./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:21:12,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:21:12,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:21:12,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:21:12,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:21:12,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:21:12,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:21:12,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:21:12,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:21:12,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:21:12,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:21:12,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:21:12,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:21:12,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:21:12,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:21:12,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:21:12,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:21:12,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:21:12,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:21:12,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:21:12,883 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:21:12,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:21:12,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:21:12,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:21:12,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:21:12,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:21:12,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:21:12,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:21:12,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:21:12,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:21:12,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:21:12,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:21:12,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:21:12,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:21:12,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:21:12,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:21:12,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:21:12,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:21:12,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:21:12,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:21:12,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:21:12,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:21:12,903 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:21:12,937 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:21:12,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:21:12,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:21:12,938 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:21:12,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:21:12,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:21:12,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:21:12,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:21:12,940 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:21:12,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:21:12,941 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:21:12,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:21:12,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:21:12,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:21:12,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:21:12,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:21:12,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:21:12,942 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:21:12,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:21:12,942 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:21:12,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:21:12,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:21:12,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:21:12,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:21:12,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:21:12,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:21:12,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:21:12,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:21:12,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:21:12,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:21:12,944 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:21:12,945 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:21:12,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:21:12,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-07-12 10:21:13,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:21:13,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:21:13,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:21:13,248 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:21:13,249 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:21:13,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-07-12 10:21:13,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9bcb0f2/a5ee532898b146188f40428fae535ee5/FLAG8584d885b [2022-07-12 10:21:13,802 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:21:13,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-07-12 10:21:13,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9bcb0f2/a5ee532898b146188f40428fae535ee5/FLAG8584d885b [2022-07-12 10:21:14,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9bcb0f2/a5ee532898b146188f40428fae535ee5 [2022-07-12 10:21:14,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:21:14,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:21:14,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:21:14,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:21:14,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:21:14,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60199298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14, skipping insertion in model container [2022-07-12 10:21:14,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:21:14,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:21:14,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-07-12 10:21:14,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:21:14,542 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:21:14,582 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-07-12 10:21:14,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:21:14,605 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:21:14,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14 WrapperNode [2022-07-12 10:21:14,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:21:14,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:21:14,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:21:14,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:21:14,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,668 INFO L137 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 281 [2022-07-12 10:21:14,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:21:14,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:21:14,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:21:14,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:21:14,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:21:14,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:21:14,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:21:14,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:21:14,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (1/1) ... [2022-07-12 10:21:14,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:21:14,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:14,754 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) [2022-07-12 10:21:14,756 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 [2022-07-12 10:21:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:21:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:21:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:21:14,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:21:14,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:21:14,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:21:14,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:21:14,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:21:14,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:21:14,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:21:14,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:21:14,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:21:14,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:21:14,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:21:14,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:21:14,785 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:21:14,867 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:21:14,884 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:21:15,259 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:21:15,270 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:21:15,271 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-12 10:21:15,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:21:15 BoogieIcfgContainer [2022-07-12 10:21:15,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:21:15,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:21:15,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:21:15,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:21:15,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:21:14" (1/3) ... [2022-07-12 10:21:15,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162ccedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:21:15, skipping insertion in model container [2022-07-12 10:21:15,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:14" (2/3) ... [2022-07-12 10:21:15,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162ccedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:21:15, skipping insertion in model container [2022-07-12 10:21:15,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:21:15" (3/3) ... [2022-07-12 10:21:15,281 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2022-07-12 10:21:15,286 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:21:15,294 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:21:15,295 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:21:15,295 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:21:15,388 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:21:15,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 339 places, 358 transitions, 740 flow [2022-07-12 10:21:15,549 INFO L129 PetriNetUnfolder]: 29/355 cut-off events. [2022-07-12 10:21:15,553 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:21:15,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 355 events. 29/355 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 584 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 269. Up to 3 conditions per place. [2022-07-12 10:21:15,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 358 transitions, 740 flow [2022-07-12 10:21:15,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 325 places, 344 transitions, 706 flow [2022-07-12 10:21:15,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:21:15,595 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@7d938fe5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@589de99e [2022-07-12 10:21:15,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:21:15,677 INFO L129 PetriNetUnfolder]: 29/343 cut-off events. [2022-07-12 10:21:15,678 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:21:15,678 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:15,679 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:15,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:21:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:15,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1953458268, now seen corresponding path program 1 times [2022-07-12 10:21:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:15,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812579153] [2022-07-12 10:21:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:15,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:15,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812579153] [2022-07-12 10:21:15,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812579153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:15,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:15,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:21:15,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324390290] [2022-07-12 10:21:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:15,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:21:15,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:21:15,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:21:15,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 358 [2022-07-12 10:21:15,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 344 transitions, 706 flow. Second operand has 2 states, 2 states have (on average 335.5) internal successors, (671), 2 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:15,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:15,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 358 [2022-07-12 10:21:16,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:16,075 INFO L129 PetriNetUnfolder]: 9/324 cut-off events. [2022-07-12 10:21:16,075 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-12 10:21:16,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 324 events. 9/324 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 563 event pairs, 0 based on Foata normal form. 26/327 useless extension candidates. Maximal degree in co-relation 256. Up to 7 conditions per place. [2022-07-12 10:21:16,079 INFO L132 encePairwiseOnDemand]: 338/358 looper letters, 6 selfloop transitions, 0 changer transitions 8/324 dead transitions. [2022-07-12 10:21:16,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 324 transitions, 678 flow [2022-07-12 10:21:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:21:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:21:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 688 transitions. [2022-07-12 10:21:16,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9608938547486033 [2022-07-12 10:21:16,094 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 688 transitions. [2022-07-12 10:21:16,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 688 transitions. [2022-07-12 10:21:16,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:16,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 688 transitions. [2022-07-12 10:21:16,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 344.0) internal successors, (688), 2 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:16,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:16,118 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:16,120 INFO L186 Difference]: Start difference. First operand has 325 places, 344 transitions, 706 flow. Second operand 2 states and 688 transitions. [2022-07-12 10:21:16,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 324 transitions, 678 flow [2022-07-12 10:21:16,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 324 transitions, 666 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:21:16,136 INFO L242 Difference]: Finished difference. Result has 320 places, 316 transitions, 638 flow [2022-07-12 10:21:16,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=638, PETRI_PLACES=320, PETRI_TRANSITIONS=316} [2022-07-12 10:21:16,143 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, -5 predicate places. [2022-07-12 10:21:16,143 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 316 transitions, 638 flow [2022-07-12 10:21:16,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 335.5) internal successors, (671), 2 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:16,144 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:16,145 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:16,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:21:16,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:21:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1280046237, now seen corresponding path program 1 times [2022-07-12 10:21:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:16,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100141902] [2022-07-12 10:21:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:17,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:17,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100141902] [2022-07-12 10:21:17,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100141902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:17,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:17,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-12 10:21:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864162982] [2022-07-12 10:21:17,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:17,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 10:21:17,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:17,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 10:21:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-07-12 10:21:17,243 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-12 10:21:17,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 316 transitions, 638 flow. Second operand has 27 states, 27 states have (on average 244.59259259259258) internal successors, (6604), 27 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:17,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:17,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-12 10:21:17,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:20,780 INFO L129 PetriNetUnfolder]: 1306/10262 cut-off events. [2022-07-12 10:21:20,781 INFO L130 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2022-07-12 10:21:20,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12162 conditions, 10262 events. 1306/10262 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 122732 event pairs, 714 based on Foata normal form. 1/9146 useless extension candidates. Maximal degree in co-relation 12159. Up to 418 conditions per place. [2022-07-12 10:21:20,876 INFO L132 encePairwiseOnDemand]: 321/358 looper letters, 222 selfloop transitions, 39 changer transitions 8/498 dead transitions. [2022-07-12 10:21:20,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 498 transitions, 1565 flow [2022-07-12 10:21:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 10:21:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-12 10:21:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8498 transitions. [2022-07-12 10:21:20,896 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.698159710811699 [2022-07-12 10:21:20,897 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8498 transitions. [2022-07-12 10:21:20,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8498 transitions. [2022-07-12 10:21:20,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:20,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8498 transitions. [2022-07-12 10:21:20,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 249.94117647058823) internal successors, (8498), 34 states have internal predecessors, (8498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:20,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 358.0) internal successors, (12530), 35 states have internal predecessors, (12530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:20,953 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 358.0) internal successors, (12530), 35 states have internal predecessors, (12530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:20,953 INFO L186 Difference]: Start difference. First operand has 320 places, 316 transitions, 638 flow. Second operand 34 states and 8498 transitions. [2022-07-12 10:21:20,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 498 transitions, 1565 flow [2022-07-12 10:21:20,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 498 transitions, 1565 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:21:20,964 INFO L242 Difference]: Finished difference. Result has 363 places, 343 transitions, 865 flow [2022-07-12 10:21:20,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=865, PETRI_PLACES=363, PETRI_TRANSITIONS=343} [2022-07-12 10:21:20,966 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 38 predicate places. [2022-07-12 10:21:20,967 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 343 transitions, 865 flow [2022-07-12 10:21:20,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 244.59259259259258) internal successors, (6604), 27 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:20,970 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:20,970 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:20,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:21:20,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:21:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 237870383, now seen corresponding path program 2 times [2022-07-12 10:21:20,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:20,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655956701] [2022-07-12 10:21:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:20,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655956701] [2022-07-12 10:21:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655956701] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:21,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-12 10:21:21,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585613797] [2022-07-12 10:21:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:21,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 10:21:21,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 10:21:21,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2022-07-12 10:21:21,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 358 [2022-07-12 10:21:21,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 343 transitions, 865 flow. Second operand has 28 states, 28 states have (on average 242.53571428571428) internal successors, (6791), 28 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:21,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:21,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 358 [2022-07-12 10:21:21,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:27,206 INFO L129 PetriNetUnfolder]: 2239/16958 cut-off events. [2022-07-12 10:21:27,207 INFO L130 PetriNetUnfolder]: For 1635/1707 co-relation queries the response was YES. [2022-07-12 10:21:27,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21437 conditions, 16958 events. 2239/16958 cut-off events. For 1635/1707 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 221359 event pairs, 1190 based on Foata normal form. 27/15038 useless extension candidates. Maximal degree in co-relation 21415. Up to 500 conditions per place. [2022-07-12 10:21:27,391 INFO L132 encePairwiseOnDemand]: 316/358 looper letters, 271 selfloop transitions, 52 changer transitions 8/558 dead transitions. [2022-07-12 10:21:27,392 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 558 transitions, 2122 flow [2022-07-12 10:21:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 10:21:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-12 10:21:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 10647 transitions. [2022-07-12 10:21:27,418 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.691633103806678 [2022-07-12 10:21:27,419 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 10647 transitions. [2022-07-12 10:21:27,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 10647 transitions. [2022-07-12 10:21:27,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:27,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 10647 transitions. [2022-07-12 10:21:27,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 247.6046511627907) internal successors, (10647), 43 states have internal predecessors, (10647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:27,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 358.0) internal successors, (15752), 44 states have internal predecessors, (15752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:27,497 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 358.0) internal successors, (15752), 44 states have internal predecessors, (15752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:27,497 INFO L186 Difference]: Start difference. First operand has 363 places, 343 transitions, 865 flow. Second operand 43 states and 10647 transitions. [2022-07-12 10:21:27,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 558 transitions, 2122 flow [2022-07-12 10:21:27,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 558 transitions, 2077 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-07-12 10:21:27,521 INFO L242 Difference]: Finished difference. Result has 408 places, 359 transitions, 1095 flow [2022-07-12 10:21:27,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1095, PETRI_PLACES=408, PETRI_TRANSITIONS=359} [2022-07-12 10:21:27,524 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 83 predicate places. [2022-07-12 10:21:27,525 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 359 transitions, 1095 flow [2022-07-12 10:21:27,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 242.53571428571428) internal successors, (6791), 28 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:27,527 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:27,527 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:27,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:21:27,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:21:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash -30815151, now seen corresponding path program 3 times [2022-07-12 10:21:27,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:27,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905985034] [2022-07-12 10:21:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:27,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:28,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:28,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905985034] [2022-07-12 10:21:28,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905985034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:28,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:28,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-12 10:21:28,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546129473] [2022-07-12 10:21:28,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:28,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:21:28,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:28,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:21:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-12 10:21:28,328 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 358 [2022-07-12 10:21:28,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 359 transitions, 1095 flow. Second operand has 24 states, 24 states have (on average 242.95833333333334) internal successors, (5831), 24 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:28,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:28,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 358 [2022-07-12 10:21:28,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:32,878 INFO L129 PetriNetUnfolder]: 2538/19054 cut-off events. [2022-07-12 10:21:32,878 INFO L130 PetriNetUnfolder]: For 6338/6965 co-relation queries the response was YES. [2022-07-12 10:21:33,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26089 conditions, 19054 events. 2538/19054 cut-off events. For 6338/6965 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 251184 event pairs, 1062 based on Foata normal form. 38/16847 useless extension candidates. Maximal degree in co-relation 26054. Up to 940 conditions per place. [2022-07-12 10:21:33,096 INFO L132 encePairwiseOnDemand]: 318/358 looper letters, 222 selfloop transitions, 58 changer transitions 8/515 dead transitions. [2022-07-12 10:21:33,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 515 transitions, 2254 flow [2022-07-12 10:21:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 10:21:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-12 10:21:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8416 transitions. [2022-07-12 10:21:33,114 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6914229378902399 [2022-07-12 10:21:33,115 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8416 transitions. [2022-07-12 10:21:33,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8416 transitions. [2022-07-12 10:21:33,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:33,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8416 transitions. [2022-07-12 10:21:33,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 247.52941176470588) internal successors, (8416), 34 states have internal predecessors, (8416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:33,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 358.0) internal successors, (12530), 35 states have internal predecessors, (12530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:33,161 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 358.0) internal successors, (12530), 35 states have internal predecessors, (12530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:33,161 INFO L186 Difference]: Start difference. First operand has 408 places, 359 transitions, 1095 flow. Second operand 34 states and 8416 transitions. [2022-07-12 10:21:33,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 515 transitions, 2254 flow [2022-07-12 10:21:33,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 515 transitions, 2118 flow, removed 36 selfloop flow, removed 32 redundant places. [2022-07-12 10:21:33,185 INFO L242 Difference]: Finished difference. Result has 414 places, 377 transitions, 1337 flow [2022-07-12 10:21:33,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1337, PETRI_PLACES=414, PETRI_TRANSITIONS=377} [2022-07-12 10:21:33,188 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 89 predicate places. [2022-07-12 10:21:33,193 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 377 transitions, 1337 flow [2022-07-12 10:21:33,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 242.95833333333334) internal successors, (5831), 24 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:33,196 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:33,196 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:33,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:21:33,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:21:33,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:33,197 INFO L85 PathProgramCache]: Analyzing trace with hash 608820589, now seen corresponding path program 4 times [2022-07-12 10:21:33,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:33,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540428094] [2022-07-12 10:21:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:33,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540428094] [2022-07-12 10:21:33,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540428094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:33,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:33,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-12 10:21:33,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287836641] [2022-07-12 10:21:33,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 10:21:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 10:21:33,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-07-12 10:21:33,871 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-12 10:21:33,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 377 transitions, 1337 flow. Second operand has 27 states, 27 states have (on average 244.59259259259258) internal successors, (6604), 27 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:33,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:33,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-12 10:21:33,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:38,078 INFO L129 PetriNetUnfolder]: 2335/18037 cut-off events. [2022-07-12 10:21:38,079 INFO L130 PetriNetUnfolder]: For 11305/12077 co-relation queries the response was YES. [2022-07-12 10:21:38,220 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25761 conditions, 18037 events. 2335/18037 cut-off events. For 11305/12077 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 237616 event pairs, 1216 based on Foata normal form. 49/16012 useless extension candidates. Maximal degree in co-relation 25721. Up to 778 conditions per place. [2022-07-12 10:21:38,283 INFO L132 encePairwiseOnDemand]: 321/358 looper letters, 250 selfloop transitions, 60 changer transitions 8/553 dead transitions. [2022-07-12 10:21:38,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 553 transitions, 2605 flow [2022-07-12 10:21:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 10:21:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-12 10:21:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 9737 transitions. [2022-07-12 10:21:38,295 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6973929236499069 [2022-07-12 10:21:38,296 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 9737 transitions. [2022-07-12 10:21:38,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 9737 transitions. [2022-07-12 10:21:38,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:38,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 9737 transitions. [2022-07-12 10:21:38,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 249.66666666666666) internal successors, (9737), 39 states have internal predecessors, (9737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:38,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 358.0) internal successors, (14320), 40 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:38,334 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 358.0) internal successors, (14320), 40 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:38,334 INFO L186 Difference]: Start difference. First operand has 414 places, 377 transitions, 1337 flow. Second operand 39 states and 9737 transitions. [2022-07-12 10:21:38,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 553 transitions, 2605 flow [2022-07-12 10:21:38,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 553 transitions, 2455 flow, removed 46 selfloop flow, removed 25 redundant places. [2022-07-12 10:21:38,365 INFO L242 Difference]: Finished difference. Result has 426 places, 381 transitions, 1439 flow [2022-07-12 10:21:38,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1439, PETRI_PLACES=426, PETRI_TRANSITIONS=381} [2022-07-12 10:21:38,366 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 101 predicate places. [2022-07-12 10:21:38,366 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 381 transitions, 1439 flow [2022-07-12 10:21:38,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 244.59259259259258) internal successors, (6604), 27 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:38,369 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:38,369 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:38,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:21:38,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:21:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:38,370 INFO L85 PathProgramCache]: Analyzing trace with hash 477865303, now seen corresponding path program 1 times [2022-07-12 10:21:38,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:38,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543770695] [2022-07-12 10:21:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:38,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:38,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543770695] [2022-07-12 10:21:38,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543770695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:38,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10714082] [2022-07-12 10:21:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:38,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:38,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:38,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:21:38,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:21:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:38,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:21:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:39,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:21:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:39,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10714082] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:39,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:21:39,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 26 [2022-07-12 10:21:39,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852665595] [2022-07-12 10:21:39,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:39,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:21:39,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:21:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-07-12 10:21:39,654 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 358 [2022-07-12 10:21:39,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 381 transitions, 1439 flow. Second operand has 13 states, 13 states have (on average 251.46153846153845) internal successors, (3269), 13 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:39,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:39,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 358 [2022-07-12 10:21:39,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:43,021 INFO L129 PetriNetUnfolder]: 2463/20707 cut-off events. [2022-07-12 10:21:43,021 INFO L130 PetriNetUnfolder]: For 11281/11815 co-relation queries the response was YES. [2022-07-12 10:21:43,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29091 conditions, 20707 events. 2463/20707 cut-off events. For 11281/11815 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 283339 event pairs, 1534 based on Foata normal form. 17/18444 useless extension candidates. Maximal degree in co-relation 29051. Up to 2277 conditions per place. [2022-07-12 10:21:43,441 INFO L132 encePairwiseOnDemand]: 336/358 looper letters, 193 selfloop transitions, 35 changer transitions 6/485 dead transitions. [2022-07-12 10:21:43,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 485 transitions, 2248 flow [2022-07-12 10:21:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:21:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:21:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4632 transitions. [2022-07-12 10:21:43,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7188081936685289 [2022-07-12 10:21:43,448 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4632 transitions. [2022-07-12 10:21:43,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4632 transitions. [2022-07-12 10:21:43,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:43,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4632 transitions. [2022-07-12 10:21:43,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 257.3333333333333) internal successors, (4632), 18 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:43,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 358.0) internal successors, (6802), 19 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:43,467 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 358.0) internal successors, (6802), 19 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:43,468 INFO L186 Difference]: Start difference. First operand has 426 places, 381 transitions, 1439 flow. Second operand 18 states and 4632 transitions. [2022-07-12 10:21:43,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 485 transitions, 2248 flow [2022-07-12 10:21:43,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 485 transitions, 2139 flow, removed 8 selfloop flow, removed 35 redundant places. [2022-07-12 10:21:43,504 INFO L242 Difference]: Finished difference. Result has 413 places, 396 transitions, 1522 flow [2022-07-12 10:21:43,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1522, PETRI_PLACES=413, PETRI_TRANSITIONS=396} [2022-07-12 10:21:43,507 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 88 predicate places. [2022-07-12 10:21:43,507 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 396 transitions, 1522 flow [2022-07-12 10:21:43,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 251.46153846153845) internal successors, (3269), 13 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:43,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:43,509 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:43,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:21:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 10:21:43,735 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:21:43,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1947793187, now seen corresponding path program 1 times [2022-07-12 10:21:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:43,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549378230] [2022-07-12 10:21:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:43,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:44,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:44,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549378230] [2022-07-12 10:21:44,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549378230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:44,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008272421] [2022-07-12 10:21:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:44,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:44,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:44,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:21:44,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:21:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:44,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:21:44,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:44,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:21:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:45,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008272421] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:45,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:21:45,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19, 18] total 36 [2022-07-12 10:21:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708100831] [2022-07-12 10:21:45,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:21:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:45,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:21:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 10:21:45,818 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-12 10:21:45,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 396 transitions, 1522 flow. Second operand has 18 states, 18 states have (on average 246.11111111111111) internal successors, (4430), 18 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:45,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:45,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-12 10:21:45,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:50,054 INFO L129 PetriNetUnfolder]: 2778/21706 cut-off events. [2022-07-12 10:21:50,054 INFO L130 PetriNetUnfolder]: For 15030/16056 co-relation queries the response was YES. [2022-07-12 10:21:50,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31287 conditions, 21706 events. 2778/21706 cut-off events. For 15030/16056 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 295935 event pairs, 1654 based on Foata normal form. 17/19214 useless extension candidates. Maximal degree in co-relation 31243. Up to 1162 conditions per place. [2022-07-12 10:21:50,348 INFO L132 encePairwiseOnDemand]: 328/358 looper letters, 237 selfloop transitions, 52 changer transitions 8/533 dead transitions. [2022-07-12 10:21:50,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 533 transitions, 2621 flow [2022-07-12 10:21:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 10:21:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 10:21:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7520 transitions. [2022-07-12 10:21:50,358 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7001862197392924 [2022-07-12 10:21:50,358 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7520 transitions. [2022-07-12 10:21:50,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7520 transitions. [2022-07-12 10:21:50,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:50,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7520 transitions. [2022-07-12 10:21:50,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 250.66666666666666) internal successors, (7520), 30 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:50,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 358.0) internal successors, (11098), 31 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:50,389 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 358.0) internal successors, (11098), 31 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:50,389 INFO L186 Difference]: Start difference. First operand has 413 places, 396 transitions, 1522 flow. Second operand 30 states and 7520 transitions. [2022-07-12 10:21:50,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 533 transitions, 2621 flow [2022-07-12 10:21:50,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 533 transitions, 2555 flow, removed 23 selfloop flow, removed 8 redundant places. [2022-07-12 10:21:50,430 INFO L242 Difference]: Finished difference. Result has 440 places, 406 transitions, 1715 flow [2022-07-12 10:21:50,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1715, PETRI_PLACES=440, PETRI_TRANSITIONS=406} [2022-07-12 10:21:50,432 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 115 predicate places. [2022-07-12 10:21:50,432 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 406 transitions, 1715 flow [2022-07-12 10:21:50,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 246.11111111111111) internal successors, (4430), 18 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:50,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:50,434 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:50,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:21:50,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-12 10:21:50,660 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:21:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1532582343, now seen corresponding path program 2 times [2022-07-12 10:21:50,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:50,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267541599] [2022-07-12 10:21:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:50,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267541599] [2022-07-12 10:21:50,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267541599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:50,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246814976] [2022-07-12 10:21:50,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:21:50,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:50,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:50,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:21:50,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:21:51,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:21:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:21:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:21:51,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:21:51,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:21:51,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246814976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:51,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:21:51,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 25 [2022-07-12 10:21:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446684384] [2022-07-12 10:21:51,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:51,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:21:51,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:21:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-07-12 10:21:51,298 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 358 [2022-07-12 10:21:51,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 406 transitions, 1715 flow. Second operand has 10 states, 10 states have (on average 272.6) internal successors, (2726), 10 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:51,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:51,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 358 [2022-07-12 10:21:51,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:56,571 INFO L129 PetriNetUnfolder]: 4588/33990 cut-off events. [2022-07-12 10:21:56,571 INFO L130 PetriNetUnfolder]: For 34351/36547 co-relation queries the response was YES. [2022-07-12 10:21:57,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51207 conditions, 33990 events. 4588/33990 cut-off events. For 34351/36547 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 501207 event pairs, 1070 based on Foata normal form. 118/29850 useless extension candidates. Maximal degree in co-relation 51158. Up to 2646 conditions per place. [2022-07-12 10:21:57,214 INFO L132 encePairwiseOnDemand]: 345/358 looper letters, 155 selfloop transitions, 42 changer transitions 8/493 dead transitions. [2022-07-12 10:21:57,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 493 transitions, 2717 flow [2022-07-12 10:21:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:21:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:21:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3062 transitions. [2022-07-12 10:21:57,218 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7775520568816658 [2022-07-12 10:21:57,218 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3062 transitions. [2022-07-12 10:21:57,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3062 transitions. [2022-07-12 10:21:57,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:57,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3062 transitions. [2022-07-12 10:21:57,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 278.3636363636364) internal successors, (3062), 11 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:57,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:57,227 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:57,228 INFO L186 Difference]: Start difference. First operand has 440 places, 406 transitions, 1715 flow. Second operand 11 states and 3062 transitions. [2022-07-12 10:21:57,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 493 transitions, 2717 flow [2022-07-12 10:21:57,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 493 transitions, 2604 flow, removed 40 selfloop flow, removed 15 redundant places. [2022-07-12 10:21:57,312 INFO L242 Difference]: Finished difference. Result has 442 places, 430 transitions, 2090 flow [2022-07-12 10:21:57,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2090, PETRI_PLACES=442, PETRI_TRANSITIONS=430} [2022-07-12 10:21:57,313 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 117 predicate places. [2022-07-12 10:21:57,314 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 430 transitions, 2090 flow [2022-07-12 10:21:57,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 272.6) internal successors, (2726), 10 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:57,314 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:57,315 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:57,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:21:57,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:57,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:21:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1171108207, now seen corresponding path program 3 times [2022-07-12 10:21:57,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:57,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479418290] [2022-07-12 10:21:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:57,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:57,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:57,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479418290] [2022-07-12 10:21:57,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479418290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:57,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151037305] [2022-07-12 10:21:57,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:21:57,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:57,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:57,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:21:57,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:21:57,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-12 10:21:57,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:21:57,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:21:57,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:21:58,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:21:58,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151037305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:58,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:21:58,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 25 [2022-07-12 10:21:58,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920793423] [2022-07-12 10:21:58,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:58,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:21:58,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:58,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:21:58,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-07-12 10:21:58,151 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 358 [2022-07-12 10:21:58,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 430 transitions, 2090 flow. Second operand has 10 states, 10 states have (on average 272.6) internal successors, (2726), 10 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:21:58,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:58,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 358 [2022-07-12 10:21:58,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:22:04,169 INFO L129 PetriNetUnfolder]: 4914/36468 cut-off events. [2022-07-12 10:22:04,169 INFO L130 PetriNetUnfolder]: For 53839/57184 co-relation queries the response was YES. [2022-07-12 10:22:04,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58571 conditions, 36468 events. 4914/36468 cut-off events. For 53839/57184 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 543135 event pairs, 1113 based on Foata normal form. 171/31940 useless extension candidates. Maximal degree in co-relation 58514. Up to 3204 conditions per place. [2022-07-12 10:22:04,840 INFO L132 encePairwiseOnDemand]: 345/358 looper letters, 166 selfloop transitions, 51 changer transitions 8/513 dead transitions. [2022-07-12 10:22:04,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 513 transitions, 3164 flow [2022-07-12 10:22:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:22:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:22:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3061 transitions. [2022-07-12 10:22:04,845 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7772981208735399 [2022-07-12 10:22:04,845 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3061 transitions. [2022-07-12 10:22:04,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3061 transitions. [2022-07-12 10:22:04,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:22:04,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3061 transitions. [2022-07-12 10:22:04,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 278.27272727272725) internal successors, (3061), 11 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:04,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:04,855 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:04,855 INFO L186 Difference]: Start difference. First operand has 442 places, 430 transitions, 2090 flow. Second operand 11 states and 3061 transitions. [2022-07-12 10:22:04,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 513 transitions, 3164 flow [2022-07-12 10:22:04,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 513 transitions, 3049 flow, removed 41 selfloop flow, removed 7 redundant places. [2022-07-12 10:22:05,004 INFO L242 Difference]: Finished difference. Result has 448 places, 456 transitions, 2554 flow [2022-07-12 10:22:05,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2554, PETRI_PLACES=448, PETRI_TRANSITIONS=456} [2022-07-12 10:22:05,006 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 123 predicate places. [2022-07-12 10:22:05,006 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 456 transitions, 2554 flow [2022-07-12 10:22:05,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 272.6) internal successors, (2726), 10 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:05,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:22:05,006 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:22:05,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 10:22:05,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:22:05,207 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:22:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:22:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash -670238449, now seen corresponding path program 4 times [2022-07-12 10:22:05,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:22:05,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286725566] [2022-07-12 10:22:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:22:05,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:22:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:22:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:22:05,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:22:05,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286725566] [2022-07-12 10:22:05,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286725566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:22:05,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225363445] [2022-07-12 10:22:05,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:22:05,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:22:05,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:22:05,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:22:05,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:22:05,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:22:05,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:22:05,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:22:05,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:22:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:22:06,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:22:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:22:07,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225363445] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:22:07,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:22:07,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19, 18] total 36 [2022-07-12 10:22:07,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356384620] [2022-07-12 10:22:07,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:22:07,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:22:07,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:22:07,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:22:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 10:22:07,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 358 [2022-07-12 10:22:07,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 456 transitions, 2554 flow. Second operand has 18 states, 18 states have (on average 246.11111111111111) internal successors, (4430), 18 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:07,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:22:07,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 358 [2022-07-12 10:22:07,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:22:14,317 INFO L129 PetriNetUnfolder]: 4742/37746 cut-off events. [2022-07-12 10:22:14,317 INFO L130 PetriNetUnfolder]: For 66491/69757 co-relation queries the response was YES. [2022-07-12 10:22:14,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60345 conditions, 37746 events. 4742/37746 cut-off events. For 66491/69757 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 564933 event pairs, 2511 based on Foata normal form. 114/33311 useless extension candidates. Maximal degree in co-relation 60285. Up to 2073 conditions per place. [2022-07-12 10:22:15,049 INFO L132 encePairwiseOnDemand]: 328/358 looper letters, 275 selfloop transitions, 67 changer transitions 8/603 dead transitions. [2022-07-12 10:22:15,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 603 transitions, 4125 flow [2022-07-12 10:22:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 10:22:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 10:22:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7521 transitions. [2022-07-12 10:22:15,061 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7002793296089386 [2022-07-12 10:22:15,062 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7521 transitions. [2022-07-12 10:22:15,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7521 transitions. [2022-07-12 10:22:15,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:22:15,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7521 transitions. [2022-07-12 10:22:15,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 250.7) internal successors, (7521), 30 states have internal predecessors, (7521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:15,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 358.0) internal successors, (11098), 31 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:15,096 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 358.0) internal successors, (11098), 31 states have internal predecessors, (11098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:15,097 INFO L186 Difference]: Start difference. First operand has 448 places, 456 transitions, 2554 flow. Second operand 30 states and 7521 transitions. [2022-07-12 10:22:15,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 603 transitions, 4125 flow [2022-07-12 10:22:15,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 603 transitions, 3953 flow, removed 86 selfloop flow, removed 6 redundant places. [2022-07-12 10:22:15,326 INFO L242 Difference]: Finished difference. Result has 470 places, 467 transitions, 2840 flow [2022-07-12 10:22:15,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2840, PETRI_PLACES=470, PETRI_TRANSITIONS=467} [2022-07-12 10:22:15,328 INFO L279 CegarLoopForPetriNet]: 325 programPoint places, 145 predicate places. [2022-07-12 10:22:15,329 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 467 transitions, 2840 flow [2022-07-12 10:22:15,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 246.11111111111111) internal successors, (4430), 18 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:15,330 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:22:15,330 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:22:15,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:22:15,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 10:22:15,544 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:22:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:22:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash -546337380, now seen corresponding path program 1 times [2022-07-12 10:22:15,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:22:15,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55180346] [2022-07-12 10:22:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:22:15,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:22:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:22:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:22:15,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:22:15,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55180346] [2022-07-12 10:22:15,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55180346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:22:15,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043853509] [2022-07-12 10:22:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:22:15,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:22:15,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:22:15,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:22:15,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:22:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:22:15,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:22:15,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:22:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:22:16,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:22:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:22:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043853509] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:22:16,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:22:16,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 26 [2022-07-12 10:22:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993148327] [2022-07-12 10:22:16,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:22:16,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:22:16,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:22:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:22:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-07-12 10:22:16,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 358 [2022-07-12 10:22:16,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 467 transitions, 2840 flow. Second operand has 13 states, 13 states have (on average 251.46153846153845) internal successors, (3269), 13 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:22:16,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:22:16,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 358 [2022-07-12 10:22:16,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand