./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 791161d1 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-?-791161d [2022-07-22 21:58:15,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:58:15,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:58:15,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:58:15,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:58:15,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:58:15,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:58:15,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:58:15,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:58:15,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:58:15,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:58:15,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:58:15,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:58:15,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:58:15,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:58:15,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:58:15,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:58:15,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:58:15,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:58:15,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:58:15,565 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:58:15,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:58:15,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:58:15,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:58:15,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:58:15,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:58:15,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:58:15,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:58:15,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:58:15,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:58:15,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:58:15,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:58:15,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:58:15,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:58:15,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:58:15,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:58:15,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:58:15,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:58:15,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:58:15,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:58:15,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:58:15,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:58:15,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:58:15,604 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:58:15,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:58:15,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:58:15,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:58:15,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:58:15,605 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:58:15,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:58:15,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:58:15,606 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:58:15,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:58:15,606 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:58:15,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:58:15,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:58:15,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:58:15,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:58:15,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:58:15,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:58:15,607 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:58:15,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:58:15,607 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:58:15,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:58:15,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:58:15,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:58:15,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:58:15,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:58:15,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:58:15,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:58:15,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:58:15,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:58:15,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:58:15,610 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:58:15,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:58:15,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:58:15,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-07-22 21:58:15,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:58:15,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:58:15,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:58:15,851 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:58:15,852 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:58:15,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-07-22 21:58:15,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee2c822bd/3e8fdf1a78bf4b67841c9e283fb72606/FLAG855784e27 [2022-07-22 21:58:16,331 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:58:16,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-07-22 21:58:16,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee2c822bd/3e8fdf1a78bf4b67841c9e283fb72606/FLAG855784e27 [2022-07-22 21:58:16,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee2c822bd/3e8fdf1a78bf4b67841c9e283fb72606 [2022-07-22 21:58:16,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:58:16,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:58:16,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:58:16,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:58:16,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:58:16,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1009ad2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16, skipping insertion in model container [2022-07-22 21:58:16,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:58:16,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:58:16,595 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] [2022-07-22 21:58:16,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:58:16,602 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:58:16,627 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] [2022-07-22 21:58:16,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:58:16,638 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:58:16,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16 WrapperNode [2022-07-22 21:58:16,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:58:16,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:58:16,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:58:16,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:58:16,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,671 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-07-22 21:58:16,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:58:16,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:58:16,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:58:16,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:58:16,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:58:16,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:58:16,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:58:16,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:58:16,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (1/1) ... [2022-07-22 21:58:16,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:58:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:16,747 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) [2022-07-22 21:58:16,766 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 [2022-07-22 21:58:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:58:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:58:16,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:58:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:58:16,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:58:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:58:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:58:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:58:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:58:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:58:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:58:16,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:58:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:58:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:58:16,779 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:58:16,846 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:58:16,847 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:58:16,981 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:58:16,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:58:16,986 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:58:16,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:58:16 BoogieIcfgContainer [2022-07-22 21:58:16,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:58:16,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:58:16,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:58:16,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:58:16,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:58:16" (1/3) ... [2022-07-22 21:58:16,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5edb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:58:16, skipping insertion in model container [2022-07-22 21:58:16,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:58:16" (2/3) ... [2022-07-22 21:58:16,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5edb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:58:16, skipping insertion in model container [2022-07-22 21:58:16,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:58:16" (3/3) ... [2022-07-22 21:58:16,993 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-07-22 21:58:16,997 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:58:17,009 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:58:17,010 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:58:17,010 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:58:17,050 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:58:17,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-07-22 21:58:17,107 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-22 21:58:17,107 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:58:17,109 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. [2022-07-22 21:58:17,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-07-22 21:58:17,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-07-22 21:58:17,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:58:17,127 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@6f793ead, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44460a1 [2022-07-22 21:58:17,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:58:17,148 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-07-22 21:58:17,149 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:58:17,149 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:17,149 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] [2022-07-22 21:58:17,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:17,153 INFO L85 PathProgramCache]: Analyzing trace with hash 988547457, now seen corresponding path program 1 times [2022-07-22 21:58:17,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:17,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693352438] [2022-07-22 21:58:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:17,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693352438] [2022-07-22 21:58:17,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693352438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:17,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:17,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:17,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564410775] [2022-07-22 21:58:17,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:17,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:17,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:17,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:17,584 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:17,587 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) [2022-07-22 21:58:17,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:17,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:17,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:17,922 INFO L129 PetriNetUnfolder]: 90/301 cut-off events. [2022-07-22 21:58:17,923 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-22 21:58:17,924 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. [2022-07-22 21:58:17,927 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 55 selfloop transitions, 16 changer transitions 10/122 dead transitions. [2022-07-22 21:58:17,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 427 flow [2022-07-22 21:58:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:58:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:58:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-07-22 21:58:17,940 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6537356321839081 [2022-07-22 21:58:17,940 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-07-22 21:58:17,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-07-22 21:58:17,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:17,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-07-22 21:58:17,947 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) [2022-07-22 21:58:17,952 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) [2022-07-22 21:58:17,953 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) [2022-07-22 21:58:17,955 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 16 states and 910 transitions. [2022-07-22 21:58:17,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 427 flow [2022-07-22 21:58:17,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 413 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:58:17,960 INFO L242 Difference]: Finished difference. Result has 95 places, 82 transitions, 241 flow [2022-07-22 21:58:17,961 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} [2022-07-22 21:58:17,964 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 18 predicate places. [2022-07-22 21:58:17,964 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 241 flow [2022-07-22 21:58:17,965 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) [2022-07-22 21:58:17,965 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:17,965 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] [2022-07-22 21:58:17,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:58:17,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:17,966 INFO L85 PathProgramCache]: Analyzing trace with hash -606779393, now seen corresponding path program 2 times [2022-07-22 21:58:17,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:17,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274824003] [2022-07-22 21:58:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:17,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:18,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274824003] [2022-07-22 21:58:18,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274824003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:18,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:18,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010130385] [2022-07-22 21:58:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:18,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:18,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:18,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:18,222 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:18,222 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) [2022-07-22 21:58:18,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:18,222 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:18,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:18,453 INFO L129 PetriNetUnfolder]: 137/421 cut-off events. [2022-07-22 21:58:18,453 INFO L130 PetriNetUnfolder]: For 160/162 co-relation queries the response was YES. [2022-07-22 21:58:18,456 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. [2022-07-22 21:58:18,458 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 23 changer transitions 8/141 dead transitions. [2022-07-22 21:58:18,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 141 transitions, 660 flow [2022-07-22 21:58:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2022-07-22 21:58:18,460 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2022-07-22 21:58:18,460 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2022-07-22 21:58:18,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2022-07-22 21:58:18,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:18,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2022-07-22 21:58:18,462 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) [2022-07-22 21:58:18,464 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) [2022-07-22 21:58:18,464 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) [2022-07-22 21:58:18,464 INFO L186 Difference]: Start difference. First operand has 95 places, 82 transitions, 241 flow. Second operand 14 states and 799 transitions. [2022-07-22 21:58:18,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 141 transitions, 660 flow [2022-07-22 21:58:18,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 644 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-07-22 21:58:18,470 INFO L242 Difference]: Finished difference. Result has 102 places, 96 transitions, 382 flow [2022-07-22 21:58:18,470 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} [2022-07-22 21:58:18,471 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2022-07-22 21:58:18,471 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 96 transitions, 382 flow [2022-07-22 21:58:18,471 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) [2022-07-22 21:58:18,471 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:18,472 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] [2022-07-22 21:58:18,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:58:18,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:18,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1133456201, now seen corresponding path program 3 times [2022-07-22 21:58:18,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:18,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071131926] [2022-07-22 21:58:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:18,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:18,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:18,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071131926] [2022-07-22 21:58:18,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071131926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:18,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:18,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:18,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698421574] [2022-07-22 21:58:18,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:18,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:18,679 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:18,680 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) [2022-07-22 21:58:18,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:18,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:18,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:18,916 INFO L129 PetriNetUnfolder]: 140/436 cut-off events. [2022-07-22 21:58:18,916 INFO L130 PetriNetUnfolder]: For 442/446 co-relation queries the response was YES. [2022-07-22 21:58:18,917 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. [2022-07-22 21:58:18,919 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 25 changer transitions 8/135 dead transitions. [2022-07-22 21:58:18,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 756 flow [2022-07-22 21:58:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-22 21:58:18,921 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-22 21:58:18,922 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-22 21:58:18,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-22 21:58:18,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:18,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-22 21:58:18,923 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) [2022-07-22 21:58:18,925 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) [2022-07-22 21:58:18,925 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) [2022-07-22 21:58:18,925 INFO L186 Difference]: Start difference. First operand has 102 places, 96 transitions, 382 flow. Second operand 14 states and 790 transitions. [2022-07-22 21:58:18,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 756 flow [2022-07-22 21:58:18,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 135 transitions, 696 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-07-22 21:58:18,930 INFO L242 Difference]: Finished difference. Result has 109 places, 101 transitions, 453 flow [2022-07-22 21:58:18,930 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} [2022-07-22 21:58:18,931 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 32 predicate places. [2022-07-22 21:58:18,931 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 101 transitions, 453 flow [2022-07-22 21:58:18,931 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) [2022-07-22 21:58:18,931 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:18,931 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] [2022-07-22 21:58:18,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:58:18,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:18,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1891949299, now seen corresponding path program 4 times [2022-07-22 21:58:18,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:18,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142207109] [2022-07-22 21:58:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:18,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:19,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142207109] [2022-07-22 21:58:19,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142207109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:19,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:19,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:19,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373436260] [2022-07-22 21:58:19,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:19,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:19,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:19,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:19,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:19,088 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:19,089 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) [2022-07-22 21:58:19,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:19,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:19,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:19,351 INFO L129 PetriNetUnfolder]: 142/415 cut-off events. [2022-07-22 21:58:19,351 INFO L130 PetriNetUnfolder]: For 571/578 co-relation queries the response was YES. [2022-07-22 21:58:19,352 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. [2022-07-22 21:58:19,354 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 30 changer transitions 8/142 dead transitions. [2022-07-22 21:58:19,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 142 transitions, 860 flow [2022-07-22 21:58:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-07-22 21:58:19,356 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-07-22 21:58:19,356 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-07-22 21:58:19,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-07-22 21:58:19,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:19,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-07-22 21:58:19,357 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) [2022-07-22 21:58:19,359 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) [2022-07-22 21:58:19,359 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) [2022-07-22 21:58:19,359 INFO L186 Difference]: Start difference. First operand has 109 places, 101 transitions, 453 flow. Second operand 14 states and 792 transitions. [2022-07-22 21:58:19,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 142 transitions, 860 flow [2022-07-22 21:58:19,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 142 transitions, 776 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-22 21:58:19,363 INFO L242 Difference]: Finished difference. Result has 113 places, 106 transitions, 522 flow [2022-07-22 21:58:19,363 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} [2022-07-22 21:58:19,364 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 36 predicate places. [2022-07-22 21:58:19,364 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 106 transitions, 522 flow [2022-07-22 21:58:19,364 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) [2022-07-22 21:58:19,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:19,364 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] [2022-07-22 21:58:19,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:58:19,365 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:19,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1806850797, now seen corresponding path program 5 times [2022-07-22 21:58:19,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:19,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362357284] [2022-07-22 21:58:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:19,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:19,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:19,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362357284] [2022-07-22 21:58:19,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362357284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:19,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:19,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:19,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504690125] [2022-07-22 21:58:19,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:19,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:19,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:19,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:19,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:19,518 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:19,518 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) [2022-07-22 21:58:19,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:19,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:19,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:19,765 INFO L129 PetriNetUnfolder]: 148/470 cut-off events. [2022-07-22 21:58:19,765 INFO L130 PetriNetUnfolder]: For 749/758 co-relation queries the response was YES. [2022-07-22 21:58:19,766 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. [2022-07-22 21:58:19,768 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 30 changer transitions 8/146 dead transitions. [2022-07-22 21:58:19,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 146 transitions, 901 flow [2022-07-22 21:58:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-07-22 21:58:19,770 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-07-22 21:58:19,770 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-07-22 21:58:19,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-07-22 21:58:19,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:19,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-07-22 21:58:19,771 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) [2022-07-22 21:58:19,773 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) [2022-07-22 21:58:19,773 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) [2022-07-22 21:58:19,773 INFO L186 Difference]: Start difference. First operand has 113 places, 106 transitions, 522 flow. Second operand 14 states and 796 transitions. [2022-07-22 21:58:19,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 146 transitions, 901 flow [2022-07-22 21:58:19,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 146 transitions, 833 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-22 21:58:19,777 INFO L242 Difference]: Finished difference. Result has 116 places, 107 transitions, 540 flow [2022-07-22 21:58:19,777 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} [2022-07-22 21:58:19,778 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 39 predicate places. [2022-07-22 21:58:19,778 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 540 flow [2022-07-22 21:58:19,778 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) [2022-07-22 21:58:19,778 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:19,778 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] [2022-07-22 21:58:19,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:58:19,779 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:19,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash 338165169, now seen corresponding path program 6 times [2022-07-22 21:58:19,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:19,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828579034] [2022-07-22 21:58:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:19,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:19,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:19,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828579034] [2022-07-22 21:58:19,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828579034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:19,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:19,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-22 21:58:19,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234962911] [2022-07-22 21:58:19,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:19,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 21:58:19,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:19,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 21:58:19,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:58:19,937 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:19,938 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) [2022-07-22 21:58:19,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:19,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:19,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:20,142 INFO L129 PetriNetUnfolder]: 145/456 cut-off events. [2022-07-22 21:58:20,142 INFO L130 PetriNetUnfolder]: For 728/730 co-relation queries the response was YES. [2022-07-22 21:58:20,144 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. [2022-07-22 21:58:20,145 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 28 changer transitions 8/141 dead transitions. [2022-07-22 21:58:20,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 141 transitions, 890 flow [2022-07-22 21:58:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-22 21:58:20,147 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-22 21:58:20,147 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-22 21:58:20,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-22 21:58:20,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:20,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-22 21:58:20,149 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) [2022-07-22 21:58:20,150 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) [2022-07-22 21:58:20,150 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) [2022-07-22 21:58:20,150 INFO L186 Difference]: Start difference. First operand has 116 places, 107 transitions, 540 flow. Second operand 14 states and 790 transitions. [2022-07-22 21:58:20,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 141 transitions, 890 flow [2022-07-22 21:58:20,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 141 transitions, 816 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:20,155 INFO L242 Difference]: Finished difference. Result has 117 places, 105 transitions, 518 flow [2022-07-22 21:58:20,155 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} [2022-07-22 21:58:20,157 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2022-07-22 21:58:20,157 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 518 flow [2022-07-22 21:58:20,157 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) [2022-07-22 21:58:20,157 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:20,158 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] [2022-07-22 21:58:20,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:58:20,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash -210038721, now seen corresponding path program 7 times [2022-07-22 21:58:20,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:20,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532808136] [2022-07-22 21:58:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:20,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:20,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532808136] [2022-07-22 21:58:20,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532808136] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:20,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:20,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-22 21:58:20,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026209633] [2022-07-22 21:58:20,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:20,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 21:58:20,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 21:58:20,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:58:20,333 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:20,334 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) [2022-07-22 21:58:20,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:20,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:20,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:20,615 INFO L129 PetriNetUnfolder]: 166/469 cut-off events. [2022-07-22 21:58:20,615 INFO L130 PetriNetUnfolder]: For 853/853 co-relation queries the response was YES. [2022-07-22 21:58:20,616 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. [2022-07-22 21:58:20,618 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 37 changer transitions 8/147 dead transitions. [2022-07-22 21:58:20,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 147 transitions, 975 flow [2022-07-22 21:58:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-07-22 21:58:20,620 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-07-22 21:58:20,620 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-07-22 21:58:20,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-07-22 21:58:20,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:20,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-07-22 21:58:20,622 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) [2022-07-22 21:58:20,624 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) [2022-07-22 21:58:20,624 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) [2022-07-22 21:58:20,624 INFO L186 Difference]: Start difference. First operand has 117 places, 105 transitions, 518 flow. Second operand 14 states and 794 transitions. [2022-07-22 21:58:20,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 147 transitions, 975 flow [2022-07-22 21:58:20,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 879 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:20,629 INFO L242 Difference]: Finished difference. Result has 119 places, 116 transitions, 669 flow [2022-07-22 21:58:20,629 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} [2022-07-22 21:58:20,630 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-07-22 21:58:20,630 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 669 flow [2022-07-22 21:58:20,630 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) [2022-07-22 21:58:20,630 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:20,630 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] [2022-07-22 21:58:20,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:58:20,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1678747771, now seen corresponding path program 8 times [2022-07-22 21:58:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338852506] [2022-07-22 21:58:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:20,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:20,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338852506] [2022-07-22 21:58:20,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338852506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:20,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:20,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:20,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452498064] [2022-07-22 21:58:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:20,753 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:20,753 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) [2022-07-22 21:58:20,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:20,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:20,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:21,009 INFO L129 PetriNetUnfolder]: 185/525 cut-off events. [2022-07-22 21:58:21,010 INFO L130 PetriNetUnfolder]: For 1263/1267 co-relation queries the response was YES. [2022-07-22 21:58:21,011 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. [2022-07-22 21:58:21,014 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 43 changer transitions 7/156 dead transitions. [2022-07-22 21:58:21,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 156 transitions, 1142 flow [2022-07-22 21:58:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-22 21:58:21,016 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-22 21:58:21,016 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-22 21:58:21,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-22 21:58:21,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:21,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-22 21:58:21,018 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) [2022-07-22 21:58:21,019 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) [2022-07-22 21:58:21,019 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) [2022-07-22 21:58:21,020 INFO L186 Difference]: Start difference. First operand has 119 places, 116 transitions, 669 flow. Second operand 14 states and 793 transitions. [2022-07-22 21:58:21,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 156 transitions, 1142 flow [2022-07-22 21:58:21,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1075 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-07-22 21:58:21,025 INFO L242 Difference]: Finished difference. Result has 126 places, 125 transitions, 850 flow [2022-07-22 21:58:21,026 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} [2022-07-22 21:58:21,026 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 49 predicate places. [2022-07-22 21:58:21,026 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 850 flow [2022-07-22 21:58:21,027 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) [2022-07-22 21:58:21,027 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:21,027 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] [2022-07-22 21:58:21,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:58:21,027 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1095483919, now seen corresponding path program 9 times [2022-07-22 21:58:21,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:21,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147431058] [2022-07-22 21:58:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:21,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:21,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147431058] [2022-07-22 21:58:21,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147431058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:21,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:21,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:21,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423916505] [2022-07-22 21:58:21,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:21,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:21,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:21,160 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:21,161 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) [2022-07-22 21:58:21,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:21,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:21,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:21,415 INFO L129 PetriNetUnfolder]: 184/522 cut-off events. [2022-07-22 21:58:21,415 INFO L130 PetriNetUnfolder]: For 1694/1698 co-relation queries the response was YES. [2022-07-22 21:58:21,417 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. [2022-07-22 21:58:21,419 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 44 changer transitions 7/157 dead transitions. [2022-07-22 21:58:21,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 157 transitions, 1247 flow [2022-07-22 21:58:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-22 21:58:21,421 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-22 21:58:21,421 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-22 21:58:21,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-22 21:58:21,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:21,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-22 21:58:21,424 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) [2022-07-22 21:58:21,426 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) [2022-07-22 21:58:21,426 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) [2022-07-22 21:58:21,427 INFO L186 Difference]: Start difference. First operand has 126 places, 125 transitions, 850 flow. Second operand 14 states and 793 transitions. [2022-07-22 21:58:21,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 157 transitions, 1247 flow [2022-07-22 21:58:21,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 157 transitions, 1163 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-07-22 21:58:21,435 INFO L242 Difference]: Finished difference. Result has 132 places, 127 transitions, 920 flow [2022-07-22 21:58:21,435 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} [2022-07-22 21:58:21,436 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-07-22 21:58:21,436 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 920 flow [2022-07-22 21:58:21,436 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) [2022-07-22 21:58:21,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:21,437 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] [2022-07-22 21:58:21,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:58:21,437 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:21,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2108680237, now seen corresponding path program 10 times [2022-07-22 21:58:21,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:21,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316037980] [2022-07-22 21:58:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:21,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:21,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:21,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316037980] [2022-07-22 21:58:21,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316037980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:21,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:21,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:21,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866864358] [2022-07-22 21:58:21,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:21,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:21,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:21,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:21,600 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) [2022-07-22 21:58:21,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:21,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:21,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:21,890 INFO L129 PetriNetUnfolder]: 180/503 cut-off events. [2022-07-22 21:58:21,890 INFO L130 PetriNetUnfolder]: For 2010/2010 co-relation queries the response was YES. [2022-07-22 21:58:21,892 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. [2022-07-22 21:58:21,894 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 44 changer transitions 7/160 dead transitions. [2022-07-22 21:58:21,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 1297 flow [2022-07-22 21:58:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-07-22 21:58:21,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-07-22 21:58:21,895 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-07-22 21:58:21,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-07-22 21:58:21,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:21,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-07-22 21:58:21,896 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) [2022-07-22 21:58:21,897 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) [2022-07-22 21:58:21,898 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) [2022-07-22 21:58:21,898 INFO L186 Difference]: Start difference. First operand has 132 places, 127 transitions, 920 flow. Second operand 14 states and 795 transitions. [2022-07-22 21:58:21,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 1297 flow [2022-07-22 21:58:21,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 160 transitions, 1201 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-07-22 21:58:21,905 INFO L242 Difference]: Finished difference. Result has 136 places, 128 transitions, 938 flow [2022-07-22 21:58:21,906 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} [2022-07-22 21:58:21,906 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-07-22 21:58:21,906 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 938 flow [2022-07-22 21:58:21,907 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) [2022-07-22 21:58:21,907 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:21,907 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] [2022-07-22 21:58:21,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:58:21,907 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:21,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:21,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2083365095, now seen corresponding path program 11 times [2022-07-22 21:58:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:21,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412286382] [2022-07-22 21:58:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:21,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:22,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412286382] [2022-07-22 21:58:22,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412286382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:22,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:22,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:22,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907625073] [2022-07-22 21:58:22,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:22,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:22,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:22,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:22,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:22,034 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:22,035 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) [2022-07-22 21:58:22,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:22,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:22,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:22,268 INFO L129 PetriNetUnfolder]: 180/498 cut-off events. [2022-07-22 21:58:22,269 INFO L130 PetriNetUnfolder]: For 1977/1979 co-relation queries the response was YES. [2022-07-22 21:58:22,270 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. [2022-07-22 21:58:22,272 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 42 changer transitions 9/158 dead transitions. [2022-07-22 21:58:22,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 158 transitions, 1295 flow [2022-07-22 21:58:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-22 21:58:22,274 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-22 21:58:22,274 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-22 21:58:22,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-22 21:58:22,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:22,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-22 21:58:22,277 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) [2022-07-22 21:58:22,279 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) [2022-07-22 21:58:22,280 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) [2022-07-22 21:58:22,280 INFO L186 Difference]: Start difference. First operand has 136 places, 128 transitions, 938 flow. Second operand 14 states and 793 transitions. [2022-07-22 21:58:22,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 158 transitions, 1295 flow [2022-07-22 21:58:22,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 158 transitions, 1193 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:22,289 INFO L242 Difference]: Finished difference. Result has 137 places, 126 transitions, 905 flow [2022-07-22 21:58:22,289 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} [2022-07-22 21:58:22,290 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-22 21:58:22,290 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 126 transitions, 905 flow [2022-07-22 21:58:22,290 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) [2022-07-22 21:58:22,290 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:22,290 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] [2022-07-22 21:58:22,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:58:22,290 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash 536902577, now seen corresponding path program 12 times [2022-07-22 21:58:22,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:22,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570486248] [2022-07-22 21:58:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:22,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:22,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:22,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570486248] [2022-07-22 21:58:22,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570486248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:22,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:22,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:22,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117775270] [2022-07-22 21:58:22,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:22,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:22,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:22,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:22,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:22,426 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:22,427 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) [2022-07-22 21:58:22,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:22,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:22,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:22,665 INFO L129 PetriNetUnfolder]: 185/534 cut-off events. [2022-07-22 21:58:22,665 INFO L130 PetriNetUnfolder]: For 2069/2069 co-relation queries the response was YES. [2022-07-22 21:58:22,666 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. [2022-07-22 21:58:22,668 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 44 changer transitions 8/162 dead transitions. [2022-07-22 21:58:22,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 162 transitions, 1303 flow [2022-07-22 21:58:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2022-07-22 21:58:22,670 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2022-07-22 21:58:22,670 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2022-07-22 21:58:22,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2022-07-22 21:58:22,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:22,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2022-07-22 21:58:22,671 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) [2022-07-22 21:58:22,672 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) [2022-07-22 21:58:22,673 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) [2022-07-22 21:58:22,673 INFO L186 Difference]: Start difference. First operand has 137 places, 126 transitions, 905 flow. Second operand 14 states and 797 transitions. [2022-07-22 21:58:22,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 162 transitions, 1303 flow [2022-07-22 21:58:22,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 162 transitions, 1201 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:22,683 INFO L242 Difference]: Finished difference. Result has 137 places, 128 transitions, 929 flow [2022-07-22 21:58:22,683 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} [2022-07-22 21:58:22,684 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-22 21:58:22,684 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 128 transitions, 929 flow [2022-07-22 21:58:22,684 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) [2022-07-22 21:58:22,684 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:22,684 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] [2022-07-22 21:58:22,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:58:22,684 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:22,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1478478085, now seen corresponding path program 13 times [2022-07-22 21:58:22,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:22,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189868525] [2022-07-22 21:58:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:22,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:22,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:22,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189868525] [2022-07-22 21:58:22,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189868525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:22,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:22,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:22,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262839174] [2022-07-22 21:58:22,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:22,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:22,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:22,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:22,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:22,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:22,889 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) [2022-07-22 21:58:22,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:22,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:22,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:23,232 INFO L129 PetriNetUnfolder]: 186/555 cut-off events. [2022-07-22 21:58:23,233 INFO L130 PetriNetUnfolder]: For 2147/2151 co-relation queries the response was YES. [2022-07-22 21:58:23,235 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. [2022-07-22 21:58:23,237 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 40 changer transitions 9/157 dead transitions. [2022-07-22 21:58:23,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 157 transitions, 1284 flow [2022-07-22 21:58:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-07-22 21:58:23,238 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-07-22 21:58:23,239 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-07-22 21:58:23,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-07-22 21:58:23,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:23,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-07-22 21:58:23,240 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) [2022-07-22 21:58:23,241 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) [2022-07-22 21:58:23,241 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) [2022-07-22 21:58:23,242 INFO L186 Difference]: Start difference. First operand has 137 places, 128 transitions, 929 flow. Second operand 14 states and 792 transitions. [2022-07-22 21:58:23,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 157 transitions, 1284 flow [2022-07-22 21:58:23,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 157 transitions, 1182 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:23,249 INFO L242 Difference]: Finished difference. Result has 137 places, 125 transitions, 882 flow [2022-07-22 21:58:23,250 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} [2022-07-22 21:58:23,250 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-22 21:58:23,251 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 882 flow [2022-07-22 21:58:23,251 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) [2022-07-22 21:58:23,251 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:23,251 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] [2022-07-22 21:58:23,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:58:23,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1731083455, now seen corresponding path program 14 times [2022-07-22 21:58:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343512201] [2022-07-22 21:58:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:23,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343512201] [2022-07-22 21:58:23,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343512201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:23,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:23,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:23,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506543513] [2022-07-22 21:58:23,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:23,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:23,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:23,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:23,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:23,387 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) [2022-07-22 21:58:23,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:23,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:23,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:23,648 INFO L129 PetriNetUnfolder]: 181/515 cut-off events. [2022-07-22 21:58:23,648 INFO L130 PetriNetUnfolder]: For 2031/2033 co-relation queries the response was YES. [2022-07-22 21:58:23,650 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. [2022-07-22 21:58:23,652 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 42 changer transitions 8/157 dead transitions. [2022-07-22 21:58:23,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 157 transitions, 1278 flow [2022-07-22 21:58:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-22 21:58:23,655 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-22 21:58:23,655 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-22 21:58:23,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-22 21:58:23,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:23,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-22 21:58:23,657 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) [2022-07-22 21:58:23,658 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) [2022-07-22 21:58:23,659 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) [2022-07-22 21:58:23,659 INFO L186 Difference]: Start difference. First operand has 137 places, 125 transitions, 882 flow. Second operand 14 states and 793 transitions. [2022-07-22 21:58:23,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 157 transitions, 1278 flow [2022-07-22 21:58:23,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 157 transitions, 1180 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-22 21:58:23,666 INFO L242 Difference]: Finished difference. Result has 139 places, 127 transitions, 926 flow [2022-07-22 21:58:23,666 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} [2022-07-22 21:58:23,667 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 62 predicate places. [2022-07-22 21:58:23,667 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 127 transitions, 926 flow [2022-07-22 21:58:23,667 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) [2022-07-22 21:58:23,668 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:23,668 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] [2022-07-22 21:58:23,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:58:23,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524753, now seen corresponding path program 15 times [2022-07-22 21:58:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:23,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579990562] [2022-07-22 21:58:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:23,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:23,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:23,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579990562] [2022-07-22 21:58:23,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579990562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:23,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:23,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:23,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698531806] [2022-07-22 21:58:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:23,838 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:23,838 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) [2022-07-22 21:58:23,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:23,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:23,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:24,068 INFO L129 PetriNetUnfolder]: 179/508 cut-off events. [2022-07-22 21:58:24,068 INFO L130 PetriNetUnfolder]: For 2057/2059 co-relation queries the response was YES. [2022-07-22 21:58:24,070 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. [2022-07-22 21:58:24,072 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 38 changer transitions 8/157 dead transitions. [2022-07-22 21:58:24,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 157 transitions, 1312 flow [2022-07-22 21:58:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2022-07-22 21:58:24,073 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2022-07-22 21:58:24,074 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2022-07-22 21:58:24,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2022-07-22 21:58:24,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:24,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2022-07-22 21:58:24,075 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) [2022-07-22 21:58:24,076 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) [2022-07-22 21:58:24,086 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) [2022-07-22 21:58:24,086 INFO L186 Difference]: Start difference. First operand has 139 places, 127 transitions, 926 flow. Second operand 14 states and 788 transitions. [2022-07-22 21:58:24,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 157 transitions, 1312 flow [2022-07-22 21:58:24,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 157 transitions, 1235 flow, removed 7 selfloop flow, removed 10 redundant places. [2022-07-22 21:58:24,094 INFO L242 Difference]: Finished difference. Result has 142 places, 125 transitions, 911 flow [2022-07-22 21:58:24,094 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} [2022-07-22 21:58:24,095 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 65 predicate places. [2022-07-22 21:58:24,095 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 125 transitions, 911 flow [2022-07-22 21:58:24,096 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) [2022-07-22 21:58:24,096 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:24,096 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] [2022-07-22 21:58:24,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:58:24,097 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash 967734761, now seen corresponding path program 16 times [2022-07-22 21:58:24,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:24,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062898336] [2022-07-22 21:58:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:24,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:24,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:24,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062898336] [2022-07-22 21:58:24,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062898336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:24,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:24,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:24,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021651907] [2022-07-22 21:58:24,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:24,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:24,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:24,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:24,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:24,237 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:24,237 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) [2022-07-22 21:58:24,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:24,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:24,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:24,483 INFO L129 PetriNetUnfolder]: 183/550 cut-off events. [2022-07-22 21:58:24,483 INFO L130 PetriNetUnfolder]: For 2125/2129 co-relation queries the response was YES. [2022-07-22 21:58:24,486 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. [2022-07-22 21:58:24,488 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 39 changer transitions 7/159 dead transitions. [2022-07-22 21:58:24,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 159 transitions, 1325 flow [2022-07-22 21:58:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-22 21:58:24,489 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-22 21:58:24,489 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-22 21:58:24,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-22 21:58:24,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:24,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-22 21:58:24,491 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) [2022-07-22 21:58:24,492 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) [2022-07-22 21:58:24,492 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) [2022-07-22 21:58:24,493 INFO L186 Difference]: Start difference. First operand has 142 places, 125 transitions, 911 flow. Second operand 14 states and 790 transitions. [2022-07-22 21:58:24,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 159 transitions, 1325 flow [2022-07-22 21:58:24,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 159 transitions, 1235 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:24,501 INFO L242 Difference]: Finished difference. Result has 142 places, 126 transitions, 927 flow [2022-07-22 21:58:24,501 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} [2022-07-22 21:58:24,501 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 65 predicate places. [2022-07-22 21:58:24,503 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 126 transitions, 927 flow [2022-07-22 21:58:24,503 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) [2022-07-22 21:58:24,503 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:24,503 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] [2022-07-22 21:58:24,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:58:24,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:24,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:24,504 INFO L85 PathProgramCache]: Analyzing trace with hash 18414173, now seen corresponding path program 17 times [2022-07-22 21:58:24,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:24,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534875261] [2022-07-22 21:58:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:24,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:24,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:24,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534875261] [2022-07-22 21:58:24,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534875261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:24,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:24,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:24,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892976410] [2022-07-22 21:58:24,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:24,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:24,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:24,631 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:24,631 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) [2022-07-22 21:58:24,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:24,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:24,632 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:24,877 INFO L129 PetriNetUnfolder]: 182/549 cut-off events. [2022-07-22 21:58:24,877 INFO L130 PetriNetUnfolder]: For 2195/2199 co-relation queries the response was YES. [2022-07-22 21:58:24,879 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. [2022-07-22 21:58:24,882 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 38 changer transitions 8/154 dead transitions. [2022-07-22 21:58:24,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 154 transitions, 1287 flow [2022-07-22 21:58:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-07-22 21:58:24,884 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-07-22 21:58:24,884 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-07-22 21:58:24,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-07-22 21:58:24,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:24,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-07-22 21:58:24,885 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) [2022-07-22 21:58:24,887 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) [2022-07-22 21:58:24,887 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) [2022-07-22 21:58:24,887 INFO L186 Difference]: Start difference. First operand has 142 places, 126 transitions, 927 flow. Second operand 14 states and 791 transitions. [2022-07-22 21:58:24,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 154 transitions, 1287 flow [2022-07-22 21:58:24,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 154 transitions, 1191 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:24,895 INFO L242 Difference]: Finished difference. Result has 143 places, 124 transitions, 895 flow [2022-07-22 21:58:24,895 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} [2022-07-22 21:58:24,895 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-07-22 21:58:24,895 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 124 transitions, 895 flow [2022-07-22 21:58:24,896 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) [2022-07-22 21:58:24,896 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:24,896 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] [2022-07-22 21:58:24,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:58:24,896 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:24,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash 386002791, now seen corresponding path program 18 times [2022-07-22 21:58:24,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:24,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732128695] [2022-07-22 21:58:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:24,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:25,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:25,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732128695] [2022-07-22 21:58:25,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732128695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:25,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:25,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:25,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723975847] [2022-07-22 21:58:25,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:25,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:25,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:25,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:25,025 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:25,025 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) [2022-07-22 21:58:25,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:25,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:25,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:25,307 INFO L129 PetriNetUnfolder]: 177/518 cut-off events. [2022-07-22 21:58:25,307 INFO L130 PetriNetUnfolder]: For 2182/2184 co-relation queries the response was YES. [2022-07-22 21:58:25,309 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. [2022-07-22 21:58:25,311 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 40 changer transitions 7/157 dead transitions. [2022-07-22 21:58:25,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1294 flow [2022-07-22 21:58:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-07-22 21:58:25,312 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-07-22 21:58:25,312 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-07-22 21:58:25,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-07-22 21:58:25,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:25,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-07-22 21:58:25,313 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) [2022-07-22 21:58:25,314 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) [2022-07-22 21:58:25,314 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) [2022-07-22 21:58:25,314 INFO L186 Difference]: Start difference. First operand has 143 places, 124 transitions, 895 flow. Second operand 14 states and 794 transitions. [2022-07-22 21:58:25,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1294 flow [2022-07-22 21:58:25,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 157 transitions, 1202 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:25,321 INFO L242 Difference]: Finished difference. Result has 143 places, 126 transitions, 924 flow [2022-07-22 21:58:25,322 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} [2022-07-22 21:58:25,322 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-07-22 21:58:25,322 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 924 flow [2022-07-22 21:58:25,322 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) [2022-07-22 21:58:25,322 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:25,322 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] [2022-07-22 21:58:25,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:58:25,322 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:25,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:25,323 INFO L85 PathProgramCache]: Analyzing trace with hash -730886041, now seen corresponding path program 19 times [2022-07-22 21:58:25,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:25,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975865868] [2022-07-22 21:58:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:25,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:25,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:25,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975865868] [2022-07-22 21:58:25,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975865868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:25,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:25,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:25,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468803526] [2022-07-22 21:58:25,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:25,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:25,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:25,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:25,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:25,444 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:25,445 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) [2022-07-22 21:58:25,445 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:25,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:25,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:25,701 INFO L129 PetriNetUnfolder]: 183/565 cut-off events. [2022-07-22 21:58:25,701 INFO L130 PetriNetUnfolder]: For 2365/2369 co-relation queries the response was YES. [2022-07-22 21:58:25,704 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. [2022-07-22 21:58:25,706 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 73 selfloop transitions, 38 changer transitions 8/160 dead transitions. [2022-07-22 21:58:25,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 160 transitions, 1329 flow [2022-07-22 21:58:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-07-22 21:58:25,707 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-07-22 21:58:25,707 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-07-22 21:58:25,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-07-22 21:58:25,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:25,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-07-22 21:58:25,708 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) [2022-07-22 21:58:25,709 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) [2022-07-22 21:58:25,710 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) [2022-07-22 21:58:25,710 INFO L186 Difference]: Start difference. First operand has 143 places, 126 transitions, 924 flow. Second operand 14 states and 796 transitions. [2022-07-22 21:58:25,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 160 transitions, 1329 flow [2022-07-22 21:58:25,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 160 transitions, 1233 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:25,718 INFO L242 Difference]: Finished difference. Result has 145 places, 127 transitions, 932 flow [2022-07-22 21:58:25,718 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} [2022-07-22 21:58:25,719 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-07-22 21:58:25,719 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 127 transitions, 932 flow [2022-07-22 21:58:25,719 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) [2022-07-22 21:58:25,719 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:25,719 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] [2022-07-22 21:58:25,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:58:25,719 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:25,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:25,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1585546923, now seen corresponding path program 20 times [2022-07-22 21:58:25,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155480081] [2022-07-22 21:58:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:25,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:25,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155480081] [2022-07-22 21:58:25,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155480081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:25,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:25,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 21:58:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877176805] [2022-07-22 21:58:25,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:58:25,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:25,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:58:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:58:25,858 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 21:58:25,858 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) [2022-07-22 21:58:25,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:25,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 21:58:25,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:26,103 INFO L129 PetriNetUnfolder]: 180/558 cut-off events. [2022-07-22 21:58:26,103 INFO L130 PetriNetUnfolder]: For 2427/2431 co-relation queries the response was YES. [2022-07-22 21:58:26,105 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. [2022-07-22 21:58:26,108 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 36 changer transitions 8/154 dead transitions. [2022-07-22 21:58:26,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 1291 flow [2022-07-22 21:58:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:58:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:58:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-22 21:58:26,109 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-22 21:58:26,109 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-22 21:58:26,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-22 21:58:26,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:26,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-22 21:58:26,110 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) [2022-07-22 21:58:26,111 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) [2022-07-22 21:58:26,111 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) [2022-07-22 21:58:26,111 INFO L186 Difference]: Start difference. First operand has 145 places, 127 transitions, 932 flow. Second operand 14 states and 790 transitions. [2022-07-22 21:58:26,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 1291 flow [2022-07-22 21:58:26,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 154 transitions, 1197 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:26,120 INFO L242 Difference]: Finished difference. Result has 145 places, 124 transitions, 885 flow [2022-07-22 21:58:26,120 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} [2022-07-22 21:58:26,121 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-07-22 21:58:26,121 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 885 flow [2022-07-22 21:58:26,121 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) [2022-07-22 21:58:26,121 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:26,121 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] [2022-07-22 21:58:26,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:58:26,121 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:26,122 INFO L85 PathProgramCache]: Analyzing trace with hash -859363161, now seen corresponding path program 1 times [2022-07-22 21:58:26,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:26,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146484905] [2022-07-22 21:58:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:26,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:26,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146484905] [2022-07-22 21:58:26,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146484905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:26,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200652773] [2022-07-22 21:58:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:26,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:26,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:26,156 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) [2022-07-22 21:58:26,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:58:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:26,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:58:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:26,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:26,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200652773] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:26,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:58:26,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-07-22 21:58:26,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012605202] [2022-07-22 21:58:26,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:26,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:26,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:26,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:58:26,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:26,276 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) [2022-07-22 21:58:26,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:26,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:26,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:26,385 INFO L129 PetriNetUnfolder]: 187/539 cut-off events. [2022-07-22 21:58:26,385 INFO L130 PetriNetUnfolder]: For 2641/2643 co-relation queries the response was YES. [2022-07-22 21:58:26,387 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. [2022-07-22 21:58:26,390 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2022-07-22 21:58:26,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 176 transitions, 1659 flow [2022-07-22 21:58:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:58:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:58:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-07-22 21:58:26,391 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-07-22 21:58:26,391 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-07-22 21:58:26,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-07-22 21:58:26,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:26,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-07-22 21:58:26,392 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) [2022-07-22 21:58:26,393 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) [2022-07-22 21:58:26,393 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) [2022-07-22 21:58:26,393 INFO L186 Difference]: Start difference. First operand has 145 places, 124 transitions, 885 flow. Second operand 7 states and 483 transitions. [2022-07-22 21:58:26,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 176 transitions, 1659 flow [2022-07-22 21:58:26,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 176 transitions, 1537 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-07-22 21:58:26,402 INFO L242 Difference]: Finished difference. Result has 136 places, 139 transitions, 1049 flow [2022-07-22 21:58:26,402 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} [2022-07-22 21:58:26,403 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-07-22 21:58:26,403 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 139 transitions, 1049 flow [2022-07-22 21:58:26,403 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) [2022-07-22 21:58:26,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:26,403 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] [2022-07-22 21:58:26,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:26,622 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 [2022-07-22 21:58:26,623 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1370591913, now seen corresponding path program 2 times [2022-07-22 21:58:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:26,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815321507] [2022-07-22 21:58:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:26,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:26,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:26,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815321507] [2022-07-22 21:58:26,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815321507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:26,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:26,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:58:26,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645818898] [2022-07-22 21:58:26,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:26,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:26,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:26,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:26,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:58:26,653 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:26,653 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) [2022-07-22 21:58:26,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:26,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:26,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:26,775 INFO L129 PetriNetUnfolder]: 219/656 cut-off events. [2022-07-22 21:58:26,775 INFO L130 PetriNetUnfolder]: For 3315/3326 co-relation queries the response was YES. [2022-07-22 21:58:26,778 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. [2022-07-22 21:58:26,780 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2022-07-22 21:58:26,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 1835 flow [2022-07-22 21:58:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:58:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:58:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2022-07-22 21:58:26,782 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2022-07-22 21:58:26,782 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2022-07-22 21:58:26,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2022-07-22 21:58:26,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:26,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2022-07-22 21:58:26,783 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) [2022-07-22 21:58:26,783 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) [2022-07-22 21:58:26,784 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) [2022-07-22 21:58:26,784 INFO L186 Difference]: Start difference. First operand has 136 places, 139 transitions, 1049 flow. Second operand 8 states and 561 transitions. [2022-07-22 21:58:26,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 1835 flow [2022-07-22 21:58:26,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1789 flow, removed 23 selfloop flow, removed 0 redundant places. [2022-07-22 21:58:26,797 INFO L242 Difference]: Finished difference. Result has 149 places, 156 transitions, 1411 flow [2022-07-22 21:58:26,797 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} [2022-07-22 21:58:26,797 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2022-07-22 21:58:26,797 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1411 flow [2022-07-22 21:58:26,797 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) [2022-07-22 21:58:26,798 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:26,798 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] [2022-07-22 21:58:26,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 21:58:26,798 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:26,798 INFO L85 PathProgramCache]: Analyzing trace with hash -212945927, now seen corresponding path program 1 times [2022-07-22 21:58:26,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:26,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182193492] [2022-07-22 21:58:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:26,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:26,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:26,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182193492] [2022-07-22 21:58:26,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182193492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:26,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:26,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:58:26,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133075784] [2022-07-22 21:58:26,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:26,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:26,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:26,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:26,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:58:26,819 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:26,819 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) [2022-07-22 21:58:26,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:26,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:26,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:26,923 INFO L129 PetriNetUnfolder]: 208/637 cut-off events. [2022-07-22 21:58:26,923 INFO L130 PetriNetUnfolder]: For 4280/4291 co-relation queries the response was YES. [2022-07-22 21:58:26,926 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. [2022-07-22 21:58:26,929 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 102 selfloop transitions, 30 changer transitions 5/186 dead transitions. [2022-07-22 21:58:26,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 186 transitions, 1898 flow [2022-07-22 21:58:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:58:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:58:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2022-07-22 21:58:26,930 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2022-07-22 21:58:26,930 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2022-07-22 21:58:26,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2022-07-22 21:58:26,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:26,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2022-07-22 21:58:26,931 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) [2022-07-22 21:58:26,932 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) [2022-07-22 21:58:26,932 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) [2022-07-22 21:58:26,932 INFO L186 Difference]: Start difference. First operand has 149 places, 156 transitions, 1411 flow. Second operand 7 states and 486 transitions. [2022-07-22 21:58:26,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 186 transitions, 1898 flow [2022-07-22 21:58:26,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 186 transitions, 1854 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-22 21:58:26,945 INFO L242 Difference]: Finished difference. Result has 153 places, 155 transitions, 1421 flow [2022-07-22 21:58:26,945 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} [2022-07-22 21:58:26,946 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 76 predicate places. [2022-07-22 21:58:26,946 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 155 transitions, 1421 flow [2022-07-22 21:58:26,946 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) [2022-07-22 21:58:26,946 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:26,946 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] [2022-07-22 21:58:26,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 21:58:26,947 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash -599915105, now seen corresponding path program 2 times [2022-07-22 21:58:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:26,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984321760] [2022-07-22 21:58:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:26,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:26,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984321760] [2022-07-22 21:58:26,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984321760] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:26,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:26,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:58:26,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295715903] [2022-07-22 21:58:26,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:26,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:26,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:26,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:26,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:58:26,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:26,968 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) [2022-07-22 21:58:26,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:26,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:26,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:27,109 INFO L129 PetriNetUnfolder]: 228/704 cut-off events. [2022-07-22 21:58:27,109 INFO L130 PetriNetUnfolder]: For 5033/5043 co-relation queries the response was YES. [2022-07-22 21:58:27,111 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. [2022-07-22 21:58:27,114 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 45 changer transitions 2/224 dead transitions. [2022-07-22 21:58:27,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 224 transitions, 2406 flow [2022-07-22 21:58:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:58:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:58:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2022-07-22 21:58:27,115 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8132183908045977 [2022-07-22 21:58:27,115 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2022-07-22 21:58:27,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2022-07-22 21:58:27,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:27,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2022-07-22 21:58:27,117 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) [2022-07-22 21:58:27,117 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) [2022-07-22 21:58:27,117 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) [2022-07-22 21:58:27,118 INFO L186 Difference]: Start difference. First operand has 153 places, 155 transitions, 1421 flow. Second operand 8 states and 566 transitions. [2022-07-22 21:58:27,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 224 transitions, 2406 flow [2022-07-22 21:58:27,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 224 transitions, 2316 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-07-22 21:58:27,132 INFO L242 Difference]: Finished difference. Result has 157 places, 170 transitions, 1698 flow [2022-07-22 21:58:27,132 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} [2022-07-22 21:58:27,133 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 80 predicate places. [2022-07-22 21:58:27,133 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 170 transitions, 1698 flow [2022-07-22 21:58:27,133 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) [2022-07-22 21:58:27,133 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:27,133 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] [2022-07-22 21:58:27,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 21:58:27,133 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:27,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1443454513, now seen corresponding path program 3 times [2022-07-22 21:58:27,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:27,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298882229] [2022-07-22 21:58:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:27,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:27,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:27,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298882229] [2022-07-22 21:58:27,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298882229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:27,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:27,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:58:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19951992] [2022-07-22 21:58:27,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:27,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:58:27,154 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:27,155 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) [2022-07-22 21:58:27,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:27,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:27,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:27,279 INFO L129 PetriNetUnfolder]: 261/781 cut-off events. [2022-07-22 21:58:27,279 INFO L130 PetriNetUnfolder]: For 5858/5858 co-relation queries the response was YES. [2022-07-22 21:58:27,282 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. [2022-07-22 21:58:27,285 INFO L132 encePairwiseOnDemand]: 77/87 looper letters, 100 selfloop transitions, 98 changer transitions 4/251 dead transitions. [2022-07-22 21:58:27,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 251 transitions, 2992 flow [2022-07-22 21:58:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:58:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:58:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2022-07-22 21:58:27,287 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7879948914431673 [2022-07-22 21:58:27,287 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 617 transitions. [2022-07-22 21:58:27,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 617 transitions. [2022-07-22 21:58:27,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:27,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 617 transitions. [2022-07-22 21:58:27,288 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) [2022-07-22 21:58:27,289 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) [2022-07-22 21:58:27,289 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) [2022-07-22 21:58:27,289 INFO L186 Difference]: Start difference. First operand has 157 places, 170 transitions, 1698 flow. Second operand 9 states and 617 transitions. [2022-07-22 21:58:27,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 251 transitions, 2992 flow [2022-07-22 21:58:27,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 2924 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-22 21:58:27,308 INFO L242 Difference]: Finished difference. Result has 170 places, 212 transitions, 2574 flow [2022-07-22 21:58:27,308 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} [2022-07-22 21:58:27,309 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2022-07-22 21:58:27,309 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 212 transitions, 2574 flow [2022-07-22 21:58:27,309 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) [2022-07-22 21:58:27,309 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:27,309 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] [2022-07-22 21:58:27,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 21:58:27,309 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1098800831, now seen corresponding path program 3 times [2022-07-22 21:58:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512988565] [2022-07-22 21:58:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:27,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:27,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:27,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512988565] [2022-07-22 21:58:27,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512988565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:27,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271021142] [2022-07-22 21:58:27,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:58:27,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:27,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:27,330 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) [2022-07-22 21:58:27,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:58:27,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:58:27,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:27,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:58:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:27,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:27,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271021142] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:27,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:58:27,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-07-22 21:58:27,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024288494] [2022-07-22 21:58:27,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:27,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:27,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:27,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:58:27,445 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:27,446 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) [2022-07-22 21:58:27,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:27,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:27,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:27,596 INFO L129 PetriNetUnfolder]: 280/916 cut-off events. [2022-07-22 21:58:27,597 INFO L130 PetriNetUnfolder]: For 8432/8444 co-relation queries the response was YES. [2022-07-22 21:58:27,601 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. [2022-07-22 21:58:27,604 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 117 selfloop transitions, 99 changer transitions 2/267 dead transitions. [2022-07-22 21:58:27,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 3605 flow [2022-07-22 21:58:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:58:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:58:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 428 transitions. [2022-07-22 21:58:27,605 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8199233716475096 [2022-07-22 21:58:27,605 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 428 transitions. [2022-07-22 21:58:27,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 428 transitions. [2022-07-22 21:58:27,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:27,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 428 transitions. [2022-07-22 21:58:27,606 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) [2022-07-22 21:58:27,607 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) [2022-07-22 21:58:27,607 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) [2022-07-22 21:58:27,607 INFO L186 Difference]: Start difference. First operand has 170 places, 212 transitions, 2574 flow. Second operand 6 states and 428 transitions. [2022-07-22 21:58:27,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 3605 flow [2022-07-22 21:58:27,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 267 transitions, 3491 flow, removed 45 selfloop flow, removed 3 redundant places. [2022-07-22 21:58:27,633 INFO L242 Difference]: Finished difference. Result has 177 places, 229 transitions, 3140 flow [2022-07-22 21:58:27,633 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} [2022-07-22 21:58:27,633 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 100 predicate places. [2022-07-22 21:58:27,633 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 229 transitions, 3140 flow [2022-07-22 21:58:27,633 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) [2022-07-22 21:58:27,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:27,634 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] [2022-07-22 21:58:27,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 21:58:27,850 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 [2022-07-22 21:58:27,850 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:27,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1249889045, now seen corresponding path program 4 times [2022-07-22 21:58:27,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:27,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606406953] [2022-07-22 21:58:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:27,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:27,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606406953] [2022-07-22 21:58:27,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606406953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:27,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:27,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:58:27,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333787219] [2022-07-22 21:58:27,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:27,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:27,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:27,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:27,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:58:27,872 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:27,872 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) [2022-07-22 21:58:27,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:27,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:27,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:28,026 INFO L129 PetriNetUnfolder]: 265/851 cut-off events. [2022-07-22 21:58:28,026 INFO L130 PetriNetUnfolder]: For 9579/9608 co-relation queries the response was YES. [2022-07-22 21:58:28,030 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. [2022-07-22 21:58:28,033 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 150 selfloop transitions, 59 changer transitions 5/263 dead transitions. [2022-07-22 21:58:28,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 263 transitions, 3808 flow [2022-07-22 21:58:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:58:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:58:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2022-07-22 21:58:28,035 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-07-22 21:58:28,035 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2022-07-22 21:58:28,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2022-07-22 21:58:28,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:28,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2022-07-22 21:58:28,036 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) [2022-07-22 21:58:28,037 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) [2022-07-22 21:58:28,037 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) [2022-07-22 21:58:28,037 INFO L186 Difference]: Start difference. First operand has 177 places, 229 transitions, 3140 flow. Second operand 8 states and 554 transitions. [2022-07-22 21:58:28,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 263 transitions, 3808 flow [2022-07-22 21:58:28,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 263 transitions, 3727 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-22 21:58:28,067 INFO L242 Difference]: Finished difference. Result has 181 places, 231 transitions, 3280 flow [2022-07-22 21:58:28,068 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} [2022-07-22 21:58:28,068 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 104 predicate places. [2022-07-22 21:58:28,068 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 3280 flow [2022-07-22 21:58:28,068 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) [2022-07-22 21:58:28,068 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:28,069 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] [2022-07-22 21:58:28,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 21:58:28,069 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1263025475, now seen corresponding path program 5 times [2022-07-22 21:58:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:28,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788829638] [2022-07-22 21:58:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:28,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:28,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788829638] [2022-07-22 21:58:28,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788829638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:28,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:28,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:58:28,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036478183] [2022-07-22 21:58:28,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:28,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:28,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:58:28,096 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:28,096 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) [2022-07-22 21:58:28,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:28,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:28,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:28,251 INFO L129 PetriNetUnfolder]: 246/770 cut-off events. [2022-07-22 21:58:28,251 INFO L130 PetriNetUnfolder]: For 9863/9881 co-relation queries the response was YES. [2022-07-22 21:58:28,254 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. [2022-07-22 21:58:28,257 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 118 selfloop transitions, 92 changer transitions 2/261 dead transitions. [2022-07-22 21:58:28,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 261 transitions, 3873 flow [2022-07-22 21:58:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:58:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:58:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2022-07-22 21:58:28,259 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-07-22 21:58:28,259 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2022-07-22 21:58:28,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2022-07-22 21:58:28,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:28,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2022-07-22 21:58:28,260 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) [2022-07-22 21:58:28,261 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) [2022-07-22 21:58:28,261 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) [2022-07-22 21:58:28,261 INFO L186 Difference]: Start difference. First operand has 181 places, 231 transitions, 3280 flow. Second operand 8 states and 568 transitions. [2022-07-22 21:58:28,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 261 transitions, 3873 flow [2022-07-22 21:58:28,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 261 transitions, 3741 flow, removed 16 selfloop flow, removed 10 redundant places. [2022-07-22 21:58:28,290 INFO L242 Difference]: Finished difference. Result has 176 places, 224 transitions, 3209 flow [2022-07-22 21:58:28,290 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} [2022-07-22 21:58:28,290 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2022-07-22 21:58:28,291 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 224 transitions, 3209 flow [2022-07-22 21:58:28,291 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) [2022-07-22 21:58:28,291 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:28,291 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] [2022-07-22 21:58:28,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 21:58:28,291 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1192658001, now seen corresponding path program 4 times [2022-07-22 21:58:28,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:28,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945394503] [2022-07-22 21:58:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:28,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945394503] [2022-07-22 21:58:28,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945394503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:28,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152208468] [2022-07-22 21:58:28,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:58:28,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:28,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:28,311 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) [2022-07-22 21:58:28,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:58:28,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:58:28,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:28,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:58:28,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:28,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:28,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152208468] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:28,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:58:28,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-07-22 21:58:28,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227481161] [2022-07-22 21:58:28,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:28,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:28,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:58:28,405 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:28,406 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) [2022-07-22 21:58:28,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:28,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:28,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:28,536 INFO L129 PetriNetUnfolder]: 230/716 cut-off events. [2022-07-22 21:58:28,536 INFO L130 PetriNetUnfolder]: For 9860/9860 co-relation queries the response was YES. [2022-07-22 21:58:28,539 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. [2022-07-22 21:58:28,541 INFO L132 encePairwiseOnDemand]: 78/87 looper letters, 132 selfloop transitions, 67 changer transitions 0/248 dead transitions. [2022-07-22 21:58:28,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 248 transitions, 3755 flow [2022-07-22 21:58:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:58:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:58:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2022-07-22 21:58:28,543 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-07-22 21:58:28,543 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2022-07-22 21:58:28,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2022-07-22 21:58:28,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:28,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2022-07-22 21:58:28,544 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) [2022-07-22 21:58:28,544 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) [2022-07-22 21:58:28,544 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) [2022-07-22 21:58:28,544 INFO L186 Difference]: Start difference. First operand has 176 places, 224 transitions, 3209 flow. Second operand 6 states and 426 transitions. [2022-07-22 21:58:28,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 248 transitions, 3755 flow [2022-07-22 21:58:28,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 248 transitions, 3718 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-22 21:58:28,570 INFO L242 Difference]: Finished difference. Result has 182 places, 222 transitions, 3327 flow [2022-07-22 21:58:28,570 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} [2022-07-22 21:58:28,571 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 105 predicate places. [2022-07-22 21:58:28,571 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 3327 flow [2022-07-22 21:58:28,571 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) [2022-07-22 21:58:28,571 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:28,571 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] [2022-07-22 21:58:28,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:28,788 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 [2022-07-22 21:58:28,788 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:28,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:28,789 INFO L85 PathProgramCache]: Analyzing trace with hash -736852561, now seen corresponding path program 5 times [2022-07-22 21:58:28,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:28,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318200229] [2022-07-22 21:58:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:28,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:28,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318200229] [2022-07-22 21:58:28,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318200229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:28,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:28,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:58:28,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327485014] [2022-07-22 21:58:28,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:28,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:28,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:28,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:58:28,807 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:28,808 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) [2022-07-22 21:58:28,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:28,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:28,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:28,923 INFO L129 PetriNetUnfolder]: 225/705 cut-off events. [2022-07-22 21:58:28,923 INFO L130 PetriNetUnfolder]: For 10662/10664 co-relation queries the response was YES. [2022-07-22 21:58:28,926 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. [2022-07-22 21:58:28,929 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 151 selfloop transitions, 33 changer transitions 5/238 dead transitions. [2022-07-22 21:58:28,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 238 transitions, 3750 flow [2022-07-22 21:58:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:58:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:58:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-07-22 21:58:28,930 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-07-22 21:58:28,930 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-07-22 21:58:28,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-07-22 21:58:28,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:28,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-07-22 21:58:28,931 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) [2022-07-22 21:58:28,932 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) [2022-07-22 21:58:28,932 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) [2022-07-22 21:58:28,932 INFO L186 Difference]: Start difference. First operand has 182 places, 222 transitions, 3327 flow. Second operand 7 states and 483 transitions. [2022-07-22 21:58:28,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 238 transitions, 3750 flow [2022-07-22 21:58:28,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 238 transitions, 3701 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-07-22 21:58:28,961 INFO L242 Difference]: Finished difference. Result has 188 places, 217 transitions, 3202 flow [2022-07-22 21:58:28,961 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} [2022-07-22 21:58:28,961 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 111 predicate places. [2022-07-22 21:58:28,961 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 217 transitions, 3202 flow [2022-07-22 21:58:28,962 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) [2022-07-22 21:58:28,962 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:28,962 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] [2022-07-22 21:58:28,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 21:58:28,962 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:28,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:28,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1170896073, now seen corresponding path program 6 times [2022-07-22 21:58:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691915450] [2022-07-22 21:58:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:28,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:28,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:28,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691915450] [2022-07-22 21:58:28,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691915450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:28,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:28,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:58:28,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777256488] [2022-07-22 21:58:28,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:28,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:28,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:28,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:58:28,982 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:28,982 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) [2022-07-22 21:58:28,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:28,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:28,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:29,121 INFO L129 PetriNetUnfolder]: 213/644 cut-off events. [2022-07-22 21:58:29,122 INFO L130 PetriNetUnfolder]: For 10179/10181 co-relation queries the response was YES. [2022-07-22 21:58:29,124 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. [2022-07-22 21:58:29,127 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 124 selfloop transitions, 49 changer transitions 2/224 dead transitions. [2022-07-22 21:58:29,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 224 transitions, 3472 flow [2022-07-22 21:58:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:58:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:58:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-07-22 21:58:29,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2022-07-22 21:58:29,128 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-07-22 21:58:29,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-07-22 21:58:29,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:29,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-07-22 21:58:29,129 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) [2022-07-22 21:58:29,130 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) [2022-07-22 21:58:29,130 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) [2022-07-22 21:58:29,130 INFO L186 Difference]: Start difference. First operand has 188 places, 217 transitions, 3202 flow. Second operand 8 states and 550 transitions. [2022-07-22 21:58:29,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 224 transitions, 3472 flow [2022-07-22 21:58:29,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 224 transitions, 3236 flow, removed 8 selfloop flow, removed 9 redundant places. [2022-07-22 21:58:29,155 INFO L242 Difference]: Finished difference. Result has 182 places, 203 transitions, 2861 flow [2022-07-22 21:58:29,156 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} [2022-07-22 21:58:29,156 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 105 predicate places. [2022-07-22 21:58:29,156 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 2861 flow [2022-07-22 21:58:29,156 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) [2022-07-22 21:58:29,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:29,156 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] [2022-07-22 21:58:29,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 21:58:29,157 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:29,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1496756239, now seen corresponding path program 6 times [2022-07-22 21:58:29,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:29,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100035958] [2022-07-22 21:58:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:29,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:29,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100035958] [2022-07-22 21:58:29,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100035958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:58:29,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:58:29,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:58:29,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860256864] [2022-07-22 21:58:29,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:58:29,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:58:29,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:29,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:58:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:58:29,177 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-22 21:58:29,177 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) [2022-07-22 21:58:29,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:29,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-22 21:58:29,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:29,311 INFO L129 PetriNetUnfolder]: 196/570 cut-off events. [2022-07-22 21:58:29,311 INFO L130 PetriNetUnfolder]: For 8353/8355 co-relation queries the response was YES. [2022-07-22 21:58:29,314 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. [2022-07-22 21:58:29,316 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 109 selfloop transitions, 45 changer transitions 3/206 dead transitions. [2022-07-22 21:58:29,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 206 transitions, 3042 flow [2022-07-22 21:58:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:58:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:58:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2022-07-22 21:58:29,317 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2022-07-22 21:58:29,317 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2022-07-22 21:58:29,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2022-07-22 21:58:29,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:29,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2022-07-22 21:58:29,318 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) [2022-07-22 21:58:29,319 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) [2022-07-22 21:58:29,319 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) [2022-07-22 21:58:29,319 INFO L186 Difference]: Start difference. First operand has 182 places, 203 transitions, 2861 flow. Second operand 7 states and 480 transitions. [2022-07-22 21:58:29,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 206 transitions, 3042 flow [2022-07-22 21:58:29,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 206 transitions, 2918 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-22 21:58:29,340 INFO L242 Difference]: Finished difference. Result has 170 places, 189 transitions, 2602 flow [2022-07-22 21:58:29,340 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} [2022-07-22 21:58:29,340 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2022-07-22 21:58:29,340 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 189 transitions, 2602 flow [2022-07-22 21:58:29,340 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) [2022-07-22 21:58:29,341 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:29,341 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] [2022-07-22 21:58:29,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-22 21:58:29,341 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008755, now seen corresponding path program 1 times [2022-07-22 21:58:29,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:29,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066402319] [2022-07-22 21:58:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:29,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:29,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066402319] [2022-07-22 21:58:29,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066402319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:29,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248305009] [2022-07-22 21:58:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:29,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:29,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:29,473 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) [2022-07-22 21:58:29,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:58:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:58:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:29,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:30,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248305009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:30,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:30,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:58:30,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999606848] [2022-07-22 21:58:30,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:30,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:58:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:58:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:58:30,257 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:58:30,258 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) [2022-07-22 21:58:30,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:30,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:58:30,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:39,084 INFO L129 PetriNetUnfolder]: 972/2287 cut-off events. [2022-07-22 21:58:39,084 INFO L130 PetriNetUnfolder]: For 31601/31601 co-relation queries the response was YES. [2022-07-22 21:58:39,095 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. [2022-07-22 21:58:39,109 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 247 selfloop transitions, 857 changer transitions 17/1160 dead transitions. [2022-07-22 21:58:39,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1160 transitions, 16998 flow [2022-07-22 21:58:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-07-22 21:58:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2022-07-22 21:58:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2022-07-22 21:58:39,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2022-07-22 21:58:39,119 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2022-07-22 21:58:39,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2022-07-22 21:58:39,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:39,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2022-07-22 21:58:39,135 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) [2022-07-22 21:58:39,153 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) [2022-07-22 21:58:39,156 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) [2022-07-22 21:58:39,157 INFO L186 Difference]: Start difference. First operand has 170 places, 189 transitions, 2602 flow. Second operand 224 states and 11784 transitions. [2022-07-22 21:58:39,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1160 transitions, 16998 flow [2022-07-22 21:58:39,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1160 transitions, 16169 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-22 21:58:39,228 INFO L242 Difference]: Finished difference. Result has 439 places, 991 transitions, 15237 flow [2022-07-22 21:58:39,229 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} [2022-07-22 21:58:39,229 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 362 predicate places. [2022-07-22 21:58:39,229 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 991 transitions, 15237 flow [2022-07-22 21:58:39,230 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) [2022-07-22 21:58:39,230 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:39,230 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] [2022-07-22 21:58:39,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 21:58:39,443 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 [2022-07-22 21:58:39,443 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash -950751903, now seen corresponding path program 2 times [2022-07-22 21:58:39,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:39,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442379275] [2022-07-22 21:58:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:39,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:39,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:39,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442379275] [2022-07-22 21:58:39,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442379275] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:39,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563599252] [2022-07-22 21:58:39,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:58:39,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:39,592 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) [2022-07-22 21:58:39,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:58:39,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:58:39,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:39,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:58:39,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:39,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:40,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563599252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:40,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:40,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:58:40,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382253075] [2022-07-22 21:58:40,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:40,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:58:40,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:40,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:58:40,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:58:40,393 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:58:40,394 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) [2022-07-22 21:58:40,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:40,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:58:40,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:43,191 INFO L129 PetriNetUnfolder]: 1106/2984 cut-off events. [2022-07-22 21:58:43,192 INFO L130 PetriNetUnfolder]: For 129885/129885 co-relation queries the response was YES. [2022-07-22 21:58:43,215 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. [2022-07-22 21:58:43,234 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 360 selfloop transitions, 764 changer transitions 45/1208 dead transitions. [2022-07-22 21:58:43,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1208 transitions, 22147 flow [2022-07-22 21:58:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 21:58:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-22 21:58:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2022-07-22 21:58:43,237 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2022-07-22 21:58:43,237 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2022-07-22 21:58:43,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2022-07-22 21:58:43,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:43,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2022-07-22 21:58:43,242 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) [2022-07-22 21:58:43,248 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) [2022-07-22 21:58:43,249 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) [2022-07-22 21:58:43,249 INFO L186 Difference]: Start difference. First operand has 439 places, 991 transitions, 15237 flow. Second operand 64 states and 3489 transitions. [2022-07-22 21:58:43,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1208 transitions, 22147 flow [2022-07-22 21:58:43,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1208 transitions, 20684 flow, removed 458 selfloop flow, removed 15 redundant places. [2022-07-22 21:58:43,741 INFO L242 Difference]: Finished difference. Result has 499 places, 1037 transitions, 16667 flow [2022-07-22 21:58:43,742 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} [2022-07-22 21:58:43,742 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 422 predicate places. [2022-07-22 21:58:43,743 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1037 transitions, 16667 flow [2022-07-22 21:58:43,743 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) [2022-07-22 21:58:43,743 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:43,743 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] [2022-07-22 21:58:43,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 21:58:43,959 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 [2022-07-22 21:58:43,959 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1414684533, now seen corresponding path program 3 times [2022-07-22 21:58:43,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:43,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385646363] [2022-07-22 21:58:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:43,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:44,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:44,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385646363] [2022-07-22 21:58:44,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385646363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:44,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568491445] [2022-07-22 21:58:44,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:58:44,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:44,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:44,122 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) [2022-07-22 21:58:44,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:58:44,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:58:44,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:44,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:58:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:44,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:44,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568491445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:44,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:44,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:58:44,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707003196] [2022-07-22 21:58:44,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:44,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:58:44,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:44,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:58:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:58:44,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:58:44,861 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) [2022-07-22 21:58:44,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:44,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:58:44,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:47,525 INFO L129 PetriNetUnfolder]: 1087/2957 cut-off events. [2022-07-22 21:58:47,526 INFO L130 PetriNetUnfolder]: For 149702/149702 co-relation queries the response was YES. [2022-07-22 21:58:47,549 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. [2022-07-22 21:58:47,568 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 339 selfloop transitions, 776 changer transitions 31/1185 dead transitions. [2022-07-22 21:58:47,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 1185 transitions, 22459 flow [2022-07-22 21:58:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-22 21:58:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-22 21:58:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2022-07-22 21:58:47,571 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2022-07-22 21:58:47,571 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2022-07-22 21:58:47,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2022-07-22 21:58:47,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:47,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2022-07-22 21:58:47,576 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) [2022-07-22 21:58:47,580 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) [2022-07-22 21:58:47,581 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) [2022-07-22 21:58:47,581 INFO L186 Difference]: Start difference. First operand has 499 places, 1037 transitions, 16667 flow. Second operand 66 states and 3577 transitions. [2022-07-22 21:58:47,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 1185 transitions, 22459 flow [2022-07-22 21:58:48,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1185 transitions, 20689 flow, removed 165 selfloop flow, removed 43 redundant places. [2022-07-22 21:58:48,106 INFO L242 Difference]: Finished difference. Result has 529 places, 1054 transitions, 17180 flow [2022-07-22 21:58:48,107 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} [2022-07-22 21:58:48,107 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 452 predicate places. [2022-07-22 21:58:48,108 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 1054 transitions, 17180 flow [2022-07-22 21:58:48,108 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) [2022-07-22 21:58:48,108 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:48,108 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] [2022-07-22 21:58:48,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:48,325 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 [2022-07-22 21:58:48,326 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1843164369, now seen corresponding path program 4 times [2022-07-22 21:58:48,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:48,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323067295] [2022-07-22 21:58:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:48,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:48,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323067295] [2022-07-22 21:58:48,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323067295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:48,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259421974] [2022-07-22 21:58:48,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:58:48,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:48,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:48,459 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) [2022-07-22 21:58:48,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:58:48,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:58:48,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:48,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 21:58:48,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:48,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:49,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259421974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:49,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:49,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-22 21:58:49,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169643915] [2022-07-22 21:58:49,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:49,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 21:58:49,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 21:58:49,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 21:58:49,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:58:49,116 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) [2022-07-22 21:58:49,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:49,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:58:49,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:50,849 INFO L129 PetriNetUnfolder]: 1083/3028 cut-off events. [2022-07-22 21:58:50,850 INFO L130 PetriNetUnfolder]: For 161827/161827 co-relation queries the response was YES. [2022-07-22 21:58:50,878 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. [2022-07-22 21:58:50,898 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 654 selfloop transitions, 463 changer transitions 19/1175 dead transitions. [2022-07-22 21:58:50,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1175 transitions, 22406 flow [2022-07-22 21:58:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 21:58:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-22 21:58:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2064 transitions. [2022-07-22 21:58:50,901 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.641192917054986 [2022-07-22 21:58:50,901 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2064 transitions. [2022-07-22 21:58:50,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2064 transitions. [2022-07-22 21:58:50,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:50,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2064 transitions. [2022-07-22 21:58:50,904 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) [2022-07-22 21:58:50,906 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) [2022-07-22 21:58:50,906 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) [2022-07-22 21:58:50,906 INFO L186 Difference]: Start difference. First operand has 529 places, 1054 transitions, 17180 flow. Second operand 37 states and 2064 transitions. [2022-07-22 21:58:50,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1175 transitions, 22406 flow [2022-07-22 21:58:51,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1175 transitions, 20699 flow, removed 134 selfloop flow, removed 51 redundant places. [2022-07-22 21:58:51,606 INFO L242 Difference]: Finished difference. Result has 511 places, 1069 transitions, 16845 flow [2022-07-22 21:58:51,607 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} [2022-07-22 21:58:51,607 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 434 predicate places. [2022-07-22 21:58:51,607 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1069 transitions, 16845 flow [2022-07-22 21:58:51,608 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) [2022-07-22 21:58:51,608 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:51,608 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] [2022-07-22 21:58:51,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 21:58:51,825 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 [2022-07-22 21:58:51,825 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash -559814149, now seen corresponding path program 5 times [2022-07-22 21:58:51,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:51,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350776815] [2022-07-22 21:58:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:51,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:51,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350776815] [2022-07-22 21:58:51,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350776815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349238344] [2022-07-22 21:58:51,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:58:51,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:51,983 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) [2022-07-22 21:58:51,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:58:52,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:58:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 21:58:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:52,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:52,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349238344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:52,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:52,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-22 21:58:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051984840] [2022-07-22 21:58:52,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:52,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 21:58:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:52,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 21:58:52,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 21:58:52,569 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:58:52,570 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) [2022-07-22 21:58:52,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:52,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:58:52,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:54,545 INFO L129 PetriNetUnfolder]: 1141/3135 cut-off events. [2022-07-22 21:58:54,545 INFO L130 PetriNetUnfolder]: For 158536/158536 co-relation queries the response was YES. [2022-07-22 21:58:54,573 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. [2022-07-22 21:58:54,592 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 316 selfloop transitions, 905 changer transitions 21/1281 dead transitions. [2022-07-22 21:58:54,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1281 transitions, 23466 flow [2022-07-22 21:58:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 21:58:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-22 21:58:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2440 transitions. [2022-07-22 21:58:54,596 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6232439335887612 [2022-07-22 21:58:54,596 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2440 transitions. [2022-07-22 21:58:54,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2440 transitions. [2022-07-22 21:58:54,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:54,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2440 transitions. [2022-07-22 21:58:54,599 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) [2022-07-22 21:58:54,602 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) [2022-07-22 21:58:54,602 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) [2022-07-22 21:58:54,602 INFO L186 Difference]: Start difference. First operand has 511 places, 1069 transitions, 16845 flow. Second operand 45 states and 2440 transitions. [2022-07-22 21:58:54,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1281 transitions, 23466 flow [2022-07-22 21:58:55,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1281 transitions, 22655 flow, removed 37 selfloop flow, removed 21 redundant places. [2022-07-22 21:58:55,252 INFO L242 Difference]: Finished difference. Result has 550 places, 1182 transitions, 20689 flow [2022-07-22 21:58:55,253 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} [2022-07-22 21:58:55,253 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 473 predicate places. [2022-07-22 21:58:55,253 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1182 transitions, 20689 flow [2022-07-22 21:58:55,254 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) [2022-07-22 21:58:55,254 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:55,254 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] [2022-07-22 21:58:55,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:55,471 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 [2022-07-22 21:58:55,471 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash 619738599, now seen corresponding path program 6 times [2022-07-22 21:58:55,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750593290] [2022-07-22 21:58:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:55,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:55,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750593290] [2022-07-22 21:58:55,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750593290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:55,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710224231] [2022-07-22 21:58:55,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:58:55,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:55,638 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) [2022-07-22 21:58:55,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:58:55,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-22 21:58:55,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:55,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:58:55,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:55,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:56,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710224231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:56,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:56,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:58:56,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517115418] [2022-07-22 21:58:56,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:56,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:58:56,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:58:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:58:56,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:58:56,351 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) [2022-07-22 21:58:56,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:56,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:58:56,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:59,105 INFO L129 PetriNetUnfolder]: 1186/3337 cut-off events. [2022-07-22 21:58:59,106 INFO L130 PetriNetUnfolder]: For 183553/183553 co-relation queries the response was YES. [2022-07-22 21:58:59,141 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. [2022-07-22 21:58:59,161 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 447 selfloop transitions, 854 changer transitions 50/1390 dead transitions. [2022-07-22 21:58:59,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1390 transitions, 29071 flow [2022-07-22 21:58:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 21:58:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-22 21:58:59,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3349 transitions. [2022-07-22 21:58:59,165 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6310533257961183 [2022-07-22 21:58:59,165 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3349 transitions. [2022-07-22 21:58:59,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3349 transitions. [2022-07-22 21:58:59,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:59,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3349 transitions. [2022-07-22 21:58:59,169 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) [2022-07-22 21:58:59,172 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) [2022-07-22 21:58:59,173 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) [2022-07-22 21:58:59,173 INFO L186 Difference]: Start difference. First operand has 550 places, 1182 transitions, 20689 flow. Second operand 61 states and 3349 transitions. [2022-07-22 21:58:59,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1390 transitions, 29071 flow [2022-07-22 21:59:00,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1390 transitions, 28528 flow, removed 176 selfloop flow, removed 15 redundant places. [2022-07-22 21:59:00,089 INFO L242 Difference]: Finished difference. Result has 609 places, 1216 transitions, 23245 flow [2022-07-22 21:59:00,090 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} [2022-07-22 21:59:00,091 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 532 predicate places. [2022-07-22 21:59:00,091 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1216 transitions, 23245 flow [2022-07-22 21:59:00,091 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) [2022-07-22 21:59:00,091 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:00,092 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] [2022-07-22 21:59:00,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-22 21:59:00,308 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 [2022-07-22 21:59:00,308 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash 733196829, now seen corresponding path program 7 times [2022-07-22 21:59:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:00,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513418620] [2022-07-22 21:59:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:00,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:00,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:00,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513418620] [2022-07-22 21:59:00,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513418620] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:00,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426464105] [2022-07-22 21:59:00,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:59:00,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:00,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:00,436 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) [2022-07-22 21:59:00,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:59:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:59:00,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:00,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:01,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426464105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:01,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:01,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:59:01,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074044927] [2022-07-22 21:59:01,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:01,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:59:01,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:59:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:59:01,162 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:59:01,163 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) [2022-07-22 21:59:01,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:01,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:59:01,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:04,747 INFO L129 PetriNetUnfolder]: 1221/3437 cut-off events. [2022-07-22 21:59:04,747 INFO L130 PetriNetUnfolder]: For 195893/195893 co-relation queries the response was YES. [2022-07-22 21:59:04,804 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. [2022-07-22 21:59:04,825 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 354 selfloop transitions, 958 changer transitions 27/1378 dead transitions. [2022-07-22 21:59:04,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 1378 transitions, 30151 flow [2022-07-22 21:59:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-22 21:59:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-22 21:59:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5100 transitions. [2022-07-22 21:59:04,830 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.617059891107078 [2022-07-22 21:59:04,830 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5100 transitions. [2022-07-22 21:59:04,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5100 transitions. [2022-07-22 21:59:04,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:04,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5100 transitions. [2022-07-22 21:59:04,836 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) [2022-07-22 21:59:04,841 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) [2022-07-22 21:59:04,842 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) [2022-07-22 21:59:04,842 INFO L186 Difference]: Start difference. First operand has 609 places, 1216 transitions, 23245 flow. Second operand 95 states and 5100 transitions. [2022-07-22 21:59:04,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 1378 transitions, 30151 flow [2022-07-22 21:59:05,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1378 transitions, 29144 flow, removed 70 selfloop flow, removed 36 redundant places. [2022-07-22 21:59:05,850 INFO L242 Difference]: Finished difference. Result has 666 places, 1253 transitions, 25416 flow [2022-07-22 21:59:05,851 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} [2022-07-22 21:59:05,851 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 589 predicate places. [2022-07-22 21:59:05,852 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 1253 transitions, 25416 flow [2022-07-22 21:59:05,852 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) [2022-07-22 21:59:05,852 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:05,852 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] [2022-07-22 21:59:05,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:59:06,067 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 [2022-07-22 21:59:06,067 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash 65432667, now seen corresponding path program 8 times [2022-07-22 21:59:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:06,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083190294] [2022-07-22 21:59:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:06,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:06,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:06,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083190294] [2022-07-22 21:59:06,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083190294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:06,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254555068] [2022-07-22 21:59:06,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:59:06,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:06,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:06,234 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) [2022-07-22 21:59:06,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:59:06,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:59:06,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:59:06,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:06,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:06,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254555068] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:06,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:06,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:59:06,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894156147] [2022-07-22 21:59:06,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:06,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:59:06,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:06,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:59:06,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:59:06,928 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:59:06,929 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) [2022-07-22 21:59:06,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:06,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:59:06,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:09,609 INFO L129 PetriNetUnfolder]: 1364/3834 cut-off events. [2022-07-22 21:59:09,610 INFO L130 PetriNetUnfolder]: For 217236/217236 co-relation queries the response was YES. [2022-07-22 21:59:09,652 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. [2022-07-22 21:59:09,674 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 292 selfloop transitions, 1283 changer transitions 19/1633 dead transitions. [2022-07-22 21:59:09,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1633 transitions, 36148 flow [2022-07-22 21:59:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-22 21:59:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-22 21:59:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3187 transitions. [2022-07-22 21:59:09,678 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6105363984674329 [2022-07-22 21:59:09,678 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3187 transitions. [2022-07-22 21:59:09,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3187 transitions. [2022-07-22 21:59:09,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:09,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3187 transitions. [2022-07-22 21:59:09,681 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) [2022-07-22 21:59:09,684 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) [2022-07-22 21:59:09,685 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) [2022-07-22 21:59:09,685 INFO L186 Difference]: Start difference. First operand has 666 places, 1253 transitions, 25416 flow. Second operand 60 states and 3187 transitions. [2022-07-22 21:59:09,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1633 transitions, 36148 flow [2022-07-22 21:59:10,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1633 transitions, 34246 flow, removed 44 selfloop flow, removed 72 redundant places. [2022-07-22 21:59:10,809 INFO L242 Difference]: Finished difference. Result has 672 places, 1557 transitions, 33902 flow [2022-07-22 21:59:10,810 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} [2022-07-22 21:59:10,810 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 595 predicate places. [2022-07-22 21:59:10,810 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1557 transitions, 33902 flow [2022-07-22 21:59:10,811 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) [2022-07-22 21:59:10,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:10,811 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] [2022-07-22 21:59:10,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:59:11,027 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 [2022-07-22 21:59:11,027 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:11,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1800442661, now seen corresponding path program 9 times [2022-07-22 21:59:11,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:11,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297909670] [2022-07-22 21:59:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:11,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:11,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297909670] [2022-07-22 21:59:11,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297909670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676144416] [2022-07-22 21:59:11,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:59:11,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:11,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:11,156 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) [2022-07-22 21:59:11,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:59:11,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:59:11,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:11,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:59:11,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:11,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:11,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676144416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:11,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:11,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:59:11,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172363009] [2022-07-22 21:59:11,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:11,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:59:11,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:11,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:59:11,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:59:11,776 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:59:11,777 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) [2022-07-22 21:59:11,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:11,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:59:11,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:17,368 INFO L129 PetriNetUnfolder]: 1393/3839 cut-off events. [2022-07-22 21:59:17,368 INFO L130 PetriNetUnfolder]: For 271221/271221 co-relation queries the response was YES. [2022-07-22 21:59:17,418 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. [2022-07-22 21:59:17,441 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 382 selfloop transitions, 1278 changer transitions 28/1727 dead transitions. [2022-07-22 21:59:17,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 1727 transitions, 42932 flow [2022-07-22 21:59:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-07-22 21:59:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-07-22 21:59:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7704 transitions. [2022-07-22 21:59:17,446 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6065186584789797 [2022-07-22 21:59:17,447 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7704 transitions. [2022-07-22 21:59:17,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7704 transitions. [2022-07-22 21:59:17,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:17,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7704 transitions. [2022-07-22 21:59:17,455 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) [2022-07-22 21:59:17,461 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) [2022-07-22 21:59:17,462 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) [2022-07-22 21:59:17,462 INFO L186 Difference]: Start difference. First operand has 672 places, 1557 transitions, 33902 flow. Second operand 146 states and 7704 transitions. [2022-07-22 21:59:17,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 1727 transitions, 42932 flow [2022-07-22 21:59:19,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 1727 transitions, 41156 flow, removed 779 selfloop flow, removed 19 redundant places. [2022-07-22 21:59:19,411 INFO L242 Difference]: Finished difference. Result has 813 places, 1575 transitions, 36645 flow [2022-07-22 21:59:19,413 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} [2022-07-22 21:59:19,413 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 736 predicate places. [2022-07-22 21:59:19,413 INFO L495 AbstractCegarLoop]: Abstraction has has 813 places, 1575 transitions, 36645 flow [2022-07-22 21:59:19,414 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) [2022-07-22 21:59:19,414 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:19,414 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] [2022-07-22 21:59:19,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 21:59:19,627 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 [2022-07-22 21:59:19,628 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash 959815931, now seen corresponding path program 10 times [2022-07-22 21:59:19,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:19,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800899356] [2022-07-22 21:59:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:19,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:19,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800899356] [2022-07-22 21:59:19,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800899356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:19,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584617788] [2022-07-22 21:59:19,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:59:19,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:19,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:19,768 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) [2022-07-22 21:59:19,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:59:19,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:59:19,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:19,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 21:59:19,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:20,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:20,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584617788] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:20,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:20,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-22 21:59:20,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364419270] [2022-07-22 21:59:20,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:20,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 21:59:20,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 21:59:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 21:59:20,432 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:59:20,432 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) [2022-07-22 21:59:20,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:20,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:59:20,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:24,618 INFO L129 PetriNetUnfolder]: 1473/4010 cut-off events. [2022-07-22 21:59:24,618 INFO L130 PetriNetUnfolder]: For 246913/246913 co-relation queries the response was YES. [2022-07-22 21:59:24,676 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. [2022-07-22 21:59:24,700 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 775 selfloop transitions, 1007 changer transitions 13/1834 dead transitions. [2022-07-22 21:59:24,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 903 places, 1834 transitions, 46444 flow [2022-07-22 21:59:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-22 21:59:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-07-22 21:59:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5376 transitions. [2022-07-22 21:59:24,724 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6118129054284739 [2022-07-22 21:59:24,724 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5376 transitions. [2022-07-22 21:59:24,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5376 transitions. [2022-07-22 21:59:24,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:24,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5376 transitions. [2022-07-22 21:59:24,730 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) [2022-07-22 21:59:24,734 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) [2022-07-22 21:59:24,735 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) [2022-07-22 21:59:24,735 INFO L186 Difference]: Start difference. First operand has 813 places, 1575 transitions, 36645 flow. Second operand 101 states and 5376 transitions. [2022-07-22 21:59:24,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 903 places, 1834 transitions, 46444 flow [2022-07-22 21:59:26,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1834 transitions, 42870 flow, removed 540 selfloop flow, removed 133 redundant places. [2022-07-22 21:59:26,551 INFO L242 Difference]: Finished difference. Result has 788 places, 1713 transitions, 39246 flow [2022-07-22 21:59:26,553 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} [2022-07-22 21:59:26,553 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 711 predicate places. [2022-07-22 21:59:26,553 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 1713 transitions, 39246 flow [2022-07-22 21:59:26,553 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) [2022-07-22 21:59:26,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:26,554 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] [2022-07-22 21:59:26,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:59:26,770 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 [2022-07-22 21:59:26,770 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash -612854579, now seen corresponding path program 11 times [2022-07-22 21:59:26,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:26,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218961178] [2022-07-22 21:59:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:26,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:26,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:26,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218961178] [2022-07-22 21:59:26,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218961178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:26,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408969055] [2022-07-22 21:59:26,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:59:26,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:26,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:26,898 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) [2022-07-22 21:59:26,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:59:26,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:59:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:59:26,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:27,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:27,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408969055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:27,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:27,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:59:27,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314003788] [2022-07-22 21:59:27,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:27,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:59:27,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:59:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:59:27,570 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:59:27,571 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) [2022-07-22 21:59:27,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:27,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:59:27,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:33,411 INFO L129 PetriNetUnfolder]: 1471/4032 cut-off events. [2022-07-22 21:59:33,411 INFO L130 PetriNetUnfolder]: For 125121/125121 co-relation queries the response was YES. [2022-07-22 21:59:33,462 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. [2022-07-22 21:59:33,486 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 439 selfloop transitions, 1376 changer transitions 40/1894 dead transitions. [2022-07-22 21:59:33,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 1894 transitions, 46559 flow [2022-07-22 21:59:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-07-22 21:59:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2022-07-22 21:59:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 7892 transitions. [2022-07-22 21:59:33,491 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.608809689115174 [2022-07-22 21:59:33,491 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 7892 transitions. [2022-07-22 21:59:33,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 7892 transitions. [2022-07-22 21:59:33,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:33,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 7892 transitions. [2022-07-22 21:59:33,498 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) [2022-07-22 21:59:33,505 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) [2022-07-22 21:59:33,506 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) [2022-07-22 21:59:33,506 INFO L186 Difference]: Start difference. First operand has 788 places, 1713 transitions, 39246 flow. Second operand 149 states and 7892 transitions. [2022-07-22 21:59:33,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 1894 transitions, 46559 flow [2022-07-22 21:59:34,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 905 places, 1894 transitions, 45317 flow, removed 56 selfloop flow, removed 28 redundant places. [2022-07-22 21:59:34,858 INFO L242 Difference]: Finished difference. Result has 916 places, 1709 transitions, 40902 flow [2022-07-22 21:59:34,859 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} [2022-07-22 21:59:34,860 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 839 predicate places. [2022-07-22 21:59:34,860 INFO L495 AbstractCegarLoop]: Abstraction has has 916 places, 1709 transitions, 40902 flow [2022-07-22 21:59:34,860 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) [2022-07-22 21:59:34,860 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:34,860 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] [2022-07-22 21:59:34,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-22 21:59:35,068 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 [2022-07-22 21:59:35,068 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:35,075 INFO L85 PathProgramCache]: Analyzing trace with hash -446656927, now seen corresponding path program 12 times [2022-07-22 21:59:35,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:35,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232497245] [2022-07-22 21:59:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:35,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:35,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:35,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232497245] [2022-07-22 21:59:35,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232497245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:35,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746494668] [2022-07-22 21:59:35,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:59:35,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:35,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:35,246 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) [2022-07-22 21:59:35,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:59:35,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-22 21:59:35,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:35,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 21:59:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:35,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:35,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746494668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:35,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:35,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-22 21:59:35,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223099846] [2022-07-22 21:59:35,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:35,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 21:59:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 21:59:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 21:59:35,793 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:59:35,793 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) [2022-07-22 21:59:35,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:35,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:59:35,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:39,049 INFO L129 PetriNetUnfolder]: 1530/4318 cut-off events. [2022-07-22 21:59:39,050 INFO L130 PetriNetUnfolder]: For 140902/140902 co-relation queries the response was YES. [2022-07-22 21:59:39,110 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. [2022-07-22 21:59:39,134 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 436 selfloop transitions, 1282 changer transitions 73/1830 dead transitions. [2022-07-22 21:59:39,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 1830 transitions, 47280 flow [2022-07-22 21:59:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 21:59:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-22 21:59:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2906 transitions. [2022-07-22 21:59:39,136 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6185610898254577 [2022-07-22 21:59:39,136 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2906 transitions. [2022-07-22 21:59:39,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2906 transitions. [2022-07-22 21:59:39,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:39,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2906 transitions. [2022-07-22 21:59:39,139 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) [2022-07-22 21:59:39,141 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) [2022-07-22 21:59:39,141 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) [2022-07-22 21:59:39,141 INFO L186 Difference]: Start difference. First operand has 916 places, 1709 transitions, 40902 flow. Second operand 54 states and 2906 transitions. [2022-07-22 21:59:39,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 1830 transitions, 47280 flow [2022-07-22 21:59:40,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 1830 transitions, 45375 flow, removed 35 selfloop flow, removed 129 redundant places. [2022-07-22 21:59:40,626 INFO L242 Difference]: Finished difference. Result has 832 places, 1694 transitions, 41282 flow [2022-07-22 21:59:40,627 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} [2022-07-22 21:59:40,627 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 755 predicate places. [2022-07-22 21:59:40,627 INFO L495 AbstractCegarLoop]: Abstraction has has 832 places, 1694 transitions, 41282 flow [2022-07-22 21:59:40,628 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) [2022-07-22 21:59:40,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:40,628 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] [2022-07-22 21:59:40,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 21:59:40,843 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 [2022-07-22 21:59:40,843 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash 8615431, now seen corresponding path program 13 times [2022-07-22 21:59:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:40,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923259807] [2022-07-22 21:59:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:40,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:41,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923259807] [2022-07-22 21:59:41,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923259807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107231236] [2022-07-22 21:59:41,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:59:41,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:41,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:41,032 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) [2022-07-22 21:59:41,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 21:59:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:41,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:59:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:41,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:41,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107231236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:41,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:41,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:59:41,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135405128] [2022-07-22 21:59:41,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:41,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:59:41,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:59:41,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:59:41,705 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:59:41,705 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) [2022-07-22 21:59:41,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:41,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:59:41,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:49,033 INFO L129 PetriNetUnfolder]: 1412/3887 cut-off events. [2022-07-22 21:59:49,034 INFO L130 PetriNetUnfolder]: For 134181/134181 co-relation queries the response was YES. [2022-07-22 21:59:49,170 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. [2022-07-22 21:59:49,193 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 428 selfloop transitions, 1367 changer transitions 35/1869 dead transitions. [2022-07-22 21:59:49,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1010 places, 1869 transitions, 48317 flow [2022-07-22 21:59:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-07-22 21:59:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2022-07-22 21:59:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 10038 transitions. [2022-07-22 21:59:49,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6072595281306715 [2022-07-22 21:59:49,199 INFO L72 ComplementDD]: Start complementDD. Operand 190 states and 10038 transitions. [2022-07-22 21:59:49,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 190 states and 10038 transitions. [2022-07-22 21:59:49,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:49,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 190 states and 10038 transitions. [2022-07-22 21:59:49,206 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) [2022-07-22 21:59:49,214 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) [2022-07-22 21:59:49,215 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) [2022-07-22 21:59:49,215 INFO L186 Difference]: Start difference. First operand has 832 places, 1694 transitions, 41282 flow. Second operand 190 states and 10038 transitions. [2022-07-22 21:59:49,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1010 places, 1869 transitions, 48317 flow [2022-07-22 21:59:50,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 958 places, 1869 transitions, 45397 flow, removed 80 selfloop flow, removed 52 redundant places. [2022-07-22 21:59:50,434 INFO L242 Difference]: Finished difference. Result has 966 places, 1677 transitions, 40978 flow [2022-07-22 21:59:50,435 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} [2022-07-22 21:59:50,436 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 889 predicate places. [2022-07-22 21:59:50,436 INFO L495 AbstractCegarLoop]: Abstraction has has 966 places, 1677 transitions, 40978 flow [2022-07-22 21:59:50,436 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) [2022-07-22 21:59:50,436 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:50,436 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] [2022-07-22 21:59:50,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-22 21:59:50,648 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 [2022-07-22 21:59:50,648 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:50,649 INFO L85 PathProgramCache]: Analyzing trace with hash 739671021, now seen corresponding path program 14 times [2022-07-22 21:59:50,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:50,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372070567] [2022-07-22 21:59:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:50,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:50,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:50,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372070567] [2022-07-22 21:59:50,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372070567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:50,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473545241] [2022-07-22 21:59:50,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:59:50,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:50,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:50,795 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) [2022-07-22 21:59:50,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 21:59:50,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:59:50,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:50,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:59:50,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:51,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:51,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473545241] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:51,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:51,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:59:51,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453301386] [2022-07-22 21:59:51,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:51,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:59:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:59:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:59:51,431 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:59:51,432 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) [2022-07-22 21:59:51,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:51,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:59:51,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:54,176 INFO L129 PetriNetUnfolder]: 1404/3801 cut-off events. [2022-07-22 21:59:54,177 INFO L130 PetriNetUnfolder]: For 127173/127173 co-relation queries the response was YES. [2022-07-22 21:59:54,230 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. [2022-07-22 21:59:54,367 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 286 selfloop transitions, 1381 changer transitions 21/1727 dead transitions. [2022-07-22 21:59:54,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 1727 transitions, 45280 flow [2022-07-22 21:59:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-22 21:59:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-22 21:59:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3074 transitions. [2022-07-22 21:59:54,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2022-07-22 21:59:54,369 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3074 transitions. [2022-07-22 21:59:54,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3074 transitions. [2022-07-22 21:59:54,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:54,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3074 transitions. [2022-07-22 21:59:54,372 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) [2022-07-22 21:59:54,374 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) [2022-07-22 21:59:54,375 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) [2022-07-22 21:59:54,375 INFO L186 Difference]: Start difference. First operand has 966 places, 1677 transitions, 40978 flow. Second operand 58 states and 3074 transitions. [2022-07-22 21:59:54,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 1727 transitions, 45280 flow [2022-07-22 21:59:55,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 1727 transitions, 42946 flow, removed 19 selfloop flow, removed 168 redundant places. [2022-07-22 21:59:55,594 INFO L242 Difference]: Finished difference. Result has 840 places, 1661 transitions, 41061 flow [2022-07-22 21:59:55,596 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} [2022-07-22 21:59:55,596 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 763 predicate places. [2022-07-22 21:59:55,596 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 1661 transitions, 41061 flow [2022-07-22 21:59:55,597 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) [2022-07-22 21:59:55,597 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:55,597 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] [2022-07-22 21:59:55,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 21:59:55,810 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 [2022-07-22 21:59:55,811 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:59:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1010313819, now seen corresponding path program 15 times [2022-07-22 21:59:55,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:55,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912672670] [2022-07-22 21:59:55,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:55,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:55,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:55,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912672670] [2022-07-22 21:59:55,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912672670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:55,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121279092] [2022-07-22 21:59:55,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:59:55,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:55,969 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) [2022-07-22 21:59:56,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 21:59:56,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:59:56,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:56,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:59:56,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:56,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:59:56,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121279092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:59:56,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:59:56,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 21:59:56,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274646954] [2022-07-22 21:59:56,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:59:56,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:59:56,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:59:56,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:59:56,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:59:56,565 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 21:59:56,566 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) [2022-07-22 21:59:56,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:59:56,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 21:59:56,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:00,052 INFO L129 PetriNetUnfolder]: 1400/3793 cut-off events. [2022-07-22 22:00:00,052 INFO L130 PetriNetUnfolder]: For 128224/128224 co-relation queries the response was YES. [2022-07-22 22:00:00,096 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. [2022-07-22 22:00:00,119 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 282 selfloop transitions, 1398 changer transitions 9/1728 dead transitions. [2022-07-22 22:00:00,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 893 places, 1728 transitions, 45650 flow [2022-07-22 22:00:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-22 22:00:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-22 22:00:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3177 transitions. [2022-07-22 22:00:00,126 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6086206896551725 [2022-07-22 22:00:00,126 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3177 transitions. [2022-07-22 22:00:00,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3177 transitions. [2022-07-22 22:00:00,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:00,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3177 transitions. [2022-07-22 22:00:00,128 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) [2022-07-22 22:00:00,131 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) [2022-07-22 22:00:00,131 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) [2022-07-22 22:00:00,131 INFO L186 Difference]: Start difference. First operand has 840 places, 1661 transitions, 41061 flow. Second operand 60 states and 3177 transitions. [2022-07-22 22:00:00,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 893 places, 1728 transitions, 45650 flow [2022-07-22 22:00:01,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 1728 transitions, 43367 flow, removed 16 selfloop flow, removed 47 redundant places. [2022-07-22 22:00:01,442 INFO L242 Difference]: Finished difference. Result has 849 places, 1665 transitions, 41736 flow [2022-07-22 22:00:01,443 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} [2022-07-22 22:00:01,444 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 772 predicate places. [2022-07-22 22:00:01,444 INFO L495 AbstractCegarLoop]: Abstraction has has 849 places, 1665 transitions, 41736 flow [2022-07-22 22:00:01,444 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) [2022-07-22 22:00:01,448 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:01,448 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] [2022-07-22 22:00:01,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 22:00:01,648 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 [2022-07-22 22:00:01,649 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1051537019, now seen corresponding path program 16 times [2022-07-22 22:00:01,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:01,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761938448] [2022-07-22 22:00:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:01,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:01,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761938448] [2022-07-22 22:00:01,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761938448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338104494] [2022-07-22 22:00:01,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 22:00:01,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:01,782 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) [2022-07-22 22:00:01,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 22:00:01,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 22:00:01,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:00:01,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 22:00:01,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:02,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:02,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338104494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:02,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:02,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-22 22:00:02,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102390752] [2022-07-22 22:00:02,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:02,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 22:00:02,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 22:00:02,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 22:00:02,485 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 22:00:02,486 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) [2022-07-22 22:00:02,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:02,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 22:00:02,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:07,485 INFO L129 PetriNetUnfolder]: 1541/4021 cut-off events. [2022-07-22 22:00:07,485 INFO L130 PetriNetUnfolder]: For 133576/133576 co-relation queries the response was YES. [2022-07-22 22:00:07,535 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. [2022-07-22 22:00:07,561 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 781 selfloop transitions, 1171 changer transitions 26/2017 dead transitions. [2022-07-22 22:00:07,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 960 places, 2017 transitions, 53397 flow [2022-07-22 22:00:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-22 22:00:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-07-22 22:00:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 6154 transitions. [2022-07-22 22:00:07,565 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.609789932619897 [2022-07-22 22:00:07,565 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 6154 transitions. [2022-07-22 22:00:07,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 6154 transitions. [2022-07-22 22:00:07,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:07,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 6154 transitions. [2022-07-22 22:00:07,569 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) [2022-07-22 22:00:07,574 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) [2022-07-22 22:00:07,574 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) [2022-07-22 22:00:07,575 INFO L186 Difference]: Start difference. First operand has 849 places, 1665 transitions, 41736 flow. Second operand 116 states and 6154 transitions. [2022-07-22 22:00:07,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 960 places, 2017 transitions, 53397 flow [2022-07-22 22:00:09,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 2017 transitions, 50540 flow, removed 5 selfloop flow, removed 51 redundant places. [2022-07-22 22:00:09,064 INFO L242 Difference]: Finished difference. Result has 930 places, 1882 transitions, 46945 flow [2022-07-22 22:00:09,066 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} [2022-07-22 22:00:09,066 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 853 predicate places. [2022-07-22 22:00:09,066 INFO L495 AbstractCegarLoop]: Abstraction has has 930 places, 1882 transitions, 46945 flow [2022-07-22 22:00:09,067 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) [2022-07-22 22:00:09,067 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:09,067 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] [2022-07-22 22:00:09,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-22 22:00:09,283 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 [2022-07-22 22:00:09,284 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1509753261, now seen corresponding path program 17 times [2022-07-22 22:00:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:09,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134549740] [2022-07-22 22:00:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:09,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:09,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:09,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134549740] [2022-07-22 22:00:09,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134549740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:09,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778120430] [2022-07-22 22:00:09,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 22:00:09,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:09,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:09,378 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) [2022-07-22 22:00:09,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 22:00:09,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 22:00:09,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:00:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 22:00:09,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:09,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:09,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778120430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:09,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:09,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-22 22:00:09,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437704911] [2022-07-22 22:00:09,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:09,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 22:00:09,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:09,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 22:00:09,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 22:00:09,915 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 22:00:09,916 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) [2022-07-22 22:00:09,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:09,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 22:00:09,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:13,282 INFO L129 PetriNetUnfolder]: 1768/4475 cut-off events. [2022-07-22 22:00:13,282 INFO L130 PetriNetUnfolder]: For 153513/153513 co-relation queries the response was YES. [2022-07-22 22:00:13,346 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. [2022-07-22 22:00:13,375 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 666 selfloop transitions, 1600 changer transitions 9/2314 dead transitions. [2022-07-22 22:00:13,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 2314 transitions, 61976 flow [2022-07-22 22:00:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 22:00:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-22 22:00:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2351 transitions. [2022-07-22 22:00:13,377 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.614158829676071 [2022-07-22 22:00:13,377 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2351 transitions. [2022-07-22 22:00:13,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2351 transitions. [2022-07-22 22:00:13,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:13,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2351 transitions. [2022-07-22 22:00:13,380 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) [2022-07-22 22:00:13,381 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) [2022-07-22 22:00:13,382 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) [2022-07-22 22:00:13,382 INFO L186 Difference]: Start difference. First operand has 930 places, 1882 transitions, 46945 flow. Second operand 44 states and 2351 transitions. [2022-07-22 22:00:13,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 2314 transitions, 61976 flow [2022-07-22 22:00:15,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 918 places, 2314 transitions, 60528 flow, removed 103 selfloop flow, removed 44 redundant places. [2022-07-22 22:00:15,186 INFO L242 Difference]: Finished difference. Result has 947 places, 2237 transitions, 60282 flow [2022-07-22 22:00:15,187 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} [2022-07-22 22:00:15,188 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 870 predicate places. [2022-07-22 22:00:15,188 INFO L495 AbstractCegarLoop]: Abstraction has has 947 places, 2237 transitions, 60282 flow [2022-07-22 22:00:15,188 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) [2022-07-22 22:00:15,188 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:15,188 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] [2022-07-22 22:00:15,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 22:00:15,409 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 [2022-07-22 22:00:15,410 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:15,410 INFO L85 PathProgramCache]: Analyzing trace with hash -2133095729, now seen corresponding path program 18 times [2022-07-22 22:00:15,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:15,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031053235] [2022-07-22 22:00:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:15,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:15,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:15,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031053235] [2022-07-22 22:00:15,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031053235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:15,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872272650] [2022-07-22 22:00:15,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 22:00:15,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:15,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:15,558 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) [2022-07-22 22:00:15,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 22:00:15,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 22:00:15,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:00:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 22:00:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:15,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:16,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872272650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:16,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:16,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-22 22:00:16,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788440824] [2022-07-22 22:00:16,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:16,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 22:00:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:16,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 22:00:16,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 22:00:16,123 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 22:00:16,124 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) [2022-07-22 22:00:16,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:16,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 22:00:16,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:20,344 INFO L129 PetriNetUnfolder]: 2184/5326 cut-off events. [2022-07-22 22:00:20,345 INFO L130 PetriNetUnfolder]: For 203232/203232 co-relation queries the response was YES. [2022-07-22 22:00:20,430 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. [2022-07-22 22:00:20,476 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 963 selfloop transitions, 1938 changer transitions 9/2949 dead transitions. [2022-07-22 22:00:20,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 2949 transitions, 85202 flow [2022-07-22 22:00:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 22:00:20,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-22 22:00:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1923 transitions. [2022-07-22 22:00:20,478 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6139846743295019 [2022-07-22 22:00:20,478 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1923 transitions. [2022-07-22 22:00:20,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1923 transitions. [2022-07-22 22:00:20,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:20,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1923 transitions. [2022-07-22 22:00:20,481 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) [2022-07-22 22:00:20,482 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) [2022-07-22 22:00:20,482 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) [2022-07-22 22:00:20,482 INFO L186 Difference]: Start difference. First operand has 947 places, 2237 transitions, 60282 flow. Second operand 36 states and 1923 transitions. [2022-07-22 22:00:20,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 2949 transitions, 85202 flow [2022-07-22 22:00:23,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 965 places, 2949 transitions, 84921 flow, removed 64 selfloop flow, removed 13 redundant places. [2022-07-22 22:00:23,516 INFO L242 Difference]: Finished difference. Result has 986 places, 2860 transitions, 83626 flow [2022-07-22 22:00:23,517 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} [2022-07-22 22:00:23,517 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 909 predicate places. [2022-07-22 22:00:23,518 INFO L495 AbstractCegarLoop]: Abstraction has has 986 places, 2860 transitions, 83626 flow [2022-07-22 22:00:23,518 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) [2022-07-22 22:00:23,518 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:23,518 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] [2022-07-22 22:00:23,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-22 22:00:23,732 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 [2022-07-22 22:00:23,732 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash -796421737, now seen corresponding path program 19 times [2022-07-22 22:00:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:23,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314869176] [2022-07-22 22:00:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:23,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:23,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:23,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314869176] [2022-07-22 22:00:23,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314869176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:23,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987549955] [2022-07-22 22:00:23,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 22:00:23,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:23,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:23,872 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) [2022-07-22 22:00:23,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 22:00:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:23,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 22:00:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:24,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:24,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987549955] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:24,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:24,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 22:00:24,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426955693] [2022-07-22 22:00:24,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:24,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 22:00:24,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 22:00:24,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 22:00:24,518 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 22:00:24,518 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) [2022-07-22 22:00:24,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:24,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 22:00:24,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:32,786 INFO L129 PetriNetUnfolder]: 2415/5809 cut-off events. [2022-07-22 22:00:32,786 INFO L130 PetriNetUnfolder]: For 246812/246812 co-relation queries the response was YES. [2022-07-22 22:00:32,895 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. [2022-07-22 22:00:32,946 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1064 selfloop transitions, 2268 changer transitions 10/3381 dead transitions. [2022-07-22 22:00:32,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1068 places, 3381 transitions, 104032 flow [2022-07-22 22:00:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-22 22:00:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-22 22:00:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4603 transitions. [2022-07-22 22:00:32,952 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6081384595058792 [2022-07-22 22:00:32,952 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4603 transitions. [2022-07-22 22:00:32,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4603 transitions. [2022-07-22 22:00:32,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:32,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4603 transitions. [2022-07-22 22:00:32,960 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) [2022-07-22 22:00:32,964 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) [2022-07-22 22:00:32,964 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) [2022-07-22 22:00:32,964 INFO L186 Difference]: Start difference. First operand has 986 places, 2860 transitions, 83626 flow. Second operand 87 states and 4603 transitions. [2022-07-22 22:00:32,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1068 places, 3381 transitions, 104032 flow [2022-07-22 22:00:36,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1057 places, 3381 transitions, 103402 flow, removed 103 selfloop flow, removed 11 redundant places. [2022-07-22 22:00:37,048 INFO L242 Difference]: Finished difference. Result has 1083 places, 3267 transitions, 100762 flow [2022-07-22 22:00:37,050 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} [2022-07-22 22:00:37,051 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1006 predicate places. [2022-07-22 22:00:37,051 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 3267 transitions, 100762 flow [2022-07-22 22:00:37,051 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) [2022-07-22 22:00:37,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:37,051 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] [2022-07-22 22:00:37,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 22:00:37,262 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 [2022-07-22 22:00:37,262 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 418442369, now seen corresponding path program 20 times [2022-07-22 22:00:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:37,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190624974] [2022-07-22 22:00:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:37,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:37,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190624974] [2022-07-22 22:00:37,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190624974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:37,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058708375] [2022-07-22 22:00:37,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:00:37,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:37,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:37,443 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) [2022-07-22 22:00:37,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 22:00:37,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:00:37,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:00:37,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 22:00:37,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:37,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:38,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058708375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:38,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:38,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 22:00:38,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632543214] [2022-07-22 22:00:38,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:38,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 22:00:38,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 22:00:38,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 22:00:38,181 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 22:00:38,182 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) [2022-07-22 22:00:38,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:38,182 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 22:00:38,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:45,525 INFO L129 PetriNetUnfolder]: 2416/5848 cut-off events. [2022-07-22 22:00:45,525 INFO L130 PetriNetUnfolder]: For 276489/276489 co-relation queries the response was YES. [2022-07-22 22:00:45,643 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. [2022-07-22 22:00:45,689 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1343 selfloop transitions, 1970 changer transitions 10/3362 dead transitions. [2022-07-22 22:00:45,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 3362 transitions, 109573 flow [2022-07-22 22:00:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 22:00:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-22 22:00:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2874 transitions. [2022-07-22 22:00:45,691 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.611749680715198 [2022-07-22 22:00:45,691 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2874 transitions. [2022-07-22 22:00:45,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2874 transitions. [2022-07-22 22:00:45,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:45,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2874 transitions. [2022-07-22 22:00:45,695 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) [2022-07-22 22:00:45,697 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) [2022-07-22 22:00:45,697 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) [2022-07-22 22:00:45,697 INFO L186 Difference]: Start difference. First operand has 1083 places, 3267 transitions, 100762 flow. Second operand 54 states and 2874 transitions. [2022-07-22 22:00:45,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 3362 transitions, 109573 flow [2022-07-22 22:00:51,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1111 places, 3362 transitions, 108811 flow, removed 121 selfloop flow, removed 20 redundant places. [2022-07-22 22:00:51,181 INFO L242 Difference]: Finished difference. Result has 1121 places, 3293 transitions, 105473 flow [2022-07-22 22:00:51,183 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} [2022-07-22 22:00:51,183 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1044 predicate places. [2022-07-22 22:00:51,184 INFO L495 AbstractCegarLoop]: Abstraction has has 1121 places, 3293 transitions, 105473 flow [2022-07-22 22:00:51,184 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) [2022-07-22 22:00:51,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:00:51,184 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] [2022-07-22 22:00:51,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 22:00:51,400 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 [2022-07-22 22:00:51,400 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:00:51,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:00:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1588638345, now seen corresponding path program 21 times [2022-07-22 22:00:51,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:00:51,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280286293] [2022-07-22 22:00:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:00:51,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:00:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:00:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:51,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:00:51,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280286293] [2022-07-22 22:00:51,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280286293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:00:51,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961691558] [2022-07-22 22:00:51,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:00:51,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:00:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:00:51,616 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) [2022-07-22 22:00:51,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 22:00:51,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 22:00:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:00:51,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 22:00:51,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:00:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:51,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:00:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:00:52,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961691558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:00:52,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:00:52,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-22 22:00:52,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562775687] [2022-07-22 22:00:52,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:00:52,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 22:00:52,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:00:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 22:00:52,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 22:00:52,271 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 22:00:52,272 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) [2022-07-22 22:00:52,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:00:52,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 22:00:52,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:00:59,596 INFO L129 PetriNetUnfolder]: 2416/5871 cut-off events. [2022-07-22 22:00:59,596 INFO L130 PetriNetUnfolder]: For 306475/306475 co-relation queries the response was YES. [2022-07-22 22:00:59,703 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. [2022-07-22 22:00:59,752 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1351 selfloop transitions, 1965 changer transitions 17/3372 dead transitions. [2022-07-22 22:00:59,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1168 places, 3372 transitions, 113868 flow [2022-07-22 22:00:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 22:00:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-22 22:00:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2816 transitions. [2022-07-22 22:00:59,755 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6107135111689438 [2022-07-22 22:00:59,755 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2816 transitions. [2022-07-22 22:00:59,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2816 transitions. [2022-07-22 22:00:59,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:00:59,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2816 transitions. [2022-07-22 22:00:59,757 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) [2022-07-22 22:00:59,761 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) [2022-07-22 22:00:59,762 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) [2022-07-22 22:00:59,762 INFO L186 Difference]: Start difference. First operand has 1121 places, 3293 transitions, 105473 flow. Second operand 53 states and 2816 transitions. [2022-07-22 22:00:59,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1168 places, 3372 transitions, 113868 flow [2022-07-22 22:01:04,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1142 places, 3372 transitions, 111602 flow, removed 28 selfloop flow, removed 26 redundant places. [2022-07-22 22:01:04,728 INFO L242 Difference]: Finished difference. Result has 1151 places, 3301 transitions, 107867 flow [2022-07-22 22:01:04,730 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} [2022-07-22 22:01:04,731 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1074 predicate places. [2022-07-22 22:01:04,731 INFO L495 AbstractCegarLoop]: Abstraction has has 1151 places, 3301 transitions, 107867 flow [2022-07-22 22:01:04,731 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) [2022-07-22 22:01:04,731 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:01:04,731 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] [2022-07-22 22:01:04,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-22 22:01:04,935 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 [2022-07-22 22:01:04,935 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:01:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:01:04,936 INFO L85 PathProgramCache]: Analyzing trace with hash -24500895, now seen corresponding path program 22 times [2022-07-22 22:01:04,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:01:04,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587719952] [2022-07-22 22:01:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:04,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:01:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:05,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:01:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587719952] [2022-07-22 22:01:05,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587719952] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:01:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439465348] [2022-07-22 22:01:05,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 22:01:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:01:05,103 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) [2022-07-22 22:01:05,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 22:01:05,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 22:01:05,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:01:05,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 22:01:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:01:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:05,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:01:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:05,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439465348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:01:05,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:01:05,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-07-22 22:01:05,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293806344] [2022-07-22 22:01:05,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:01:05,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 22:01:05,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:01:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 22:01:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-07-22 22:01:05,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 22:01:05,600 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) [2022-07-22 22:01:05,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:01:05,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 22:01:05,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:01:18,226 INFO L129 PetriNetUnfolder]: 4290/9853 cut-off events. [2022-07-22 22:01:18,226 INFO L130 PetriNetUnfolder]: For 583891/583891 co-relation queries the response was YES. [2022-07-22 22:01:18,426 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. [2022-07-22 22:01:18,517 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1828 selfloop transitions, 4165 changer transitions 35/6067 dead transitions. [2022-07-22 22:01:18,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1238 places, 6067 transitions, 208624 flow [2022-07-22 22:01:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-22 22:01:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-07-22 22:01:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5207 transitions. [2022-07-22 22:01:18,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6107201501290171 [2022-07-22 22:01:18,520 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5207 transitions. [2022-07-22 22:01:18,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5207 transitions. [2022-07-22 22:01:18,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:01:18,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5207 transitions. [2022-07-22 22:01:18,524 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) [2022-07-22 22:01:18,528 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) [2022-07-22 22:01:18,529 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) [2022-07-22 22:01:18,529 INFO L186 Difference]: Start difference. First operand has 1151 places, 3301 transitions, 107867 flow. Second operand 98 states and 5207 transitions. [2022-07-22 22:01:18,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1238 places, 6067 transitions, 208624 flow [2022-07-22 22:01:33,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1201 places, 6067 transitions, 202771 flow, removed 31 selfloop flow, removed 37 redundant places. [2022-07-22 22:01:33,985 INFO L242 Difference]: Finished difference. Result has 1249 places, 5730 transitions, 197598 flow [2022-07-22 22:01:33,988 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} [2022-07-22 22:01:33,988 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1172 predicate places. [2022-07-22 22:01:33,988 INFO L495 AbstractCegarLoop]: Abstraction has has 1249 places, 5730 transitions, 197598 flow [2022-07-22 22:01:33,988 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) [2022-07-22 22:01:33,989 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:01:33,989 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] [2022-07-22 22:01:34,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-22 22:01:34,203 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 [2022-07-22 22:01:34,203 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:01:34,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:01:34,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1532947721, now seen corresponding path program 23 times [2022-07-22 22:01:34,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:01:34,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522437106] [2022-07-22 22:01:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:01:34,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:01:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:01:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:34,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:01:34,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522437106] [2022-07-22 22:01:34,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522437106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:01:34,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546227351] [2022-07-22 22:01:34,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 22:01:34,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:01:34,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:01:34,332 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) [2022-07-22 22:01:34,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 22:01:34,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:01:34,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:01:34,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 22:01:34,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:01:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:01:34,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:01:34,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546227351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:01:34,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:01:34,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-07-22 22:01:34,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992717580] [2022-07-22 22:01:34,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:01:34,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 22:01:34,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:01:34,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 22:01:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-07-22 22:01:34,633 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-22 22:01:34,634 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) [2022-07-22 22:01:34,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:01:34,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-22 22:01:34,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 22:02:01,244 INFO L129 PetriNetUnfolder]: 5527/12313 cut-off events. [2022-07-22 22:02:01,244 INFO L130 PetriNetUnfolder]: For 808410/808410 co-relation queries the response was YES. [2022-07-22 22:02:01,561 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. [2022-07-22 22:02:01,693 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 2042 selfloop transitions, 5942 changer transitions 34/8059 dead transitions. [2022-07-22 22:02:01,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1277 places, 8059 transitions, 292461 flow [2022-07-22 22:02:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 22:02:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-22 22:02:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1785 transitions. [2022-07-22 22:02:01,695 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6411637931034483 [2022-07-22 22:02:01,695 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1785 transitions. [2022-07-22 22:02:01,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1785 transitions. [2022-07-22 22:02:01,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 22:02:01,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1785 transitions. [2022-07-22 22:02:01,696 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) [2022-07-22 22:02:01,698 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) [2022-07-22 22:02:01,698 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) [2022-07-22 22:02:01,705 INFO L186 Difference]: Start difference. First operand has 1249 places, 5730 transitions, 197598 flow. Second operand 32 states and 1785 transitions. [2022-07-22 22:02:01,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1277 places, 8059 transitions, 292461 flow [2022-07-22 22:02:36,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1272 places, 8059 transitions, 290962 flow, removed 625 selfloop flow, removed 5 redundant places. [2022-07-22 22:02:37,225 INFO L242 Difference]: Finished difference. Result has 1293 places, 7804 transitions, 286773 flow [2022-07-22 22:02:37,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=196445, PETRI_DIFFERENCE_MINUEND_PLACES=1241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3883, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=286773, PETRI_PLACES=1293, PETRI_TRANSITIONS=7804} [2022-07-22 22:02:37,231 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1216 predicate places. [2022-07-22 22:02:37,231 INFO L495 AbstractCegarLoop]: Abstraction has has 1293 places, 7804 transitions, 286773 flow [2022-07-22 22:02:37,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-22 22:02:37,231 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 22:02:37,231 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] [2022-07-22 22:02:37,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-22 22:02:37,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-22 22:02:37,457 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 22:02:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:02:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash 250587137, now seen corresponding path program 24 times [2022-07-22 22:02:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:02:37,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534934571] [2022-07-22 22:02:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:02:37,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:02:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:02:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:02:37,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:02:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534934571] [2022-07-22 22:02:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534934571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:02:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997810209] [2022-07-22 22:02:37,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 22:02:37,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:02:37,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:02:37,587 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 22:02:37,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 22:02:37,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-22 22:02:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:02:37,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 22:02:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:02:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:02:37,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:02:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:02:38,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997810209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:02:38,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:02:38,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-07-22 22:02:38,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745178368] [2022-07-22 22:02:38,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:02:38,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 22:02:38,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:02:38,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 22:02:38,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 22:02:38,261 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-22 22:02:38,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1293 places, 7804 transitions, 286773 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) [2022-07-22 22:02:38,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 22:02:38,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-22 22:02:38,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand