./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i --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/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -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 c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:34:16,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:34:16,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:34:16,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:34:16,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:34:16,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:34:16,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:34:16,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:34:16,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:34:16,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:34:16,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:34:16,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:34:16,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:34:16,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:34:16,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:34:16,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:34:16,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:34:16,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:34:16,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:34:16,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:34:16,687 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:34:16,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:34:16,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:34:16,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:34:16,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:34:16,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:34:16,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:34:16,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:34:16,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:34:16,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:34:16,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:34:16,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:34:16,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:34:16,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:34:16,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:34:16,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:34:16,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:34:16,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:34:16,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:34:16,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:34:16,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:34:16,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:34:16,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:34:16,732 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:34:16,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:34:16,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:34:16,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:34:16,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:34:16,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:34:16,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:34:16,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:34:16,735 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:34:16,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:34:16,735 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:34:16,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:34:16,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:34:16,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:34:16,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:34:16,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:34:16,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:34:16,736 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:34:16,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:34:16,736 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:34:16,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:34:16,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:34:16,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:34:16,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:34:16,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:34:16,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:34:16,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:34:16,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:34:16,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:34:16,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:34:16,738 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:34:16,738 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:34:16,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:34:16,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 [2022-07-22 21:34:16,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:34:16,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:34:16,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:34:16,911 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:34:16,911 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:34:16,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-07-22 21:34:16,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172a43a5c/2d6d7d155a884f318e743b13d0ab12ba/FLAG4a9c6b3a4 [2022-07-22 21:34:17,392 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:34:17,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-07-22 21:34:17,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172a43a5c/2d6d7d155a884f318e743b13d0ab12ba/FLAG4a9c6b3a4 [2022-07-22 21:34:17,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172a43a5c/2d6d7d155a884f318e743b13d0ab12ba [2022-07-22 21:34:17,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:34:17,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:34:17,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:17,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:34:17,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:34:17,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d66d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17, skipping insertion in model container [2022-07-22 21:34:17,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:34:17,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:34:17,809 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/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-07-22 21:34:17,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:17,856 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:34:17,890 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/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-07-22 21:34:17,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:17,951 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:34:17,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17 WrapperNode [2022-07-22 21:34:17,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:17,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:17,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:34:17,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:34:17,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:18,005 INFO L137 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2022-07-22 21:34:18,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:18,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:34:18,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:34:18,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:34:18,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:18,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:18,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:18,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:18,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:18,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:18,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:18,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:34:18,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:34:18,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:34:18,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:34:18,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:18,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:34:18,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:18,065 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 21:34:18,071 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 21:34:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:34:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:34:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:34:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:34:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:34:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:34:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-22 21:34:18,094 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-22 21:34:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:34:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:34:18,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:34:18,095 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 21:34:18,186 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:34:18,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:34:18,471 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:34:18,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:34:18,477 INFO L299 CfgBuilder]: Removed 35 assume(true) statements. [2022-07-22 21:34:18,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:18 BoogieIcfgContainer [2022-07-22 21:34:18,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:34:18,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:34:18,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:34:18,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:34:18,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:34:17" (1/3) ... [2022-07-22 21:34:18,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ca24b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:18, skipping insertion in model container [2022-07-22 21:34:18,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (2/3) ... [2022-07-22 21:34:18,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ca24b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:18, skipping insertion in model container [2022-07-22 21:34:18,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:18" (3/3) ... [2022-07-22 21:34:18,484 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2022-07-22 21:34:18,488 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:34:18,495 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:34:18,495 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-22 21:34:18,495 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:34:18,553 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:34:18,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 213 places, 255 transitions, 518 flow [2022-07-22 21:34:18,698 INFO L129 PetriNetUnfolder]: 73/394 cut-off events. [2022-07-22 21:34:18,698 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:18,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 394 events. 