./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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 ../sv-benchmarks/c/weaver/test-easy11.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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:17:07,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:17:07,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:17:07,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:17:07,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:17:07,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:17:07,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:17:07,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:17:07,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:17:07,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:17:07,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:17:07,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:17:07,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:17:07,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:17:07,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:17:07,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:17:07,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:17:07,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:17:07,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:17:07,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:17:07,515 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:17:07,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:17:07,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:17:07,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:17:07,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:17:07,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:17:07,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:17:07,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:17:07,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:17:07,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:17:07,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:17:07,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:17:07,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:17:07,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:17:07,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:17:07,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:17:07,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:17:07,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:17:07,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:17:07,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:17:07,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:17:07,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:17:07,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:17:07,571 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:17:07,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:17:07,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:17:07,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:17:07,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:17:07,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:17:07,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:17:07,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:17:07,574 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:17:07,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:17:07,575 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:17:07,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:17:07,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:17:07,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:17:07,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:17:07,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:17:07,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:17:07,576 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:17:07,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:17:07,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:17:07,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:17:07,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:17:07,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:17:07,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:17:07,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:17:07,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:17:07,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:17:07,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:17:07,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:17:07,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:17:07,579 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:17:07,579 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:17:07,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:17:07,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-07-21 09:17:07,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:17:07,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:17:07,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:17:07,903 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:17:07,904 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:17:07,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-07-21 09:17:07,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76afb8d1c/7ebe02acd7364f338c85dd7b1e20658f/FLAG13db6aec5 [2022-07-21 09:17:08,390 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:17:08,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-07-21 09:17:08,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76afb8d1c/7ebe02acd7364f338c85dd7b1e20658f/FLAG13db6aec5 [2022-07-21 09:17:08,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76afb8d1c/7ebe02acd7364f338c85dd7b1e20658f [2022-07-21 09:17:08,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:17:08,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:17:08,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:17:08,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:17:08,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:17:08,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78cf8247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08, skipping insertion in model container [2022-07-21 09:17:08,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:17:08,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:17:08,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-07-21 09:17:08,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:17:08,613 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:17:08,640 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-07-21 09:17:08,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:17:08,658 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:17:08,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08 WrapperNode [2022-07-21 09:17:08,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:17:08,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:17:08,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:17:08,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:17:08,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,697 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-07-21 09:17:08,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:17:08,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:17:08,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:17:08,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:17:08,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:17:08,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:17:08,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:17:08,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:17:08,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (1/1) ... [2022-07-21 09:17:08,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:17:08,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:08,780 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) [2022-07-21 09:17:08,788 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 [2022-07-21 09:17:08,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:17:08,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:17:08,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:17:08,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:17:08,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:17:08,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:17:08,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:17:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:17:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:17:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:17:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:17:08,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:17:08,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:17:08,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:17:08,826 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:17:08,917 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:17:08,919 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:17:09,054 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:17:09,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:17:09,063 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:17:09,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:17:09 BoogieIcfgContainer [2022-07-21 09:17:09,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:17:09,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:17:09,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:17:09,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:17:09,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:17:08" (1/3) ... [2022-07-21 09:17:09,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cd6426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:17:09, skipping insertion in model container [2022-07-21 09:17:09,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:08" (2/3) ... [2022-07-21 09:17:09,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cd6426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:17:09, skipping insertion in model container [2022-07-21 09:17:09,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:17:09" (3/3) ... [2022-07-21 09:17:09,107 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-07-21 09:17:09,111 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:17:09,118 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:17:09,131 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:17:09,131 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:17:09,207 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:17:09,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-07-21 09:17:09,320 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-21 09:17:09,321 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:17:09,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-07-21 09:17:09,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-07-21 09:17:09,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-07-21 09:17:09,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:17:09,355 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@492adad6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a754e23 [2022-07-21 09:17:09,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:17:09,381 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-07-21 09:17:09,382 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:17:09,383 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:09,383 INFO L200 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, 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] [2022-07-21 09:17:09,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 988547457, now seen corresponding path program 1 times [2022-07-21 09:17:09,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:09,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977711848] [2022-07-21 09:17:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:09,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:09,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977711848] [2022-07-21 09:17:09,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977711848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:09,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:09,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:09,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712372913] [2022-07-21 09:17:09,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:09,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:09,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:09,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:09,998 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:10,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:10,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:10,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:10,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:10,399 INFO L129 PetriNetUnfolder]: 90/301 cut-off events. [2022-07-21 09:17:10,399 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-21 09:17:10,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 301 events. 90/301 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1193 event pairs, 29 based on Foata normal form. 3/266 useless extension candidates. Maximal degree in co-relation 412. Up to 60 conditions per place. [2022-07-21 09:17:10,405 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 55 selfloop transitions, 16 changer transitions 10/122 dead transitions. [2022-07-21 09:17:10,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 427 flow [2022-07-21 09:17:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:17:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:17:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-07-21 09:17:10,426 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6537356321839081 [2022-07-21 09:17:10,427 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-07-21 09:17:10,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-07-21 09:17:10,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:10,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-07-21 09:17:10,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:10,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 87.0) internal successors, (1479), 17 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:10,451 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 87.0) internal successors, (1479), 17 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:10,453 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 16 states and 910 transitions. [2022-07-21 09:17:10,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 427 flow [2022-07-21 09:17:10,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 413 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:17:10,481 INFO L242 Difference]: Finished difference. Result has 95 places, 82 transitions, 241 flow [2022-07-21 09:17:10,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=241, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2022-07-21 09:17:10,486 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 18 predicate places. [2022-07-21 09:17:10,486 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 241 flow [2022-07-21 09:17:10,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:10,487 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:10,488 INFO L200 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, 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] [2022-07-21 09:17:10,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:17:10,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:10,489 INFO L85 PathProgramCache]: Analyzing trace with hash -606779393, now seen corresponding path program 2 times [2022-07-21 09:17:10,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:10,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080610873] [2022-07-21 09:17:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:10,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:10,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:10,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080610873] [2022-07-21 09:17:10,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080610873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:10,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:10,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:10,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654780715] [2022-07-21 09:17:10,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:10,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:10,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:10,762 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:10,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:10,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:10,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:10,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:11,070 INFO L129 PetriNetUnfolder]: 137/421 cut-off events. [2022-07-21 09:17:11,071 INFO L130 PetriNetUnfolder]: For 160/162 co-relation queries the response was YES. [2022-07-21 09:17:11,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 421 events. 137/421 cut-off events. For 160/162 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2067 event pairs, 24 based on Foata normal form. 3/421 useless extension candidates. Maximal degree in co-relation 944. Up to 82 conditions per place. [2022-07-21 09:17:11,078 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 23 changer transitions 8/141 dead transitions. [2022-07-21 09:17:11,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 141 transitions, 660 flow [2022-07-21 09:17:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2022-07-21 09:17:11,081 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2022-07-21 09:17:11,082 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2022-07-21 09:17:11,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2022-07-21 09:17:11,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:11,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2022-07-21 09:17:11,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:11,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:11,088 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:11,088 INFO L186 Difference]: Start difference. First operand has 95 places, 82 transitions, 241 flow. Second operand 14 states and 799 transitions. [2022-07-21 09:17:11,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 141 transitions, 660 flow [2022-07-21 09:17:11,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 644 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-07-21 09:17:11,096 INFO L242 Difference]: Finished difference. Result has 102 places, 96 transitions, 382 flow [2022-07-21 09:17:11,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=382, PETRI_PLACES=102, PETRI_TRANSITIONS=96} [2022-07-21 09:17:11,097 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2022-07-21 09:17:11,097 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 96 transitions, 382 flow [2022-07-21 09:17:11,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:11,098 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:11,098 INFO L200 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, 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] [2022-07-21 09:17:11,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:17:11,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1133456201, now seen corresponding path program 3 times [2022-07-21 09:17:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:11,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859210101] [2022-07-21 09:17:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:11,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:11,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:11,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859210101] [2022-07-21 09:17:11,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859210101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:11,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:11,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:11,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970701883] [2022-07-21 09:17:11,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:11,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:11,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:11,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:11,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:11,373 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:11,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 96 transitions, 382 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:11,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:11,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:11,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:11,673 INFO L129 PetriNetUnfolder]: 140/436 cut-off events. [2022-07-21 09:17:11,673 INFO L130 PetriNetUnfolder]: For 442/446 co-relation queries the response was YES. [2022-07-21 09:17:11,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1207 conditions, 436 events. 140/436 cut-off events. For 442/446 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2103 event pairs, 32 based on Foata normal form. 5/434 useless extension candidates. Maximal degree in co-relation 1186. Up to 128 conditions per place. [2022-07-21 09:17:11,678 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 25 changer transitions 8/135 dead transitions. [2022-07-21 09:17:11,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 756 flow [2022-07-21 09:17:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-21 09:17:11,687 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-21 09:17:11,687 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-21 09:17:11,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-21 09:17:11,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:11,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-21 09:17:11,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 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) [2022-07-21 09:17:11,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:11,693 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:11,694 INFO L186 Difference]: Start difference. First operand has 102 places, 96 transitions, 382 flow. Second operand 14 states and 790 transitions. [2022-07-21 09:17:11,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 756 flow [2022-07-21 09:17:11,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 135 transitions, 696 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-07-21 09:17:11,704 INFO L242 Difference]: Finished difference. Result has 109 places, 101 transitions, 453 flow [2022-07-21 09:17:11,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=453, PETRI_PLACES=109, PETRI_TRANSITIONS=101} [2022-07-21 09:17:11,706 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 32 predicate places. [2022-07-21 09:17:11,707 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 101 transitions, 453 flow [2022-07-21 09:17:11,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:11,707 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:11,707 INFO L200 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, 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] [2022-07-21 09:17:11,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:17:11,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1891949299, now seen corresponding path program 4 times [2022-07-21 09:17:11,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:11,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778926040] [2022-07-21 09:17:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:11,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:11,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:11,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778926040] [2022-07-21 09:17:11,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778926040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:11,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:11,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:11,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900186148] [2022-07-21 09:17:11,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:11,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:11,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:11,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:11,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:11,908 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:11,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 101 transitions, 453 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:11,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:11,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:11,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:12,247 INFO L129 PetriNetUnfolder]: 142/415 cut-off events. [2022-07-21 09:17:12,247 INFO L130 PetriNetUnfolder]: For 571/578 co-relation queries the response was YES. [2022-07-21 09:17:12,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 415 events. 142/415 cut-off events. For 571/578 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2012 event pairs, 36 based on Foata normal form. 5/413 useless extension candidates. Maximal degree in co-relation 1237. Up to 128 conditions per place. [2022-07-21 09:17:12,251 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 30 changer transitions 8/142 dead transitions. [2022-07-21 09:17:12,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 142 transitions, 860 flow [2022-07-21 09:17:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-07-21 09:17:12,254 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-07-21 09:17:12,254 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-07-21 09:17:12,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-07-21 09:17:12,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:12,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-07-21 09:17:12,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 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) [2022-07-21 09:17:12,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:12,259 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:12,259 INFO L186 Difference]: Start difference. First operand has 109 places, 101 transitions, 453 flow. Second operand 14 states and 792 transitions. [2022-07-21 09:17:12,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 142 transitions, 860 flow [2022-07-21 09:17:12,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 142 transitions, 776 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-21 09:17:12,268 INFO L242 Difference]: Finished difference. Result has 113 places, 106 transitions, 522 flow [2022-07-21 09:17:12,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=522, PETRI_PLACES=113, PETRI_TRANSITIONS=106} [2022-07-21 09:17:12,270 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 36 predicate places. [2022-07-21 09:17:12,271 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 106 transitions, 522 flow [2022-07-21 09:17:12,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:12,271 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:12,272 INFO L200 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, 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] [2022-07-21 09:17:12,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:17:12,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1806850797, now seen corresponding path program 5 times [2022-07-21 09:17:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:12,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443158852] [2022-07-21 09:17:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:12,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:12,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443158852] [2022-07-21 09:17:12,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443158852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:12,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:12,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686171244] [2022-07-21 09:17:12,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:12,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:12,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:12,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:12,498 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:12,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 106 transitions, 522 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:12,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:12,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:12,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:12,832 INFO L129 PetriNetUnfolder]: 148/470 cut-off events. [2022-07-21 09:17:12,832 INFO L130 PetriNetUnfolder]: For 749/758 co-relation queries the response was YES. [2022-07-21 09:17:12,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1391 conditions, 470 events. 148/470 cut-off events. For 749/758 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2388 event pairs, 34 based on Foata normal form. 7/473 useless extension candidates. Maximal degree in co-relation 1366. Up to 131 conditions per place. [2022-07-21 09:17:12,837 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 30 changer transitions 8/146 dead transitions. [2022-07-21 09:17:12,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 146 transitions, 901 flow [2022-07-21 09:17:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-07-21 09:17:12,840 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-07-21 09:17:12,840 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-07-21 09:17:12,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-07-21 09:17:12,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:12,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-07-21 09:17:12,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 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) [2022-07-21 09:17:12,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:12,845 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:12,845 INFO L186 Difference]: Start difference. First operand has 113 places, 106 transitions, 522 flow. Second operand 14 states and 796 transitions. [2022-07-21 09:17:12,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 146 transitions, 901 flow [2022-07-21 09:17:12,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 146 transitions, 833 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-21 09:17:12,853 INFO L242 Difference]: Finished difference. Result has 116 places, 107 transitions, 540 flow [2022-07-21 09:17:12,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=540, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2022-07-21 09:17:12,855 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 39 predicate places. [2022-07-21 09:17:12,855 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 540 flow [2022-07-21 09:17:12,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:12,856 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:12,857 INFO L200 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, 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] [2022-07-21 09:17:12,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:17:12,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:12,858 INFO L85 PathProgramCache]: Analyzing trace with hash 338165169, now seen corresponding path program 6 times [2022-07-21 09:17:12,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:12,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284057808] [2022-07-21 09:17:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:12,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:13,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284057808] [2022-07-21 09:17:13,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284057808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:13,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:13,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 09:17:13,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154507455] [2022-07-21 09:17:13,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:13,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:17:13,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:17:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:17:13,084 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:13,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 540 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 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) [2022-07-21 09:17:13,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:13,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:13,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:13,371 INFO L129 PetriNetUnfolder]: 145/456 cut-off events. [2022-07-21 09:17:13,371 INFO L130 PetriNetUnfolder]: For 728/730 co-relation queries the response was YES. [2022-07-21 09:17:13,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 456 events. 145/456 cut-off events. For 728/730 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2339 event pairs, 29 based on Foata normal form. 3/454 useless extension candidates. Maximal degree in co-relation 1368. Up to 140 conditions per place. [2022-07-21 09:17:13,376 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 28 changer transitions 8/141 dead transitions. [2022-07-21 09:17:13,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 141 transitions, 890 flow [2022-07-21 09:17:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-21 09:17:13,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-21 09:17:13,378 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-21 09:17:13,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-21 09:17:13,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:13,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-21 09:17:13,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 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) [2022-07-21 09:17:13,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:13,383 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:13,383 INFO L186 Difference]: Start difference. First operand has 116 places, 107 transitions, 540 flow. Second operand 14 states and 790 transitions. [2022-07-21 09:17:13,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 141 transitions, 890 flow [2022-07-21 09:17:13,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 141 transitions, 816 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:13,390 INFO L242 Difference]: Finished difference. Result has 117 places, 105 transitions, 518 flow [2022-07-21 09:17:13,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=518, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2022-07-21 09:17:13,393 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2022-07-21 09:17:13,393 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 518 flow [2022-07-21 09:17:13,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 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) [2022-07-21 09:17:13,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:13,394 INFO L200 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, 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] [2022-07-21 09:17:13,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:17:13,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:13,395 INFO L85 PathProgramCache]: Analyzing trace with hash -210038721, now seen corresponding path program 7 times [2022-07-21 09:17:13,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562582023] [2022-07-21 09:17:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:13,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:13,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:13,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562582023] [2022-07-21 09:17:13,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562582023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:13,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:13,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 09:17:13,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106936776] [2022-07-21 09:17:13,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:13,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:17:13,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:13,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:17:13,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:17:13,608 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:13,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 518 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 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) [2022-07-21 09:17:13,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:13,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:13,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:13,908 INFO L129 PetriNetUnfolder]: 166/469 cut-off events. [2022-07-21 09:17:13,908 INFO L130 PetriNetUnfolder]: For 853/853 co-relation queries the response was YES. [2022-07-21 09:17:13,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 469 events. 166/469 cut-off events. For 853/853 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2299 event pairs, 41 based on Foata normal form. 1/459 useless extension candidates. Maximal degree in co-relation 1497. Up to 141 conditions per place. [2022-07-21 09:17:13,913 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 37 changer transitions 8/147 dead transitions. [2022-07-21 09:17:13,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 147 transitions, 975 flow [2022-07-21 09:17:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-07-21 09:17:13,916 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-07-21 09:17:13,916 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-07-21 09:17:13,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-07-21 09:17:13,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:13,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-07-21 09:17:13,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:13,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:13,921 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:13,921 INFO L186 Difference]: Start difference. First operand has 117 places, 105 transitions, 518 flow. Second operand 14 states and 794 transitions. [2022-07-21 09:17:13,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 147 transitions, 975 flow [2022-07-21 09:17:13,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 879 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:13,928 INFO L242 Difference]: Finished difference. Result has 119 places, 116 transitions, 669 flow [2022-07-21 09:17:13,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=669, PETRI_PLACES=119, PETRI_TRANSITIONS=116} [2022-07-21 09:17:13,928 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-07-21 09:17:13,929 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 669 flow [2022-07-21 09:17:13,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 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) [2022-07-21 09:17:13,929 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:13,930 INFO L200 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, 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] [2022-07-21 09:17:13,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:17:13,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1678747771, now seen corresponding path program 8 times [2022-07-21 09:17:13,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:13,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17755395] [2022-07-21 09:17:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:13,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17755395] [2022-07-21 09:17:14,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17755395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:14,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:14,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226708871] [2022-07-21 09:17:14,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:14,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:14,091 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:14,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 116 transitions, 669 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:14,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:14,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:14,406 INFO L129 PetriNetUnfolder]: 185/525 cut-off events. [2022-07-21 09:17:14,407 INFO L130 PetriNetUnfolder]: For 1263/1267 co-relation queries the response was YES. [2022-07-21 09:17:14,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 525 events. 185/525 cut-off events. For 1263/1267 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2704 event pairs, 29 based on Foata normal form. 3/523 useless extension candidates. Maximal degree in co-relation 1789. Up to 154 conditions per place. [2022-07-21 09:17:14,413 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 43 changer transitions 7/156 dead transitions. [2022-07-21 09:17:14,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 156 transitions, 1142 flow [2022-07-21 09:17:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-21 09:17:14,415 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-21 09:17:14,416 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-21 09:17:14,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-21 09:17:14,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:14,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-21 09:17:14,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,420 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,420 INFO L186 Difference]: Start difference. First operand has 119 places, 116 transitions, 669 flow. Second operand 14 states and 793 transitions. [2022-07-21 09:17:14,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 156 transitions, 1142 flow [2022-07-21 09:17:14,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1075 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-07-21 09:17:14,428 INFO L242 Difference]: Finished difference. Result has 126 places, 125 transitions, 850 flow [2022-07-21 09:17:14,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=850, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2022-07-21 09:17:14,429 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 49 predicate places. [2022-07-21 09:17:14,430 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 850 flow [2022-07-21 09:17:14,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,430 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:14,430 INFO L200 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, 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] [2022-07-21 09:17:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:17:14,431 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1095483919, now seen corresponding path program 9 times [2022-07-21 09:17:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:14,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181684644] [2022-07-21 09:17:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:14,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:14,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181684644] [2022-07-21 09:17:14,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181684644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:14,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:14,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:14,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598923398] [2022-07-21 09:17:14,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:14,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:14,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:14,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:14,593 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:14,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 850 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:14,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:14,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:14,910 INFO L129 PetriNetUnfolder]: 184/522 cut-off events. [2022-07-21 09:17:14,910 INFO L130 PetriNetUnfolder]: For 1694/1698 co-relation queries the response was YES. [2022-07-21 09:17:14,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1935 conditions, 522 events. 184/522 cut-off events. For 1694/1698 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2683 event pairs, 27 based on Foata normal form. 3/520 useless extension candidates. Maximal degree in co-relation 1903. Up to 153 conditions per place. [2022-07-21 09:17:14,916 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 44 changer transitions 7/157 dead transitions. [2022-07-21 09:17:14,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 157 transitions, 1247 flow [2022-07-21 09:17:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-21 09:17:14,918 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-21 09:17:14,918 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-21 09:17:14,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-21 09:17:14,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:14,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-21 09:17:14,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,922 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,922 INFO L186 Difference]: Start difference. First operand has 126 places, 125 transitions, 850 flow. Second operand 14 states and 793 transitions. [2022-07-21 09:17:14,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 157 transitions, 1247 flow [2022-07-21 09:17:14,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 157 transitions, 1163 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-07-21 09:17:14,931 INFO L242 Difference]: Finished difference. Result has 132 places, 127 transitions, 920 flow [2022-07-21 09:17:14,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=920, PETRI_PLACES=132, PETRI_TRANSITIONS=127} [2022-07-21 09:17:14,932 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-07-21 09:17:14,932 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 920 flow [2022-07-21 09:17:14,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:14,932 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:14,933 INFO L200 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, 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] [2022-07-21 09:17:14,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:17:14,933 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:14,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2108680237, now seen corresponding path program 10 times [2022-07-21 09:17:14,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:14,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376688002] [2022-07-21 09:17:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:14,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:15,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:15,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376688002] [2022-07-21 09:17:15,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376688002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:15,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:15,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:15,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105339581] [2022-07-21 09:17:15,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:15,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:15,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:15,087 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:15,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 127 transitions, 920 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:15,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:15,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:15,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:15,403 INFO L129 PetriNetUnfolder]: 180/503 cut-off events. [2022-07-21 09:17:15,403 INFO L130 PetriNetUnfolder]: For 2010/2010 co-relation queries the response was YES. [2022-07-21 09:17:15,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 503 events. 180/503 cut-off events. For 2010/2010 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2592 event pairs, 44 based on Foata normal form. 1/493 useless extension candidates. Maximal degree in co-relation 1905. Up to 143 conditions per place. [2022-07-21 09:17:15,409 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 44 changer transitions 7/160 dead transitions. [2022-07-21 09:17:15,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 1297 flow [2022-07-21 09:17:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-07-21 09:17:15,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-07-21 09:17:15,411 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-07-21 09:17:15,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-07-21 09:17:15,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:15,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-07-21 09:17:15,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 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) [2022-07-21 09:17:15,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:15,415 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:15,416 INFO L186 Difference]: Start difference. First operand has 132 places, 127 transitions, 920 flow. Second operand 14 states and 795 transitions. [2022-07-21 09:17:15,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 1297 flow [2022-07-21 09:17:15,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 160 transitions, 1201 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-07-21 09:17:15,426 INFO L242 Difference]: Finished difference. Result has 136 places, 128 transitions, 938 flow [2022-07-21 09:17:15,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=938, PETRI_PLACES=136, PETRI_TRANSITIONS=128} [2022-07-21 09:17:15,428 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-07-21 09:17:15,428 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 938 flow [2022-07-21 09:17:15,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:15,429 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:15,429 INFO L200 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, 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] [2022-07-21 09:17:15,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:17:15,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2083365095, now seen corresponding path program 11 times [2022-07-21 09:17:15,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:15,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816549125] [2022-07-21 09:17:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:15,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:15,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:15,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816549125] [2022-07-21 09:17:15,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816549125] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:15,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:15,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:15,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126183109] [2022-07-21 09:17:15,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:15,603 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:15,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 128 transitions, 938 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:15,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:15,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:15,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:15,915 INFO L129 PetriNetUnfolder]: 180/498 cut-off events. [2022-07-21 09:17:15,915 INFO L130 PetriNetUnfolder]: For 1977/1979 co-relation queries the response was YES. [2022-07-21 09:17:15,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 498 events. 180/498 cut-off events. For 1977/1979 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2596 event pairs, 37 based on Foata normal form. 1/490 useless extension candidates. Maximal degree in co-relation 1909. Up to 147 conditions per place. [2022-07-21 09:17:15,920 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 42 changer transitions 9/158 dead transitions. [2022-07-21 09:17:15,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 158 transitions, 1295 flow [2022-07-21 09:17:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-21 09:17:15,922 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-21 09:17:15,922 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-21 09:17:15,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-21 09:17:15,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:15,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-21 09:17:15,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:15,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:15,926 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:15,926 INFO L186 Difference]: Start difference. First operand has 136 places, 128 transitions, 938 flow. Second operand 14 states and 793 transitions. [2022-07-21 09:17:15,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 158 transitions, 1295 flow [2022-07-21 09:17:15,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 158 transitions, 1193 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:15,937 INFO L242 Difference]: Finished difference. Result has 137 places, 126 transitions, 905 flow [2022-07-21 09:17:15,938 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=905, PETRI_PLACES=137, PETRI_TRANSITIONS=126} [2022-07-21 09:17:15,938 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-21 09:17:15,938 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 126 transitions, 905 flow [2022-07-21 09:17:15,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:15,939 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:15,939 INFO L200 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, 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] [2022-07-21 09:17:15,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 09:17:15,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash 536902577, now seen corresponding path program 12 times [2022-07-21 09:17:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:15,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256257052] [2022-07-21 09:17:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:15,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:16,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:16,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256257052] [2022-07-21 09:17:16,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256257052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:16,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:16,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:16,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146845202] [2022-07-21 09:17:16,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:16,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:16,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:16,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:16,091 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:16,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 126 transitions, 905 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:16,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:16,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:16,394 INFO L129 PetriNetUnfolder]: 185/534 cut-off events. [2022-07-21 09:17:16,394 INFO L130 PetriNetUnfolder]: For 2069/2069 co-relation queries the response was YES. [2022-07-21 09:17:16,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 534 events. 185/534 cut-off events. For 2069/2069 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2892 event pairs, 41 based on Foata normal form. 1/525 useless extension candidates. Maximal degree in co-relation 1965. Up to 147 conditions per place. [2022-07-21 09:17:16,401 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 44 changer transitions 8/162 dead transitions. [2022-07-21 09:17:16,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 162 transitions, 1303 flow [2022-07-21 09:17:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2022-07-21 09:17:16,403 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2022-07-21 09:17:16,403 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2022-07-21 09:17:16,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2022-07-21 09:17:16,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:16,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2022-07-21 09:17:16,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,408 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,408 INFO L186 Difference]: Start difference. First operand has 137 places, 126 transitions, 905 flow. Second operand 14 states and 797 transitions. [2022-07-21 09:17:16,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 162 transitions, 1303 flow [2022-07-21 09:17:16,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 162 transitions, 1201 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:16,418 INFO L242 Difference]: Finished difference. Result has 137 places, 128 transitions, 929 flow [2022-07-21 09:17:16,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=929, PETRI_PLACES=137, PETRI_TRANSITIONS=128} [2022-07-21 09:17:16,419 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-21 09:17:16,419 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 128 transitions, 929 flow [2022-07-21 09:17:16,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:16,420 INFO L200 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, 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] [2022-07-21 09:17:16,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 09:17:16,421 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:16,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1478478085, now seen corresponding path program 13 times [2022-07-21 09:17:16,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:16,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000432309] [2022-07-21 09:17:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:16,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:16,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:16,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000432309] [2022-07-21 09:17:16,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000432309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:16,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:16,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:16,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354218313] [2022-07-21 09:17:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:16,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:16,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:16,576 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:16,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 128 transitions, 929 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:16,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:16,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:16,896 INFO L129 PetriNetUnfolder]: 186/555 cut-off events. [2022-07-21 09:17:16,896 INFO L130 PetriNetUnfolder]: For 2147/2151 co-relation queries the response was YES. [2022-07-21 09:17:16,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 555 events. 186/555 cut-off events. For 2147/2151 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3037 event pairs, 30 based on Foata normal form. 3/552 useless extension candidates. Maximal degree in co-relation 2013. Up to 163 conditions per place. [2022-07-21 09:17:16,902 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 40 changer transitions 9/157 dead transitions. [2022-07-21 09:17:16,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 157 transitions, 1284 flow [2022-07-21 09:17:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-07-21 09:17:16,912 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-07-21 09:17:16,912 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-07-21 09:17:16,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-07-21 09:17:16,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:16,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-07-21 09:17:16,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 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) [2022-07-21 09:17:16,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,919 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,919 INFO L186 Difference]: Start difference. First operand has 137 places, 128 transitions, 929 flow. Second operand 14 states and 792 transitions. [2022-07-21 09:17:16,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 157 transitions, 1284 flow [2022-07-21 09:17:16,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 157 transitions, 1182 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:16,932 INFO L242 Difference]: Finished difference. Result has 137 places, 125 transitions, 882 flow [2022-07-21 09:17:16,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=882, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2022-07-21 09:17:16,933 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-21 09:17:16,934 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 882 flow [2022-07-21 09:17:16,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:16,934 INFO L200 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, 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] [2022-07-21 09:17:16,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 09:17:16,935 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:16,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1731083455, now seen corresponding path program 14 times [2022-07-21 09:17:16,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:16,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178467172] [2022-07-21 09:17:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:17,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:17,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178467172] [2022-07-21 09:17:17,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178467172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:17,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:17,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:17,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001997102] [2022-07-21 09:17:17,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:17,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:17,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:17,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:17,094 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:17,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 882 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:17,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:17,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:17,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:17,437 INFO L129 PetriNetUnfolder]: 181/515 cut-off events. [2022-07-21 09:17:17,437 INFO L130 PetriNetUnfolder]: For 2031/2033 co-relation queries the response was YES. [2022-07-21 09:17:17,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 515 events. 181/515 cut-off events. For 2031/2033 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2700 event pairs, 46 based on Foata normal form. 1/504 useless extension candidates. Maximal degree in co-relation 1920. Up to 154 conditions per place. [2022-07-21 09:17:17,443 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 42 changer transitions 8/157 dead transitions. [2022-07-21 09:17:17,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 157 transitions, 1278 flow [2022-07-21 09:17:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-21 09:17:17,445 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-21 09:17:17,445 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-21 09:17:17,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-21 09:17:17,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:17,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-21 09:17:17,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:17,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:17,450 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:17,450 INFO L186 Difference]: Start difference. First operand has 137 places, 125 transitions, 882 flow. Second operand 14 states and 793 transitions. [2022-07-21 09:17:17,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 157 transitions, 1278 flow [2022-07-21 09:17:17,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 157 transitions, 1180 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-21 09:17:17,469 INFO L242 Difference]: Finished difference. Result has 139 places, 127 transitions, 926 flow [2022-07-21 09:17:17,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=926, PETRI_PLACES=139, PETRI_TRANSITIONS=127} [2022-07-21 09:17:17,470 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 62 predicate places. [2022-07-21 09:17:17,470 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 127 transitions, 926 flow [2022-07-21 09:17:17,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:17,470 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:17,471 INFO L200 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, 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] [2022-07-21 09:17:17,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 09:17:17,471 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524753, now seen corresponding path program 15 times [2022-07-21 09:17:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:17,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90242351] [2022-07-21 09:17:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:17,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:17,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90242351] [2022-07-21 09:17:17,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90242351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:17,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:17,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:17,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522033609] [2022-07-21 09:17:17,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:17,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:17,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:17,624 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:17,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 127 transitions, 926 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:17,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:17,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:17,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:17,911 INFO L129 PetriNetUnfolder]: 179/508 cut-off events. [2022-07-21 09:17:17,911 INFO L130 PetriNetUnfolder]: For 2057/2059 co-relation queries the response was YES. [2022-07-21 09:17:17,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 508 events. 179/508 cut-off events. For 2057/2059 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2683 event pairs, 50 based on Foata normal form. 1/497 useless extension candidates. Maximal degree in co-relation 1937. Up to 153 conditions per place. [2022-07-21 09:17:17,917 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 38 changer transitions 8/157 dead transitions. [2022-07-21 09:17:17,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 157 transitions, 1312 flow [2022-07-21 09:17:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:17,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2022-07-21 09:17:17,919 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2022-07-21 09:17:17,919 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2022-07-21 09:17:17,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2022-07-21 09:17:17,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:17,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2022-07-21 09:17:17,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 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) [2022-07-21 09:17:17,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:17,924 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:17,924 INFO L186 Difference]: Start difference. First operand has 139 places, 127 transitions, 926 flow. Second operand 14 states and 788 transitions. [2022-07-21 09:17:17,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 157 transitions, 1312 flow [2022-07-21 09:17:17,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 157 transitions, 1235 flow, removed 7 selfloop flow, removed 10 redundant places. [2022-07-21 09:17:17,935 INFO L242 Difference]: Finished difference. Result has 142 places, 125 transitions, 911 flow [2022-07-21 09:17:17,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=911, PETRI_PLACES=142, PETRI_TRANSITIONS=125} [2022-07-21 09:17:17,936 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 65 predicate places. [2022-07-21 09:17:17,936 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 125 transitions, 911 flow [2022-07-21 09:17:17,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:17,936 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:17,936 INFO L200 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, 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] [2022-07-21 09:17:17,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:17:17,937 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:17,937 INFO L85 PathProgramCache]: Analyzing trace with hash 967734761, now seen corresponding path program 16 times [2022-07-21 09:17:17,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:17,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54501471] [2022-07-21 09:17:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:17,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54501471] [2022-07-21 09:17:18,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54501471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:18,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:18,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592293688] [2022-07-21 09:17:18,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:18,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:18,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:18,101 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:18,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 125 transitions, 911 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:18,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:18,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:18,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:18,399 INFO L129 PetriNetUnfolder]: 183/550 cut-off events. [2022-07-21 09:17:18,399 INFO L130 PetriNetUnfolder]: For 2125/2129 co-relation queries the response was YES. [2022-07-21 09:17:18,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 550 events. 183/550 cut-off events. For 2125/2129 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2994 event pairs, 42 based on Foata normal form. 3/544 useless extension candidates. Maximal degree in co-relation 2011. Up to 159 conditions per place. [2022-07-21 09:17:18,405 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 39 changer transitions 7/159 dead transitions. [2022-07-21 09:17:18,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 159 transitions, 1325 flow [2022-07-21 09:17:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-21 09:17:18,407 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-21 09:17:18,408 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-21 09:17:18,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-21 09:17:18,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:18,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-21 09:17:18,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 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) [2022-07-21 09:17:18,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:18,418 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:18,419 INFO L186 Difference]: Start difference. First operand has 142 places, 125 transitions, 911 flow. Second operand 14 states and 790 transitions. [2022-07-21 09:17:18,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 159 transitions, 1325 flow [2022-07-21 09:17:18,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 159 transitions, 1235 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:18,433 INFO L242 Difference]: Finished difference. Result has 142 places, 126 transitions, 927 flow [2022-07-21 09:17:18,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=927, PETRI_PLACES=142, PETRI_TRANSITIONS=126} [2022-07-21 09:17:18,434 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 65 predicate places. [2022-07-21 09:17:18,434 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 126 transitions, 927 flow [2022-07-21 09:17:18,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:18,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:18,435 INFO L200 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, 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] [2022-07-21 09:17:18,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 09:17:18,435 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash 18414173, now seen corresponding path program 17 times [2022-07-21 09:17:18,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:18,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997652450] [2022-07-21 09:17:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:18,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:18,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997652450] [2022-07-21 09:17:18,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997652450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:18,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:18,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:18,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877658891] [2022-07-21 09:17:18,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:18,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:18,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:18,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:18,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:18,578 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:18,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 126 transitions, 927 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:18,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:18,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:18,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:18,868 INFO L129 PetriNetUnfolder]: 182/549 cut-off events. [2022-07-21 09:17:18,869 INFO L130 PetriNetUnfolder]: For 2195/2199 co-relation queries the response was YES. [2022-07-21 09:17:18,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 549 events. 182/549 cut-off events. For 2195/2199 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2995 event pairs, 36 based on Foata normal form. 3/543 useless extension candidates. Maximal degree in co-relation 2023. Up to 163 conditions per place. [2022-07-21 09:17:18,874 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 38 changer transitions 8/154 dead transitions. [2022-07-21 09:17:18,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 154 transitions, 1287 flow [2022-07-21 09:17:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-07-21 09:17:18,877 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-07-21 09:17:18,878 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-07-21 09:17:18,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-07-21 09:17:18,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:18,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-07-21 09:17:18,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 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) [2022-07-21 09:17:18,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:18,882 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:18,882 INFO L186 Difference]: Start difference. First operand has 142 places, 126 transitions, 927 flow. Second operand 14 states and 791 transitions. [2022-07-21 09:17:18,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 154 transitions, 1287 flow [2022-07-21 09:17:18,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 154 transitions, 1191 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:18,895 INFO L242 Difference]: Finished difference. Result has 143 places, 124 transitions, 895 flow [2022-07-21 09:17:18,895 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=895, PETRI_PLACES=143, PETRI_TRANSITIONS=124} [2022-07-21 09:17:18,896 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-07-21 09:17:18,896 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 124 transitions, 895 flow [2022-07-21 09:17:18,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:18,896 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:18,897 INFO L200 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, 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] [2022-07-21 09:17:18,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 09:17:18,897 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:18,897 INFO L85 PathProgramCache]: Analyzing trace with hash 386002791, now seen corresponding path program 18 times [2022-07-21 09:17:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:18,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533651735] [2022-07-21 09:17:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:18,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533651735] [2022-07-21 09:17:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533651735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:19,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:19,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329178956] [2022-07-21 09:17:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:19,044 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:19,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 124 transitions, 895 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:19,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:19,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:19,399 INFO L129 PetriNetUnfolder]: 177/518 cut-off events. [2022-07-21 09:17:19,399 INFO L130 PetriNetUnfolder]: For 2182/2184 co-relation queries the response was YES. [2022-07-21 09:17:19,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 518 events. 177/518 cut-off events. For 2182/2184 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2810 event pairs, 45 based on Foata normal form. 1/507 useless extension candidates. Maximal degree in co-relation 1957. Up to 151 conditions per place. [2022-07-21 09:17:19,404 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 40 changer transitions 7/157 dead transitions. [2022-07-21 09:17:19,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1294 flow [2022-07-21 09:17:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-07-21 09:17:19,406 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-07-21 09:17:19,406 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-07-21 09:17:19,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-07-21 09:17:19,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:19,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-07-21 09:17:19,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,410 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,410 INFO L186 Difference]: Start difference. First operand has 143 places, 124 transitions, 895 flow. Second operand 14 states and 794 transitions. [2022-07-21 09:17:19,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1294 flow [2022-07-21 09:17:19,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 157 transitions, 1202 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:19,421 INFO L242 Difference]: Finished difference. Result has 143 places, 126 transitions, 924 flow [2022-07-21 09:17:19,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=924, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2022-07-21 09:17:19,421 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-07-21 09:17:19,421 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 924 flow [2022-07-21 09:17:19,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,422 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:19,422 INFO L200 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, 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] [2022-07-21 09:17:19,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 09:17:19,422 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash -730886041, now seen corresponding path program 19 times [2022-07-21 09:17:19,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:19,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879181797] [2022-07-21 09:17:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:19,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:19,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:19,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879181797] [2022-07-21 09:17:19,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879181797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:19,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:19,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:19,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850537383] [2022-07-21 09:17:19,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:19,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:19,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:19,577 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:19,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 924 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:19,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:19,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:19,905 INFO L129 PetriNetUnfolder]: 183/565 cut-off events. [2022-07-21 09:17:19,905 INFO L130 PetriNetUnfolder]: For 2365/2369 co-relation queries the response was YES. [2022-07-21 09:17:19,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 565 events. 183/565 cut-off events. For 2365/2369 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3192 event pairs, 39 based on Foata normal form. 3/560 useless extension candidates. Maximal degree in co-relation 2060. Up to 159 conditions per place. [2022-07-21 09:17:19,911 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 73 selfloop transitions, 38 changer transitions 8/160 dead transitions. [2022-07-21 09:17:19,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 160 transitions, 1329 flow [2022-07-21 09:17:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-07-21 09:17:19,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-07-21 09:17:19,913 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-07-21 09:17:19,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-07-21 09:17:19,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:19,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-07-21 09:17:19,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 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) [2022-07-21 09:17:19,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,917 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,917 INFO L186 Difference]: Start difference. First operand has 143 places, 126 transitions, 924 flow. Second operand 14 states and 796 transitions. [2022-07-21 09:17:19,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 160 transitions, 1329 flow [2022-07-21 09:17:19,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 160 transitions, 1233 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:19,929 INFO L242 Difference]: Finished difference. Result has 145 places, 127 transitions, 932 flow [2022-07-21 09:17:19,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=932, PETRI_PLACES=145, PETRI_TRANSITIONS=127} [2022-07-21 09:17:19,930 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-07-21 09:17:19,930 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 127 transitions, 932 flow [2022-07-21 09:17:19,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,931 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:19,931 INFO L200 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, 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] [2022-07-21 09:17:19,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 09:17:19,931 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:19,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1585546923, now seen corresponding path program 20 times [2022-07-21 09:17:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:19,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165527921] [2022-07-21 09:17:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:19,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:20,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165527921] [2022-07-21 09:17:20,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165527921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:20,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:20,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:17:20,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436438604] [2022-07-21 09:17:20,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:20,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:17:20,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:20,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:17:20,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:17:20,093 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:17:20,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 127 transitions, 932 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:20,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:17:20,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:20,395 INFO L129 PetriNetUnfolder]: 180/558 cut-off events. [2022-07-21 09:17:20,395 INFO L130 PetriNetUnfolder]: For 2427/2431 co-relation queries the response was YES. [2022-07-21 09:17:20,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 558 events. 180/558 cut-off events. For 2427/2431 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3103 event pairs, 39 based on Foata normal form. 3/553 useless extension candidates. Maximal degree in co-relation 2058. Up to 167 conditions per place. [2022-07-21 09:17:20,402 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 36 changer transitions 8/154 dead transitions. [2022-07-21 09:17:20,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 1291 flow [2022-07-21 09:17:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:17:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:17:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-21 09:17:20,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-21 09:17:20,404 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-21 09:17:20,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-21 09:17:20,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:20,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-21 09:17:20,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 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) [2022-07-21 09:17:20,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,411 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,411 INFO L186 Difference]: Start difference. First operand has 145 places, 127 transitions, 932 flow. Second operand 14 states and 790 transitions. [2022-07-21 09:17:20,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 1291 flow [2022-07-21 09:17:20,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 154 transitions, 1197 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:20,423 INFO L242 Difference]: Finished difference. Result has 145 places, 124 transitions, 885 flow [2022-07-21 09:17:20,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=885, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2022-07-21 09:17:20,425 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-07-21 09:17:20,425 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 885 flow [2022-07-21 09:17:20,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,425 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:20,425 INFO L200 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, 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] [2022-07-21 09:17:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 09:17:20,426 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash -859363161, now seen corresponding path program 1 times [2022-07-21 09:17:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:20,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295625580] [2022-07-21 09:17:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:20,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:20,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295625580] [2022-07-21 09:17:20,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295625580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119998836] [2022-07-21 09:17:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:20,455 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) [2022-07-21 09:17:20,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:17:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:17:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:20,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:20,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119998836] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:20,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:17:20,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-07-21 09:17:20,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657882019] [2022-07-21 09:17:20,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:20,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:20,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:20,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:20,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:17:20,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:20,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 885 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:20,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:20,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:20,810 INFO L129 PetriNetUnfolder]: 187/539 cut-off events. [2022-07-21 09:17:20,810 INFO L130 PetriNetUnfolder]: For 2641/2643 co-relation queries the response was YES. [2022-07-21 09:17:20,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2090 conditions, 539 events. 187/539 cut-off events. For 2641/2643 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2886 event pairs, 14 based on Foata normal form. 8/541 useless extension candidates. Maximal degree in co-relation 2047. Up to 139 conditions per place. [2022-07-21 09:17:20,815 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2022-07-21 09:17:20,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 176 transitions, 1659 flow [2022-07-21 09:17:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:17:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:17:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-07-21 09:17:20,816 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-07-21 09:17:20,817 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-07-21 09:17:20,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-07-21 09:17:20,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:20,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-07-21 09:17:20,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,819 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,819 INFO L186 Difference]: Start difference. First operand has 145 places, 124 transitions, 885 flow. Second operand 7 states and 483 transitions. [2022-07-21 09:17:20,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 176 transitions, 1659 flow [2022-07-21 09:17:20,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 176 transitions, 1537 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-07-21 09:17:20,830 INFO L242 Difference]: Finished difference. Result has 136 places, 139 transitions, 1049 flow [2022-07-21 09:17:20,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1049, PETRI_PLACES=136, PETRI_TRANSITIONS=139} [2022-07-21 09:17:20,831 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-07-21 09:17:20,831 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 139 transitions, 1049 flow [2022-07-21 09:17:20,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:20,832 INFO L200 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, 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] [2022-07-21 09:17:20,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:21,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 09:17:21,045 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1370591913, now seen corresponding path program 2 times [2022-07-21 09:17:21,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:21,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676582937] [2022-07-21 09:17:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:21,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:21,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676582937] [2022-07-21 09:17:21,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676582937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:21,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:21,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:17:21,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237435752] [2022-07-21 09:17:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:21,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:21,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:17:21,076 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:21,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 139 transitions, 1049 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:21,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:21,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:21,220 INFO L129 PetriNetUnfolder]: 219/656 cut-off events. [2022-07-21 09:17:21,221 INFO L130 PetriNetUnfolder]: For 3315/3326 co-relation queries the response was YES. [2022-07-21 09:17:21,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 656 events. 219/656 cut-off events. For 3315/3326 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3838 event pairs, 53 based on Foata normal form. 4/651 useless extension candidates. Maximal degree in co-relation 2358. Up to 144 conditions per place. [2022-07-21 09:17:21,230 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2022-07-21 09:17:21,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 1835 flow [2022-07-21 09:17:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:17:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:17:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2022-07-21 09:17:21,233 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2022-07-21 09:17:21,234 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2022-07-21 09:17:21,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2022-07-21 09:17:21,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:21,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2022-07-21 09:17:21,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,237 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,237 INFO L186 Difference]: Start difference. First operand has 136 places, 139 transitions, 1049 flow. Second operand 8 states and 561 transitions. [2022-07-21 09:17:21,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 1835 flow [2022-07-21 09:17:21,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1789 flow, removed 23 selfloop flow, removed 0 redundant places. [2022-07-21 09:17:21,255 INFO L242 Difference]: Finished difference. Result has 149 places, 156 transitions, 1411 flow [2022-07-21 09:17:21,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1411, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2022-07-21 09:17:21,256 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2022-07-21 09:17:21,256 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1411 flow [2022-07-21 09:17:21,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:21,257 INFO L200 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, 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] [2022-07-21 09:17:21,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 09:17:21,257 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:21,258 INFO L85 PathProgramCache]: Analyzing trace with hash -212945927, now seen corresponding path program 1 times [2022-07-21 09:17:21,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:21,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267809023] [2022-07-21 09:17:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:21,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:21,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:21,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267809023] [2022-07-21 09:17:21,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267809023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:21,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:21,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:17:21,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014531324] [2022-07-21 09:17:21,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:21,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:21,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:17:21,286 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:21,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1411 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:21,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:21,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:21,435 INFO L129 PetriNetUnfolder]: 208/637 cut-off events. [2022-07-21 09:17:21,435 INFO L130 PetriNetUnfolder]: For 4280/4291 co-relation queries the response was YES. [2022-07-21 09:17:21,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 637 events. 208/637 cut-off events. For 4280/4291 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3705 event pairs, 47 based on Foata normal form. 8/637 useless extension candidates. Maximal degree in co-relation 2434. Up to 155 conditions per place. [2022-07-21 09:17:21,441 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 102 selfloop transitions, 30 changer transitions 5/186 dead transitions. [2022-07-21 09:17:21,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 186 transitions, 1898 flow [2022-07-21 09:17:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:17:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:17:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2022-07-21 09:17:21,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2022-07-21 09:17:21,442 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2022-07-21 09:17:21,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2022-07-21 09:17:21,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:21,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2022-07-21 09:17:21,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,445 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,445 INFO L186 Difference]: Start difference. First operand has 149 places, 156 transitions, 1411 flow. Second operand 7 states and 486 transitions. [2022-07-21 09:17:21,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 186 transitions, 1898 flow [2022-07-21 09:17:21,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 186 transitions, 1854 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-21 09:17:21,465 INFO L242 Difference]: Finished difference. Result has 153 places, 155 transitions, 1421 flow [2022-07-21 09:17:21,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1421, PETRI_PLACES=153, PETRI_TRANSITIONS=155} [2022-07-21 09:17:21,466 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 76 predicate places. [2022-07-21 09:17:21,466 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 155 transitions, 1421 flow [2022-07-21 09:17:21,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,467 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:21,467 INFO L200 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, 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] [2022-07-21 09:17:21,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 09:17:21,467 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash -599915105, now seen corresponding path program 2 times [2022-07-21 09:17:21,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:21,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154186399] [2022-07-21 09:17:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:21,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:21,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154186399] [2022-07-21 09:17:21,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154186399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:21,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:21,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:17:21,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662008181] [2022-07-21 09:17:21,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:21,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:21,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:17:21,492 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:21,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 155 transitions, 1421 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:21,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:21,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:21,639 INFO L129 PetriNetUnfolder]: 228/704 cut-off events. [2022-07-21 09:17:21,639 INFO L130 PetriNetUnfolder]: For 5033/5043 co-relation queries the response was YES. [2022-07-21 09:17:21,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2980 conditions, 704 events. 228/704 cut-off events. For 5033/5043 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4219 event pairs, 54 based on Foata normal form. 11/708 useless extension candidates. Maximal degree in co-relation 2641. Up to 172 conditions per place. [2022-07-21 09:17:21,646 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 45 changer transitions 2/224 dead transitions. [2022-07-21 09:17:21,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 224 transitions, 2406 flow [2022-07-21 09:17:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:17:21,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:17:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2022-07-21 09:17:21,647 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8132183908045977 [2022-07-21 09:17:21,647 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2022-07-21 09:17:21,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2022-07-21 09:17:21,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:21,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2022-07-21 09:17:21,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,649 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,649 INFO L186 Difference]: Start difference. First operand has 153 places, 155 transitions, 1421 flow. Second operand 8 states and 566 transitions. [2022-07-21 09:17:21,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 224 transitions, 2406 flow [2022-07-21 09:17:21,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 224 transitions, 2316 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-07-21 09:17:21,669 INFO L242 Difference]: Finished difference. Result has 157 places, 170 transitions, 1698 flow [2022-07-21 09:17:21,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1698, PETRI_PLACES=157, PETRI_TRANSITIONS=170} [2022-07-21 09:17:21,669 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 80 predicate places. [2022-07-21 09:17:21,669 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 170 transitions, 1698 flow [2022-07-21 09:17:21,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:21,670 INFO L200 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, 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] [2022-07-21 09:17:21,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 09:17:21,670 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:21,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1443454513, now seen corresponding path program 3 times [2022-07-21 09:17:21,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:21,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144233983] [2022-07-21 09:17:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:21,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:21,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144233983] [2022-07-21 09:17:21,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144233983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:21,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:21,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:17:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582738721] [2022-07-21 09:17:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:21,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:17:21,700 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:21,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 170 transitions, 1698 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:21,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:21,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:21,865 INFO L129 PetriNetUnfolder]: 261/781 cut-off events. [2022-07-21 09:17:21,865 INFO L130 PetriNetUnfolder]: For 5858/5858 co-relation queries the response was YES. [2022-07-21 09:17:21,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3445 conditions, 781 events. 261/781 cut-off events. For 5858/5858 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4724 event pairs, 38 based on Foata normal form. 9/784 useless extension candidates. Maximal degree in co-relation 3285. Up to 129 conditions per place. [2022-07-21 09:17:21,872 INFO L132 encePairwiseOnDemand]: 77/87 looper letters, 100 selfloop transitions, 98 changer transitions 4/251 dead transitions. [2022-07-21 09:17:21,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 251 transitions, 2992 flow [2022-07-21 09:17:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:17:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:17:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2022-07-21 09:17:21,874 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7879948914431673 [2022-07-21 09:17:21,874 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 617 transitions. [2022-07-21 09:17:21,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 617 transitions. [2022-07-21 09:17:21,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:21,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 617 transitions. [2022-07-21 09:17:21,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 68.55555555555556) internal successors, (617), 9 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,876 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,876 INFO L186 Difference]: Start difference. First operand has 157 places, 170 transitions, 1698 flow. Second operand 9 states and 617 transitions. [2022-07-21 09:17:21,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 251 transitions, 2992 flow [2022-07-21 09:17:21,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 2924 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-21 09:17:21,901 INFO L242 Difference]: Finished difference. Result has 170 places, 212 transitions, 2574 flow [2022-07-21 09:17:21,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2574, PETRI_PLACES=170, PETRI_TRANSITIONS=212} [2022-07-21 09:17:21,901 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2022-07-21 09:17:21,901 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 212 transitions, 2574 flow [2022-07-21 09:17:21,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:21,901 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:21,902 INFO L200 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, 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] [2022-07-21 09:17:21,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 09:17:21,902 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1098800831, now seen corresponding path program 3 times [2022-07-21 09:17:21,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:21,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886161076] [2022-07-21 09:17:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:21,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:21,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886161076] [2022-07-21 09:17:21,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886161076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682357166] [2022-07-21 09:17:21,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:17:21,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:21,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:21,926 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) [2022-07-21 09:17:21,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:17:21,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:17:21,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:21,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:17:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:22,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:22,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682357166] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:22,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:17:22,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-07-21 09:17:22,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131968252] [2022-07-21 09:17:22,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:22,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:22,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:22,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:17:22,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:22,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 212 transitions, 2574 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:22,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:22,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:22,252 INFO L129 PetriNetUnfolder]: 280/916 cut-off events. [2022-07-21 09:17:22,253 INFO L130 PetriNetUnfolder]: For 8432/8444 co-relation queries the response was YES. [2022-07-21 09:17:22,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4124 conditions, 916 events. 280/916 cut-off events. For 8432/8444 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5987 event pairs, 49 based on Foata normal form. 12/917 useless extension candidates. Maximal degree in co-relation 3958. Up to 181 conditions per place. [2022-07-21 09:17:22,261 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 117 selfloop transitions, 99 changer transitions 2/267 dead transitions. [2022-07-21 09:17:22,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 3605 flow [2022-07-21 09:17:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:17:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:17:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 428 transitions. [2022-07-21 09:17:22,262 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8199233716475096 [2022-07-21 09:17:22,262 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 428 transitions. [2022-07-21 09:17:22,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 428 transitions. [2022-07-21 09:17:22,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:22,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 428 transitions. [2022-07-21 09:17:22,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.33333333333333) internal successors, (428), 6 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,264 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,264 INFO L186 Difference]: Start difference. First operand has 170 places, 212 transitions, 2574 flow. Second operand 6 states and 428 transitions. [2022-07-21 09:17:22,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 3605 flow [2022-07-21 09:17:22,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 267 transitions, 3491 flow, removed 45 selfloop flow, removed 3 redundant places. [2022-07-21 09:17:22,299 INFO L242 Difference]: Finished difference. Result has 177 places, 229 transitions, 3140 flow [2022-07-21 09:17:22,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3140, PETRI_PLACES=177, PETRI_TRANSITIONS=229} [2022-07-21 09:17:22,299 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 100 predicate places. [2022-07-21 09:17:22,300 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 229 transitions, 3140 flow [2022-07-21 09:17:22,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,300 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:22,300 INFO L200 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, 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] [2022-07-21 09:17:22,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:22,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 09:17:22,523 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1249889045, now seen corresponding path program 4 times [2022-07-21 09:17:22,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:22,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074037810] [2022-07-21 09:17:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:22,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:22,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074037810] [2022-07-21 09:17:22,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074037810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:22,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:22,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:17:22,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722446812] [2022-07-21 09:17:22,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:22,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:22,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:22,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:22,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:17:22,561 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:22,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 229 transitions, 3140 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:22,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:22,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:22,751 INFO L129 PetriNetUnfolder]: 265/851 cut-off events. [2022-07-21 09:17:22,751 INFO L130 PetriNetUnfolder]: For 9579/9608 co-relation queries the response was YES. [2022-07-21 09:17:22,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4160 conditions, 851 events. 265/851 cut-off events. For 9579/9608 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5350 event pairs, 55 based on Foata normal form. 5/847 useless extension candidates. Maximal degree in co-relation 4067. Up to 224 conditions per place. [2022-07-21 09:17:22,760 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 150 selfloop transitions, 59 changer transitions 5/263 dead transitions. [2022-07-21 09:17:22,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 263 transitions, 3808 flow [2022-07-21 09:17:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:17:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:17:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2022-07-21 09:17:22,761 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-07-21 09:17:22,761 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2022-07-21 09:17:22,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2022-07-21 09:17:22,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:22,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2022-07-21 09:17:22,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,764 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,764 INFO L186 Difference]: Start difference. First operand has 177 places, 229 transitions, 3140 flow. Second operand 8 states and 554 transitions. [2022-07-21 09:17:22,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 263 transitions, 3808 flow [2022-07-21 09:17:22,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 263 transitions, 3727 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-21 09:17:22,817 INFO L242 Difference]: Finished difference. Result has 181 places, 231 transitions, 3280 flow [2022-07-21 09:17:22,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2022-07-21 09:17:22,818 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 104 predicate places. [2022-07-21 09:17:22,818 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 3280 flow [2022-07-21 09:17:22,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,818 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:22,818 INFO L200 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, 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] [2022-07-21 09:17:22,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-21 09:17:22,819 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:22,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:22,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1263025475, now seen corresponding path program 5 times [2022-07-21 09:17:22,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:22,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60411283] [2022-07-21 09:17:22,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:22,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60411283] [2022-07-21 09:17:22,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60411283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:22,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:22,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:17:22,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705205518] [2022-07-21 09:17:22,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:22,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:22,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:22,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:22,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:17:22,843 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:22,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 3280 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:22,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:22,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:22,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:23,041 INFO L129 PetriNetUnfolder]: 246/770 cut-off events. [2022-07-21 09:17:23,041 INFO L130 PetriNetUnfolder]: For 9863/9881 co-relation queries the response was YES. [2022-07-21 09:17:23,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3940 conditions, 770 events. 246/770 cut-off events. For 9863/9881 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4618 event pairs, 48 based on Foata normal form. 8/769 useless extension candidates. Maximal degree in co-relation 3854. Up to 190 conditions per place. [2022-07-21 09:17:23,049 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 118 selfloop transitions, 92 changer transitions 2/261 dead transitions. [2022-07-21 09:17:23,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 261 transitions, 3873 flow [2022-07-21 09:17:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:17:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:17:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2022-07-21 09:17:23,051 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-07-21 09:17:23,051 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2022-07-21 09:17:23,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2022-07-21 09:17:23,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:23,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2022-07-21 09:17:23,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,054 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,054 INFO L186 Difference]: Start difference. First operand has 181 places, 231 transitions, 3280 flow. Second operand 8 states and 568 transitions. [2022-07-21 09:17:23,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 261 transitions, 3873 flow [2022-07-21 09:17:23,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 261 transitions, 3741 flow, removed 16 selfloop flow, removed 10 redundant places. [2022-07-21 09:17:23,092 INFO L242 Difference]: Finished difference. Result has 176 places, 224 transitions, 3209 flow [2022-07-21 09:17:23,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3209, PETRI_PLACES=176, PETRI_TRANSITIONS=224} [2022-07-21 09:17:23,096 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2022-07-21 09:17:23,096 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 224 transitions, 3209 flow [2022-07-21 09:17:23,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,096 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:23,096 INFO L200 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, 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] [2022-07-21 09:17:23,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 09:17:23,097 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1192658001, now seen corresponding path program 4 times [2022-07-21 09:17:23,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:23,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811630279] [2022-07-21 09:17:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:23,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:23,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:23,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811630279] [2022-07-21 09:17:23,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811630279] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:23,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571046026] [2022-07-21 09:17:23,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:17:23,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:23,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:23,124 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) [2022-07-21 09:17:23,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:17:23,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:17:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:23,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:17:23,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:23,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:23,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571046026] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:23,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:17:23,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-07-21 09:17:23,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319492337] [2022-07-21 09:17:23,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:23,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:23,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:23,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:17:23,233 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:23,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 224 transitions, 3209 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:23,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:23,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:23,401 INFO L129 PetriNetUnfolder]: 230/716 cut-off events. [2022-07-21 09:17:23,402 INFO L130 PetriNetUnfolder]: For 9860/9860 co-relation queries the response was YES. [2022-07-21 09:17:23,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3724 conditions, 716 events. 230/716 cut-off events. For 9860/9860 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4115 event pairs, 48 based on Foata normal form. 8/719 useless extension candidates. Maximal degree in co-relation 3508. Up to 229 conditions per place. [2022-07-21 09:17:23,409 INFO L132 encePairwiseOnDemand]: 78/87 looper letters, 132 selfloop transitions, 67 changer transitions 0/248 dead transitions. [2022-07-21 09:17:23,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 248 transitions, 3755 flow [2022-07-21 09:17:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:17:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:17:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2022-07-21 09:17:23,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-07-21 09:17:23,411 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2022-07-21 09:17:23,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2022-07-21 09:17:23,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:23,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2022-07-21 09:17:23,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,413 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,414 INFO L186 Difference]: Start difference. First operand has 176 places, 224 transitions, 3209 flow. Second operand 6 states and 426 transitions. [2022-07-21 09:17:23,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 248 transitions, 3755 flow [2022-07-21 09:17:23,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 248 transitions, 3718 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-21 09:17:23,449 INFO L242 Difference]: Finished difference. Result has 182 places, 222 transitions, 3327 flow [2022-07-21 09:17:23,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3327, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2022-07-21 09:17:23,451 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 105 predicate places. [2022-07-21 09:17:23,451 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 3327 flow [2022-07-21 09:17:23,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,452 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:23,452 INFO L200 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, 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] [2022-07-21 09:17:23,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 09:17:23,667 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash -736852561, now seen corresponding path program 5 times [2022-07-21 09:17:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:23,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153554677] [2022-07-21 09:17:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:23,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:23,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:23,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153554677] [2022-07-21 09:17:23,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153554677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:23,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:23,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:17:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374441243] [2022-07-21 09:17:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:23,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:23,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:17:23,707 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:23,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 3327 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:23,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:23,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:23,861 INFO L129 PetriNetUnfolder]: 225/705 cut-off events. [2022-07-21 09:17:23,862 INFO L130 PetriNetUnfolder]: For 10662/10664 co-relation queries the response was YES. [2022-07-21 09:17:23,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3804 conditions, 705 events. 225/705 cut-off events. For 10662/10664 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4045 event pairs, 60 based on Foata normal form. 3/699 useless extension candidates. Maximal degree in co-relation 3591. Up to 195 conditions per place. [2022-07-21 09:17:23,869 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 151 selfloop transitions, 33 changer transitions 5/238 dead transitions. [2022-07-21 09:17:23,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 238 transitions, 3750 flow [2022-07-21 09:17:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:17:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:17:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-07-21 09:17:23,871 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-07-21 09:17:23,871 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-07-21 09:17:23,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-07-21 09:17:23,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:23,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-07-21 09:17:23,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,873 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,873 INFO L186 Difference]: Start difference. First operand has 182 places, 222 transitions, 3327 flow. Second operand 7 states and 483 transitions. [2022-07-21 09:17:23,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 238 transitions, 3750 flow [2022-07-21 09:17:23,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 238 transitions, 3701 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-07-21 09:17:23,914 INFO L242 Difference]: Finished difference. Result has 188 places, 217 transitions, 3202 flow [2022-07-21 09:17:23,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3202, PETRI_PLACES=188, PETRI_TRANSITIONS=217} [2022-07-21 09:17:23,915 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 111 predicate places. [2022-07-21 09:17:23,915 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 217 transitions, 3202 flow [2022-07-21 09:17:23,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:23,916 INFO L200 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, 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] [2022-07-21 09:17:23,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 09:17:23,917 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1170896073, now seen corresponding path program 6 times [2022-07-21 09:17:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:23,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315797165] [2022-07-21 09:17:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:23,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:23,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:23,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315797165] [2022-07-21 09:17:23,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315797165] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:23,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:23,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:17:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577478902] [2022-07-21 09:17:23,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:23,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:23,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:17:23,944 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:23,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 217 transitions, 3202 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:23,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:23,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:23,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:24,107 INFO L129 PetriNetUnfolder]: 213/644 cut-off events. [2022-07-21 09:17:24,108 INFO L130 PetriNetUnfolder]: For 10179/10181 co-relation queries the response was YES. [2022-07-21 09:17:24,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 644 events. 213/644 cut-off events. For 10179/10181 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3530 event pairs, 52 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 3502. Up to 195 conditions per place. [2022-07-21 09:17:24,115 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 124 selfloop transitions, 49 changer transitions 2/224 dead transitions. [2022-07-21 09:17:24,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 224 transitions, 3472 flow [2022-07-21 09:17:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:17:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:17:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-07-21 09:17:24,117 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2022-07-21 09:17:24,117 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-07-21 09:17:24,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-07-21 09:17:24,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:24,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-07-21 09:17:24,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:24,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:24,120 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:24,120 INFO L186 Difference]: Start difference. First operand has 188 places, 217 transitions, 3202 flow. Second operand 8 states and 550 transitions. [2022-07-21 09:17:24,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 224 transitions, 3472 flow [2022-07-21 09:17:24,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 224 transitions, 3236 flow, removed 8 selfloop flow, removed 9 redundant places. [2022-07-21 09:17:24,155 INFO L242 Difference]: Finished difference. Result has 182 places, 203 transitions, 2861 flow [2022-07-21 09:17:24,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2861, PETRI_PLACES=182, PETRI_TRANSITIONS=203} [2022-07-21 09:17:24,156 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 105 predicate places. [2022-07-21 09:17:24,156 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 2861 flow [2022-07-21 09:17:24,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:24,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:24,156 INFO L200 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, 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] [2022-07-21 09:17:24,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-21 09:17:24,157 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:24,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1496756239, now seen corresponding path program 6 times [2022-07-21 09:17:24,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:24,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437271644] [2022-07-21 09:17:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:24,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:24,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:24,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437271644] [2022-07-21 09:17:24,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437271644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:24,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:24,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:17:24,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867081718] [2022-07-21 09:17:24,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:24,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:17:24,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:24,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:17:24,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:17:24,188 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-21 09:17:24,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 203 transitions, 2861 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:24,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:24,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-21 09:17:24,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:24,323 INFO L129 PetriNetUnfolder]: 196/570 cut-off events. [2022-07-21 09:17:24,323 INFO L130 PetriNetUnfolder]: For 8353/8355 co-relation queries the response was YES. [2022-07-21 09:17:24,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3150 conditions, 570 events. 196/570 cut-off events. For 8353/8355 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2872 event pairs, 39 based on Foata normal form. 3/567 useless extension candidates. Maximal degree in co-relation 3110. Up to 190 conditions per place. [2022-07-21 09:17:24,329 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 109 selfloop transitions, 45 changer transitions 3/206 dead transitions. [2022-07-21 09:17:24,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 206 transitions, 3042 flow [2022-07-21 09:17:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:17:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:17:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2022-07-21 09:17:24,331 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2022-07-21 09:17:24,332 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2022-07-21 09:17:24,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2022-07-21 09:17:24,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:24,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2022-07-21 09:17:24,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:24,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:24,334 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:24,334 INFO L186 Difference]: Start difference. First operand has 182 places, 203 transitions, 2861 flow. Second operand 7 states and 480 transitions. [2022-07-21 09:17:24,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 206 transitions, 3042 flow [2022-07-21 09:17:24,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 206 transitions, 2918 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-21 09:17:24,360 INFO L242 Difference]: Finished difference. Result has 170 places, 189 transitions, 2602 flow [2022-07-21 09:17:24,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2602, PETRI_PLACES=170, PETRI_TRANSITIONS=189} [2022-07-21 09:17:24,361 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2022-07-21 09:17:24,361 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 189 transitions, 2602 flow [2022-07-21 09:17:24,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:24,361 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:24,362 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:17:24,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-21 09:17:24,362 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:24,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:24,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008755, now seen corresponding path program 1 times [2022-07-21 09:17:24,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:24,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110056448] [2022-07-21 09:17:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:24,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:24,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:24,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110056448] [2022-07-21 09:17:24,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110056448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:24,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359732075] [2022-07-21 09:17:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:24,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:24,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:24,529 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) [2022-07-21 09:17:24,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:17:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:24,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:17:24,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:24,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:25,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359732075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:25,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:25,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:17:25,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921368702] [2022-07-21 09:17:25,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:25,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:17:25,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:25,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:17:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:17:25,450 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:17:25,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 189 transitions, 2602 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:25,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:25,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:17:25,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:35,730 INFO L129 PetriNetUnfolder]: 972/2287 cut-off events. [2022-07-21 09:17:35,731 INFO L130 PetriNetUnfolder]: For 31601/31601 co-relation queries the response was YES. [2022-07-21 09:17:35,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12769 conditions, 2287 events. 972/2287 cut-off events. For 31601/31601 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15565 event pairs, 33 based on Foata normal form. 3/2277 useless extension candidates. Maximal degree in co-relation 12733. Up to 363 conditions per place. [2022-07-21 09:17:35,756 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 247 selfloop transitions, 857 changer transitions 17/1160 dead transitions. [2022-07-21 09:17:35,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1160 transitions, 16998 flow [2022-07-21 09:17:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-07-21 09:17:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2022-07-21 09:17:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2022-07-21 09:17:35,770 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2022-07-21 09:17:35,770 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2022-07-21 09:17:35,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2022-07-21 09:17:35,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:35,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2022-07-21 09:17:35,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:35,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:35,815 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:35,815 INFO L186 Difference]: Start difference. First operand has 170 places, 189 transitions, 2602 flow. Second operand 224 states and 11784 transitions. [2022-07-21 09:17:35,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1160 transitions, 16998 flow [2022-07-21 09:17:35,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1160 transitions, 16169 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-21 09:17:35,892 INFO L242 Difference]: Finished difference. Result has 439 places, 991 transitions, 15237 flow [2022-07-21 09:17:35,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=15237, PETRI_PLACES=439, PETRI_TRANSITIONS=991} [2022-07-21 09:17:35,893 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 362 predicate places. [2022-07-21 09:17:35,893 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 991 transitions, 15237 flow [2022-07-21 09:17:35,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:35,893 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:35,893 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:17:35,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:36,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:36,107 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash -950751903, now seen corresponding path program 2 times [2022-07-21 09:17:36,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:36,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408083719] [2022-07-21 09:17:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:36,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:36,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:36,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408083719] [2022-07-21 09:17:36,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408083719] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:36,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079961226] [2022-07-21 09:17:36,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:17:36,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:36,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:36,258 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) [2022-07-21 09:17:36,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:17:36,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:17:36,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:36,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:17:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:36,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:37,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079961226] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:37,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:37,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:17:37,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283243565] [2022-07-21 09:17:37,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:37,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:17:37,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:17:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:17:37,169 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:17:37,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 991 transitions, 15237 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:37,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:37,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:17:37,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:39,881 INFO L129 PetriNetUnfolder]: 1106/2984 cut-off events. [2022-07-21 09:17:39,881 INFO L130 PetriNetUnfolder]: For 129885/129885 co-relation queries the response was YES. [2022-07-21 09:17:39,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23620 conditions, 2984 events. 1106/2984 cut-off events. For 129885/129885 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24213 event pairs, 48 based on Foata normal form. 1/2974 useless extension candidates. Maximal degree in co-relation 23523. Up to 439 conditions per place. [2022-07-21 09:17:39,928 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 360 selfloop transitions, 764 changer transitions 45/1208 dead transitions. [2022-07-21 09:17:39,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1208 transitions, 22147 flow [2022-07-21 09:17:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-21 09:17:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-21 09:17:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2022-07-21 09:17:39,932 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2022-07-21 09:17:39,932 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2022-07-21 09:17:39,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2022-07-21 09:17:39,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:39,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2022-07-21 09:17:39,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:39,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:39,944 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:39,944 INFO L186 Difference]: Start difference. First operand has 439 places, 991 transitions, 15237 flow. Second operand 64 states and 3489 transitions. [2022-07-21 09:17:39,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1208 transitions, 22147 flow [2022-07-21 09:17:40,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1208 transitions, 20684 flow, removed 458 selfloop flow, removed 15 redundant places. [2022-07-21 09:17:40,509 INFO L242 Difference]: Finished difference. Result has 499 places, 1037 transitions, 16667 flow [2022-07-21 09:17:40,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=13989, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=16667, PETRI_PLACES=499, PETRI_TRANSITIONS=1037} [2022-07-21 09:17:40,510 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 422 predicate places. [2022-07-21 09:17:40,510 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1037 transitions, 16667 flow [2022-07-21 09:17:40,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:40,511 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:40,511 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:17:40,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:40,711 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,SelfDestructingSolverStorable33 [2022-07-21 09:17:40,712 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:40,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1414684533, now seen corresponding path program 3 times [2022-07-21 09:17:40,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:40,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74518931] [2022-07-21 09:17:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:40,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:40,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:40,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74518931] [2022-07-21 09:17:40,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74518931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:40,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7148069] [2022-07-21 09:17:40,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:17:40,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:40,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:40,870 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) [2022-07-21 09:17:40,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:17:40,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:17:40,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:17:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:41,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:41,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7148069] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:41,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:41,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:17:41,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430309996] [2022-07-21 09:17:41,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:41,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:17:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:41,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:17:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:17:41,759 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:17:41,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1037 transitions, 16667 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:41,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:41,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:17:41,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:44,365 INFO L129 PetriNetUnfolder]: 1087/2957 cut-off events. [2022-07-21 09:17:44,366 INFO L130 PetriNetUnfolder]: For 149702/149702 co-relation queries the response was YES. [2022-07-21 09:17:44,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24789 conditions, 2957 events. 1087/2957 cut-off events. For 149702/149702 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24079 event pairs, 62 based on Foata normal form. 2/2932 useless extension candidates. Maximal degree in co-relation 24683. Up to 415 conditions per place. [2022-07-21 09:17:44,410 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 339 selfloop transitions, 776 changer transitions 31/1185 dead transitions. [2022-07-21 09:17:44,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 1185 transitions, 22459 flow [2022-07-21 09:17:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-21 09:17:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-21 09:17:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2022-07-21 09:17:44,414 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2022-07-21 09:17:44,414 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2022-07-21 09:17:44,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2022-07-21 09:17:44,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:44,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2022-07-21 09:17:44,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:44,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:44,425 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:44,425 INFO L186 Difference]: Start difference. First operand has 499 places, 1037 transitions, 16667 flow. Second operand 66 states and 3577 transitions. [2022-07-21 09:17:44,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 1185 transitions, 22459 flow [2022-07-21 09:17:45,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1185 transitions, 20689 flow, removed 165 selfloop flow, removed 43 redundant places. [2022-07-21 09:17:45,033 INFO L242 Difference]: Finished difference. Result has 529 places, 1054 transitions, 17180 flow [2022-07-21 09:17:45,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15010, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=17180, PETRI_PLACES=529, PETRI_TRANSITIONS=1054} [2022-07-21 09:17:45,034 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 452 predicate places. [2022-07-21 09:17:45,035 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 1054 transitions, 17180 flow [2022-07-21 09:17:45,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:45,035 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:45,035 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:17:45,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:45,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:45,236 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1843164369, now seen corresponding path program 4 times [2022-07-21 09:17:45,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:45,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721870955] [2022-07-21 09:17:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:45,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:45,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:45,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721870955] [2022-07-21 09:17:45,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721870955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100368486] [2022-07-21 09:17:45,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:17:45,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:45,392 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) [2022-07-21 09:17:45,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:17:45,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:17:45,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:45,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 09:17:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:45,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:46,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100368486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:46,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:46,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-21 09:17:46,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773019438] [2022-07-21 09:17:46,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:46,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:17:46,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:46,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:17:46,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:17:46,121 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:17:46,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 1054 transitions, 17180 flow. Second operand has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:46,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:46,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:17:46,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:47,785 INFO L129 PetriNetUnfolder]: 1083/3028 cut-off events. [2022-07-21 09:17:47,786 INFO L130 PetriNetUnfolder]: For 161827/161827 co-relation queries the response was YES. [2022-07-21 09:17:47,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25511 conditions, 3028 events. 1083/3028 cut-off events. For 161827/161827 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25179 event pairs, 103 based on Foata normal form. 3/3002 useless extension candidates. Maximal degree in co-relation 25397. Up to 461 conditions per place. [2022-07-21 09:17:47,831 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 654 selfloop transitions, 463 changer transitions 19/1175 dead transitions. [2022-07-21 09:17:47,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1175 transitions, 22406 flow [2022-07-21 09:17:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:17:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:17:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2064 transitions. [2022-07-21 09:17:47,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.641192917054986 [2022-07-21 09:17:47,834 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2064 transitions. [2022-07-21 09:17:47,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2064 transitions. [2022-07-21 09:17:47,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:47,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2064 transitions. [2022-07-21 09:17:47,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.78378378378378) internal successors, (2064), 37 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:47,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:47,840 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:47,840 INFO L186 Difference]: Start difference. First operand has 529 places, 1054 transitions, 17180 flow. Second operand 37 states and 2064 transitions. [2022-07-21 09:17:47,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1175 transitions, 22406 flow [2022-07-21 09:17:48,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1175 transitions, 20699 flow, removed 134 selfloop flow, removed 51 redundant places. [2022-07-21 09:17:48,495 INFO L242 Difference]: Finished difference. Result has 511 places, 1069 transitions, 16845 flow [2022-07-21 09:17:48,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15596, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=16845, PETRI_PLACES=511, PETRI_TRANSITIONS=1069} [2022-07-21 09:17:48,496 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 434 predicate places. [2022-07-21 09:17:48,496 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1069 transitions, 16845 flow [2022-07-21 09:17:48,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:48,496 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:48,497 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:17:48,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:48,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:48,698 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:48,698 INFO L85 PathProgramCache]: Analyzing trace with hash -559814149, now seen corresponding path program 5 times [2022-07-21 09:17:48,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:48,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418269311] [2022-07-21 09:17:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:48,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:48,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:48,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418269311] [2022-07-21 09:17:48,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418269311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:48,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270449560] [2022-07-21 09:17:48,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:17:48,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:48,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:48,857 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) [2022-07-21 09:17:48,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:17:48,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:17:48,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:48,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 09:17:48,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:49,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:49,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270449560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:49,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:49,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-21 09:17:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444517243] [2022-07-21 09:17:49,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:49,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:17:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:49,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:17:49,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:17:49,560 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:17:49,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1069 transitions, 16845 flow. Second operand has 33 states, 33 states have (on average 50.78787878787879) internal successors, (1676), 33 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:49,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:49,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:17:49,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:51,371 INFO L129 PetriNetUnfolder]: 1141/3135 cut-off events. [2022-07-21 09:17:51,371 INFO L130 PetriNetUnfolder]: For 158536/158536 co-relation queries the response was YES. [2022-07-21 09:17:51,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26198 conditions, 3135 events. 1141/3135 cut-off events. For 158536/158536 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26342 event pairs, 72 based on Foata normal form. 2/3095 useless extension candidates. Maximal degree in co-relation 26086. Up to 620 conditions per place. [2022-07-21 09:17:51,416 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 316 selfloop transitions, 905 changer transitions 21/1281 dead transitions. [2022-07-21 09:17:51,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1281 transitions, 23466 flow [2022-07-21 09:17:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 09:17:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 09:17:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2440 transitions. [2022-07-21 09:17:51,419 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6232439335887612 [2022-07-21 09:17:51,420 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2440 transitions. [2022-07-21 09:17:51,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2440 transitions. [2022-07-21 09:17:51,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:51,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2440 transitions. [2022-07-21 09:17:51,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 54.22222222222222) internal successors, (2440), 45 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:51,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:51,427 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:51,427 INFO L186 Difference]: Start difference. First operand has 511 places, 1069 transitions, 16845 flow. Second operand 45 states and 2440 transitions. [2022-07-21 09:17:51,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1281 transitions, 23466 flow [2022-07-21 09:17:52,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1281 transitions, 22655 flow, removed 37 selfloop flow, removed 21 redundant places. [2022-07-21 09:17:52,160 INFO L242 Difference]: Finished difference. Result has 550 places, 1182 transitions, 20689 flow [2022-07-21 09:17:52,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16090, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=20689, PETRI_PLACES=550, PETRI_TRANSITIONS=1182} [2022-07-21 09:17:52,160 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 473 predicate places. [2022-07-21 09:17:52,161 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1182 transitions, 20689 flow [2022-07-21 09:17:52,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.78787878787879) internal successors, (1676), 33 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:52,161 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:52,161 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:17:52,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:52,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 09:17:52,362 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash 619738599, now seen corresponding path program 6 times [2022-07-21 09:17:52,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532214136] [2022-07-21 09:17:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:52,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:52,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532214136] [2022-07-21 09:17:52,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532214136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:52,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479169404] [2022-07-21 09:17:52,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:17:52,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:52,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:17:52,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:17:52,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:17:52,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:52,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:17:52,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:52,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:53,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479169404] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:53,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:53,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:17:53,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754004868] [2022-07-21 09:17:53,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:53,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:17:53,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:17:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:17:53,251 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:17:53,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1182 transitions, 20689 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:53,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:53,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:17:53,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:56,194 INFO L129 PetriNetUnfolder]: 1186/3337 cut-off events. [2022-07-21 09:17:56,194 INFO L130 PetriNetUnfolder]: For 183553/183553 co-relation queries the response was YES. [2022-07-21 09:17:56,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29532 conditions, 3337 events. 1186/3337 cut-off events. For 183553/183553 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 28275 event pairs, 62 based on Foata normal form. 1/3311 useless extension candidates. Maximal degree in co-relation 29405. Up to 445 conditions per place. [2022-07-21 09:17:56,243 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 447 selfloop transitions, 854 changer transitions 50/1390 dead transitions. [2022-07-21 09:17:56,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1390 transitions, 29071 flow [2022-07-21 09:17:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 09:17:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-21 09:17:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3349 transitions. [2022-07-21 09:17:56,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6310533257961183 [2022-07-21 09:17:56,246 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3349 transitions. [2022-07-21 09:17:56,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3349 transitions. [2022-07-21 09:17:56,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:56,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3349 transitions. [2022-07-21 09:17:56,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.90163934426229) internal successors, (3349), 61 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:56,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:56,255 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:56,256 INFO L186 Difference]: Start difference. First operand has 550 places, 1182 transitions, 20689 flow. Second operand 61 states and 3349 transitions. [2022-07-21 09:17:56,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1390 transitions, 29071 flow [2022-07-21 09:17:57,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1390 transitions, 28528 flow, removed 176 selfloop flow, removed 15 redundant places. [2022-07-21 09:17:57,269 INFO L242 Difference]: Finished difference. Result has 609 places, 1216 transitions, 23245 flow [2022-07-21 09:17:57,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=20364, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=23245, PETRI_PLACES=609, PETRI_TRANSITIONS=1216} [2022-07-21 09:17:57,271 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 532 predicate places. [2022-07-21 09:17:57,271 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1216 transitions, 23245 flow [2022-07-21 09:17:57,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:57,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:57,272 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:17:57,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:57,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 09:17:57,502 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:57,502 INFO L85 PathProgramCache]: Analyzing trace with hash 733196829, now seen corresponding path program 7 times [2022-07-21 09:17:57,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:57,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148123359] [2022-07-21 09:17:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:57,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:57,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:57,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148123359] [2022-07-21 09:17:57,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148123359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:57,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202168968] [2022-07-21 09:17:57,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:17:57,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:57,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:57,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:17:57,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:17:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:17:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:58,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:58,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202168968] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:58,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:58,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:17:58,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106102149] [2022-07-21 09:17:58,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:58,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:17:58,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:58,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:17:58,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:17:58,479 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:17:58,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1216 transitions, 23245 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:58,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:58,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:17:58,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:02,654 INFO L129 PetriNetUnfolder]: 1221/3437 cut-off events. [2022-07-21 09:18:02,654 INFO L130 PetriNetUnfolder]: For 195893/195893 co-relation queries the response was YES. [2022-07-21 09:18:02,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31895 conditions, 3437 events. 1221/3437 cut-off events. For 195893/195893 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 29677 event pairs, 96 based on Foata normal form. 3/3392 useless extension candidates. Maximal degree in co-relation 31753. Up to 736 conditions per place. [2022-07-21 09:18:02,711 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 354 selfloop transitions, 958 changer transitions 27/1378 dead transitions. [2022-07-21 09:18:02,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 1378 transitions, 30151 flow [2022-07-21 09:18:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-21 09:18:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-21 09:18:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5100 transitions. [2022-07-21 09:18:02,717 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.617059891107078 [2022-07-21 09:18:02,717 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5100 transitions. [2022-07-21 09:18:02,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5100 transitions. [2022-07-21 09:18:02,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:02,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5100 transitions. [2022-07-21 09:18:02,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 53.68421052631579) internal successors, (5100), 95 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:02,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 87.0) internal successors, (8352), 96 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:02,732 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 87.0) internal successors, (8352), 96 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:02,732 INFO L186 Difference]: Start difference. First operand has 609 places, 1216 transitions, 23245 flow. Second operand 95 states and 5100 transitions. [2022-07-21 09:18:02,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 1378 transitions, 30151 flow [2022-07-21 09:18:03,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1378 transitions, 29144 flow, removed 70 selfloop flow, removed 36 redundant places. [2022-07-21 09:18:03,820 INFO L242 Difference]: Finished difference. Result has 666 places, 1253 transitions, 25416 flow [2022-07-21 09:18:03,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=22414, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=923, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=25416, PETRI_PLACES=666, PETRI_TRANSITIONS=1253} [2022-07-21 09:18:03,822 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 589 predicate places. [2022-07-21 09:18:03,822 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 1253 transitions, 25416 flow [2022-07-21 09:18:03,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:03,823 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:03,823 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:18:03,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:04,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 09:18:04,025 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:04,025 INFO L85 PathProgramCache]: Analyzing trace with hash 65432667, now seen corresponding path program 8 times [2022-07-21 09:18:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:04,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051152140] [2022-07-21 09:18:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:04,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:04,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051152140] [2022-07-21 09:18:04,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051152140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904102650] [2022-07-21 09:18:04,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:18:04,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:04,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:04,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:18:04,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:18:04,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:04,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:18:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:04,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:04,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904102650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:04,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:04,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:18:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781464469] [2022-07-21 09:18:04,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:04,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:18:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:18:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:18:04,823 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:18:04,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 1253 transitions, 25416 flow. Second operand has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:04,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:04,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:18:04,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:07,795 INFO L129 PetriNetUnfolder]: 1364/3834 cut-off events. [2022-07-21 09:18:07,795 INFO L130 PetriNetUnfolder]: For 217236/217236 co-relation queries the response was YES. [2022-07-21 09:18:07,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36359 conditions, 3834 events. 1364/3834 cut-off events. For 217236/217236 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33644 event pairs, 84 based on Foata normal form. 4/3792 useless extension candidates. Maximal degree in co-relation 36207. Up to 663 conditions per place. [2022-07-21 09:18:07,869 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 292 selfloop transitions, 1283 changer transitions 19/1633 dead transitions. [2022-07-21 09:18:07,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1633 transitions, 36148 flow [2022-07-21 09:18:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-21 09:18:07,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-21 09:18:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3187 transitions. [2022-07-21 09:18:07,872 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6105363984674329 [2022-07-21 09:18:07,873 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3187 transitions. [2022-07-21 09:18:07,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3187 transitions. [2022-07-21 09:18:07,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:07,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3187 transitions. [2022-07-21 09:18:07,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 53.11666666666667) internal successors, (3187), 60 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:07,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:07,882 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:07,882 INFO L186 Difference]: Start difference. First operand has 666 places, 1253 transitions, 25416 flow. Second operand 60 states and 3187 transitions. [2022-07-21 09:18:07,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1633 transitions, 36148 flow [2022-07-21 09:18:09,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1633 transitions, 34246 flow, removed 44 selfloop flow, removed 72 redundant places. [2022-07-21 09:18:09,095 INFO L242 Difference]: Finished difference. Result has 672 places, 1557 transitions, 33902 flow [2022-07-21 09:18:09,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23931, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=33902, PETRI_PLACES=672, PETRI_TRANSITIONS=1557} [2022-07-21 09:18:09,096 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 595 predicate places. [2022-07-21 09:18:09,097 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1557 transitions, 33902 flow [2022-07-21 09:18:09,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:09,097 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:09,097 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:18:09,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:09,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-21 09:18:09,311 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1800442661, now seen corresponding path program 9 times [2022-07-21 09:18:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:09,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662671436] [2022-07-21 09:18:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:09,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:09,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:09,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662671436] [2022-07-21 09:18:09,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662671436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:09,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849761830] [2022-07-21 09:18:09,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:18:09,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:09,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:09,453 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:09,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:18:09,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:18:09,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:09,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:18:09,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:09,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:10,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849761830] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:10,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:10,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:18:10,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896556191] [2022-07-21 09:18:10,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:10,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:18:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:10,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:18:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:18:10,152 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:18:10,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1557 transitions, 33902 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:10,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:10,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:18:10,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:16,955 INFO L129 PetriNetUnfolder]: 1393/3839 cut-off events. [2022-07-21 09:18:16,955 INFO L130 PetriNetUnfolder]: For 271221/271221 co-relation queries the response was YES. [2022-07-21 09:18:17,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40393 conditions, 3839 events. 1393/3839 cut-off events. For 271221/271221 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 33713 event pairs, 106 based on Foata normal form. 3/3787 useless extension candidates. Maximal degree in co-relation 40225. Up to 924 conditions per place. [2022-07-21 09:18:17,035 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 382 selfloop transitions, 1278 changer transitions 28/1727 dead transitions. [2022-07-21 09:18:17,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 1727 transitions, 42932 flow [2022-07-21 09:18:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-07-21 09:18:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-07-21 09:18:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7704 transitions. [2022-07-21 09:18:17,092 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6065186584789797 [2022-07-21 09:18:17,092 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7704 transitions. [2022-07-21 09:18:17,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7704 transitions. [2022-07-21 09:18:17,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:17,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7704 transitions. [2022-07-21 09:18:17,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 52.76712328767123) internal successors, (7704), 146 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:17,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:17,111 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:17,111 INFO L186 Difference]: Start difference. First operand has 672 places, 1557 transitions, 33902 flow. Second operand 146 states and 7704 transitions. [2022-07-21 09:18:17,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 1727 transitions, 42932 flow [2022-07-21 09:18:18,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 1727 transitions, 41156 flow, removed 779 selfloop flow, removed 19 redundant places. [2022-07-21 09:18:18,957 INFO L242 Difference]: Finished difference. Result has 813 places, 1575 transitions, 36645 flow [2022-07-21 09:18:18,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=33228, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=36645, PETRI_PLACES=813, PETRI_TRANSITIONS=1575} [2022-07-21 09:18:18,958 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 736 predicate places. [2022-07-21 09:18:18,958 INFO L495 AbstractCegarLoop]: Abstraction has has 813 places, 1575 transitions, 36645 flow [2022-07-21 09:18:18,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:18,959 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:18,959 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:18:18,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:19,182 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash 959815931, now seen corresponding path program 10 times [2022-07-21 09:18:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:19,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242797197] [2022-07-21 09:18:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:19,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242797197] [2022-07-21 09:18:19,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242797197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690710387] [2022-07-21 09:18:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:18:19,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:19,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:19,344 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:19,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:18:19,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:18:19,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 09:18:19,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:19,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:20,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690710387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:20,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:20,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-21 09:18:20,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805420820] [2022-07-21 09:18:20,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:20,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:18:20,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:18:20,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:18:20,009 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:18:20,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 813 places, 1575 transitions, 36645 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:20,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:20,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:18:20,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:24,728 INFO L129 PetriNetUnfolder]: 1473/4010 cut-off events. [2022-07-21 09:18:24,728 INFO L130 PetriNetUnfolder]: For 246913/246913 co-relation queries the response was YES. [2022-07-21 09:18:24,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41945 conditions, 4010 events. 1473/4010 cut-off events. For 246913/246913 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 35474 event pairs, 194 based on Foata normal form. 2/3945 useless extension candidates. Maximal degree in co-relation 41764. Up to 1060 conditions per place. [2022-07-21 09:18:24,801 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 775 selfloop transitions, 1007 changer transitions 13/1834 dead transitions. [2022-07-21 09:18:24,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 903 places, 1834 transitions, 46444 flow [2022-07-21 09:18:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-21 09:18:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-07-21 09:18:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5376 transitions. [2022-07-21 09:18:24,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6118129054284739 [2022-07-21 09:18:24,807 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5376 transitions. [2022-07-21 09:18:24,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5376 transitions. [2022-07-21 09:18:24,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:24,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5376 transitions. [2022-07-21 09:18:24,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 53.227722772277225) internal successors, (5376), 101 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:24,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:24,820 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:24,821 INFO L186 Difference]: Start difference. First operand has 813 places, 1575 transitions, 36645 flow. Second operand 101 states and 5376 transitions. [2022-07-21 09:18:24,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 903 places, 1834 transitions, 46444 flow [2022-07-21 09:18:26,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1834 transitions, 42870 flow, removed 540 selfloop flow, removed 133 redundant places. [2022-07-21 09:18:26,553 INFO L242 Difference]: Finished difference. Result has 788 places, 1713 transitions, 39246 flow [2022-07-21 09:18:26,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=34281, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=39246, PETRI_PLACES=788, PETRI_TRANSITIONS=1713} [2022-07-21 09:18:26,554 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 711 predicate places. [2022-07-21 09:18:26,554 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 1713 transitions, 39246 flow [2022-07-21 09:18:26,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:26,555 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:26,555 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:18:26,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:26,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-21 09:18:26,755 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:26,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash -612854579, now seen corresponding path program 11 times [2022-07-21 09:18:26,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:26,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331598768] [2022-07-21 09:18:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:26,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:26,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:26,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331598768] [2022-07-21 09:18:26,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331598768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:26,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919746597] [2022-07-21 09:18:26,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:18:26,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:26,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:26,924 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:26,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:18:26,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:18:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:18:26,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:27,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:27,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919746597] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:27,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:27,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:18:27,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118805217] [2022-07-21 09:18:27,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:27,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:18:27,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:27,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:18:27,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:18:27,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:18:27,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 1713 transitions, 39246 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:27,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:27,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:18:27,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:34,824 INFO L129 PetriNetUnfolder]: 1471/4032 cut-off events. [2022-07-21 09:18:34,824 INFO L130 PetriNetUnfolder]: For 125121/125121 co-relation queries the response was YES. [2022-07-21 09:18:34,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37149 conditions, 4032 events. 1471/4032 cut-off events. For 125121/125121 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 35697 event pairs, 118 based on Foata normal form. 2/3977 useless extension candidates. Maximal degree in co-relation 36963. Up to 835 conditions per place. [2022-07-21 09:18:34,898 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 439 selfloop transitions, 1376 changer transitions 40/1894 dead transitions. [2022-07-21 09:18:34,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 1894 transitions, 46559 flow [2022-07-21 09:18:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-07-21 09:18:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2022-07-21 09:18:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 7892 transitions. [2022-07-21 09:18:34,903 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.608809689115174 [2022-07-21 09:18:34,903 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 7892 transitions. [2022-07-21 09:18:34,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 7892 transitions. [2022-07-21 09:18:34,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:34,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 7892 transitions. [2022-07-21 09:18:34,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 150 states, 149 states have (on average 52.966442953020135) internal successors, (7892), 149 states have internal predecessors, (7892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:34,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 150 states, 150 states have (on average 87.0) internal successors, (13050), 150 states have internal predecessors, (13050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:34,922 INFO L81 ComplementDD]: Finished complementDD. Result has 150 states, 150 states have (on average 87.0) internal successors, (13050), 150 states have internal predecessors, (13050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:34,923 INFO L186 Difference]: Start difference. First operand has 788 places, 1713 transitions, 39246 flow. Second operand 149 states and 7892 transitions. [2022-07-21 09:18:34,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 1894 transitions, 46559 flow [2022-07-21 09:18:36,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 905 places, 1894 transitions, 45317 flow, removed 56 selfloop flow, removed 28 redundant places. [2022-07-21 09:18:36,401 INFO L242 Difference]: Finished difference. Result has 916 places, 1709 transitions, 40902 flow [2022-07-21 09:18:36,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38038, PETRI_DIFFERENCE_MINUEND_PLACES=757, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=149, PETRI_FLOW=40902, PETRI_PLACES=916, PETRI_TRANSITIONS=1709} [2022-07-21 09:18:36,403 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 839 predicate places. [2022-07-21 09:18:36,403 INFO L495 AbstractCegarLoop]: Abstraction has has 916 places, 1709 transitions, 40902 flow [2022-07-21 09:18:36,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:36,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:36,404 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:18:36,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-21 09:18:36,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:36,614 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:36,615 INFO L85 PathProgramCache]: Analyzing trace with hash -446656927, now seen corresponding path program 12 times [2022-07-21 09:18:36,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:36,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022535272] [2022-07-21 09:18:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:36,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:36,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022535272] [2022-07-21 09:18:36,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022535272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704855114] [2022-07-21 09:18:36,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:18:36,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:36,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:36,767 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:36,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:18:36,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:18:36,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:36,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 09:18:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:37,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:37,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704855114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:37,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:37,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-21 09:18:37,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241966770] [2022-07-21 09:18:37,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:37,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:18:37,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:18:37,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:18:37,349 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:18:37,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 916 places, 1709 transitions, 40902 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:37,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:37,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:18:37,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:40,518 INFO L129 PetriNetUnfolder]: 1530/4318 cut-off events. [2022-07-21 09:18:40,518 INFO L130 PetriNetUnfolder]: For 140902/140902 co-relation queries the response was YES. [2022-07-21 09:18:40,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40138 conditions, 4318 events. 1530/4318 cut-off events. For 140902/140902 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 39572 event pairs, 90 based on Foata normal form. 3/4284 useless extension candidates. Maximal degree in co-relation 39944. Up to 782 conditions per place. [2022-07-21 09:18:40,603 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 436 selfloop transitions, 1282 changer transitions 73/1830 dead transitions. [2022-07-21 09:18:40,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 1830 transitions, 47280 flow [2022-07-21 09:18:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 09:18:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-21 09:18:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2906 transitions. [2022-07-21 09:18:40,605 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6185610898254577 [2022-07-21 09:18:40,605 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2906 transitions. [2022-07-21 09:18:40,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2906 transitions. [2022-07-21 09:18:40,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:40,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2906 transitions. [2022-07-21 09:18:40,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.81481481481482) internal successors, (2906), 54 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:40,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:40,610 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:40,610 INFO L186 Difference]: Start difference. First operand has 916 places, 1709 transitions, 40902 flow. Second operand 54 states and 2906 transitions. [2022-07-21 09:18:40,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 1830 transitions, 47280 flow [2022-07-21 09:18:42,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 1830 transitions, 45375 flow, removed 35 selfloop flow, removed 129 redundant places. [2022-07-21 09:18:42,215 INFO L242 Difference]: Finished difference. Result has 832 places, 1694 transitions, 41282 flow [2022-07-21 09:18:42,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=39018, PETRI_DIFFERENCE_MINUEND_PLACES=772, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=41282, PETRI_PLACES=832, PETRI_TRANSITIONS=1694} [2022-07-21 09:18:42,217 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 755 predicate places. [2022-07-21 09:18:42,217 INFO L495 AbstractCegarLoop]: Abstraction has has 832 places, 1694 transitions, 41282 flow [2022-07-21 09:18:42,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:42,217 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:42,217 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:18:42,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:42,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:42,418 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash 8615431, now seen corresponding path program 13 times [2022-07-21 09:18:42,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:42,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808946880] [2022-07-21 09:18:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:42,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:42,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:42,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808946880] [2022-07-21 09:18:42,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808946880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866081033] [2022-07-21 09:18:42,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:18:42,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:42,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:42,586 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:42,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:18:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:18:42,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:42,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:43,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866081033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:43,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:43,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:18:43,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034141423] [2022-07-21 09:18:43,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:43,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:18:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:18:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:18:43,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:18:43,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 1694 transitions, 41282 flow. Second operand has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:43,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:43,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:18:43,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:52,599 INFO L129 PetriNetUnfolder]: 1412/3887 cut-off events. [2022-07-21 09:18:52,600 INFO L130 PetriNetUnfolder]: For 134181/134181 co-relation queries the response was YES. [2022-07-21 09:18:52,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37600 conditions, 3887 events. 1412/3887 cut-off events. For 134181/134181 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 34014 event pairs, 97 based on Foata normal form. 4/3856 useless extension candidates. Maximal degree in co-relation 37409. Up to 692 conditions per place. [2022-07-21 09:18:52,675 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 428 selfloop transitions, 1367 changer transitions 35/1869 dead transitions. [2022-07-21 09:18:52,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1010 places, 1869 transitions, 48317 flow [2022-07-21 09:18:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-07-21 09:18:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2022-07-21 09:18:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 10038 transitions. [2022-07-21 09:18:52,680 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6072595281306715 [2022-07-21 09:18:52,680 INFO L72 ComplementDD]: Start complementDD. Operand 190 states and 10038 transitions. [2022-07-21 09:18:52,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 190 states and 10038 transitions. [2022-07-21 09:18:52,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:52,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 190 states and 10038 transitions. [2022-07-21 09:18:52,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 191 states, 190 states have (on average 52.83157894736842) internal successors, (10038), 190 states have internal predecessors, (10038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:52,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 191 states, 191 states have (on average 87.0) internal successors, (16617), 191 states have internal predecessors, (16617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:52,697 INFO L81 ComplementDD]: Finished complementDD. Result has 191 states, 191 states have (on average 87.0) internal successors, (16617), 191 states have internal predecessors, (16617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:52,697 INFO L186 Difference]: Start difference. First operand has 832 places, 1694 transitions, 41282 flow. Second operand 190 states and 10038 transitions. [2022-07-21 09:18:52,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1010 places, 1869 transitions, 48317 flow [2022-07-21 09:18:53,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 958 places, 1869 transitions, 45397 flow, removed 80 selfloop flow, removed 52 redundant places. [2022-07-21 09:18:54,018 INFO L242 Difference]: Finished difference. Result has 966 places, 1677 transitions, 40978 flow [2022-07-21 09:18:54,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38489, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=190, PETRI_FLOW=40978, PETRI_PLACES=966, PETRI_TRANSITIONS=1677} [2022-07-21 09:18:54,019 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 889 predicate places. [2022-07-21 09:18:54,019 INFO L495 AbstractCegarLoop]: Abstraction has has 966 places, 1677 transitions, 40978 flow [2022-07-21 09:18:54,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:54,020 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:54,020 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:18:54,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-21 09:18:54,220 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash 739671021, now seen corresponding path program 14 times [2022-07-21 09:18:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:54,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247423792] [2022-07-21 09:18:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:54,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:54,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247423792] [2022-07-21 09:18:54,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247423792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:54,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274290717] [2022-07-21 09:18:54,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:18:54,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:54,396 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:18:54,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:18:54,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:18:54,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:18:54,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:54,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:18:55,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274290717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:55,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:55,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:18:55,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465936280] [2022-07-21 09:18:55,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:55,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:18:55,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:18:55,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:18:55,312 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:18:55,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 966 places, 1677 transitions, 40978 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:55,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:55,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:18:55,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:58,299 INFO L129 PetriNetUnfolder]: 1404/3801 cut-off events. [2022-07-21 09:18:58,300 INFO L130 PetriNetUnfolder]: For 127173/127173 co-relation queries the response was YES. [2022-07-21 09:18:58,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37115 conditions, 3801 events. 1404/3801 cut-off events. For 127173/127173 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32809 event pairs, 82 based on Foata normal form. 1/3769 useless extension candidates. Maximal degree in co-relation 36928. Up to 722 conditions per place. [2022-07-21 09:18:58,376 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 286 selfloop transitions, 1381 changer transitions 21/1727 dead transitions. [2022-07-21 09:18:58,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 1727 transitions, 45280 flow [2022-07-21 09:18:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-21 09:18:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-21 09:18:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3074 transitions. [2022-07-21 09:18:58,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2022-07-21 09:18:58,379 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3074 transitions. [2022-07-21 09:18:58,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3074 transitions. [2022-07-21 09:18:58,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:58,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3074 transitions. [2022-07-21 09:18:58,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.0) internal successors, (3074), 58 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:58,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:58,384 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:58,384 INFO L186 Difference]: Start difference. First operand has 966 places, 1677 transitions, 40978 flow. Second operand 58 states and 3074 transitions. [2022-07-21 09:18:58,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 1727 transitions, 45280 flow [2022-07-21 09:18:59,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 1727 transitions, 42946 flow, removed 19 selfloop flow, removed 168 redundant places. [2022-07-21 09:18:59,673 INFO L242 Difference]: Finished difference. Result has 840 places, 1661 transitions, 41061 flow [2022-07-21 09:18:59,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38664, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=41061, PETRI_PLACES=840, PETRI_TRANSITIONS=1661} [2022-07-21 09:18:59,675 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 763 predicate places. [2022-07-21 09:18:59,675 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 1661 transitions, 41061 flow [2022-07-21 09:18:59,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:18:59,676 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:59,676 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:18:59,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 09:18:59,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:59,891 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:59,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1010313819, now seen corresponding path program 15 times [2022-07-21 09:18:59,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:59,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516736505] [2022-07-21 09:18:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:59,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:00,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:00,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516736505] [2022-07-21 09:19:00,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516736505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:00,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178253080] [2022-07-21 09:19:00,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:19:00,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:00,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:00,056 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:19:00,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:19:00,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:19:00,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:00,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:19:00,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:00,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:00,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178253080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:00,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:00,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:19:00,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220559524] [2022-07-21 09:19:00,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:00,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:19:00,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:00,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:19:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:19:00,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:19:00,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 1661 transitions, 41061 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:00,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:00,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:19:00,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:04,232 INFO L129 PetriNetUnfolder]: 1400/3793 cut-off events. [2022-07-21 09:19:04,232 INFO L130 PetriNetUnfolder]: For 128224/128224 co-relation queries the response was YES. [2022-07-21 09:19:04,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37695 conditions, 3793 events. 1400/3793 cut-off events. For 128224/128224 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32733 event pairs, 78 based on Foata normal form. 1/3764 useless extension candidates. Maximal degree in co-relation 37512. Up to 556 conditions per place. [2022-07-21 09:19:04,296 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 282 selfloop transitions, 1398 changer transitions 9/1728 dead transitions. [2022-07-21 09:19:04,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 893 places, 1728 transitions, 45650 flow [2022-07-21 09:19:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-21 09:19:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-21 09:19:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3177 transitions. [2022-07-21 09:19:04,298 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6086206896551725 [2022-07-21 09:19:04,298 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3177 transitions. [2022-07-21 09:19:04,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3177 transitions. [2022-07-21 09:19:04,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:04,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3177 transitions. [2022-07-21 09:19:04,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.95) internal successors, (3177), 60 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:04,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:04,303 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:04,303 INFO L186 Difference]: Start difference. First operand has 840 places, 1661 transitions, 41061 flow. Second operand 60 states and 3177 transitions. [2022-07-21 09:19:04,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 893 places, 1728 transitions, 45650 flow [2022-07-21 09:19:05,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 1728 transitions, 43367 flow, removed 16 selfloop flow, removed 47 redundant places. [2022-07-21 09:19:05,574 INFO L242 Difference]: Finished difference. Result has 849 places, 1665 transitions, 41736 flow [2022-07-21 09:19:05,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38814, PETRI_DIFFERENCE_MINUEND_PLACES=787, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=41736, PETRI_PLACES=849, PETRI_TRANSITIONS=1665} [2022-07-21 09:19:05,575 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 772 predicate places. [2022-07-21 09:19:05,575 INFO L495 AbstractCegarLoop]: Abstraction has has 849 places, 1665 transitions, 41736 flow [2022-07-21 09:19:05,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:05,575 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:05,576 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:19:05,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-21 09:19:05,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:05,776 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1051537019, now seen corresponding path program 16 times [2022-07-21 09:19:05,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322141723] [2022-07-21 09:19:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:05,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:05,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:05,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322141723] [2022-07-21 09:19:05,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322141723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:05,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626639750] [2022-07-21 09:19:05,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:19:05,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:05,936 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:19:05,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:19:06,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:19:06,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:06,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 09:19:06,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:06,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:06,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626639750] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:06,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:06,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-21 09:19:06,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370846336] [2022-07-21 09:19:06,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:06,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:19:06,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:06,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:19:06,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:19:06,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:19:06,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 1665 transitions, 41736 flow. Second operand has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:06,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:06,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:19:06,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:11,590 INFO L129 PetriNetUnfolder]: 1541/4021 cut-off events. [2022-07-21 09:19:11,591 INFO L130 PetriNetUnfolder]: For 133576/133576 co-relation queries the response was YES. [2022-07-21 09:19:11,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41150 conditions, 4021 events. 1541/4021 cut-off events. For 133576/133576 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 34362 event pairs, 171 based on Foata normal form. 3/3974 useless extension candidates. Maximal degree in co-relation 40967. Up to 858 conditions per place. [2022-07-21 09:19:11,672 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 781 selfloop transitions, 1171 changer transitions 26/2017 dead transitions. [2022-07-21 09:19:11,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 960 places, 2017 transitions, 53397 flow [2022-07-21 09:19:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-21 09:19:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-07-21 09:19:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 6154 transitions. [2022-07-21 09:19:11,676 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.609789932619897 [2022-07-21 09:19:11,676 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 6154 transitions. [2022-07-21 09:19:11,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 6154 transitions. [2022-07-21 09:19:11,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:11,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 6154 transitions. [2022-07-21 09:19:11,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 53.05172413793103) internal successors, (6154), 116 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 87.0) internal successors, (10179), 117 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,689 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 87.0) internal successors, (10179), 117 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:11,689 INFO L186 Difference]: Start difference. First operand has 849 places, 1665 transitions, 41736 flow. Second operand 116 states and 6154 transitions. [2022-07-21 09:19:11,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 960 places, 2017 transitions, 53397 flow [2022-07-21 09:19:13,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 2017 transitions, 50540 flow, removed 5 selfloop flow, removed 51 redundant places. [2022-07-21 09:19:13,146 INFO L242 Difference]: Finished difference. Result has 930 places, 1882 transitions, 46945 flow [2022-07-21 09:19:13,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=39359, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=957, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=46945, PETRI_PLACES=930, PETRI_TRANSITIONS=1882} [2022-07-21 09:19:13,147 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 853 predicate places. [2022-07-21 09:19:13,147 INFO L495 AbstractCegarLoop]: Abstraction has has 930 places, 1882 transitions, 46945 flow [2022-07-21 09:19:13,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:13,148 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:13,148 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:19:13,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:13,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:13,348 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1509753261, now seen corresponding path program 17 times [2022-07-21 09:19:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:13,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507002948] [2022-07-21 09:19:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507002948] [2022-07-21 09:19:13,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507002948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542035663] [2022-07-21 09:19:13,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:19:13,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:13,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:13,480 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:19:13,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 09:19:13,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:19:13,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:13,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 09:19:13,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:13,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:14,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542035663] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:14,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:14,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-21 09:19:14,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345323769] [2022-07-21 09:19:14,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:14,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:19:14,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:14,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:19:14,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:19:14,186 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:19:14,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 930 places, 1882 transitions, 46945 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:14,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:14,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:19:14,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:17,400 INFO L129 PetriNetUnfolder]: 1768/4475 cut-off events. [2022-07-21 09:19:17,401 INFO L130 PetriNetUnfolder]: For 153513/153513 co-relation queries the response was YES. [2022-07-21 09:19:17,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47004 conditions, 4475 events. 1768/4475 cut-off events. For 153513/153513 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 38096 event pairs, 104 based on Foata normal form. 1/4437 useless extension candidates. Maximal degree in co-relation 46803. Up to 896 conditions per place. [2022-07-21 09:19:17,498 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 666 selfloop transitions, 1600 changer transitions 9/2314 dead transitions. [2022-07-21 09:19:17,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 2314 transitions, 61976 flow [2022-07-21 09:19:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 09:19:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-21 09:19:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2351 transitions. [2022-07-21 09:19:17,500 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.614158829676071 [2022-07-21 09:19:17,500 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2351 transitions. [2022-07-21 09:19:17,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2351 transitions. [2022-07-21 09:19:17,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:17,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2351 transitions. [2022-07-21 09:19:17,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 53.43181818181818) internal successors, (2351), 44 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:17,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:17,504 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:17,505 INFO L186 Difference]: Start difference. First operand has 930 places, 1882 transitions, 46945 flow. Second operand 44 states and 2351 transitions. [2022-07-21 09:19:17,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 2314 transitions, 61976 flow [2022-07-21 09:19:19,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 918 places, 2314 transitions, 60528 flow, removed 103 selfloop flow, removed 44 redundant places. [2022-07-21 09:19:19,402 INFO L242 Difference]: Finished difference. Result has 947 places, 2237 transitions, 60282 flow [2022-07-21 09:19:19,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=45792, PETRI_DIFFERENCE_MINUEND_PLACES=875, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=60282, PETRI_PLACES=947, PETRI_TRANSITIONS=2237} [2022-07-21 09:19:19,403 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 870 predicate places. [2022-07-21 09:19:19,403 INFO L495 AbstractCegarLoop]: Abstraction has has 947 places, 2237 transitions, 60282 flow [2022-07-21 09:19:19,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:19,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:19,403 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:19:19,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-21 09:19:19,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-21 09:19:19,604 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2133095729, now seen corresponding path program 18 times [2022-07-21 09:19:19,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:19,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321433065] [2022-07-21 09:19:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:19,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:19,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321433065] [2022-07-21 09:19:19,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321433065] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:19,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206668327] [2022-07-21 09:19:19,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:19:19,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:19,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:19,731 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:19:19,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 09:19:19,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:19:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:19,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 09:19:19,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:20,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:20,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206668327] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:20,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:20,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-21 09:19:20,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989049986] [2022-07-21 09:19:20,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:20,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:19:20,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:19:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:19:20,358 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:19:20,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 947 places, 2237 transitions, 60282 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:20,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:20,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:19:20,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:24,647 INFO L129 PetriNetUnfolder]: 2184/5326 cut-off events. [2022-07-21 09:19:24,647 INFO L130 PetriNetUnfolder]: For 203232/203232 co-relation queries the response was YES. [2022-07-21 09:19:24,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61291 conditions, 5326 events. 2184/5326 cut-off events. For 203232/203232 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 45426 event pairs, 111 based on Foata normal form. 1/5287 useless extension candidates. Maximal degree in co-relation 61073. Up to 1078 conditions per place. [2022-07-21 09:19:24,780 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 963 selfloop transitions, 1938 changer transitions 9/2949 dead transitions. [2022-07-21 09:19:24,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 2949 transitions, 85202 flow [2022-07-21 09:19:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:19:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:19:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1923 transitions. [2022-07-21 09:19:24,782 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6139846743295019 [2022-07-21 09:19:24,782 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1923 transitions. [2022-07-21 09:19:24,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1923 transitions. [2022-07-21 09:19:24,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:24,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1923 transitions. [2022-07-21 09:19:24,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.416666666666664) internal successors, (1923), 36 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:24,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:24,787 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:24,787 INFO L186 Difference]: Start difference. First operand has 947 places, 2237 transitions, 60282 flow. Second operand 36 states and 1923 transitions. [2022-07-21 09:19:24,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 2949 transitions, 85202 flow [2022-07-21 09:19:27,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 965 places, 2949 transitions, 84921 flow, removed 64 selfloop flow, removed 13 redundant places. [2022-07-21 09:19:27,895 INFO L242 Difference]: Finished difference. Result has 986 places, 2860 transitions, 83626 flow [2022-07-21 09:19:27,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=60051, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=83626, PETRI_PLACES=986, PETRI_TRANSITIONS=2860} [2022-07-21 09:19:27,897 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 909 predicate places. [2022-07-21 09:19:27,897 INFO L495 AbstractCegarLoop]: Abstraction has has 986 places, 2860 transitions, 83626 flow [2022-07-21 09:19:27,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:27,897 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:27,897 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:19:27,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:28,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-21 09:19:28,098 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash -796421737, now seen corresponding path program 19 times [2022-07-21 09:19:28,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:28,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449894504] [2022-07-21 09:19:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:28,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:28,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449894504] [2022-07-21 09:19:28,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449894504] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171254906] [2022-07-21 09:19:28,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:19:28,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:28,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:28,264 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:19:28,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 09:19:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:28,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:19:28,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:28,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:29,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171254906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:29,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:29,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:19:29,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096228591] [2022-07-21 09:19:29,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:29,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:19:29,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:29,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:19:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:19:29,015 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:19:29,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 986 places, 2860 transitions, 83626 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:29,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:29,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:19:29,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:36,439 INFO L129 PetriNetUnfolder]: 2415/5809 cut-off events. [2022-07-21 09:19:36,439 INFO L130 PetriNetUnfolder]: For 246812/246812 co-relation queries the response was YES. [2022-07-21 09:19:36,547 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71303 conditions, 5809 events. 2415/5809 cut-off events. For 246812/246812 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 49876 event pairs, 105 based on Foata normal form. 1/5770 useless extension candidates. Maximal degree in co-relation 71068. Up to 1099 conditions per place. [2022-07-21 09:19:36,590 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1064 selfloop transitions, 2268 changer transitions 10/3381 dead transitions. [2022-07-21 09:19:36,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1068 places, 3381 transitions, 104032 flow [2022-07-21 09:19:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-21 09:19:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-21 09:19:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4603 transitions. [2022-07-21 09:19:36,593 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6081384595058792 [2022-07-21 09:19:36,593 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4603 transitions. [2022-07-21 09:19:36,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4603 transitions. [2022-07-21 09:19:36,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:36,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4603 transitions. [2022-07-21 09:19:36,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 52.9080459770115) internal successors, (4603), 87 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:36,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:36,603 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:36,603 INFO L186 Difference]: Start difference. First operand has 986 places, 2860 transitions, 83626 flow. Second operand 87 states and 4603 transitions. [2022-07-21 09:19:36,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1068 places, 3381 transitions, 104032 flow [2022-07-21 09:19:40,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1057 places, 3381 transitions, 103402 flow, removed 103 selfloop flow, removed 11 redundant places. [2022-07-21 09:19:41,046 INFO L242 Difference]: Finished difference. Result has 1083 places, 3267 transitions, 100762 flow [2022-07-21 09:19:41,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=83119, PETRI_DIFFERENCE_MINUEND_PLACES=971, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1889, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=100762, PETRI_PLACES=1083, PETRI_TRANSITIONS=3267} [2022-07-21 09:19:41,048 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1006 predicate places. [2022-07-21 09:19:41,049 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 3267 transitions, 100762 flow [2022-07-21 09:19:41,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:41,049 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:41,049 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:19:41,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 09:19:41,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:41,252 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:41,253 INFO L85 PathProgramCache]: Analyzing trace with hash 418442369, now seen corresponding path program 20 times [2022-07-21 09:19:41,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:41,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617033830] [2022-07-21 09:19:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:41,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:41,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:41,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617033830] [2022-07-21 09:19:41,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617033830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:41,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929121180] [2022-07-21 09:19:41,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:19:41,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:41,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:41,416 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:19:41,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 09:19:41,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:19:41,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:19:41,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:41,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:42,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929121180] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:42,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:42,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:19:42,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158607368] [2022-07-21 09:19:42,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:42,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:19:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:19:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:19:42,273 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:19:42,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1083 places, 3267 transitions, 100762 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:42,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:42,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:19:42,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:19:49,328 INFO L129 PetriNetUnfolder]: 2416/5848 cut-off events. [2022-07-21 09:19:49,328 INFO L130 PetriNetUnfolder]: For 276489/276489 co-relation queries the response was YES. [2022-07-21 09:19:49,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74843 conditions, 5848 events. 2416/5848 cut-off events. For 276489/276489 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 50576 event pairs, 123 based on Foata normal form. 1/5809 useless extension candidates. Maximal degree in co-relation 74588. Up to 1123 conditions per place. [2022-07-21 09:19:49,482 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1343 selfloop transitions, 1970 changer transitions 10/3362 dead transitions. [2022-07-21 09:19:49,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 3362 transitions, 109573 flow [2022-07-21 09:19:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 09:19:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-21 09:19:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2874 transitions. [2022-07-21 09:19:49,485 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.611749680715198 [2022-07-21 09:19:49,485 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2874 transitions. [2022-07-21 09:19:49,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2874 transitions. [2022-07-21 09:19:49,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:19:49,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2874 transitions. [2022-07-21 09:19:49,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.22222222222222) internal successors, (2874), 54 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:49,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:49,492 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:49,493 INFO L186 Difference]: Start difference. First operand has 1083 places, 3267 transitions, 100762 flow. Second operand 54 states and 2874 transitions. [2022-07-21 09:19:49,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 3362 transitions, 109573 flow [2022-07-21 09:19:54,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1111 places, 3362 transitions, 108811 flow, removed 121 selfloop flow, removed 20 redundant places. [2022-07-21 09:19:54,547 INFO L242 Difference]: Finished difference. Result has 1121 places, 3293 transitions, 105473 flow [2022-07-21 09:19:54,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=100023, PETRI_DIFFERENCE_MINUEND_PLACES=1058, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1945, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=105473, PETRI_PLACES=1121, PETRI_TRANSITIONS=3293} [2022-07-21 09:19:54,549 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1044 predicate places. [2022-07-21 09:19:54,549 INFO L495 AbstractCegarLoop]: Abstraction has has 1121 places, 3293 transitions, 105473 flow [2022-07-21 09:19:54,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:54,550 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:19:54,550 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:19:54,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-21 09:19:54,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:54,750 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:19:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:19:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1588638345, now seen corresponding path program 21 times [2022-07-21 09:19:54,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:19:54,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876604966] [2022-07-21 09:19:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:19:54,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:19:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:19:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:54,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:19:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876604966] [2022-07-21 09:19:54,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876604966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:19:54,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337345660] [2022-07-21 09:19:54,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:19:54,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:19:54,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:19:54,897 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:19:54,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 09:19:54,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:19:54,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:19:54,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:19:54,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:19:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:55,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:19:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:19:55,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337345660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:19:55,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:19:55,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 09:19:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266739546] [2022-07-21 09:19:55,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:19:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:19:55,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:19:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:19:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:19:55,568 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:19:55,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1121 places, 3293 transitions, 105473 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:19:55,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:19:55,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:19:55,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:02,787 INFO L129 PetriNetUnfolder]: 2416/5871 cut-off events. [2022-07-21 09:20:02,787 INFO L130 PetriNetUnfolder]: For 306475/306475 co-relation queries the response was YES. [2022-07-21 09:20:02,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77311 conditions, 5871 events. 2416/5871 cut-off events. For 306475/306475 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 50954 event pairs, 118 based on Foata normal form. 1/5832 useless extension candidates. Maximal degree in co-relation 77054. Up to 1133 conditions per place. [2022-07-21 09:20:02,980 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1351 selfloop transitions, 1965 changer transitions 17/3372 dead transitions. [2022-07-21 09:20:02,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1168 places, 3372 transitions, 113868 flow [2022-07-21 09:20:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 09:20:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-21 09:20:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2816 transitions. [2022-07-21 09:20:02,982 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6107135111689438 [2022-07-21 09:20:02,982 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2816 transitions. [2022-07-21 09:20:02,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2816 transitions. [2022-07-21 09:20:02,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:02,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2816 transitions. [2022-07-21 09:20:02,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 53.132075471698116) internal successors, (2816), 53 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:02,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:02,987 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:02,987 INFO L186 Difference]: Start difference. First operand has 1121 places, 3293 transitions, 105473 flow. Second operand 53 states and 2816 transitions. [2022-07-21 09:20:02,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1168 places, 3372 transitions, 113868 flow [2022-07-21 09:20:07,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1142 places, 3372 transitions, 111602 flow, removed 28 selfloop flow, removed 26 redundant places. [2022-07-21 09:20:08,043 INFO L242 Difference]: Finished difference. Result has 1151 places, 3301 transitions, 107867 flow [2022-07-21 09:20:08,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=103216, PETRI_DIFFERENCE_MINUEND_PLACES=1090, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1956, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=107867, PETRI_PLACES=1151, PETRI_TRANSITIONS=3301} [2022-07-21 09:20:08,046 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1074 predicate places. [2022-07-21 09:20:08,046 INFO L495 AbstractCegarLoop]: Abstraction has has 1151 places, 3301 transitions, 107867 flow [2022-07-21 09:20:08,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:08,046 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:08,046 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:20:08,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 09:20:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:08,247 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash -24500895, now seen corresponding path program 22 times [2022-07-21 09:20:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:08,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999928247] [2022-07-21 09:20:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:08,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999928247] [2022-07-21 09:20:08,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999928247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:20:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081791993] [2022-07-21 09:20:08,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:20:08,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:08,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:08,408 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:20:08,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 09:20:08,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:20:08,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:20:08,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 09:20:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:20:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:08,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:20:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:08,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081791993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:20:08,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:20:08,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-07-21 09:20:08,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799560483] [2022-07-21 09:20:08,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:20:08,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 09:20:08,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 09:20:08,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-07-21 09:20:08,970 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-21 09:20:08,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1151 places, 3301 transitions, 107867 flow. Second operand has 30 states, 30 states have (on average 50.833333333333336) internal successors, (1525), 30 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:08,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:08,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-21 09:20:08,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:20:22,182 INFO L129 PetriNetUnfolder]: 4290/9853 cut-off events. [2022-07-21 09:20:22,183 INFO L130 PetriNetUnfolder]: For 583891/583891 co-relation queries the response was YES. [2022-07-21 09:20:22,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136240 conditions, 9853 events. 4290/9853 cut-off events. For 583891/583891 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 89925 event pairs, 122 based on Foata normal form. 68/9879 useless extension candidates. Maximal degree in co-relation 135979. Up to 1764 conditions per place. [2022-07-21 09:20:22,447 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1828 selfloop transitions, 4165 changer transitions 35/6067 dead transitions. [2022-07-21 09:20:22,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1238 places, 6067 transitions, 208624 flow [2022-07-21 09:20:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-21 09:20:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-07-21 09:20:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5207 transitions. [2022-07-21 09:20:22,450 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6107201501290171 [2022-07-21 09:20:22,450 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5207 transitions. [2022-07-21 09:20:22,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5207 transitions. [2022-07-21 09:20:22,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:20:22,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5207 transitions. [2022-07-21 09:20:22,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 53.13265306122449) internal successors, (5207), 98 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:22,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 87.0) internal successors, (8613), 99 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:22,459 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 87.0) internal successors, (8613), 99 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:22,459 INFO L186 Difference]: Start difference. First operand has 1151 places, 3301 transitions, 107867 flow. Second operand 98 states and 5207 transitions. [2022-07-21 09:20:22,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1238 places, 6067 transitions, 208624 flow [2022-07-21 09:20:38,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1201 places, 6067 transitions, 202771 flow, removed 31 selfloop flow, removed 37 redundant places. [2022-07-21 09:20:38,584 INFO L242 Difference]: Finished difference. Result has 1249 places, 5730 transitions, 197598 flow [2022-07-21 09:20:38,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=104628, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2026, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=197598, PETRI_PLACES=1249, PETRI_TRANSITIONS=5730} [2022-07-21 09:20:38,588 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1172 predicate places. [2022-07-21 09:20:38,588 INFO L495 AbstractCegarLoop]: Abstraction has has 1249 places, 5730 transitions, 197598 flow [2022-07-21 09:20:38,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 50.833333333333336) internal successors, (1525), 30 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:38,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:20:38,588 INFO L200 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, 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, 1, 1, 1, 1] [2022-07-21 09:20:38,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 09:20:38,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-21 09:20:38,803 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:20:38,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:20:38,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1532947721, now seen corresponding path program 23 times [2022-07-21 09:20:38,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:20:38,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749286231] [2022-07-21 09:20:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:20:38,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:20:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:20:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:38,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:20:38,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749286231] [2022-07-21 09:20:38,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749286231] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:20:38,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120610237] [2022-07-21 09:20:38,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:20:38,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:20:38,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:20:38,955 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:20:38,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 09:20:39,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:20:39,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:20:39,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 09:20:39,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:20:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:20:39,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:20:39,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120610237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:20:39,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:20:39,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-07-21 09:20:39,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771497490] [2022-07-21 09:20:39,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:20:39,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:20:39,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:20:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:20:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-07-21 09:20:39,304 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-21 09:20:39,305 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1249 places, 5730 transitions, 197598 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:20:39,305 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:20:39,305 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-21 09:20:39,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:00,077 INFO L129 PetriNetUnfolder]: 5527/12313 cut-off events. [2022-07-21 09:21:00,077 INFO L130 PetriNetUnfolder]: For 808410/808410 co-relation queries the response was YES. [2022-07-21 09:21:00,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186611 conditions, 12313 events. 5527/12313 cut-off events. For 808410/808410 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 113687 event pairs, 240 based on Foata normal form. 5/12238 useless extension candidates. Maximal degree in co-relation 186307. Up to 2308 conditions per place. [2022-07-21 09:21:00,473 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 2042 selfloop transitions, 5942 changer transitions 34/8059 dead transitions. [2022-07-21 09:21:00,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1277 places, 8059 transitions, 292461 flow [2022-07-21 09:21:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:21:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:21:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1785 transitions. [2022-07-21 09:21:00,475 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6411637931034483 [2022-07-21 09:21:00,475 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1785 transitions. [2022-07-21 09:21:00,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1785 transitions. [2022-07-21 09:21:00,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:00,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1785 transitions. [2022-07-21 09:21:00,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.78125) internal successors, (1785), 32 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:00,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:00,478 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:00,478 INFO L186 Difference]: Start difference. First operand has 1249 places, 5730 transitions, 197598 flow. Second operand 32 states and 1785 transitions. [2022-07-21 09:21:00,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1277 places, 8059 transitions, 292461 flow