfloop flow, removed 2 redundant places. [2023-08-31 01:09:02,695 INFO L231 Difference]: Finished difference. Result has 157 places, 540 transitions, 5862 flow [2023-08-31 01:09:02,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5862, PETRI_PLACES=157, PETRI_TRANSITIONS=540} [2023-08-31 01:09:02,696 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2023-08-31 01:09:02,696 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 540 transitions, 5862 flow [2023-08-31 01:09:02,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.6875) internal successors, (1915), 16 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:09:02,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:09:02,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:09:02,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 01:09:02,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 01:09:02,903 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:09:02,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:09:02,903 INFO L85 PathProgramCache]: Analyzing trace with hash -136272884, now seen corresponding path program 2 times [2023-08-31 01:09:02,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:09:02,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824952414] [2023-08-31 01:09:02,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:09:02,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:09:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:09:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:09:03,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:09:03,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824952414] [2023-08-31 01:09:03,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824952414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:09:03,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183407477] [2023-08-31 01:09:03,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:09:03,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:09:03,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:09:03,613 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 01:09:03,620 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 01:09:03,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:09:03,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:09:03,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 01:09:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:09:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:09:45,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:10:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:10:20,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183407477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:10:20,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:10:20,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-31 01:10:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426216912] [2023-08-31 01:10:20,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:10:20,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:10:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:10:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:10:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=216, Unknown=4, NotChecked=0, Total=306 [2023-08-31 01:10:23,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:10:26,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:10:28,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:10:30,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:10:32,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:10:32,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 295 [2023-08-31 01:10:32,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 540 transitions, 5862 flow. Second operand has 18 states, 18 states have (on average 119.27777777777777) internal successors, (2147), 18 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:10:32,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:10:32,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 295 [2023-08-31 01:10:32,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:10:35,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:10:53,750 WARN L222 SmtUtils]: Spent 15.50s on a formula simplification. DAG size of input: 108 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 01:11:04,411 WARN L222 SmtUtils]: Spent 7.20s on a formula simplification. DAG size of input: 84 DAG size of output: 28 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 01:11:06,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:12,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:16,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:26,428 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse22 (* (- 2) c_~x5~0)) (.cse21 (* (div c_~x5~0 4294967296) 4294967296)) (.cse1 (* c_~x5~0 2)) (.cse19 (mod c_~x5~0 2147483648))) (let ((.cse3 (* 2 .cse19)) (.cse9 (div .cse1 4294967296)) (.cse4 (mod c_~n~0 4294967296)) (.cse7 (= (+ (* 4294967296 (div c_~x3~0 4294967296)) c_~x4~0) (+ c_~x3~0 (* (div c_~x4~0 4294967296) 4294967296)))) (.cse8 (= (+ c_~x1~0 (* (div c_~x2~0 4294967296) 4294967296)) (+ (* 4294967296 (div c_~x1~0 4294967296)) c_~x2~0))) (.cse0 (+ c_~x6~0 .cse21)) (.cse2 (- c_~x5~0)) (.cse10 (* (div c_~x6~0 4294967296) 4294967296)) (.cse23 (* (div (+ c_~x6~0 .cse22) 4294967296) 4294967296))) (and (<= .cse0 (+ .cse1 (* (div (+ (- 1) c_~x6~0 .cse2) 4294967296) 4294967296))) (or (< .cse3 .cse4) (let ((.cse6 (+ .cse10 .cse1)) (.cse5 (* .cse9 4294967296))) (and (<= (+ .cse5 c_~x6~0) .cse6) .cse7 .cse8 (< .cse6 (+ .cse5 c_~x6~0 1))))) (let ((.cse14 (mod c_~x1~0 4294967296))) (let ((.cse15 (mod c_~x6~0 4294967296)) (.cse16 (* 4294967296 (div (+ (- 1) (- .cse14)) 4294967296)))) (let ((.cse13 (+ .cse15 .cse16 8589934593 (* (div (+ (- 1) (- .cse19)) 2147483648) 4294967296))) (.cse12 (* (div .cse14 4294967296) 4294967296)) (.cse11 (mod c_~x6~0 2147483648))) (or (< (+ (* .cse11 2) .cse12) .cse13) (< .cse14 .cse13) (< (+ .cse12 .cse3 (* (div .cse11 2147483648) 4294967296)) (+ .cse15 .cse16 4294967297)) (let ((.cse18 (+ c_~x5~0 (* (div (* 2 c_~x6~0) 4294967296) 2147483648))) (.cse17 (* .cse9 2147483648))) (and (<= (+ .cse17 c_~x6~0) .cse18) (< .cse18 (+ .cse17 c_~x6~0 1)) .cse7 .cse8)))))) (or (< (mod c_~x5~0 4294967296) .cse4) (let ((.cse20 (+ .cse10 c_~x5~0))) (and .cse7 (<= .cse0 .cse20) .cse8 (< .cse20 (+ c_~x6~0 .cse21 1))))) .cse7 .cse8 (<= .cse0 (+ .cse10 .cse1 (* (div (+ 4294967294 .cse2) 4294967296) 4294967296))) (<= (+ (* (div (+ 2147483647 c_~n~0 .cse22) 2147483648) 2147483648) .cse10 .cse21 1) (+ .cse23 c_~x5~0 (* 4294967296 (div c_~n~0 4294967296)))) (<= (+ (* 2147483648 (div (+ 2147483647 c_~x6~0 .cse22) 2147483648)) .cse21 1) (+ .cse23 c_~x5~0))))) is different from false [2023-08-31 01:11:29,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:31,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:33,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:36,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:38,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:40,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:42,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:44,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:11:47,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:02,503 WARN L222 SmtUtils]: Spent 10.08s on a formula simplification. DAG size of input: 73 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 01:12:04,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:07,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:09,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:25,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:27,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:29,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:33,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:36,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:39,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:40,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:44,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:12:46,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:13:02,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:13:12,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:13:15,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:13:15,362 INFO L130 PetriNetUnfolder]: 96341/120265 cut-off events. [2023-08-31 01:13:15,363 INFO L131 PetriNetUnfolder]: For 895024/895024 co-relation queries the response was YES. [2023-08-31 01:13:16,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781615 conditions, 120265 events. 96341/120265 cut-off events. For 895024/895024 co-relation queries the response was YES. Maximal size of possible extension queue 3317. Compared 602722 event pairs, 7799 based on Foata normal form. 57/120322 useless extension candidates. Maximal degree in co-relation 769844. Up to 88494 conditions per place. [2023-08-31 01:13:17,338 INFO L137 encePairwiseOnDemand]: 272/295 looper letters, 892 selfloop transitions, 435 changer transitions 40/1367 dead transitions. [2023-08-31 01:13:17,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 1367 transitions, 16943 flow [2023-08-31 01:13:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:13:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:13:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3106 transitions. [2023-08-31 01:13:17,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45777450257921887 [2023-08-31 01:13:17,344 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3106 transitions. [2023-08-31 01:13:17,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3106 transitions. [2023-08-31 01:13:17,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:13:17,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3106 transitions. [2023-08-31 01:13:17,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 135.04347826086956) internal successors, (3106), 23 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:17,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 295.0) internal successors, (7080), 24 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:17,358 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 295.0) internal successors, (7080), 24 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:17,358 INFO L175 Difference]: Start difference. First operand has 157 places, 540 transitions, 5862 flow. Second operand 23 states and 3106 transitions. [2023-08-31 01:13:17,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 1367 transitions, 16943 flow [2023-08-31 01:13:27,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 1367 transitions, 15952 flow, removed 490 selfloop flow, removed 1 redundant places. [2023-08-31 01:13:27,398 INFO L231 Difference]: Finished difference. Result has 191 places, 926 transitions, 11604 flow [2023-08-31 01:13:27,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=5281, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11604, PETRI_PLACES=191, PETRI_TRANSITIONS=926} [2023-08-31 01:13:27,399 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 141 predicate places. [2023-08-31 01:13:27,399 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 926 transitions, 11604 flow [2023-08-31 01:13:27,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 119.27777777777777) internal successors, (2147), 18 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:13:27,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:13:27,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:13:27,406 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 01:13:27,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:27,602 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 01:13:27,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:13:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2120812465, now seen corresponding path program 2 times [2023-08-31 01:13:27,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:13:27,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758241966] [2023-08-31 01:13:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:13:27,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:13:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:13:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:13:28,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:13:28,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758241966] [2023-08-31 01:13:28,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758241966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:13:28,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546436311] [2023-08-31 01:13:28,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:13:28,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:13:28,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:13:28,313 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 01:13:28,317 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 01:13:28,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:13:28,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:13:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 01:13:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15