73/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1789 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2022-07-22 21:34:18,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 255 transitions, 518 flow [2022-07-22 21:34:18,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 250 transitions, 505 flow [2022-07-22 21:34:18,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:18,731 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@4b65e113, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78df95f2 [2022-07-22 21:34:18,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:34:18,749 INFO L129 PetriNetUnfolder]: 19/149 cut-off events. [2022-07-22 21:34:18,749 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:18,750 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:18,750 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:18,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1488741163, now seen corresponding path program 1 times [2022-07-22 21:34:18,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:18,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323819429] [2022-07-22 21:34:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:18,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:18,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323819429] [2022-07-22 21:34:18,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323819429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:18,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:18,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983224742] [2022-07-22 21:34:18,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:18,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:18,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:18,953 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 255 [2022-07-22 21:34:18,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 250 transitions, 505 flow. Second operand has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 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 21:34:18,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:18,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 255 [2022-07-22 21:34:18,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:19,008 INFO L129 PetriNetUnfolder]: 9/321 cut-off events. [2022-07-22 21:34:19,009 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:19,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 321 events. 9/321 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1416 event pairs, 0 based on Foata normal form. 63/366 useless extension candidates. Maximal degree in co-relation 177. Up to 4 conditions per place. [2022-07-22 21:34:19,014 INFO L132 encePairwiseOnDemand]: 217/255 looper letters, 1 selfloop transitions, 0 changer transitions 0/209 dead transitions. [2022-07-22 21:34:19,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 209 transitions, 425 flow [2022-07-22 21:34:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-07-22 21:34:19,025 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.907843137254902 [2022-07-22 21:34:19,026 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-07-22 21:34:19,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-07-22 21:34:19,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:19,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-07-22 21:34:19,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,038 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,040 INFO L186 Difference]: Start difference. First operand has 209 places, 250 transitions, 505 flow. Second operand 2 states and 463 transitions. [2022-07-22 21:34:19,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 209 transitions, 425 flow [2022-07-22 21:34:19,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 209 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:19,046 INFO L242 Difference]: Finished difference. Result has 207 places, 209 transitions, 423 flow [2022-07-22 21:34:19,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=423, PETRI_PLACES=207, PETRI_TRANSITIONS=209} [2022-07-22 21:34:19,050 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -2 predicate places. [2022-07-22 21:34:19,050 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 209 transitions, 423 flow [2022-07-22 21:34:19,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 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 21:34:19,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:19,051 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:19,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:34:19,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1961754262, now seen corresponding path program 1 times [2022-07-22 21:34:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:19,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371748656] [2022-07-22 21:34:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:19,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:19,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:19,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371748656] [2022-07-22 21:34:19,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371748656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:19,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:19,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:19,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340527213] [2022-07-22 21:34:19,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:19,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:19,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:19,111 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 255 [2022-07-22 21:34:19,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 209 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:19,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 255 [2022-07-22 21:34:19,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:19,170 INFO L129 PetriNetUnfolder]: 9/325 cut-off events. [2022-07-22 21:34:19,170 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:19,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 325 events. 9/325 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1414 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 340. Up to 9 conditions per place. [2022-07-22 21:34:19,178 INFO L132 encePairwiseOnDemand]: 252/255 looper letters, 10 selfloop transitions, 2 changer transitions 0/213 dead transitions. [2022-07-22 21:34:19,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 213 transitions, 455 flow [2022-07-22 21:34:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2022-07-22 21:34:19,182 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8209150326797385 [2022-07-22 21:34:19,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2022-07-22 21:34:19,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2022-07-22 21:34:19,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:19,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2022-07-22 21:34:19,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,188 INFO L186 Difference]: Start difference. First operand has 207 places, 209 transitions, 423 flow. Second operand 3 states and 628 transitions. [2022-07-22 21:34:19,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 213 transitions, 455 flow [2022-07-22 21:34:19,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 213 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:19,197 INFO L242 Difference]: Finished difference. Result has 210 places, 210 transitions, 435 flow [2022-07-22 21:34:19,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=210, PETRI_TRANSITIONS=210} [2022-07-22 21:34:19,198 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 1 predicate places. [2022-07-22 21:34:19,198 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 210 transitions, 435 flow [2022-07-22 21:34:19,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,199 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:19,199 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:19,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:34:19,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:19,201 INFO L85 PathProgramCache]: Analyzing trace with hash -929438698, now seen corresponding path program 1 times [2022-07-22 21:34:19,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:19,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257071638] [2022-07-22 21:34:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:19,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:19,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257071638] [2022-07-22 21:34:19,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257071638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449458889] [2022-07-22 21:34:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:19,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:19,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:19,306 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 21:34:19,316 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 21:34:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:19,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:19,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:19,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449458889] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:19,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:19,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:19,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927309813] [2022-07-22 21:34:19,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:19,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:19,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:19,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:19,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:19,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-07-22 21:34:19,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 210 transitions, 435 flow. Second operand has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:19,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-07-22 21:34:19,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:19,620 INFO L129 PetriNetUnfolder]: 9/332 cut-off events. [2022-07-22 21:34:19,621 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:34:19,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 332 events. 9/332 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1409 event pairs, 0 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 361. Up to 6 conditions per place. [2022-07-22 21:34:19,623 INFO L132 encePairwiseOnDemand]: 249/255 looper letters, 11 selfloop transitions, 9 changer transitions 0/220 dead transitions. [2022-07-22 21:34:19,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 220 transitions, 497 flow [2022-07-22 21:34:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1858 transitions. [2022-07-22 21:34:19,628 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8095860566448801 [2022-07-22 21:34:19,628 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1858 transitions. [2022-07-22 21:34:19,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1858 transitions. [2022-07-22 21:34:19,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:19,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1858 transitions. [2022-07-22 21:34:19,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 206.44444444444446) internal successors, (1858), 9 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,648 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,648 INFO L186 Difference]: Start difference. First operand has 210 places, 210 transitions, 435 flow. Second operand 9 states and 1858 transitions. [2022-07-22 21:34:19,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 220 transitions, 497 flow [2022-07-22 21:34:19,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 220 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:19,651 INFO L242 Difference]: Finished difference. Result has 220 places, 216 transitions, 483 flow [2022-07-22 21:34:19,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=483, PETRI_PLACES=220, PETRI_TRANSITIONS=216} [2022-07-22 21:34:19,653 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 11 predicate places. [2022-07-22 21:34:19,654 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 216 transitions, 483 flow [2022-07-22 21:34:19,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:19,655 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:19,655 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:19,676 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 21:34:19,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:19,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1473481706, now seen corresponding path program 2 times [2022-07-22 21:34:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:19,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503615548] [2022-07-22 21:34:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:19,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:19,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503615548] [2022-07-22 21:34:19,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503615548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:19,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789004957] [2022-07-22 21:34:19,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:34:19,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:19,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:19,941 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 21:34:19,954 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 21:34:20,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:34:20,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:20,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:20,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:20,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789004957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:20,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:20,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805037187] [2022-07-22 21:34:20,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:20,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:20,118 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-07-22 21:34:20,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 216 transitions, 483 flow. Second operand has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:20,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:20,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-07-22 21:34:20,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:20,279 INFO L129 PetriNetUnfolder]: 9/352 cut-off events. [2022-07-22 21:34:20,280 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-22 21:34:20,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 352 events. 9/352 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1409 event pairs, 0 based on Foata normal form. 4/339 useless extension candidates. Maximal degree in co-relation 448. Up to 11 conditions per place. [2022-07-22 21:34:20,282 INFO L132 encePairwiseOnDemand]: 249/255 looper letters, 19 selfloop transitions, 21 changer transitions 0/240 dead transitions. [2022-07-22 21:34:20,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 240 transitions, 671 flow [2022-07-22 21:34:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4328 transitions. [2022-07-22 21:34:20,302 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8082166199813259 [2022-07-22 21:34:20,302 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4328 transitions. [2022-07-22 21:34:20,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4328 transitions. [2022-07-22 21:34:20,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:20,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4328 transitions. [2022-07-22 21:34:20,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 206.0952380952381) internal successors, (4328), 21 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:20,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:20,321 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:20,321 INFO L186 Difference]: Start difference. First operand has 220 places, 216 transitions, 483 flow. Second operand 21 states and 4328 transitions. [2022-07-22 21:34:20,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 240 transitions, 671 flow [2022-07-22 21:34:20,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 240 transitions, 657 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:20,326 INFO L242 Difference]: Finished difference. Result has 244 places, 229 transitions, 607 flow [2022-07-22 21:34:20,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=607, PETRI_PLACES=244, PETRI_TRANSITIONS=229} [2022-07-22 21:34:20,327 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 35 predicate places. [2022-07-22 21:34:20,327 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 229 transitions, 607 flow [2022-07-22 21:34:20,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:20,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:20,329 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:20,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:20,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 21:34:20,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:20,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash -898264042, now seen corresponding path program 3 times [2022-07-22 21:34:20,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:20,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532173251] [2022-07-22 21:34:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:20,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:20,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:20,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532173251] [2022-07-22 21:34:20,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532173251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701604742] [2022-07-22 21:34:20,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:34:20,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:20,695 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 21:34:20,697 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 21:34:20,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 21:34:20,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:20,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:20,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:20,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701604742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:20,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:20,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-22 21:34:20,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432820611] [2022-07-22 21:34:20,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:20,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:34:20,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:20,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:34:20,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:34:20,943 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-07-22 21:34:20,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 229 transitions, 607 flow. Second operand has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:20,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:20,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-07-22 21:34:20,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:21,229 INFO L129 PetriNetUnfolder]: 9/367 cut-off events. [2022-07-22 21:34:21,229 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-22 21:34:21,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 367 events. 9/367 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1410 event pairs, 0 based on Foata normal form. 3/353 useless extension candidates. Maximal degree in co-relation 544. Up to 17 conditions per place. [2022-07-22 21:34:21,231 INFO L132 encePairwiseOnDemand]: 249/255 looper letters, 25 selfloop transitions, 30 changer transitions 0/255 dead transitions. [2022-07-22 21:34:21,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 255 transitions, 863 flow [2022-07-22 21:34:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:34:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:34:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6178 transitions. [2022-07-22 21:34:21,241 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8075816993464052 [2022-07-22 21:34:21,241 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6178 transitions. [2022-07-22 21:34:21,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6178 transitions. [2022-07-22 21:34:21,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:21,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6178 transitions. [2022-07-22 21:34:21,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 205.93333333333334) internal successors, (6178), 30 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:21,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:21,265 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:21,266 INFO L186 Difference]: Start difference. First operand has 244 places, 229 transitions, 607 flow. Second operand 30 states and 6178 transitions. [2022-07-22 21:34:21,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 255 transitions, 863 flow [2022-07-22 21:34:21,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 255 transitions, 833 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-22 21:34:21,271 INFO L242 Difference]: Finished difference. Result has 271 places, 239 transitions, 735 flow [2022-07-22 21:34:21,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=735, PETRI_PLACES=271, PETRI_TRANSITIONS=239} [2022-07-22 21:34:21,272 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 62 predicate places. [2022-07-22 21:34:21,273 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 239 transitions, 735 flow [2022-07-22 21:34:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:21,274 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:21,274 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:21,294 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 21:34:21,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:21,491 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1658269334, now seen corresponding path program 4 times [2022-07-22 21:34:21,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:21,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463615040] [2022-07-22 21:34:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:21,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:21,514 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:21,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:21,567 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:21,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:34:21,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:34:21,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-22 21:34:21,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:34:21,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:34:21,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:34:21,571 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-07-22 21:34:21,573 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:21,573 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:34:21,601 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:34:21,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 674 flow [2022-07-22 21:34:21,653 INFO L129 PetriNetUnfolder]: 118/631 cut-off events. [2022-07-22 21:34:21,654 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:34:21,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 631 events. 118/631 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3241 event pairs, 0 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2022-07-22 21:34:21,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 328 transitions, 674 flow [2022-07-22 21:34:21,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 328 transitions, 674 flow [2022-07-22 21:34:21,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:21,671 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@4b65e113, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78df95f2 [2022-07-22 21:34:21,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:34:21,678 INFO L129 PetriNetUnfolder]: 19/184 cut-off events. [2022-07-22 21:34:21,678 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:21,679 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:21,679 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] [2022-07-22 21:34:21,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:21,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1958084880, now seen corresponding path program 1 times [2022-07-22 21:34:21,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:21,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761330596] [2022-07-22 21:34:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:21,706 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 21:34:21,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:21,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761330596] [2022-07-22 21:34:21,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761330596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:21,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:21,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:21,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037233605] [2022-07-22 21:34:21,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:21,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:21,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:21,710 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-07-22 21:34:21,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 328 transitions, 674 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 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 21:34:21,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:21,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-07-22 21:34:21,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:21,799 INFO L129 PetriNetUnfolder]: 17/526 cut-off events. [2022-07-22 21:34:21,800 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-22 21:34:21,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 526 events. 17/526 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2738 event pairs, 0 based on Foata normal form. 125/622 useless extension candidates. Maximal degree in co-relation 345. Up to 14 conditions per place. [2022-07-22 21:34:21,805 INFO L132 encePairwiseOnDemand]: 275/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/278 dead transitions. [2022-07-22 21:34:21,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 278 transitions, 604 flow [2022-07-22 21:34:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2022-07-22 21:34:21,810 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8699186991869918 [2022-07-22 21:34:21,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2022-07-22 21:34:21,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2022-07-22 21:34:21,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:21,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2022-07-22 21:34:21,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:21,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:21,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:21,814 INFO L186 Difference]: Start difference. First operand has 273 places, 328 transitions, 674 flow. Second operand 3 states and 856 transitions. [2022-07-22 21:34:21,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 278 transitions, 604 flow [2022-07-22 21:34:21,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 278 transitions, 604 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:21,819 INFO L242 Difference]: Finished difference. Result has 272 places, 275 transitions, 578 flow [2022-07-22 21:34:21,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=578, PETRI_PLACES=272, PETRI_TRANSITIONS=275} [2022-07-22 21:34:21,821 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, -1 predicate places. [2022-07-22 21:34:21,821 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 275 transitions, 578 flow [2022-07-22 21:34:21,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 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 21:34:21,823 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:21,823 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:21,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:34:21,824 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:21,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1150478808, now seen corresponding path program 1 times [2022-07-22 21:34:21,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:21,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831337000] [2022-07-22 21:34:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:21,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:21,857 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 21:34:21,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831337000] [2022-07-22 21:34:21,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831337000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455846923] [2022-07-22 21:34:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:21,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:21,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:21,860 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 21:34:21,888 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 21:34:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:21,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 21:34:21,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:21,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:21,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455846923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:21,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:21,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:34:21,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364397358] [2022-07-22 21:34:21,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:21,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:21,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:34:21,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-07-22 21:34:21,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 275 transitions, 578 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 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 21:34:21,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:21,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-07-22 21:34:21,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:21,990 INFO L129 PetriNetUnfolder]: 13/427 cut-off events. [2022-07-22 21:34:21,990 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-22 21:34:21,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 427 events. 13/427 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1974 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2022-07-22 21:34:21,996 INFO L132 encePairwiseOnDemand]: 325/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/279 dead transitions. [2022-07-22 21:34:21,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 279 transitions, 616 flow [2022-07-22 21:34:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-07-22 21:34:21,998 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.818089430894309 [2022-07-22 21:34:21,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-07-22 21:34:21,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-07-22 21:34:21,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:21,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-07-22 21:34:22,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,002 INFO L186 Difference]: Start difference. First operand has 272 places, 275 transitions, 578 flow. Second operand 3 states and 805 transitions. [2022-07-22 21:34:22,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 279 transitions, 616 flow [2022-07-22 21:34:22,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 279 transitions, 614 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:22,009 INFO L242 Difference]: Finished difference. Result has 274 places, 276 transitions, 588 flow [2022-07-22 21:34:22,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=588, PETRI_PLACES=274, PETRI_TRANSITIONS=276} [2022-07-22 21:34:22,011 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 1 predicate places. [2022-07-22 21:34:22,011 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 276 transitions, 588 flow [2022-07-22 21:34:22,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 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 21:34:22,012 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:22,013 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:22,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:22,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:22,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:22,230 INFO L85 PathProgramCache]: Analyzing trace with hash -930708873, now seen corresponding path program 1 times [2022-07-22 21:34:22,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:22,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737300307] [2022-07-22 21:34:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:22,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:22,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737300307] [2022-07-22 21:34:22,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737300307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:22,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130948834] [2022-07-22 21:34:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:22,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:22,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:22,275 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 21:34:22,288 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 21:34:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:22,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130948834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:22,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:22,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980407401] [2022-07-22 21:34:22,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:22,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:22,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:22,397 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-07-22 21:34:22,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 276 transitions, 588 flow. Second operand has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:22,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-07-22 21:34:22,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:22,494 INFO L129 PetriNetUnfolder]: 13/434 cut-off events. [2022-07-22 21:34:22,494 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-22 21:34:22,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 434 events. 13/434 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1969 event pairs, 0 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 417. Up to 11 conditions per place. [2022-07-22 21:34:22,499 INFO L132 encePairwiseOnDemand]: 322/328 looper letters, 14 selfloop transitions, 9 changer transitions 0/286 dead transitions. [2022-07-22 21:34:22,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 286 transitions, 656 flow [2022-07-22 21:34:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2383 transitions. [2022-07-22 21:34:22,503 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8072493224932249 [2022-07-22 21:34:22,503 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2383 transitions. [2022-07-22 21:34:22,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2383 transitions. [2022-07-22 21:34:22,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:22,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2383 transitions. [2022-07-22 21:34:22,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 264.77777777777777) internal successors, (2383), 9 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,510 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,510 INFO L186 Difference]: Start difference. First operand has 274 places, 276 transitions, 588 flow. Second operand 9 states and 2383 transitions. [2022-07-22 21:34:22,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 286 transitions, 656 flow [2022-07-22 21:34:22,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 286 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:22,514 INFO L242 Difference]: Finished difference. Result has 284 places, 282 transitions, 636 flow [2022-07-22 21:34:22,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=636, PETRI_PLACES=284, PETRI_TRANSITIONS=282} [2022-07-22 21:34:22,515 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 11 predicate places. [2022-07-22 21:34:22,516 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 282 transitions, 636 flow [2022-07-22 21:34:22,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:22,516 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 21:34:22,535 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 21:34:22,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:22,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:22,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash 951543159, now seen corresponding path program 2 times [2022-07-22 21:34:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:22,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880055335] [2022-07-22 21:34:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:22,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:22,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880055335] [2022-07-22 21:34:22,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880055335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:22,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416634667] [2022-07-22 21:34:22,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:34:22,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:22,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:22,787 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 21:34:22,813 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 21:34:22,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:34:22,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:22,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:22,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416634667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:22,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:22,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:22,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626711326] [2022-07-22 21:34:22,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:22,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:22,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:22,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:22,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-07-22 21:34:22,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 282 transitions, 636 flow. Second operand has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:22,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-07-22 21:34:22,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:23,205 INFO L129 PetriNetUnfolder]: 13/454 cut-off events. [2022-07-22 21:34:23,206 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-07-22 21:34:23,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 454 events. 13/454 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1969 event pairs, 0 based on Foata normal form. 4/438 useless extension candidates. Maximal degree in co-relation 421. Up to 11 conditions per place. [2022-07-22 21:34:23,211 INFO L132 encePairwiseOnDemand]: 322/328 looper letters, 22 selfloop transitions, 21 changer transitions 0/306 dead transitions. [2022-07-22 21:34:23,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 306 transitions, 830 flow [2022-07-22 21:34:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5549 transitions. [2022-07-22 21:34:23,221 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8056039488966318 [2022-07-22 21:34:23,221 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5549 transitions. [2022-07-22 21:34:23,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5549 transitions. [2022-07-22 21:34:23,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:23,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5549 transitions. [2022-07-22 21:34:23,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 264.23809523809524) internal successors, (5549), 21 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:23,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:23,243 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:23,244 INFO L186 Difference]: Start difference. First operand has 284 places, 282 transitions, 636 flow. Second operand 21 states and 5549 transitions. [2022-07-22 21:34:23,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 306 transitions, 830 flow [2022-07-22 21:34:23,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 306 transitions, 816 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:23,249 INFO L242 Difference]: Finished difference. Result has 308 places, 295 transitions, 760 flow [2022-07-22 21:34:23,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=760, PETRI_PLACES=308, PETRI_TRANSITIONS=295} [2022-07-22 21:34:23,250 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 35 predicate places. [2022-07-22 21:34:23,251 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 295 transitions, 760 flow [2022-07-22 21:34:23,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:23,252 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:23,252 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 21:34:23,280 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 21:34:23,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:23,468 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash 290057079, now seen corresponding path program 3 times [2022-07-22 21:34:23,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:23,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422829863] [2022-07-22 21:34:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:23,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:23,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:23,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422829863] [2022-07-22 21:34:23,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422829863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:23,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354784223] [2022-07-22 21:34:23,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:34:23,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:23,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:23,575 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 21:34:23,609 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 21:34:23,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 21:34:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:23,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:23,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:23,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354784223] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:23,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:23,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-22 21:34:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429610018] [2022-07-22 21:34:23,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:23,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:34:23,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:34:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:34:23,825 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-07-22 21:34:23,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 295 transitions, 760 flow. Second operand has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:23,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:23,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-07-22 21:34:23,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:24,104 INFO L129 PetriNetUnfolder]: 13/469 cut-off events. [2022-07-22 21:34:24,104 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-07-22 21:34:24,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 469 events. 13/469 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1969 event pairs, 0 based on Foata normal form. 3/452 useless extension candidates. Maximal degree in co-relation 453. Up to 17 conditions per place. [2022-07-22 21:34:24,109 INFO L132 encePairwiseOnDemand]: 322/328 looper letters, 28 selfloop transitions, 30 changer transitions 0/321 dead transitions. [2022-07-22 21:34:24,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 321 transitions, 1022 flow [2022-07-22 21:34:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:34:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:34:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7921 transitions. [2022-07-22 21:34:24,114 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8049796747967479 [2022-07-22 21:34:24,114 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7921 transitions. [2022-07-22 21:34:24,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7921 transitions. [2022-07-22 21:34:24,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:24,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7921 transitions. [2022-07-22 21:34:24,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 264.03333333333336) internal successors, (7921), 30 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,134 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,134 INFO L186 Difference]: Start difference. First operand has 308 places, 295 transitions, 760 flow. Second operand 30 states and 7921 transitions. [2022-07-22 21:34:24,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 321 transitions, 1022 flow [2022-07-22 21:34:24,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 321 transitions, 992 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-22 21:34:24,139 INFO L242 Difference]: Finished difference. Result has 335 places, 305 transitions, 888 flow [2022-07-22 21:34:24,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=888, PETRI_PLACES=335, PETRI_TRANSITIONS=305} [2022-07-22 21:34:24,140 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 62 predicate places. [2022-07-22 21:34:24,140 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 305 transitions, 888 flow [2022-07-22 21:34:24,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,141 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:24,141 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 21:34:24,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:24,358 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash 686461615, now seen corresponding path program 4 times [2022-07-22 21:34:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:24,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458060247] [2022-07-22 21:34:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:24,377 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:24,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:24,395 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:24,395 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:34:24,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:34:24,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-22 21:34:24,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:34:24,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:34:24,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:34:24,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:34:24,396 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-07-22 21:34:24,397 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:24,397 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:34:24,415 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:34:24,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 333 places, 401 transitions, 832 flow [2022-07-22 21:34:24,518 INFO L129 PetriNetUnfolder]: 168/901 cut-off events. [2022-07-22 21:34:24,518 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:34:24,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 901 events. 168/901 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4918 event pairs, 1 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 639. Up to 16 conditions per place. [2022-07-22 21:34:24,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 401 transitions, 832 flow [2022-07-22 21:34:24,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 401 transitions, 832 flow [2022-07-22 21:34:24,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:24,538 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@4b65e113, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78df95f2 [2022-07-22 21:34:24,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:34:24,544 INFO L129 PetriNetUnfolder]: 22/188 cut-off events. [2022-07-22 21:34:24,544 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:24,544 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:24,544 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] [2022-07-22 21:34:24,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -731965488, now seen corresponding path program 1 times [2022-07-22 21:34:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:24,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635573236] [2022-07-22 21:34:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:24,557 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 21:34:24,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635573236] [2022-07-22 21:34:24,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635573236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:24,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:24,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:24,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970270260] [2022-07-22 21:34:24,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:24,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:24,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:24,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:24,559 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-07-22 21:34:24,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 401 transitions, 832 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:24,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-07-22 21:34:24,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:24,649 INFO L129 PetriNetUnfolder]: 27/753 cut-off events. [2022-07-22 21:34:24,650 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-22 21:34:24,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 753 events. 27/753 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4217 event pairs, 1 based on Foata normal form. 255/966 useless extension candidates. Maximal degree in co-relation 551. Up to 23 conditions per place. [2022-07-22 21:34:24,661 INFO L132 encePairwiseOnDemand]: 336/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/338 dead transitions. [2022-07-22 21:34:24,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 338 transitions, 740 flow [2022-07-22 21:34:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2022-07-22 21:34:24,662 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8678304239401496 [2022-07-22 21:34:24,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2022-07-22 21:34:24,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2022-07-22 21:34:24,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:24,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2022-07-22 21:34:24,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,665 INFO L186 Difference]: Start difference. First operand has 333 places, 401 transitions, 832 flow. Second operand 3 states and 1044 transitions. [2022-07-22 21:34:24,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 338 transitions, 740 flow [2022-07-22 21:34:24,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 338 transitions, 740 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:24,669 INFO L242 Difference]: Finished difference. Result has 331 places, 335 transitions, 710 flow [2022-07-22 21:34:24,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=331, PETRI_TRANSITIONS=335} [2022-07-22 21:34:24,670 INFO L279 CegarLoopForPetriNet]: 333 programPoint places, -2 predicate places. [2022-07-22 21:34:24,670 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 335 transitions, 710 flow [2022-07-22 21:34:24,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:24,670 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:24,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:34:24,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash 798570601, now seen corresponding path program 1 times [2022-07-22 21:34:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:24,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328999613] [2022-07-22 21:34:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:24,690 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 21:34:24,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:24,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328999613] [2022-07-22 21:34:24,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328999613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:24,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419818651] [2022-07-22 21:34:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:24,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:24,692 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 21:34:24,693 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 21:34:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 21:34:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:24,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:24,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419818651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:24,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:24,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:34:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947644740] [2022-07-22 21:34:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:24,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:24,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:24,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:34:24,766 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-07-22 21:34:24,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 335 transitions, 710 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:24,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-07-22 21:34:24,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:24,851 INFO L129 PetriNetUnfolder]: 23/654 cut-off events. [2022-07-22 21:34:24,851 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-07-22 21:34:24,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 654 events. 23/654 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3512 event pairs, 1 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 686. Up to 30 conditions per place. [2022-07-22 21:34:24,861 INFO L132 encePairwiseOnDemand]: 398/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/339 dead transitions. [2022-07-22 21:34:24,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 339 transitions, 752 flow [2022-07-22 21:34:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-07-22 21:34:24,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8154613466334164 [2022-07-22 21:34:24,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-07-22 21:34:24,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-07-22 21:34:24,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:24,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-07-22 21:34:24,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,864 INFO L186 Difference]: Start difference. First operand has 331 places, 335 transitions, 710 flow. Second operand 3 states and 981 transitions. [2022-07-22 21:34:24,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 339 transitions, 752 flow [2022-07-22 21:34:24,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 339 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:24,868 INFO L242 Difference]: Finished difference. Result has 333 places, 336 transitions, 720 flow [2022-07-22 21:34:24,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=720, PETRI_PLACES=333, PETRI_TRANSITIONS=336} [2022-07-22 21:34:24,869 INFO L279 CegarLoopForPetriNet]: 333 programPoint places, 0 predicate places. [2022-07-22 21:34:24,869 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 336 transitions, 720 flow [2022-07-22 21:34:24,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:24,870 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:24,870 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] [2022-07-22 21:34:24,889 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 21:34:25,083 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,SelfDestructingSolverStorable13 [2022-07-22 21:34:25,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1599524314, now seen corresponding path program 1 times [2022-07-22 21:34:25,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:25,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374397819] [2022-07-22 21:34:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:25,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:25,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374397819] [2022-07-22 21:34:25,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374397819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135679747] [2022-07-22 21:34:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:25,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:25,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:25,107 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 21:34:25,137 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 21:34:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 21:34:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:34:25,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:25,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135679747] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:25,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:34:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30256105] [2022-07-22 21:34:25,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:25,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:25,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:34:25,190 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-07-22 21:34:25,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 336 transitions, 720 flow. Second operand has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:25,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-07-22 21:34:25,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:25,308 INFO L129 PetriNetUnfolder]: 26/807 cut-off events. [2022-07-22 21:34:25,308 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:34:25,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 807 events. 26/807 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4008 event pairs, 1 based on Foata normal form. 0/769 useless extension candidates. Maximal degree in co-relation 852. Up to 36 conditions per place. [2022-07-22 21:34:25,319 INFO L132 encePairwiseOnDemand]: 398/401 looper letters, 16 selfloop transitions, 2 changer transitions 0/340 dead transitions. [2022-07-22 21:34:25,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 340 transitions, 764 flow [2022-07-22 21:34:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2022-07-22 21:34:25,321 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8137988362427265 [2022-07-22 21:34:25,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2022-07-22 21:34:25,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2022-07-22 21:34:25,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:25,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2022-07-22 21:34:25,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,324 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,324 INFO L186 Difference]: Start difference. First operand has 333 places, 336 transitions, 720 flow. Second operand 3 states and 979 transitions. [2022-07-22 21:34:25,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 340 transitions, 764 flow [2022-07-22 21:34:25,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 340 transitions, 762 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:25,328 INFO L242 Difference]: Finished difference. Result has 335 places, 337 transitions, 730 flow [2022-07-22 21:34:25,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=730, PETRI_PLACES=335, PETRI_TRANSITIONS=337} [2022-07-22 21:34:25,329 INFO L279 CegarLoopForPetriNet]: 333 programPoint places, 2 predicate places. [2022-07-22 21:34:25,329 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 337 transitions, 730 flow [2022-07-22 21:34:25,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,330 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:25,330 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] [2022-07-22 21:34:25,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:25,546 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,SelfDestructingSolverStorable14 [2022-07-22 21:34:25,547 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1194190247, now seen corresponding path program 1 times [2022-07-22 21:34:25,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:25,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439891263] [2022-07-22 21:34:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:25,568 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 21:34:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:25,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439891263] [2022-07-22 21:34:25,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439891263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:25,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737787711] [2022-07-22 21:34:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:25,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:25,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:25,570 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 21:34:25,575 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 21:34:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:25,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:25,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:25,661 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 21:34:25,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:25,678 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 21:34:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737787711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:25,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:25,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:25,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623621386] [2022-07-22 21:34:25,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:25,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:25,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:25,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:25,681 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-07-22 21:34:25,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 337 transitions, 730 flow. Second operand has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:25,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-07-22 21:34:25,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:25,862 INFO L129 PetriNetUnfolder]: 26/814 cut-off events. [2022-07-22 21:34:25,863 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-07-22 21:34:25,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 814 events. 26/814 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4002 event pairs, 1 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 835. Up to 20 conditions per place. [2022-07-22 21:34:25,873 INFO L132 encePairwiseOnDemand]: 395/401 looper letters, 16 selfloop transitions, 9 changer transitions 0/347 dead transitions. [2022-07-22 21:34:25,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 347 transitions, 802 flow [2022-07-22 21:34:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2907 transitions. [2022-07-22 21:34:25,875 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8054862842892768 [2022-07-22 21:34:25,875 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2907 transitions. [2022-07-22 21:34:25,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2907 transitions. [2022-07-22 21:34:25,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:25,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2907 transitions. [2022-07-22 21:34:25,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.0) internal successors, (2907), 9 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,882 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,882 INFO L186 Difference]: Start difference. First operand has 335 places, 337 transitions, 730 flow. Second operand 9 states and 2907 transitions. [2022-07-22 21:34:25,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 347 transitions, 802 flow [2022-07-22 21:34:25,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 347 transitions, 800 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:25,886 INFO L242 Difference]: Finished difference. Result has 345 places, 343 transitions, 778 flow [2022-07-22 21:34:25,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=345, PETRI_TRANSITIONS=343} [2022-07-22 21:34:25,887 INFO L279 CegarLoopForPetriNet]: 333 programPoint places, 12 predicate places. [2022-07-22 21:34:25,887 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 343 transitions, 778 flow [2022-07-22 21:34:25,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:25,888 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:25,888 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:25,906 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 21:34:26,101 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,SelfDestructingSolverStorable15 [2022-07-22 21:34:26,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:26,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:26,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1855352505, now seen corresponding path program 2 times [2022-07-22 21:34:26,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:26,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657201150] [2022-07-22 21:34:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:26,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:26,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:26,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657201150] [2022-07-22 21:34:26,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657201150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:26,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709310346] [2022-07-22 21:34:26,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:34:26,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:26,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:26,177 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 21:34:26,178 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 21:34:26,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:34:26,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:26,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:34:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:26,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-07-22 21:34:26,390 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:34:26,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:34:26,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-22 21:34:26,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-22 21:34:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 21:34:26,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:26,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709310346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:26,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:26,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2022-07-22 21:34:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553635682] [2022-07-22 21:34:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:26,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:34:26,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:34:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:34:26,536 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 401 [2022-07-22 21:34:26,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 343 transitions, 778 flow. Second operand has 12 states, 12 states have (on average 268.3333333333333) internal successors, (3220), 12 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:26,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:26,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 401 [2022-07-22 21:34:26,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand