./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/27_Boop_simple_vf.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/pthread-ext/27_Boop_simple_vf.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 ce64fcfa63b9df647c320ea90e20b624e2dad5b9ca256083b6d2f56c3177560a --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:19:08,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:19:08,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:19:08,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:19:08,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:19:08,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:19:08,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:19:08,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:19:08,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:19:08,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:19:08,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:19:08,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:19:08,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:19:08,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:19:08,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:19:08,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:19:08,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:19:08,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:19:08,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:19:08,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:19:08,851 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:19:08,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:19:08,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:19:08,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:19:08,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:19:08,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:19:08,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:19:08,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:19:08,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:19:08,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:19:08,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:19:08,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:19:08,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:19:08,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:19:08,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:19:08,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:19:08,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:19:08,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:19:08,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:19:08,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:19:08,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:19:08,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:19:08,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:19:08,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:19:08,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:19:08,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:19:08,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:19:08,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:19:08,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:19:08,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:19:08,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:19:08,918 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:19:08,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:19:08,919 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:19:08,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:19:08,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:19:08,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:19:08,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:19:08,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:19:08,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:19:08,921 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:19:08,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:19:08,921 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:19:08,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:19:08,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:19:08,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:19:08,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:19:08,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:19:08,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:19:08,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:19:08,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:19:08,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:19:08,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:19:08,924 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:19:08,924 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:19:08,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:19:08,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce64fcfa63b9df647c320ea90e20b624e2dad5b9ca256083b6d2f56c3177560a [2022-07-22 21:19:09,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:19:09,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:19:09,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:19:09,202 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:19:09,202 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:19:09,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/27_Boop_simple_vf.i [2022-07-22 21:19:09,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a64c4c3c/93bf6dad96bc4a118c2815eed81bd9b0/FLAG0057e00d7 [2022-07-22 21:19:09,799 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:19:09,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/27_Boop_simple_vf.i [2022-07-22 21:19:09,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a64c4c3c/93bf6dad96bc4a118c2815eed81bd9b0/FLAG0057e00d7 [2022-07-22 21:19:10,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a64c4c3c/93bf6dad96bc4a118c2815eed81bd9b0 [2022-07-22 21:19:10,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:19:10,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:19:10,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:19:10,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:19:10,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:19:10,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10, skipping insertion in model container [2022-07-22 21:19:10,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:19:10,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:19:10,500 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/pthread-ext/27_Boop_simple_vf.i[30297,30310] [2022-07-22 21:19:10,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:19:10,527 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:19:10,566 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/pthread-ext/27_Boop_simple_vf.i[30297,30310] [2022-07-22 21:19:10,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:19:10,608 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:19:10,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10 WrapperNode [2022-07-22 21:19:10,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:19:10,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:19:10,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:19:10,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:19:10,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,672 INFO L137 Inliner]: procedures = 170, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-07-22 21:19:10,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:19:10,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:19:10,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:19:10,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:19:10,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:19:10,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:19:10,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:19:10,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:19:10,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (1/1) ... [2022-07-22 21:19:10,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:19:10,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:19:10,761 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 21:19:10,779 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 21:19:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-22 21:19:10,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-22 21:19:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:19:10,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:19:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:19:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:19:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:19:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:19:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:19:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:19:10,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:19:10,804 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 21:19:10,962 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:19:10,964 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:19:11,121 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:19:11,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:19:11,128 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-22 21:19:11,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:19:11 BoogieIcfgContainer [2022-07-22 21:19:11,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:19:11,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:19:11,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:19:11,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:19:11,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:19:10" (1/3) ... [2022-07-22 21:19:11,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3e3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:19:11, skipping insertion in model container [2022-07-22 21:19:11,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:10" (2/3) ... [2022-07-22 21:19:11,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3e3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:19:11, skipping insertion in model container [2022-07-22 21:19:11,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:19:11" (3/3) ... [2022-07-22 21:19:11,140 INFO L111 eAbstractionObserver]: Analyzing ICFG 27_Boop_simple_vf.i [2022-07-22 21:19:11,146 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:19:11,154 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:19:11,155 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:19:11,155 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:19:11,222 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:11,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 91 transitions, 192 flow [2022-07-22 21:19:11,322 INFO L129 PetriNetUnfolder]: 13/101 cut-off events. [2022-07-22 21:19:11,322 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:19:11,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 101 events. 13/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 230 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2022-07-22 21:19:11,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 91 transitions, 192 flow [2022-07-22 21:19:11,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 90 transitions, 188 flow [2022-07-22 21:19:11,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:11,361 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@3253d4dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c27e257 [2022-07-22 21:19:11,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:19:11,395 INFO L129 PetriNetUnfolder]: 11/91 cut-off events. [2022-07-22 21:19:11,395 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:19:11,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:11,397 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] [2022-07-22 21:19:11,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:19:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash 601066750, now seen corresponding path program 1 times [2022-07-22 21:19:11,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:11,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102667311] [2022-07-22 21:19:11,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:11,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:11,556 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:11,602 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:11,605 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:11,605 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:19:11,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:19:11,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-22 21:19:11,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:19:11,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:19:11,609 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:19:11,612 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:11,612 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:19:11,644 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:11,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 131 places, 144 transitions, 312 flow [2022-07-22 21:19:11,663 INFO L129 PetriNetUnfolder]: 17/127 cut-off events. [2022-07-22 21:19:11,664 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:19:11,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 127 events. 17/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 303 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2022-07-22 21:19:11,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 144 transitions, 312 flow [2022-07-22 21:19:11,671 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 221 flow [2022-07-22 21:19:11,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:11,676 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@3253d4dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c27e257 [2022-07-22 21:19:11,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:19:11,692 INFO L129 PetriNetUnfolder]: 11/93 cut-off events. [2022-07-22 21:19:11,692 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:19:11,692 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:11,693 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] [2022-07-22 21:19:11,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:19:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -224229865, now seen corresponding path program 1 times [2022-07-22 21:19:11,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:11,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614227336] [2022-07-22 21:19:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:11,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:11,791 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 21:19:11,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:11,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614227336] [2022-07-22 21:19:11,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614227336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:11,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:11,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:19:11,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413701193] [2022-07-22 21:19:11,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:11,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:19:11,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:11,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:19:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:19:11,853 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 144 [2022-07-22 21:19:11,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 221 flow. Second operand has 2 states, 2 states have (on average 125.5) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:11,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:11,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 144 [2022-07-22 21:19:11,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:11,899 INFO L129 PetriNetUnfolder]: 7/98 cut-off events. [2022-07-22 21:19:11,899 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:19:11,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 98 events. 7/98 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 164 event pairs, 0 based on Foata normal form. 12/102 useless extension candidates. Maximal degree in co-relation 85. Up to 4 conditions per place. [2022-07-22 21:19:11,902 INFO L132 encePairwiseOnDemand]: 135/144 looper letters, 3 selfloop transitions, 0 changer transitions 0/88 dead transitions. [2022-07-22 21:19:11,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 197 flow [2022-07-22 21:19:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:19:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:19:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 260 transitions. [2022-07-22 21:19:11,922 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9027777777777778 [2022-07-22 21:19:11,924 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 260 transitions. [2022-07-22 21:19:11,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 260 transitions. [2022-07-22 21:19:11,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:11,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 260 transitions. [2022-07-22 21:19:11,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 130.0) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:11,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:11,951 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:11,953 INFO L186 Difference]: Start difference. First operand has 96 places, 103 transitions, 221 flow. Second operand 2 states and 260 transitions. [2022-07-22 21:19:11,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 197 flow [2022-07-22 21:19:11,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 194 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-22 21:19:11,963 INFO L242 Difference]: Finished difference. Result has 89 places, 88 transitions, 188 flow [2022-07-22 21:19:11,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=188, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2022-07-22 21:19:11,970 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -7 predicate places. [2022-07-22 21:19:11,970 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 188 flow [2022-07-22 21:19:11,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 125.5) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:11,971 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:11,973 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 21:19:11,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:19:11,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:19:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1229913594, now seen corresponding path program 1 times [2022-07-22 21:19:11,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:11,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386228966] [2022-07-22 21:19:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:11,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:12,037 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:12,074 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:12,078 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:12,079 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:19:12,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:19:12,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-22 21:19:12,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:19:12,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:19:12,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:19:12,085 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:19:12,085 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:12,086 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:19:12,121 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:12,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 177 places, 197 transitions, 436 flow [2022-07-22 21:19:12,149 INFO L129 PetriNetUnfolder]: 21/153 cut-off events. [2022-07-22 21:19:12,149 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:19:12,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 153 events. 21/153 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 369 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 167. Up to 8 conditions per place. [2022-07-22 21:19:12,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 197 transitions, 436 flow [2022-07-22 21:19:12,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 116 transitions, 256 flow [2022-07-22 21:19:12,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:12,156 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@3253d4dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c27e257 [2022-07-22 21:19:12,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:19:12,166 INFO L129 PetriNetUnfolder]: 14/99 cut-off events. [2022-07-22 21:19:12,167 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:19:12,167 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:12,167 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] [2022-07-22 21:19:12,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:19:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1264192635, now seen corresponding path program 1 times [2022-07-22 21:19:12,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:12,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079428247] [2022-07-22 21:19:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:12,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:12,198 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 21:19:12,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:12,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079428247] [2022-07-22 21:19:12,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079428247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:12,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:12,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:19:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959556667] [2022-07-22 21:19:12,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:12,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:19:12,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:19:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:19:12,202 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 197 [2022-07-22 21:19:12,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:12,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 197 [2022-07-22 21:19:12,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:12,225 INFO L129 PetriNetUnfolder]: 9/116 cut-off events. [2022-07-22 21:19:12,225 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-22 21:19:12,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 116 events. 9/116 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 19/125 useless extension candidates. Maximal degree in co-relation 109. Up to 5 conditions per place. [2022-07-22 21:19:12,227 INFO L132 encePairwiseOnDemand]: 187/197 looper letters, 4 selfloop transitions, 0 changer transitions 0/100 dead transitions. [2022-07-22 21:19:12,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 100 transitions, 232 flow [2022-07-22 21:19:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:19:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:19:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 350 transitions. [2022-07-22 21:19:12,230 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8883248730964467 [2022-07-22 21:19:12,230 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 350 transitions. [2022-07-22 21:19:12,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 350 transitions. [2022-07-22 21:19:12,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:12,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 350 transitions. [2022-07-22 21:19:12,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 175.0) internal successors, (350), 2 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,234 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,234 INFO L186 Difference]: Start difference. First operand has 108 places, 116 transitions, 256 flow. Second operand 2 states and 350 transitions. [2022-07-22 21:19:12,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 100 transitions, 232 flow [2022-07-22 21:19:12,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 225 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-22 21:19:12,237 INFO L242 Difference]: Finished difference. Result has 101 places, 100 transitions, 217 flow [2022-07-22 21:19:12,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=217, PETRI_PLACES=101, PETRI_TRANSITIONS=100} [2022-07-22 21:19:12,238 INFO L279 CegarLoopForPetriNet]: 108 programPoint places, -7 predicate places. [2022-07-22 21:19:12,239 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 100 transitions, 217 flow [2022-07-22 21:19:12,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,239 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:12,239 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] [2022-07-22 21:19:12,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:19:12,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:19:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash -971259791, now seen corresponding path program 1 times [2022-07-22 21:19:12,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:12,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486012170] [2022-07-22 21:19:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:12,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:12,308 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 21:19:12,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:12,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486012170] [2022-07-22 21:19:12,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486012170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:12,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:12,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:19:12,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47783279] [2022-07-22 21:19:12,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:12,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:19:12,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:19:12,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:19:12,316 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-22 21:19:12,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 100 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:12,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-22 21:19:12,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:12,415 INFO L129 PetriNetUnfolder]: 110/498 cut-off events. [2022-07-22 21:19:12,415 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-07-22 21:19:12,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 498 events. 110/498 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2613 event pairs, 14 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 704. Up to 91 conditions per place. [2022-07-22 21:19:12,427 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 11 selfloop transitions, 5 changer transitions 0/106 dead transitions. [2022-07-22 21:19:12,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 106 transitions, 271 flow [2022-07-22 21:19:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:19:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:19:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-07-22 21:19:12,431 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8307952622673435 [2022-07-22 21:19:12,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-07-22 21:19:12,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-07-22 21:19:12,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:12,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-07-22 21:19:12,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,443 INFO L186 Difference]: Start difference. First operand has 101 places, 100 transitions, 217 flow. Second operand 3 states and 491 transitions. [2022-07-22 21:19:12,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 106 transitions, 271 flow [2022-07-22 21:19:12,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 106 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:19:12,451 INFO L242 Difference]: Finished difference. Result has 105 places, 104 transitions, 255 flow [2022-07-22 21:19:12,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2022-07-22 21:19:12,453 INFO L279 CegarLoopForPetriNet]: 108 programPoint places, -3 predicate places. [2022-07-22 21:19:12,453 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 255 flow [2022-07-22 21:19:12,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,453 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:12,455 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-07-22 21:19:12,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:19:12,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:19:12,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:12,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1386061371, now seen corresponding path program 1 times [2022-07-22 21:19:12,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:12,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586334352] [2022-07-22 21:19:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:12,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:12,499 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:12,542 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:12,543 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:12,543 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:19:12,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:19:12,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-22 21:19:12,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:19:12,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:19:12,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:19:12,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:19:12,546 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:19:12,547 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:12,547 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:19:12,589 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:12,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 223 places, 250 transitions, 564 flow [2022-07-22 21:19:12,629 INFO L129 PetriNetUnfolder]: 25/179 cut-off events. [2022-07-22 21:19:12,629 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:19:12,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 179 events. 25/179 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 415 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 199. Up to 10 conditions per place. [2022-07-22 21:19:12,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 250 transitions, 564 flow [2022-07-22 21:19:12,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 129 transitions, 293 flow [2022-07-22 21:19:12,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:12,643 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@3253d4dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c27e257 [2022-07-22 21:19:12,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:19:12,655 INFO L129 PetriNetUnfolder]: 11/94 cut-off events. [2022-07-22 21:19:12,656 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:19:12,656 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:12,656 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] [2022-07-22 21:19:12,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:19:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:12,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1755240997, now seen corresponding path program 1 times [2022-07-22 21:19:12,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:12,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898753533] [2022-07-22 21:19:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:12,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:12,710 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 21:19:12,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:12,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898753533] [2022-07-22 21:19:12,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898753533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:12,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:12,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:19:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283185893] [2022-07-22 21:19:12,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:12,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:19:12,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:19:12,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:19:12,719 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 250 [2022-07-22 21:19:12,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 129 transitions, 293 flow. Second operand has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:12,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 250 [2022-07-22 21:19:12,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:12,759 INFO L129 PetriNetUnfolder]: 11/134 cut-off events. [2022-07-22 21:19:12,759 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-22 21:19:12,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 134 events. 11/134 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 227 event pairs, 0 based on Foata normal form. 27/149 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2022-07-22 21:19:12,761 INFO L132 encePairwiseOnDemand]: 239/250 looper letters, 5 selfloop transitions, 0 changer transitions 0/112 dead transitions. [2022-07-22 21:19:12,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 112 transitions, 269 flow [2022-07-22 21:19:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:19:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:19:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 440 transitions. [2022-07-22 21:19:12,763 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.88 [2022-07-22 21:19:12,764 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 440 transitions. [2022-07-22 21:19:12,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 440 transitions. [2022-07-22 21:19:12,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:12,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 440 transitions. [2022-07-22 21:19:12,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 220.0) internal successors, (440), 2 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,768 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,768 INFO L186 Difference]: Start difference. First operand has 120 places, 129 transitions, 293 flow. Second operand 2 states and 440 transitions. [2022-07-22 21:19:12,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 112 transitions, 269 flow [2022-07-22 21:19:12,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 112 transitions, 256 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:19:12,772 INFO L242 Difference]: Finished difference. Result has 113 places, 112 transitions, 246 flow [2022-07-22 21:19:12,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=113, PETRI_TRANSITIONS=112} [2022-07-22 21:19:12,774 INFO L279 CegarLoopForPetriNet]: 120 programPoint places, -7 predicate places. [2022-07-22 21:19:12,774 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 112 transitions, 246 flow [2022-07-22 21:19:12,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,774 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:12,775 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] [2022-07-22 21:19:12,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:19:12,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:19:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:12,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1518924113, now seen corresponding path program 1 times [2022-07-22 21:19:12,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:12,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830159971] [2022-07-22 21:19:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:12,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:12,834 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 21:19:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:12,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830159971] [2022-07-22 21:19:12,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830159971] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:12,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:12,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:19:12,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715080566] [2022-07-22 21:19:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:12,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:19:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:19:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:19:12,839 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 250 [2022-07-22 21:19:12,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 112 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:12,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:12,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 250 [2022-07-22 21:19:12,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:12,988 INFO L129 PetriNetUnfolder]: 290/1000 cut-off events. [2022-07-22 21:19:12,988 INFO L130 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-07-22 21:19:13,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1530 conditions, 1000 events. 290/1000 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6530 event pairs, 51 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 1523. Up to 262 conditions per place. [2022-07-22 21:19:13,025 INFO L132 encePairwiseOnDemand]: 243/250 looper letters, 14 selfloop transitions, 6 changer transitions 0/120 dead transitions. [2022-07-22 21:19:13,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 120 transitions, 317 flow [2022-07-22 21:19:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:19:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:19:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2022-07-22 21:19:13,028 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.824 [2022-07-22 21:19:13,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2022-07-22 21:19:13,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2022-07-22 21:19:13,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:13,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2022-07-22 21:19:13,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:13,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:13,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:13,033 INFO L186 Difference]: Start difference. First operand has 113 places, 112 transitions, 246 flow. Second operand 3 states and 618 transitions. [2022-07-22 21:19:13,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 120 transitions, 317 flow [2022-07-22 21:19:13,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 120 transitions, 317 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:19:13,037 INFO L242 Difference]: Finished difference. Result has 117 places, 117 transitions, 292 flow [2022-07-22 21:19:13,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2022-07-22 21:19:13,038 INFO L279 CegarLoopForPetriNet]: 120 programPoint places, -3 predicate places. [2022-07-22 21:19:13,038 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 292 flow [2022-07-22 21:19:13,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:13,039 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:13,039 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] [2022-07-22 21:19:13,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:19:13,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:19:13,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:13,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1429903636, now seen corresponding path program 1 times [2022-07-22 21:19:13,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:13,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220702840] [2022-07-22 21:19:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:13,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:13,114 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 21:19:13,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:13,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220702840] [2022-07-22 21:19:13,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220702840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:13,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:13,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:19:13,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148980999] [2022-07-22 21:19:13,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:13,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:19:13,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:19:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:19:13,119 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 250 [2022-07-22 21:19:13,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:13,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:13,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 250 [2022-07-22 21:19:13,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:14,518 INFO L129 PetriNetUnfolder]: 2655/9062 cut-off events. [2022-07-22 21:19:14,519 INFO L130 PetriNetUnfolder]: For 937/1096 co-relation queries the response was YES. [2022-07-22 21:19:14,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14173 conditions, 9062 events. 2655/9062 cut-off events. For 937/1096 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 102346 event pairs, 507 based on Foata normal form. 0/8117 useless extension candidates. Maximal degree in co-relation 14164. Up to 1516 conditions per place. [2022-07-22 21:19:14,678 INFO L132 encePairwiseOnDemand]: 240/250 looper letters, 21 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2022-07-22 21:19:14,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 139 transitions, 440 flow [2022-07-22 21:19:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:19:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:19:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 787 transitions. [2022-07-22 21:19:14,682 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.787 [2022-07-22 21:19:14,682 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 787 transitions. [2022-07-22 21:19:14,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 787 transitions. [2022-07-22 21:19:14,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:14,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 787 transitions. [2022-07-22 21:19:14,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:14,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:14,687 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:14,688 INFO L186 Difference]: Start difference. First operand has 117 places, 117 transitions, 292 flow. Second operand 4 states and 787 transitions. [2022-07-22 21:19:14,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 139 transitions, 440 flow [2022-07-22 21:19:14,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 139 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:19:14,704 INFO L242 Difference]: Finished difference. Result has 121 places, 132 transitions, 394 flow [2022-07-22 21:19:14,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=394, PETRI_PLACES=121, PETRI_TRANSITIONS=132} [2022-07-22 21:19:14,705 INFO L279 CegarLoopForPetriNet]: 120 programPoint places, 1 predicate places. [2022-07-22 21:19:14,705 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 132 transitions, 394 flow [2022-07-22 21:19:14,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:14,706 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:14,706 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] [2022-07-22 21:19:14,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:19:14,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:19:14,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:14,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1423107784, now seen corresponding path program 2 times [2022-07-22 21:19:14,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:14,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802717466] [2022-07-22 21:19:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:14,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:14,736 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 21:19:14,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:14,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802717466] [2022-07-22 21:19:14,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802717466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:14,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:14,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:19:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670726057] [2022-07-22 21:19:14,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:14,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:19:14,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:19:14,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:19:14,740 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 250 [2022-07-22 21:19:14,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 132 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:14,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:14,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 250 [2022-07-22 21:19:14,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:17,469 INFO L129 PetriNetUnfolder]: 4628/21779 cut-off events. [2022-07-22 21:19:17,469 INFO L130 PetriNetUnfolder]: For 2250/2508 co-relation queries the response was YES. [2022-07-22 21:19:17,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31700 conditions, 21779 events. 4628/21779 cut-off events. For 2250/2508 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 297261 event pairs, 434 based on Foata normal form. 0/18859 useless extension candidates. Maximal degree in co-relation 31689. Up to 1968 conditions per place. [2022-07-22 21:19:17,945 INFO L132 encePairwiseOnDemand]: 240/250 looper letters, 17 selfloop transitions, 6 changer transitions 0/138 dead transitions. [2022-07-22 21:19:17,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 138 transitions, 462 flow [2022-07-22 21:19:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:19:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:19:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2022-07-22 21:19:17,948 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.832 [2022-07-22 21:19:17,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2022-07-22 21:19:17,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2022-07-22 21:19:17,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:17,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2022-07-22 21:19:17,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:17,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:17,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:17,954 INFO L186 Difference]: Start difference. First operand has 121 places, 132 transitions, 394 flow. Second operand 3 states and 624 transitions. [2022-07-22 21:19:17,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 138 transitions, 462 flow [2022-07-22 21:19:18,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 138 transitions, 460 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:19:18,092 INFO L242 Difference]: Finished difference. Result has 125 places, 134 transitions, 428 flow [2022-07-22 21:19:18,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2022-07-22 21:19:18,093 INFO L279 CegarLoopForPetriNet]: 120 programPoint places, 5 predicate places. [2022-07-22 21:19:18,094 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 428 flow [2022-07-22 21:19:18,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,094 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:18,095 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 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 21:19:18,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:19:18,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:19:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:18,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2059888822, now seen corresponding path program 1 times [2022-07-22 21:19:18,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:18,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094737954] [2022-07-22 21:19:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:18,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:18,129 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:18,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:18,153 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:18,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-22 21:19:18,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-22 21:19:18,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-07-22 21:19:18,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-22 21:19:18,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-22 21:19:18,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-22 21:19:18,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-22 21:19:18,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:19:18,155 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-07-22 21:19:18,156 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:18,156 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:19:18,201 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:18,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 269 places, 303 transitions, 696 flow [2022-07-22 21:19:18,228 INFO L129 PetriNetUnfolder]: 29/205 cut-off events. [2022-07-22 21:19:18,228 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:19:18,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 205 events. 29/205 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 486 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 232. Up to 12 conditions per place. [2022-07-22 21:19:18,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 303 transitions, 696 flow [2022-07-22 21:19:18,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 142 transitions, 332 flow [2022-07-22 21:19:18,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:18,238 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@3253d4dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c27e257 [2022-07-22 21:19:18,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-22 21:19:18,245 INFO L129 PetriNetUnfolder]: 14/99 cut-off events. [2022-07-22 21:19:18,245 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:19:18,245 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:18,246 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] [2022-07-22 21:19:18,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-07-22 21:19:18,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash -614798821, now seen corresponding path program 1 times [2022-07-22 21:19:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:18,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141768389] [2022-07-22 21:19:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:18,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:18,278 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 21:19:18,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:18,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141768389] [2022-07-22 21:19:18,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141768389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:18,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:18,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:19:18,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814947083] [2022-07-22 21:19:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:18,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:19:18,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:19:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:19:18,282 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 303 [2022-07-22 21:19:18,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 142 transitions, 332 flow. Second operand has 2 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:18,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 303 [2022-07-22 21:19:18,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:18,314 INFO L129 PetriNetUnfolder]: 13/152 cut-off events. [2022-07-22 21:19:18,314 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-07-22 21:19:18,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 152 events. 13/152 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 252 event pairs, 0 based on Foata normal form. 36/174 useless extension candidates. Maximal degree in co-relation 160. Up to 7 conditions per place. [2022-07-22 21:19:18,316 INFO L132 encePairwiseOnDemand]: 291/303 looper letters, 6 selfloop transitions, 0 changer transitions 0/124 dead transitions. [2022-07-22 21:19:18,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 124 transitions, 308 flow [2022-07-22 21:19:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:19:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:19:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 530 transitions. [2022-07-22 21:19:18,319 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8745874587458746 [2022-07-22 21:19:18,319 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 530 transitions. [2022-07-22 21:19:18,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 530 transitions. [2022-07-22 21:19:18,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:18,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 530 transitions. [2022-07-22 21:19:18,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 265.0) internal successors, (530), 2 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 303.0) internal successors, (909), 3 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,323 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 303.0) internal successors, (909), 3 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,323 INFO L186 Difference]: Start difference. First operand has 132 places, 142 transitions, 332 flow. Second operand 2 states and 530 transitions. [2022-07-22 21:19:18,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 124 transitions, 308 flow [2022-07-22 21:19:18,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 124 transitions, 287 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-22 21:19:18,327 INFO L242 Difference]: Finished difference. Result has 125 places, 124 transitions, 275 flow [2022-07-22 21:19:18,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=275, PETRI_PLACES=125, PETRI_TRANSITIONS=124} [2022-07-22 21:19:18,329 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, -7 predicate places. [2022-07-22 21:19:18,329 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 124 transitions, 275 flow [2022-07-22 21:19:18,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:18,330 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] [2022-07-22 21:19:18,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:19:18,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-07-22 21:19:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:18,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1700465937, now seen corresponding path program 1 times [2022-07-22 21:19:18,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:18,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860257895] [2022-07-22 21:19:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:18,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:18,373 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 21:19:18,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:18,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860257895] [2022-07-22 21:19:18,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860257895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:18,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:18,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:19:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146087354] [2022-07-22 21:19:18,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:18,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:19:18,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:19:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:19:18,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 303 [2022-07-22 21:19:18,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 124 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:18,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 303 [2022-07-22 21:19:18,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:18,646 INFO L129 PetriNetUnfolder]: 712/1960 cut-off events. [2022-07-22 21:19:18,646 INFO L130 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2022-07-22 21:19:18,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3206 conditions, 1960 events. 712/1960 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14065 event pairs, 162 based on Foata normal form. 0/1761 useless extension candidates. Maximal degree in co-relation 3198. Up to 679 conditions per place. [2022-07-22 21:19:18,686 INFO L132 encePairwiseOnDemand]: 295/303 looper letters, 17 selfloop transitions, 7 changer transitions 0/134 dead transitions. [2022-07-22 21:19:18,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 134 transitions, 363 flow [2022-07-22 21:19:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:19:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:19:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2022-07-22 21:19:18,690 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8195819581958196 [2022-07-22 21:19:18,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2022-07-22 21:19:18,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2022-07-22 21:19:18,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:18,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2022-07-22 21:19:18,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,695 INFO L186 Difference]: Start difference. First operand has 125 places, 124 transitions, 275 flow. Second operand 3 states and 745 transitions. [2022-07-22 21:19:18,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 134 transitions, 363 flow [2022-07-22 21:19:18,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 134 transitions, 363 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:19:18,699 INFO L242 Difference]: Finished difference. Result has 129 places, 130 transitions, 329 flow [2022-07-22 21:19:18,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=129, PETRI_TRANSITIONS=130} [2022-07-22 21:19:18,700 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, -3 predicate places. [2022-07-22 21:19:18,701 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 130 transitions, 329 flow [2022-07-22 21:19:18,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,701 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:18,701 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] [2022-07-22 21:19:18,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:19:18,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-07-22 21:19:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:18,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1172415374, now seen corresponding path program 1 times [2022-07-22 21:19:18,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:18,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735779925] [2022-07-22 21:19:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:18,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:18,744 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 21:19:18,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735779925] [2022-07-22 21:19:18,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735779925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:18,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:18,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:19:18,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849736227] [2022-07-22 21:19:18,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:18,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:19:18,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:19:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:19:18,751 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 303 [2022-07-22 21:19:18,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 130 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:18,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:18,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 303 [2022-07-22 21:19:18,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:21,037 INFO L129 PetriNetUnfolder]: 6348/21743 cut-off events. [2022-07-22 21:19:21,038 INFO L130 PetriNetUnfolder]: For 1373/1549 co-relation queries the response was YES. [2022-07-22 21:19:21,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32466 conditions, 21743 events. 6348/21743 cut-off events. For 1373/1549 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 275044 event pairs, 1015 based on Foata normal form. 0/18956 useless extension candidates. Maximal degree in co-relation 32456. Up to 3416 conditions per place. [2022-07-22 21:19:21,613 INFO L132 encePairwiseOnDemand]: 291/303 looper letters, 21 selfloop transitions, 7 changer transitions 0/140 dead transitions. [2022-07-22 21:19:21,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 140 transitions, 428 flow [2022-07-22 21:19:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:19:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:19:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2022-07-22 21:19:21,616 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8283828382838284 [2022-07-22 21:19:21,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2022-07-22 21:19:21,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2022-07-22 21:19:21,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:21,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2022-07-22 21:19:21,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:21,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:21,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:21,623 INFO L186 Difference]: Start difference. First operand has 129 places, 130 transitions, 329 flow. Second operand 3 states and 753 transitions. [2022-07-22 21:19:21,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 140 transitions, 428 flow [2022-07-22 21:19:21,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 140 transitions, 414 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:19:21,640 INFO L242 Difference]: Finished difference. Result has 131 places, 135 transitions, 373 flow [2022-07-22 21:19:21,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=373, PETRI_PLACES=131, PETRI_TRANSITIONS=135} [2022-07-22 21:19:21,642 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, -1 predicate places. [2022-07-22 21:19:21,642 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 135 transitions, 373 flow [2022-07-22 21:19:21,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:21,643 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:21,643 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] [2022-07-22 21:19:21,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:19:21,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-07-22 21:19:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash 318984116, now seen corresponding path program 2 times [2022-07-22 21:19:21,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:21,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024047780] [2022-07-22 21:19:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:21,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:21,730 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 21:19:21,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:21,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024047780] [2022-07-22 21:19:21,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024047780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:21,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:21,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:19:21,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506025180] [2022-07-22 21:19:21,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:21,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:19:21,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:19:21,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:19:21,734 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 303 [2022-07-22 21:19:21,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 135 transitions, 373 flow. Second operand has 4 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:21,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:21,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 303 [2022-07-22 21:19:21,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:27,082 INFO L129 PetriNetUnfolder]: 13779/45620 cut-off events. [2022-07-22 21:19:27,083 INFO L130 PetriNetUnfolder]: For 3270/3270 co-relation queries the response was YES. [2022-07-22 21:19:27,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68228 conditions, 45620 events. 13779/45620 cut-off events. For 3270/3270 co-relation queries the response was YES. Maximal size of possible extension queue 2072. Compared 624391 event pairs, 2292 based on Foata normal form. 0/39031 useless extension candidates. Maximal degree in co-relation 68217. Up to 6869 conditions per place. [2022-07-22 21:19:27,988 INFO L132 encePairwiseOnDemand]: 293/303 looper letters, 25 selfloop transitions, 16 changer transitions 0/159 dead transitions. [2022-07-22 21:19:27,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 159 transitions, 543 flow [2022-07-22 21:19:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:19:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:19:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 943 transitions. [2022-07-22 21:19:27,991 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.778052805280528 [2022-07-22 21:19:27,991 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 943 transitions. [2022-07-22 21:19:27,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 943 transitions. [2022-07-22 21:19:27,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:27,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 943 transitions. [2022-07-22 21:19:27,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:27,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:27,997 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:27,998 INFO L186 Difference]: Start difference. First operand has 131 places, 135 transitions, 373 flow. Second operand 4 states and 943 transitions. [2022-07-22 21:19:27,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 159 transitions, 543 flow [2022-07-22 21:19:28,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 159 transitions, 529 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:19:28,004 INFO L242 Difference]: Finished difference. Result has 135 places, 150 transitions, 473 flow [2022-07-22 21:19:28,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=473, PETRI_PLACES=135, PETRI_TRANSITIONS=150} [2022-07-22 21:19:28,006 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 3 predicate places. [2022-07-22 21:19:28,006 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 150 transitions, 473 flow [2022-07-22 21:19:28,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:28,007 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:28,007 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:19:28,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:19:28,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-07-22 21:19:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash 803676169, now seen corresponding path program 1 times [2022-07-22 21:19:28,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:28,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438861014] [2022-07-22 21:19:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:28,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:28,046 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 21:19:28,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:28,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438861014] [2022-07-22 21:19:28,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438861014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:28,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:28,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:19:28,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972758471] [2022-07-22 21:19:28,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:28,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:19:28,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:28,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:19:28,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:19:28,052 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 303 [2022-07-22 21:19:28,053 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 473 flow. Second operand has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:28,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:28,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 303 [2022-07-22 21:19:28,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:42,314 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1282] L702-1-->L703-1: Formula: (= v_~usecount~0_3 (+ (- 1) v_~usecount~0_4)) InVars {~usecount~0=v_~usecount~0_4} OutVars{~usecount~0=v_~usecount~0_3} AuxVars[] AssignedVars[~usecount~0][130], [thr2Thread3of5ForFork0InUse, thr2Thread4of5ForFork0InUse, 114#L694true, Black: 289#(= ~usecount~0 0), thr2Thread5of5ForFork0InUse, Black: 290#(and (<= 1 ~usecount~0) (<= ~usecount~0 1)), thr1Thread1of5ForFork1InUse, 73#L694true, 77#L694true, 131#L746-6true, 183#L703-1true, 124#L694true, 297#(= 1 ~release_thr1~0), Black: 277#(= ~flag1~0 0), 28#L698true, thr2Thread1of5ForFork0InUse, 272#true, Black: 283#(= 0 ~release_thr1~0), thr2Thread2of5ForFork0InUse, 287#true]) [2022-07-22 21:19:42,314 INFO L384 tUnfolder$Statistics]: this new event has 101 ancestors and is cut-off event [2022-07-22 21:19:42,314 INFO L387 tUnfolder$Statistics]: existing Event has 91 ancestors and is cut-off event [2022-07-22 21:19:42,314 INFO L387 tUnfolder$Statistics]: existing Event has 92 ancestors and is cut-off event [2022-07-22 21:19:42,314 INFO L387 tUnfolder$Statistics]: existing Event has 92 ancestors and is cut-off event [2022-07-22 21:19:44,233 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([1138] L697-->L698: Formula: (= v_~flag1~0_1 1) InVars {} OutVars{~flag1~0=v_~flag1~0_1} AuxVars[] AssignedVars[~flag1~0][145], [thr2Thread3of5ForFork0InUse, thr2Thread4of5ForFork0InUse, Black: 289#(= ~usecount~0 0), thr2Thread5of5ForFork0InUse, thr1Thread1of5ForFork1InUse, Black: 287#true, 107#L713true, 131#L746-6true, 290#(and (<= 1 ~usecount~0) (<= ~usecount~0 1)), 209#L698true, 115#L698true, 297#(= 1 ~release_thr1~0), 90#L698true, Black: 277#(= ~flag1~0 0), 28#L698true, thr2Thread1of5ForFork0InUse, 272#true, 68#L692-3true, thr2Thread2of5ForFork0InUse, Black: 283#(= 0 ~release_thr1~0)]) [2022-07-22 21:19:44,233 INFO L384 tUnfolder$Statistics]: this new event has 103 ancestors and is cut-off event [2022-07-22 21:19:44,234 INFO L387 tUnfolder$Statistics]: existing Event has 103 ancestors and is cut-off event [2022-07-22 21:19:44,234 INFO L387 tUnfolder$Statistics]: existing Event has 103 ancestors and is cut-off event [2022-07-22 21:19:44,234 INFO L387 tUnfolder$Statistics]: existing Event has 103 ancestors and is cut-off event [2022-07-22 21:19:49,125 INFO L129 PetriNetUnfolder]: 65984/190082 cut-off events. [2022-07-22 21:19:49,125 INFO L130 PetriNetUnfolder]: For 48058/49599 co-relation queries the response was YES. [2022-07-22 21:19:51,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346736 conditions, 190082 events. 65984/190082 cut-off events. For 48058/49599 co-relation queries the response was YES. Maximal size of possible extension queue 7437. Compared 2926932 event pairs, 12022 based on Foata normal form. 0/169159 useless extension candidates. Maximal degree in co-relation 346723. Up to 28833 conditions per place. [2022-07-22 21:19:53,132 INFO L132 encePairwiseOnDemand]: 293/303 looper letters, 36 selfloop transitions, 4 changer transitions 0/162 dead transitions. [2022-07-22 21:19:53,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 162 transitions, 620 flow [2022-07-22 21:19:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:19:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:19:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 991 transitions. [2022-07-22 21:19:53,136 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8176567656765676 [2022-07-22 21:19:53,136 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 991 transitions. [2022-07-22 21:19:53,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 991 transitions. [2022-07-22 21:19:53,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:53,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 991 transitions. [2022-07-22 21:19:53,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 247.75) internal successors, (991), 4 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:53,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:53,142 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:19:53,143 INFO L186 Difference]: Start difference. First operand has 135 places, 150 transitions, 473 flow. Second operand 4 states and 991 transitions. [2022-07-22 21:19:53,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 162 transitions, 620 flow [2022-07-22 21:20:02,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 162 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:02,703 INFO L242 Difference]: Finished difference. Result has 140 places, 148 transitions, 482 flow [2022-07-22 21:20:02,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=482, PETRI_PLACES=140, PETRI_TRANSITIONS=148} [2022-07-22 21:20:02,704 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 8 predicate places. [2022-07-22 21:20:02,704 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 148 transitions, 482 flow [2022-07-22 21:20:02,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:02,705 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:02,705 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 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 21:20:02,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:20:02,706 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-07-22 21:20:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1110948404, now seen corresponding path program 1 times [2022-07-22 21:20:02,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:02,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828743161] [2022-07-22 21:20:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:02,722 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:20:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:20:02,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:20:02,736 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:20:02,736 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-07-22 21:20:02,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-07-22 21:20:02,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2022-07-22 21:20:02,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-07-22 21:20:02,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-07-22 21:20:02,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-07-22 21:20:02,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-07-22 21:20:02,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-07-22 21:20:02,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:20:02,738 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-07-22 21:20:02,739 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:20:02,739 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-22 21:20:02,771 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:20:02,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 315 places, 356 transitions, 832 flow [2022-07-22 21:20:02,796 INFO L129 PetriNetUnfolder]: 33/231 cut-off events. [2022-07-22 21:20:02,796 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:20:02,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 231 events. 33/231 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 526 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 266. Up to 14 conditions per place. [2022-07-22 21:20:02,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 315 places, 356 transitions, 832 flow [2022-07-22 21:20:02,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 155 transitions, 373 flow [2022-07-22 21:20:02,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:20:02,803 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@3253d4dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c27e257 [2022-07-22 21:20:02,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-22 21:20:02,808 INFO L129 PetriNetUnfolder]: 15/101 cut-off events. [2022-07-22 21:20:02,809 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:20:02,809 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:02,809 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] [2022-07-22 21:20:02,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-22 21:20:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:02,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1795830455, now seen corresponding path program 1 times [2022-07-22 21:20:02,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:02,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179315018] [2022-07-22 21:20:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:02,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:02,823 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 21:20:02,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179315018] [2022-07-22 21:20:02,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179315018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:02,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:02,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:20:02,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733721786] [2022-07-22 21:20:02,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:02,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:20:02,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:20:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:20:02,827 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 356 [2022-07-22 21:20:02,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 155 transitions, 373 flow. Second operand has 2 states, 2 states have (on average 301.5) internal successors, (603), 2 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:02,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:02,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 356 [2022-07-22 21:20:02,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:02,851 INFO L129 PetriNetUnfolder]: 15/170 cut-off events. [2022-07-22 21:20:02,852 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-07-22 21:20:02,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 170 events. 15/170 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 278 event pairs, 0 based on Foata normal form. 46/200 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2022-07-22 21:20:02,854 INFO L132 encePairwiseOnDemand]: 343/356 looper letters, 7 selfloop transitions, 0 changer transitions 0/136 dead transitions. [2022-07-22 21:20:02,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 136 transitions, 349 flow [2022-07-22 21:20:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:20:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:20:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 620 transitions. [2022-07-22 21:20:02,856 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8707865168539326 [2022-07-22 21:20:02,856 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 620 transitions. [2022-07-22 21:20:02,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 620 transitions. [2022-07-22 21:20:02,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:02,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 620 transitions. [2022-07-22 21:20:02,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 310.0) internal successors, (620), 2 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:02,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:02,860 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:02,860 INFO L186 Difference]: Start difference. First operand has 144 places, 155 transitions, 373 flow. Second operand 2 states and 620 transitions. [2022-07-22 21:20:02,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 136 transitions, 349 flow [2022-07-22 21:20:02,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 136 transitions, 318 flow, removed 15 selfloop flow, removed 1 redundant places. [2022-07-22 21:20:02,863 INFO L242 Difference]: Finished difference. Result has 137 places, 136 transitions, 304 flow [2022-07-22 21:20:02,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=304, PETRI_PLACES=137, PETRI_TRANSITIONS=136} [2022-07-22 21:20:02,864 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, -7 predicate places. [2022-07-22 21:20:02,864 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 136 transitions, 304 flow [2022-07-22 21:20:02,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 301.5) internal successors, (603), 2 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:02,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:02,865 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] [2022-07-22 21:20:02,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:20:02,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-22 21:20:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1430613377, now seen corresponding path program 1 times [2022-07-22 21:20:02,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:02,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775433211] [2022-07-22 21:20:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:02,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:02,890 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 21:20:02,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775433211] [2022-07-22 21:20:02,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775433211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:02,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:02,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:20:02,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783401380] [2022-07-22 21:20:02,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:02,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:02,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:02,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 356 [2022-07-22 21:20:02,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 136 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:02,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:02,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 356 [2022-07-22 21:20:02,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:03,260 INFO L129 PetriNetUnfolder]: 1680/3858 cut-off events. [2022-07-22 21:20:03,260 INFO L130 PetriNetUnfolder]: For 715/715 co-relation queries the response was YES. [2022-07-22 21:20:03,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6682 conditions, 3858 events. 1680/3858 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 28909 event pairs, 467 based on Foata normal form. 0/3497 useless extension candidates. Maximal degree in co-relation 6673. Up to 1654 conditions per place. [2022-07-22 21:20:03,331 INFO L132 encePairwiseOnDemand]: 347/356 looper letters, 20 selfloop transitions, 8 changer transitions 0/148 dead transitions. [2022-07-22 21:20:03,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 148 transitions, 409 flow [2022-07-22 21:20:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:20:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:20:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2022-07-22 21:20:03,334 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8164794007490637 [2022-07-22 21:20:03,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2022-07-22 21:20:03,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2022-07-22 21:20:03,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:03,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2022-07-22 21:20:03,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:03,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:03,339 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:03,339 INFO L186 Difference]: Start difference. First operand has 137 places, 136 transitions, 304 flow. Second operand 3 states and 872 transitions. [2022-07-22 21:20:03,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 148 transitions, 409 flow [2022-07-22 21:20:03,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 148 transitions, 409 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:20:03,343 INFO L242 Difference]: Finished difference. Result has 141 places, 143 transitions, 366 flow [2022-07-22 21:20:03,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=366, PETRI_PLACES=141, PETRI_TRANSITIONS=143} [2022-07-22 21:20:03,344 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, -3 predicate places. [2022-07-22 21:20:03,344 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 143 transitions, 366 flow [2022-07-22 21:20:03,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:03,345 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:03,345 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] [2022-07-22 21:20:03,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:20:03,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-22 21:20:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1556241143, now seen corresponding path program 1 times [2022-07-22 21:20:03,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:03,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738377518] [2022-07-22 21:20:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:03,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:03,421 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 21:20:03,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:03,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738377518] [2022-07-22 21:20:03,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738377518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:03,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:03,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:20:03,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534309147] [2022-07-22 21:20:03,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:03,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:20:03,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:03,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:20:03,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:20:03,425 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 356 [2022-07-22 21:20:03,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 143 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 264.75) internal successors, (1059), 4 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:03,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:03,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 356 [2022-07-22 21:20:03,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:20:12,225 INFO L129 PetriNetUnfolder]: 33154/83154 cut-off events. [2022-07-22 21:20:12,225 INFO L130 PetriNetUnfolder]: For 7651/9953 co-relation queries the response was YES. [2022-07-22 21:20:13,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140549 conditions, 83154 events. 33154/83154 cut-off events. For 7651/9953 co-relation queries the response was YES. Maximal size of possible extension queue 4715. Compared 1118667 event pairs, 9790 based on Foata normal form. 0/74594 useless extension candidates. Maximal degree in co-relation 140538. Up to 25143 conditions per place. [2022-07-22 21:20:14,315 INFO L132 encePairwiseOnDemand]: 344/356 looper letters, 29 selfloop transitions, 20 changer transitions 0/173 dead transitions. [2022-07-22 21:20:14,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 173 transitions, 574 flow [2022-07-22 21:20:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:20:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:20:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1103 transitions. [2022-07-22 21:20:14,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7745786516853933 [2022-07-22 21:20:14,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1103 transitions. [2022-07-22 21:20:14,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1103 transitions. [2022-07-22 21:20:14,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:20:14,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1103 transitions. [2022-07-22 21:20:14,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 275.75) internal successors, (1103), 4 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,325 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,325 INFO L186 Difference]: Start difference. First operand has 141 places, 143 transitions, 366 flow. Second operand 4 states and 1103 transitions. [2022-07-22 21:20:14,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 173 transitions, 574 flow [2022-07-22 21:20:14,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 173 transitions, 558 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:20:14,481 INFO L242 Difference]: Finished difference. Result has 145 places, 162 transitions, 492 flow [2022-07-22 21:20:14,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=492, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2022-07-22 21:20:14,482 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, 1 predicate places. [2022-07-22 21:20:14,482 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 492 flow [2022-07-22 21:20:14,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 264.75) internal successors, (1059), 4 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:20:14,483 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] [2022-07-22 21:20:14,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:20:14,484 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-22 21:20:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:20:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1463613459, now seen corresponding path program 2 times [2022-07-22 21:20:14,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:20:14,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752714132] [2022-07-22 21:20:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:20:14,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:20:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:20:14,524 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 21:20:14,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:20:14,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752714132] [2022-07-22 21:20:14,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752714132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:20:14,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:20:14,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:20:14,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84269146] [2022-07-22 21:20:14,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:20:14,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:20:14,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:20:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:20:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:20:14,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 356 [2022-07-22 21:20:14,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 492 flow. Second operand has 3 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:20:14,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:20:14,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 356 [2022-07-22 21:20:14,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand