./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-comm.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/mult-comm.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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:26:04,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:26:04,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:26:04,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:26:04,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:26:04,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:26:04,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:26:04,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:26:04,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:26:04,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:26:04,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:26:04,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:26:04,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:26:04,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:26:04,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:26:04,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:26:04,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:26:04,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:26:04,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:26:04,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:26:04,712 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:26:04,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:26:04,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:26:04,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:26:04,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:26:04,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:26:04,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:26:04,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:26:04,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:26:04,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:26:04,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:26:04,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:26:04,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:26:04,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:26:04,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:26:04,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:26:04,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:26:04,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:26:04,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:26:04,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:26:04,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:26:04,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:26:04,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:26:04,750 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:26:04,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:26:04,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:26:04,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:26:04,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:26:04,754 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:26:04,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:26:04,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:26:04,754 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:26:04,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:26:04,755 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:26:04,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:26:04,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:26:04,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:26:04,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:26:04,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:26:04,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:26:04,756 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:26:04,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:26:04,757 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:26:04,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:26:04,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:26:04,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:26:04,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:26:04,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:26:04,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:26:04,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:26:04,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:26:04,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:26:04,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:26:04,759 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:26:04,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:26:04,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:26:04,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2022-07-12 10:26:04,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:26:04,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:26:04,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:26:04,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:26:04,945 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:26:04,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-07-12 10:26:05,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c10933f5/d15dc733caf94a289a5702e1983aed1d/FLAGb88288777 [2022-07-12 10:26:05,306 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:26:05,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-07-12 10:26:05,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c10933f5/d15dc733caf94a289a5702e1983aed1d/FLAGb88288777 [2022-07-12 10:26:05,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c10933f5/d15dc733caf94a289a5702e1983aed1d [2022-07-12 10:26:05,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:26:05,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:26:05,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:26:05,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:26:05,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:26:05,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2347c2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05, skipping insertion in model container [2022-07-12 10:26:05,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:26:05,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:26:05,897 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/mult-comm.wvr.c[1910,1923] [2022-07-12 10:26:05,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:26:05,905 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:26:05,925 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/mult-comm.wvr.c[1910,1923] [2022-07-12 10:26:05,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:26:05,935 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:26:05,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05 WrapperNode [2022-07-12 10:26:05,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:26:05,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:26:05,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:26:05,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:26:05,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,969 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-07-12 10:26:05,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:26:05,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:26:05,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:26:05,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:26:05,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:05,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:26:05,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:26:05,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:26:05,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:26:05,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (1/1) ... [2022-07-12 10:26:06,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:26:06,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:06,017 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 10:26:06,022 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 10:26:06,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:26:06,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:26:06,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:26:06,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:26:06,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:26:06,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:26:06,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:26:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:26:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:26:06,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:26:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:26:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:26:06,050 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 10:26:06,099 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:26:06,100 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:26:06,197 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:26:06,202 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:26:06,202 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:26:06,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:26:06 BoogieIcfgContainer [2022-07-12 10:26:06,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:26:06,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:26:06,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:26:06,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:26:06,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:26:05" (1/3) ... [2022-07-12 10:26:06,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6114872c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:26:06, skipping insertion in model container [2022-07-12 10:26:06,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:05" (2/3) ... [2022-07-12 10:26:06,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6114872c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:26:06, skipping insertion in model container [2022-07-12 10:26:06,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:26:06" (3/3) ... [2022-07-12 10:26:06,228 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-07-12 10:26:06,234 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:26:06,239 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:26:06,240 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:26:06,240 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:26:06,295 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:26:06,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2022-07-12 10:26:06,356 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2022-07-12 10:26:06,356 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:26:06,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-07-12 10:26:06,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2022-07-12 10:26:06,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2022-07-12 10:26:06,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:26:06,372 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@3d573e74, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e56c307 [2022-07-12 10:26:06,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:26:06,386 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-12 10:26:06,386 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:26:06,386 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:06,387 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] [2022-07-12 10:26:06,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1905633102, now seen corresponding path program 1 times [2022-07-12 10:26:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:06,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678276649] [2022-07-12 10:26:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:06,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:06,536 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 10:26:06,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678276649] [2022-07-12 10:26:06,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678276649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:26:06,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:26:06,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:26:06,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78149005] [2022-07-12 10:26:06,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:06,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:26:06,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:26:06,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:26:06,576 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2022-07-12 10:26:06,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 10:26:06,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:06,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2022-07-12 10:26:06,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:06,622 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2022-07-12 10:26:06,622 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:26:06,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2022-07-12 10:26:06,623 INFO L132 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2022-07-12 10:26:06,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2022-07-12 10:26:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:26:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:26:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2022-07-12 10:26:06,633 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.94375 [2022-07-12 10:26:06,634 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2022-07-12 10:26:06,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2022-07-12 10:26:06,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:06,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2022-07-12 10:26:06,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 10:26:06,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 10:26:06,641 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 10:26:06,643 INFO L186 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2022-07-12 10:26:06,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2022-07-12 10:26:06,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:26:06,647 INFO L242 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2022-07-12 10:26:06,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2022-07-12 10:26:06,651 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-07-12 10:26:06,651 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2022-07-12 10:26:06,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 10:26:06,652 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:06,652 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] [2022-07-12 10:26:06,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:26:06,652 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2022-07-12 10:26:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:06,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714936237] [2022-07-12 10:26:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:06,855 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 10:26:06,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:06,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714936237] [2022-07-12 10:26:06,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714936237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:26:06,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:26:06,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:26:06,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837010992] [2022-07-12 10:26:06,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:06,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:26:06,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:26:06,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:26:06,859 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2022-07-12 10:26:06,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 10:26:06,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:06,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2022-07-12 10:26:06,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:06,943 INFO L129 PetriNetUnfolder]: 12/131 cut-off events. [2022-07-12 10:26:06,944 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:26:06,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 131 events. 12/131 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 309 event pairs, 1 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 171. Up to 19 conditions per place. [2022-07-12 10:26:06,945 INFO L132 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-07-12 10:26:06,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2022-07-12 10:26:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:26:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:26:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2022-07-12 10:26:06,948 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2022-07-12 10:26:06,948 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2022-07-12 10:26:06,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2022-07-12 10:26:06,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:06,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2022-07-12 10:26:06,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 10:26:06,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 10:26:06,953 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 10:26:06,953 INFO L186 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2022-07-12 10:26:06,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2022-07-12 10:26:06,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:26:06,956 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2022-07-12 10:26:06,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-07-12 10:26:06,957 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-07-12 10:26:06,957 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2022-07-12 10:26:06,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 10:26:06,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:06,957 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:06,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:26:06,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash -919337767, now seen corresponding path program 1 times [2022-07-12 10:26:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:06,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742974662] [2022-07-12 10:26:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:06,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:07,256 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 10:26:07,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:07,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742974662] [2022-07-12 10:26:07,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742974662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692862116] [2022-07-12 10:26:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:07,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:07,260 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 10:26:07,262 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 10:26:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:07,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 10:26:07,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:07,642 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 10:26:07,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:07,884 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 10:26:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692862116] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:07,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:26:07,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 17 [2022-07-12 10:26:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554995095] [2022-07-12 10:26:07,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:26:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:26:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:26:07,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-12 10:26:07,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states 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 10:26:07,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:07,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-12 10:26:07,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:08,041 INFO L129 PetriNetUnfolder]: 121/397 cut-off events. [2022-07-12 10:26:08,041 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-12 10:26:08,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 397 events. 121/397 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1906 event pairs, 19 based on Foata normal form. 1/342 useless extension candidates. Maximal degree in co-relation 739. Up to 64 conditions per place. [2022-07-12 10:26:08,045 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 63 selfloop transitions, 16 changer transitions 7/127 dead transitions. [2022-07-12 10:26:08,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 127 transitions, 492 flow [2022-07-12 10:26:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:26:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:26:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 597 transitions. [2022-07-12 10:26:08,047 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.74625 [2022-07-12 10:26:08,047 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 597 transitions. [2022-07-12 10:26:08,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 597 transitions. [2022-07-12 10:26:08,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:08,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 597 transitions. [2022-07-12 10:26:08,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.7) internal successors, (597), 10 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 10:26:08,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 10:26:08,052 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 10:26:08,052 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 10 states and 597 transitions. [2022-07-12 10:26:08,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 127 transitions, 492 flow [2022-07-12 10:26:08,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 478 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-07-12 10:26:08,056 INFO L242 Difference]: Finished difference. Result has 85 places, 79 transitions, 256 flow [2022-07-12 10:26:08,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=256, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2022-07-12 10:26:08,056 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2022-07-12 10:26:08,057 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 256 flow [2022-07-12 10:26:08,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states 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 10:26:08,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:08,057 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:08,075 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 10:26:08,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:08,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:08,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1709159913, now seen corresponding path program 1 times [2022-07-12 10:26:08,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:08,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647784439] [2022-07-12 10:26:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:08,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:08,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:08,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647784439] [2022-07-12 10:26:08,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647784439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:08,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392781166] [2022-07-12 10:26:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:08,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:08,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:08,421 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 10:26:08,423 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 10:26:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:08,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:26:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:08,614 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 10:26:08,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:09,272 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 10:26:09,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392781166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:09,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:09,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2022-07-12 10:26:09,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981327291] [2022-07-12 10:26:09,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:09,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:26:09,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:09,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:26:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:26:09,275 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-12 10:26:09,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:26:09,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:09,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-12 10:26:09,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:09,741 INFO L129 PetriNetUnfolder]: 44/267 cut-off events. [2022-07-12 10:26:09,741 INFO L130 PetriNetUnfolder]: For 146/166 co-relation queries the response was YES. [2022-07-12 10:26:09,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 267 events. 44/267 cut-off events. For 146/166 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1173 event pairs, 10 based on Foata normal form. 8/257 useless extension candidates. Maximal degree in co-relation 553. Up to 76 conditions per place. [2022-07-12 10:26:09,743 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 30 selfloop transitions, 10 changer transitions 11/103 dead transitions. [2022-07-12 10:26:09,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 103 transitions, 443 flow [2022-07-12 10:26:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:26:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:26:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2022-07-12 10:26:09,745 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.76 [2022-07-12 10:26:09,745 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2022-07-12 10:26:09,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2022-07-12 10:26:09,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:09,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2022-07-12 10:26:09,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 10:26:09,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 10:26:09,748 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 10:26:09,748 INFO L186 Difference]: Start difference. First operand has 85 places, 79 transitions, 256 flow. Second operand 10 states and 608 transitions. [2022-07-12 10:26:09,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 103 transitions, 443 flow [2022-07-12 10:26:09,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 411 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-07-12 10:26:09,752 INFO L242 Difference]: Finished difference. Result has 93 places, 81 transitions, 281 flow [2022-07-12 10:26:09,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=281, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2022-07-12 10:26:09,752 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 22 predicate places. [2022-07-12 10:26:09,753 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 281 flow [2022-07-12 10:26:09,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:26:09,753 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:09,753 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:09,775 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 10:26:09,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 10:26:09,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash -446523295, now seen corresponding path program 2 times [2022-07-12 10:26:09,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:09,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327779064] [2022-07-12 10:26:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:09,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:10,104 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 10:26:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327779064] [2022-07-12 10:26:10,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327779064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462200710] [2022-07-12 10:26:10,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:26:10,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:10,107 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 10:26:10,109 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 10:26:10,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:26:10,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:10,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 10:26:10,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:10,318 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 10:26:10,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:10,511 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 10:26:10,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462200710] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:10,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:10,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 16 [2022-07-12 10:26:10,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314226937] [2022-07-12 10:26:10,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:10,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:26:10,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:10,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:26:10,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:26:10,514 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-12 10:26:10,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 281 flow. Second operand has 16 states, 16 states have (on average 53.875) internal successors, (862), 16 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 10:26:10,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:10,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-12 10:26:10,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:10,871 INFO L129 PetriNetUnfolder]: 154/573 cut-off events. [2022-07-12 10:26:10,871 INFO L130 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2022-07-12 10:26:10,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 573 events. 154/573 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3230 event pairs, 45 based on Foata normal form. 3/572 useless extension candidates. Maximal degree in co-relation 1347. Up to 160 conditions per place. [2022-07-12 10:26:10,874 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 78 selfloop transitions, 30 changer transitions 18/167 dead transitions. [2022-07-12 10:26:10,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 167 transitions, 875 flow [2022-07-12 10:26:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:26:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:26:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1089 transitions. [2022-07-12 10:26:10,876 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164473684210526 [2022-07-12 10:26:10,877 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1089 transitions. [2022-07-12 10:26:10,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1089 transitions. [2022-07-12 10:26:10,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:10,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1089 transitions. [2022-07-12 10:26:10,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.31578947368421) internal successors, (1089), 19 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states 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 10:26:10,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 10:26:10,881 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 10:26:10,881 INFO L186 Difference]: Start difference. First operand has 93 places, 81 transitions, 281 flow. Second operand 19 states and 1089 transitions. [2022-07-12 10:26:10,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 167 transitions, 875 flow [2022-07-12 10:26:10,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 812 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-07-12 10:26:10,885 INFO L242 Difference]: Finished difference. Result has 113 places, 97 transitions, 492 flow [2022-07-12 10:26:10,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=492, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2022-07-12 10:26:10,886 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 42 predicate places. [2022-07-12 10:26:10,886 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 492 flow [2022-07-12 10:26:10,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.875) internal successors, (862), 16 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 10:26:10,887 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:10,887 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:10,906 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 10:26:11,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:11,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash -652524683, now seen corresponding path program 3 times [2022-07-12 10:26:11,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:11,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120013795] [2022-07-12 10:26:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:11,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:11,208 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 10:26:11,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:11,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120013795] [2022-07-12 10:26:11,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120013795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:11,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112723288] [2022-07-12 10:26:11,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:26:11,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:11,211 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 10:26:11,212 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 10:26:11,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:26:11,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 10:26:11,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:11,385 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 10:26:11,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:11,568 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 10:26:11,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112723288] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:11,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:26:11,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 15 [2022-07-12 10:26:11,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906583824] [2022-07-12 10:26:11,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:11,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:26:11,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:26:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:26:11,569 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-12 10:26:11,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states 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 10:26:11,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:11,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-12 10:26:11,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:11,852 INFO L129 PetriNetUnfolder]: 154/587 cut-off events. [2022-07-12 10:26:11,853 INFO L130 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2022-07-12 10:26:11,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1646 conditions, 587 events. 154/587 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3314 event pairs, 60 based on Foata normal form. 3/581 useless extension candidates. Maximal degree in co-relation 1623. Up to 267 conditions per place. [2022-07-12 10:26:11,857 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 58 selfloop transitions, 12 changer transitions 15/126 dead transitions. [2022-07-12 10:26:11,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 819 flow [2022-07-12 10:26:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:26:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:26:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2022-07-12 10:26:11,859 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2022-07-12 10:26:11,859 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2022-07-12 10:26:11,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2022-07-12 10:26:11,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:11,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2022-07-12 10:26:11,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 10:26:11,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 10:26:11,861 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 10:26:11,861 INFO L186 Difference]: Start difference. First operand has 113 places, 97 transitions, 492 flow. Second operand 9 states and 520 transitions. [2022-07-12 10:26:11,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 819 flow [2022-07-12 10:26:11,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 126 transitions, 706 flow, removed 35 selfloop flow, removed 12 redundant places. [2022-07-12 10:26:11,867 INFO L242 Difference]: Finished difference. Result has 107 places, 97 transitions, 445 flow [2022-07-12 10:26:11,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=445, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2022-07-12 10:26:11,868 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2022-07-12 10:26:11,868 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 445 flow [2022-07-12 10:26:11,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states 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 10:26:11,869 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:11,869 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:11,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:26:12,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:12,086 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:12,086 INFO L85 PathProgramCache]: Analyzing trace with hash -662099525, now seen corresponding path program 2 times [2022-07-12 10:26:12,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:12,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52891222] [2022-07-12 10:26:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:12,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:12,215 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 10:26:12,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:12,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52891222] [2022-07-12 10:26:12,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52891222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:12,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969394205] [2022-07-12 10:26:12,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:26:12,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:12,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:12,217 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 10:26:12,219 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 10:26:12,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:26:12,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:12,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:26:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:12,392 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 10:26:12,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:13,905 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 10:26:13,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969394205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:13,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:13,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-07-12 10:26:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946692355] [2022-07-12 10:26:13,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:13,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:26:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:26:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:26:13,907 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-12 10:26:13,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 445 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states 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 10:26:13,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:13,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-12 10:26:13,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:14,239 INFO L129 PetriNetUnfolder]: 77/445 cut-off events. [2022-07-12 10:26:14,240 INFO L130 PetriNetUnfolder]: For 583/620 co-relation queries the response was YES. [2022-07-12 10:26:14,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 445 events. 77/445 cut-off events. For 583/620 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2365 event pairs, 7 based on Foata normal form. 16/452 useless extension candidates. Maximal degree in co-relation 1076. Up to 134 conditions per place. [2022-07-12 10:26:14,242 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 44 selfloop transitions, 38 changer transitions 12/150 dead transitions. [2022-07-12 10:26:14,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 150 transitions, 899 flow [2022-07-12 10:26:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 10:26:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-12 10:26:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2022-07-12 10:26:14,244 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7544117647058823 [2022-07-12 10:26:14,244 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2022-07-12 10:26:14,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2022-07-12 10:26:14,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:14,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2022-07-12 10:26:14,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 10:26:14,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 10:26:14,248 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 10:26:14,248 INFO L186 Difference]: Start difference. First operand has 107 places, 97 transitions, 445 flow. Second operand 17 states and 1026 transitions. [2022-07-12 10:26:14,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 150 transitions, 899 flow [2022-07-12 10:26:14,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 841 flow, removed 16 selfloop flow, removed 7 redundant places. [2022-07-12 10:26:14,251 INFO L242 Difference]: Finished difference. Result has 127 places, 117 transitions, 717 flow [2022-07-12 10:26:14,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=717, PETRI_PLACES=127, PETRI_TRANSITIONS=117} [2022-07-12 10:26:14,252 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 56 predicate places. [2022-07-12 10:26:14,252 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 117 transitions, 717 flow [2022-07-12 10:26:14,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states 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 10:26:14,252 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:14,252 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:14,271 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 10:26:14,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:14,453 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:14,453 INFO L85 PathProgramCache]: Analyzing trace with hash 119757859, now seen corresponding path program 3 times [2022-07-12 10:26:14,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:14,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603918345] [2022-07-12 10:26:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:14,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:14,581 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 10:26:14,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:14,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603918345] [2022-07-12 10:26:14,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603918345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730415941] [2022-07-12 10:26:14,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:26:14,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:14,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:14,587 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 10:26:14,587 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 10:26:14,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:26:14,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:26:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:14,754 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 10:26:14,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:14,955 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 10:26:14,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730415941] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:14,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:26:14,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 15 [2022-07-12 10:26:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566365634] [2022-07-12 10:26:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:26:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:26:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:26:14,957 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-12 10:26:14,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 117 transitions, 717 flow. Second operand has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:26:14,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:14,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-12 10:26:14,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:15,080 INFO L129 PetriNetUnfolder]: 84/467 cut-off events. [2022-07-12 10:26:15,081 INFO L130 PetriNetUnfolder]: For 1071/1135 co-relation queries the response was YES. [2022-07-12 10:26:15,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 467 events. 84/467 cut-off events. For 1071/1135 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2620 event pairs, 11 based on Foata normal form. 24/483 useless extension candidates. Maximal degree in co-relation 1342. Up to 132 conditions per place. [2022-07-12 10:26:15,084 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 41 selfloop transitions, 42 changer transitions 4/143 dead transitions. [2022-07-12 10:26:15,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 143 transitions, 1076 flow [2022-07-12 10:26:15,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:26:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:26:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2022-07-12 10:26:15,085 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.76 [2022-07-12 10:26:15,085 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2022-07-12 10:26:15,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2022-07-12 10:26:15,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:15,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2022-07-12 10:26:15,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 10:26:15,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 10:26:15,088 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 10:26:15,089 INFO L186 Difference]: Start difference. First operand has 127 places, 117 transitions, 717 flow. Second operand 10 states and 608 transitions. [2022-07-12 10:26:15,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 143 transitions, 1076 flow [2022-07-12 10:26:15,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 143 transitions, 1033 flow, removed 17 selfloop flow, removed 8 redundant places. [2022-07-12 10:26:15,095 INFO L242 Difference]: Finished difference. Result has 127 places, 128 transitions, 915 flow [2022-07-12 10:26:15,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=915, PETRI_PLACES=127, PETRI_TRANSITIONS=128} [2022-07-12 10:26:15,095 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 56 predicate places. [2022-07-12 10:26:15,095 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 128 transitions, 915 flow [2022-07-12 10:26:15,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:26:15,096 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:15,096 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:15,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:26:15,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:15,313 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash 168630357, now seen corresponding path program 4 times [2022-07-12 10:26:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:15,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451868543] [2022-07-12 10:26:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:15,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:15,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:15,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451868543] [2022-07-12 10:26:15,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451868543] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:15,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338566493] [2022-07-12 10:26:15,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:26:15,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:15,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:15,430 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:26:15,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:26:15,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:26:15,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:15,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:26:15,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:15,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:15,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338566493] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:15,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:15,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-07-12 10:26:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402548640] [2022-07-12 10:26:15,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:15,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:26:15,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:26:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:26:15,966 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-12 10:26:15,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 128 transitions, 915 flow. Second operand has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 10:26:15,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:15,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-12 10:26:15,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:16,577 INFO L129 PetriNetUnfolder]: 278/1002 cut-off events. [2022-07-12 10:26:16,577 INFO L130 PetriNetUnfolder]: For 2840/2840 co-relation queries the response was YES. [2022-07-12 10:26:16,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 1002 events. 278/1002 cut-off events. For 2840/2840 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6937 event pairs, 63 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 3232. Up to 166 conditions per place. [2022-07-12 10:26:16,584 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 108 selfloop transitions, 69 changer transitions 40/258 dead transitions. [2022-07-12 10:26:16,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 258 transitions, 2191 flow [2022-07-12 10:26:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:26:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:26:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1547 transitions. [2022-07-12 10:26:16,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7162037037037037 [2022-07-12 10:26:16,586 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1547 transitions. [2022-07-12 10:26:16,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1547 transitions. [2022-07-12 10:26:16,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:16,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1547 transitions. [2022-07-12 10:26:16,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.2962962962963) internal successors, (1547), 27 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 10:26:16,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 80.0) internal successors, (2240), 28 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states 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 10:26:16,593 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 80.0) internal successors, (2240), 28 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states 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 10:26:16,593 INFO L186 Difference]: Start difference. First operand has 127 places, 128 transitions, 915 flow. Second operand 27 states and 1547 transitions. [2022-07-12 10:26:16,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 258 transitions, 2191 flow [2022-07-12 10:26:16,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 258 transitions, 2054 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-07-12 10:26:16,604 INFO L242 Difference]: Finished difference. Result has 156 places, 143 transitions, 1213 flow [2022-07-12 10:26:16,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1213, PETRI_PLACES=156, PETRI_TRANSITIONS=143} [2022-07-12 10:26:16,605 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 85 predicate places. [2022-07-12 10:26:16,605 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 143 transitions, 1213 flow [2022-07-12 10:26:16,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 10:26:16,606 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:16,606 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:16,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:26:16,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:16,810 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:16,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:16,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1423120419, now seen corresponding path program 5 times [2022-07-12 10:26:16,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:16,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778850507] [2022-07-12 10:26:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:16,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:16,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:16,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778850507] [2022-07-12 10:26:16,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778850507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:16,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963113324] [2022-07-12 10:26:16,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:26:16,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:16,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:17,000 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:26:17,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:26:17,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:26:17,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:26:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:17,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:17,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963113324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:17,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:17,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-07-12 10:26:17,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607911895] [2022-07-12 10:26:17,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:17,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:26:17,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:26:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:26:17,585 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-12 10:26:17,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 143 transitions, 1213 flow. Second operand has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 10:26:17,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:17,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-12 10:26:17,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:18,899 INFO L129 PetriNetUnfolder]: 278/981 cut-off events. [2022-07-12 10:26:18,899 INFO L130 PetriNetUnfolder]: For 3817/3817 co-relation queries the response was YES. [2022-07-12 10:26:18,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3486 conditions, 981 events. 278/981 cut-off events. For 3817/3817 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6716 event pairs, 57 based on Foata normal form. 2/975 useless extension candidates. Maximal degree in co-relation 3449. Up to 166 conditions per place. [2022-07-12 10:26:18,904 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 113 selfloop transitions, 71 changer transitions 21/246 dead transitions. [2022-07-12 10:26:18,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 246 transitions, 2277 flow [2022-07-12 10:26:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 10:26:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-12 10:26:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1377 transitions. [2022-07-12 10:26:18,911 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7171875 [2022-07-12 10:26:18,911 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1377 transitions. [2022-07-12 10:26:18,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1377 transitions. [2022-07-12 10:26:18,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:18,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1377 transitions. [2022-07-12 10:26:18,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.375) internal successors, (1377), 24 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 10:26:18,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 80.0) internal successors, (2000), 25 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 10:26:18,917 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 80.0) internal successors, (2000), 25 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 10:26:18,917 INFO L186 Difference]: Start difference. First operand has 156 places, 143 transitions, 1213 flow. Second operand 24 states and 1377 transitions. [2022-07-12 10:26:18,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 246 transitions, 2277 flow [2022-07-12 10:26:18,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 246 transitions, 2089 flow, removed 48 selfloop flow, removed 20 redundant places. [2022-07-12 10:26:18,931 INFO L242 Difference]: Finished difference. Result has 159 places, 149 transitions, 1372 flow [2022-07-12 10:26:18,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1372, PETRI_PLACES=159, PETRI_TRANSITIONS=149} [2022-07-12 10:26:18,933 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 88 predicate places. [2022-07-12 10:26:18,933 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 149 transitions, 1372 flow [2022-07-12 10:26:18,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 10:26:18,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:18,934 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:18,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:26:19,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 10:26:19,138 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash -824553335, now seen corresponding path program 1 times [2022-07-12 10:26:19,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815310225] [2022-07-12 10:26:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:19,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:19,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815310225] [2022-07-12 10:26:19,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815310225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:19,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701573883] [2022-07-12 10:26:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:19,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:19,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:19,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:26:19,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:26:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:19,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 10:26:19,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:20,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:14,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701573883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:14,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:14,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 37 [2022-07-12 10:27:14,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274294908] [2022-07-12 10:27:14,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:14,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:27:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:14,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:27:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 10:27:14,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-07-12 10:27:14,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 149 transitions, 1372 flow. Second operand has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states 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 10:27:14,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:14,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-07-12 10:27:14,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:23,471 WARN L233 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 105 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:27:29,128 INFO L129 PetriNetUnfolder]: 366/1233 cut-off events. [2022-07-12 10:27:29,128 INFO L130 PetriNetUnfolder]: For 5197/5197 co-relation queries the response was YES. [2022-07-12 10:27:29,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 1233 events. 366/1233 cut-off events. For 5197/5197 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9004 event pairs, 38 based on Foata normal form. 2/1232 useless extension candidates. Maximal degree in co-relation 4465. Up to 242 conditions per place. [2022-07-12 10:27:29,136 INFO L132 encePairwiseOnDemand]: 58/80 looper letters, 131 selfloop transitions, 171 changer transitions 26/365 dead transitions. [2022-07-12 10:27:29,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 365 transitions, 3537 flow [2022-07-12 10:27:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-12 10:27:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-12 10:27:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3115 transitions. [2022-07-12 10:27:29,139 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6383196721311475 [2022-07-12 10:27:29,139 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3115 transitions. [2022-07-12 10:27:29,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3115 transitions. [2022-07-12 10:27:29,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:29,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3115 transitions. [2022-07-12 10:27:29,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 51.0655737704918) internal successors, (3115), 61 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states 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 10:27:29,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 80.0) internal successors, (4960), 62 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states 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 10:27:29,149 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 80.0) internal successors, (4960), 62 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states 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 10:27:29,149 INFO L186 Difference]: Start difference. First operand has 159 places, 149 transitions, 1372 flow. Second operand 61 states and 3115 transitions. [2022-07-12 10:27:29,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 365 transitions, 3537 flow [2022-07-12 10:27:29,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 365 transitions, 3297 flow, removed 32 selfloop flow, removed 19 redundant places. [2022-07-12 10:27:29,169 INFO L242 Difference]: Finished difference. Result has 227 places, 242 transitions, 2659 flow [2022-07-12 10:27:29,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2659, PETRI_PLACES=227, PETRI_TRANSITIONS=242} [2022-07-12 10:27:29,169 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 156 predicate places. [2022-07-12 10:27:29,170 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 242 transitions, 2659 flow [2022-07-12 10:27:29,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states 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 10:27:29,170 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:29,170 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] [2022-07-12 10:27:29,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:27:29,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:29,383 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -538219833, now seen corresponding path program 2 times [2022-07-12 10:27:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:29,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607777213] [2022-07-12 10:27:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:29,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:29,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607777213] [2022-07-12 10:27:29,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607777213] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:29,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984345302] [2022-07-12 10:27:29,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:27:29,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:29,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:29,961 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:27:29,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:27:30,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:27:30,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:27:30,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 10:27:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:30,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:28:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:28:19,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984345302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:28:19,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:28:19,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-07-12 10:28:19,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535857158] [2022-07-12 10:28:19,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:28:19,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 10:28:19,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:28:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 10:28:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 10:28:19,487 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-07-12 10:28:19,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 242 transitions, 2659 flow. Second operand has 38 states, 38 states have (on average 48.71052631578947) internal successors, (1851), 38 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states 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 10:28:19,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:28:19,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-07-12 10:28:19,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:28:25,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:28:29,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:28:37,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:28:38,176 INFO L129 PetriNetUnfolder]: 511/1670 cut-off events. [2022-07-12 10:28:38,176 INFO L130 PetriNetUnfolder]: For 11150/11150 co-relation queries the response was YES. [2022-07-12 10:28:38,184 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 1670 events. 511/1670 cut-off events. For 11150/11150 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13200 event pairs, 40 based on Foata normal form. 1/1667 useless extension candidates. Maximal degree in co-relation 7779. Up to 386 conditions per place. [2022-07-12 10:28:38,192 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 151 selfloop transitions, 336 changer transitions 21/545 dead transitions. [2022-07-12 10:28:38,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 545 transitions, 6778 flow [2022-07-12 10:28:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-12 10:28:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-07-12 10:28:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4494 transitions. [2022-07-12 10:28:38,197 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6383522727272727 [2022-07-12 10:28:38,197 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4494 transitions. [2022-07-12 10:28:38,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4494 transitions. [2022-07-12 10:28:38,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:28:38,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4494 transitions. [2022-07-12 10:28:38,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 51.06818181818182) internal successors, (4494), 88 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states 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 10:28:38,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 80.0) internal successors, (7120), 89 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states 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 10:28:38,212 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 80.0) internal successors, (7120), 89 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states 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 10:28:38,212 INFO L186 Difference]: Start difference. First operand has 227 places, 242 transitions, 2659 flow. Second operand 88 states and 4494 transitions. [2022-07-12 10:28:38,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 545 transitions, 6778 flow [2022-07-12 10:28:38,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 545 transitions, 6183 flow, removed 168 selfloop flow, removed 22 redundant places. [2022-07-12 10:28:38,263 INFO L242 Difference]: Finished difference. Result has 309 places, 421 transitions, 5403 flow [2022-07-12 10:28:38,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=5403, PETRI_PLACES=309, PETRI_TRANSITIONS=421} [2022-07-12 10:28:38,264 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 238 predicate places. [2022-07-12 10:28:38,264 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 421 transitions, 5403 flow [2022-07-12 10:28:38,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.71052631578947) internal successors, (1851), 38 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states 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 10:28:38,291 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:28:38,291 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:28:38,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:28:38,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 10:28:38,491 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:28:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:28:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1557988399, now seen corresponding path program 3 times [2022-07-12 10:28:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:28:38,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827602775] [2022-07-12 10:28:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:28:38,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:28:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:28:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:28:39,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:28:39,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827602775] [2022-07-12 10:28:39,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827602775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:28:39,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733290882] [2022-07-12 10:28:39,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:28:39,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:28:39,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:28:39,080 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:28:39,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:28:39,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:28:39,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:28:39,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 10:28:39,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:28:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:28:39,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:29:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:27,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733290882] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:29:27,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:29:27,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-07-12 10:29:27,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582895978] [2022-07-12 10:29:27,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:29:27,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 10:29:27,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:27,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 10:29:27,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 10:29:27,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-07-12 10:29:27,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 421 transitions, 5403 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states 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 10:29:27,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:27,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-07-12 10:29:27,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:54,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:30:00,815 INFO L129 PetriNetUnfolder]: 819/2548 cut-off events. [2022-07-12 10:30:00,816 INFO L130 PetriNetUnfolder]: For 24863/24863 co-relation queries the response was YES. [2022-07-12 10:30:00,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14394 conditions, 2548 events. 819/2548 cut-off events. For 24863/24863 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21802 event pairs, 29 based on Foata normal form. 3/2545 useless extension candidates. Maximal degree in co-relation 14316. Up to 442 conditions per place. [2022-07-12 10:30:00,844 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 249 selfloop transitions, 709 changer transitions 37/1032 dead transitions. [2022-07-12 10:30:00,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1032 transitions, 15266 flow [2022-07-12 10:30:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-07-12 10:30:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2022-07-12 10:30:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 8351 transitions. [2022-07-12 10:30:00,855 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6404141104294478 [2022-07-12 10:30:00,856 INFO L72 ComplementDD]: Start complementDD. Operand 163 states and 8351 transitions. [2022-07-12 10:30:00,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 8351 transitions. [2022-07-12 10:30:00,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:00,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 163 states and 8351 transitions. [2022-07-12 10:30:00,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 164 states, 163 states have (on average 51.23312883435583) internal successors, (8351), 163 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states 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 10:30:00,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 164 states, 164 states have (on average 80.0) internal successors, (13120), 164 states have internal predecessors, (13120), 0 states have call successors, (0), 0 states 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 10:30:00,934 INFO L81 ComplementDD]: Finished complementDD. Result has 164 states, 164 states have (on average 80.0) internal successors, (13120), 164 states have internal predecessors, (13120), 0 states have call successors, (0), 0 states 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 10:30:00,934 INFO L186 Difference]: Start difference. First operand has 309 places, 421 transitions, 5403 flow. Second operand 163 states and 8351 transitions. [2022-07-12 10:30:00,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1032 transitions, 15266 flow [2022-07-12 10:30:01,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1032 transitions, 14299 flow, removed 399 selfloop flow, removed 14 redundant places. [2022-07-12 10:30:01,085 INFO L242 Difference]: Finished difference. Result has 497 places, 814 transitions, 12636 flow [2022-07-12 10:30:01,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=4892, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=163, PETRI_FLOW=12636, PETRI_PLACES=497, PETRI_TRANSITIONS=814} [2022-07-12 10:30:01,087 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 426 predicate places. [2022-07-12 10:30:01,087 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 814 transitions, 12636 flow [2022-07-12 10:30:01,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states 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 10:30:01,087 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:30:01,087 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] [2022-07-12 10:30:01,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:30:01,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 10:30:01,296 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:30:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:30:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash -650742369, now seen corresponding path program 4 times [2022-07-12 10:30:01,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:30:01,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767800300] [2022-07-12 10:30:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:30:01,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:30:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:30:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:30:01,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:30:01,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767800300] [2022-07-12 10:30:01,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767800300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:30:01,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666997754] [2022-07-12 10:30:01,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:30:01,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:30:01,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:30:01,895 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:30:01,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:30:01,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:30:01,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:30:01,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 10:30:01,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:30:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:30:02,656 INFO L328 TraceCheckSpWp]: Computing backward predicates...