./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x3.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/bench-exp2x3.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 ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:19:28,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:19:28,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:19:28,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:19:28,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:19:28,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:19:28,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:19:28,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:19:28,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:19:28,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:19:28,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:19:28,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:19:28,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:19:28,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:19:28,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:19:28,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:19:28,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:19:28,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:19:28,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:19:28,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:19:28,820 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:19:28,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:19:28,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:19:28,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:19:28,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:19:28,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:19:28,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:19:28,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:19:28,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:19:28,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:19:28,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:19:28,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:19:28,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:19:28,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:19:28,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:19:28,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:19:28,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:19:28,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:19:28,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:19:28,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:19:28,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:19:28,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:19:28,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:19:28,868 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:19:28,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:19:28,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:19:28,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:19:28,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:19:28,870 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:19:28,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:19:28,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:19:28,871 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:19:28,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:19:28,872 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:19:28,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:19:28,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:19:28,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:19:28,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:19:28,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:19:28,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:19:28,873 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:19:28,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:19:28,874 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:19:28,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:19:28,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:19:28,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:19:28,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:19:28,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:19:28,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:19:28,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:19:28,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:19:28,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:19:28,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:19:28,876 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:19:28,876 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:19:28,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:19:28,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 [2022-07-12 10:19:29,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:19:29,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:19:29,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:19:29,097 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:19:29,099 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:19:29,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-07-12 10:19:29,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6542198b/b6b7ea3437554918b86c24865fd55961/FLAG866678e6d [2022-07-12 10:19:29,492 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:19:29,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-07-12 10:19:29,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6542198b/b6b7ea3437554918b86c24865fd55961/FLAG866678e6d [2022-07-12 10:19:29,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6542198b/b6b7ea3437554918b86c24865fd55961 [2022-07-12 10:19:29,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:19:29,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:19:29,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:19:29,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:19:29,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:19:29,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:19:29" (1/1) ... [2022-07-12 10:19:29,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d6e0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:29, skipping insertion in model container [2022-07-12 10:19:29,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:19:29" (1/1) ... [2022-07-12 10:19:29,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:19:29,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:19:30,069 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/bench-exp2x3.wvr.c[2237,2250] [2022-07-12 10:19:30,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:19:30,081 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:19:30,095 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/bench-exp2x3.wvr.c[2237,2250] [2022-07-12 10:19:30,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:19:30,105 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:19:30,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30 WrapperNode [2022-07-12 10:19:30,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:19:30,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:19:30,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:19:30,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:19:30,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,156 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-07-12 10:19:30,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:19:30,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:19:30,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:19:30,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:19:30,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:19:30,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:19:30,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:19:30,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:19:30,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (1/1) ... [2022-07-12 10:19:30,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:19:30,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:30,224 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 10:19:30,237 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 10:19:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:19:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:19:30,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:19:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:19:30,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:19:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:19:30,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:19:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-12 10:19:30,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-12 10:19:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:19:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:19:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:19:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:19:30,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:19:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:19:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:19:30,265 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 10:19:30,346 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:19:30,348 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:19:30,541 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:19:30,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:19:30,552 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 10:19:30,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:19:30 BoogieIcfgContainer [2022-07-12 10:19:30,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:19:30,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:19:30,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:19:30,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:19:30,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:19:29" (1/3) ... [2022-07-12 10:19:30,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b517dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:19:30, skipping insertion in model container [2022-07-12 10:19:30,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:19:30" (2/3) ... [2022-07-12 10:19:30,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b517dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:19:30, skipping insertion in model container [2022-07-12 10:19:30,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:19:30" (3/3) ... [2022-07-12 10:19:30,568 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2022-07-12 10:19:30,576 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:19:30,583 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:19:30,583 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:19:30,583 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:19:30,662 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:19:30,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 128 places, 125 transitions, 282 flow [2022-07-12 10:19:30,753 INFO L129 PetriNetUnfolder]: 10/121 cut-off events. [2022-07-12 10:19:30,753 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:19:30,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 121 events. 10/121 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2022-07-12 10:19:30,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 125 transitions, 282 flow [2022-07-12 10:19:30,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 108 transitions, 240 flow [2022-07-12 10:19:30,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:30,771 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@1afc67f5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@320d09ea [2022-07-12 10:19:30,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:19:30,818 INFO L129 PetriNetUnfolder]: 10/107 cut-off events. [2022-07-12 10:19:30,818 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:19:30,818 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:30,819 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:30,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash 129648811, now seen corresponding path program 1 times [2022-07-12 10:19:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:30,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494330569] [2022-07-12 10:19:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:30,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:31,019 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 10:19:31,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:31,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494330569] [2022-07-12 10:19:31,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494330569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:31,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:31,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:19:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074542180] [2022-07-12 10:19:31,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:31,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:19:31,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:31,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:19:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:19:31,052 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 125 [2022-07-12 10:19:31,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 108 transitions, 240 flow. Second operand has 2 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states 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 10:19:31,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:31,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 125 [2022-07-12 10:19:31,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:31,111 INFO L129 PetriNetUnfolder]: 4/102 cut-off events. [2022-07-12 10:19:31,111 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:19:31,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 102 events. 4/102 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 18/114 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-07-12 10:19:31,113 INFO L132 encePairwiseOnDemand]: 119/125 looper letters, 8 selfloop transitions, 0 changer transitions 2/102 dead transitions. [2022-07-12 10:19:31,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 102 transitions, 244 flow [2022-07-12 10:19:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:19:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:19:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 234 transitions. [2022-07-12 10:19:31,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.936 [2022-07-12 10:19:31,129 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 234 transitions. [2022-07-12 10:19:31,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 234 transitions. [2022-07-12 10:19:31,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:31,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 234 transitions. [2022-07-12 10:19:31,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 10:19:31,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 10:19:31,145 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 10:19:31,147 INFO L186 Difference]: Start difference. First operand has 111 places, 108 transitions, 240 flow. Second operand 2 states and 234 transitions. [2022-07-12 10:19:31,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 102 transitions, 244 flow [2022-07-12 10:19:31,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-12 10:19:31,157 INFO L242 Difference]: Finished difference. Result has 104 places, 100 transitions, 208 flow [2022-07-12 10:19:31,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=208, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-07-12 10:19:31,163 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, -7 predicate places. [2022-07-12 10:19:31,163 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 208 flow [2022-07-12 10:19:31,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states 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 10:19:31,164 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:31,164 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:31,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:19:31,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:31,166 INFO L85 PathProgramCache]: Analyzing trace with hash 560355165, now seen corresponding path program 1 times [2022-07-12 10:19:31,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:31,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339599025] [2022-07-12 10:19:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:31,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:31,550 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 10:19:31,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:31,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339599025] [2022-07-12 10:19:31,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339599025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:31,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:31,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:19:31,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003859837] [2022-07-12 10:19:31,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:31,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:19:31,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:19:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:19:31,560 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 125 [2022-07-12 10:19:31,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 10:19:31,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:31,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 125 [2022-07-12 10:19:31,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:31,908 INFO L129 PetriNetUnfolder]: 895/1458 cut-off events. [2022-07-12 10:19:31,909 INFO L130 PetriNetUnfolder]: For 80/134 co-relation queries the response was YES. [2022-07-12 10:19:31,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2774 conditions, 1458 events. 895/1458 cut-off events. For 80/134 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6472 event pairs, 272 based on Foata normal form. 1/1011 useless extension candidates. Maximal degree in co-relation 2771. Up to 796 conditions per place. [2022-07-12 10:19:31,919 INFO L132 encePairwiseOnDemand]: 115/125 looper letters, 47 selfloop transitions, 7 changer transitions 4/122 dead transitions. [2022-07-12 10:19:31,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 122 transitions, 375 flow [2022-07-12 10:19:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:19:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:19:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2022-07-12 10:19:31,922 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7074285714285714 [2022-07-12 10:19:31,922 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2022-07-12 10:19:31,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2022-07-12 10:19:31,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:31,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2022-07-12 10:19:31,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:31,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:31,927 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:31,927 INFO L186 Difference]: Start difference. First operand has 104 places, 100 transitions, 208 flow. Second operand 7 states and 619 transitions. [2022-07-12 10:19:31,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 122 transitions, 375 flow [2022-07-12 10:19:31,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 122 transitions, 375 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:31,930 INFO L242 Difference]: Finished difference. Result has 111 places, 104 transitions, 249 flow [2022-07-12 10:19:31,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=111, PETRI_TRANSITIONS=104} [2022-07-12 10:19:31,930 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 0 predicate places. [2022-07-12 10:19:31,931 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 104 transitions, 249 flow [2022-07-12 10:19:31,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 10:19:31,931 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:31,931 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:31,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:19:31,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1559793883, now seen corresponding path program 1 times [2022-07-12 10:19:31,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:31,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645338087] [2022-07-12 10:19:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:31,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:32,076 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 10:19:32,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:32,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645338087] [2022-07-12 10:19:32,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645338087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:32,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:32,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:19:32,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768183893] [2022-07-12 10:19:32,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:19:32,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:19:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:19:32,081 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 125 [2022-07-12 10:19:32,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 104 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 10:19:32,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:32,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 125 [2022-07-12 10:19:32,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:32,374 INFO L129 PetriNetUnfolder]: 1043/2032 cut-off events. [2022-07-12 10:19:32,374 INFO L130 PetriNetUnfolder]: For 229/268 co-relation queries the response was YES. [2022-07-12 10:19:32,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4006 conditions, 2032 events. 1043/2032 cut-off events. For 229/268 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11929 event pairs, 266 based on Foata normal form. 1/1431 useless extension candidates. Maximal degree in co-relation 3999. Up to 512 conditions per place. [2022-07-12 10:19:32,391 INFO L132 encePairwiseOnDemand]: 112/125 looper letters, 58 selfloop transitions, 19 changer transitions 0/147 dead transitions. [2022-07-12 10:19:32,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 147 transitions, 522 flow [2022-07-12 10:19:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:19:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:19:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 662 transitions. [2022-07-12 10:19:32,394 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7565714285714286 [2022-07-12 10:19:32,394 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 662 transitions. [2022-07-12 10:19:32,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 662 transitions. [2022-07-12 10:19:32,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:32,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 662 transitions. [2022-07-12 10:19:32,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.57142857142857) internal successors, (662), 7 states have internal predecessors, (662), 0 states have call successors, (0), 0 states 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 10:19:32,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:32,398 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:32,398 INFO L186 Difference]: Start difference. First operand has 111 places, 104 transitions, 249 flow. Second operand 7 states and 662 transitions. [2022-07-12 10:19:32,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 147 transitions, 522 flow [2022-07-12 10:19:32,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 147 transitions, 503 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-12 10:19:32,405 INFO L242 Difference]: Finished difference. Result has 113 places, 114 transitions, 342 flow [2022-07-12 10:19:32,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=113, PETRI_TRANSITIONS=114} [2022-07-12 10:19:32,406 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 2 predicate places. [2022-07-12 10:19:32,407 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 114 transitions, 342 flow [2022-07-12 10:19:32,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 10:19:32,407 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:32,407 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:32,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:19:32,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:32,409 INFO L85 PathProgramCache]: Analyzing trace with hash 920643877, now seen corresponding path program 1 times [2022-07-12 10:19:32,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:32,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344885950] [2022-07-12 10:19:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:32,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:32,640 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 10:19:32,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344885950] [2022-07-12 10:19:32,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344885950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:32,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650746261] [2022-07-12 10:19:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:32,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:32,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:32,643 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 10:19:32,644 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 10:19:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:32,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:19:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:32,955 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 10:19:32,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:33,134 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 10:19:33,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650746261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:33,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:33,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-12 10:19:33,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094996863] [2022-07-12 10:19:33,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:33,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:19:33,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:19:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:19:33,137 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-12 10:19:33,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 114 transitions, 342 flow. Second operand has 14 states, 14 states have (on average 81.71428571428571) internal successors, (1144), 14 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states 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 10:19:33,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:33,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-12 10:19:33,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:34,084 INFO L129 PetriNetUnfolder]: 2556/4598 cut-off events. [2022-07-12 10:19:34,084 INFO L130 PetriNetUnfolder]: For 3486/3505 co-relation queries the response was YES. [2022-07-12 10:19:34,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 4598 events. 2556/4598 cut-off events. For 3486/3505 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29747 event pairs, 270 based on Foata normal form. 1/4004 useless extension candidates. Maximal degree in co-relation 11811. Up to 1129 conditions per place. [2022-07-12 10:19:34,112 INFO L132 encePairwiseOnDemand]: 110/125 looper letters, 175 selfloop transitions, 30 changer transitions 1/268 dead transitions. [2022-07-12 10:19:34,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 268 transitions, 1440 flow [2022-07-12 10:19:34,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:19:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:19:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1252 transitions. [2022-07-12 10:19:34,120 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7154285714285714 [2022-07-12 10:19:34,120 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1252 transitions. [2022-07-12 10:19:34,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1252 transitions. [2022-07-12 10:19:34,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:34,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1252 transitions. [2022-07-12 10:19:34,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.42857142857143) internal successors, (1252), 14 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 10:19:34,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 10:19:34,126 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 10:19:34,126 INFO L186 Difference]: Start difference. First operand has 113 places, 114 transitions, 342 flow. Second operand 14 states and 1252 transitions. [2022-07-12 10:19:34,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 268 transitions, 1440 flow [2022-07-12 10:19:34,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 268 transitions, 1436 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:19:34,136 INFO L242 Difference]: Finished difference. Result has 133 places, 132 transitions, 549 flow [2022-07-12 10:19:34,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=549, PETRI_PLACES=133, PETRI_TRANSITIONS=132} [2022-07-12 10:19:34,137 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 22 predicate places. [2022-07-12 10:19:34,138 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 132 transitions, 549 flow [2022-07-12 10:19:34,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.71428571428571) internal successors, (1144), 14 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states 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 10:19:34,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:34,138 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:34,161 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 10:19:34,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:34,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash -571222771, now seen corresponding path program 2 times [2022-07-12 10:19:34,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:34,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861883923] [2022-07-12 10:19:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:34,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:34,569 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 10:19:34,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:34,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861883923] [2022-07-12 10:19:34,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861883923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:34,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:34,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:19:34,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990322570] [2022-07-12 10:19:34,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:34,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:19:34,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:34,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:19:34,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:19:34,571 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-12 10:19:34,571 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 132 transitions, 549 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 10:19:34,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:34,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-12 10:19:34,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:35,059 INFO L129 PetriNetUnfolder]: 2506/4537 cut-off events. [2022-07-12 10:19:35,059 INFO L130 PetriNetUnfolder]: For 9876/9971 co-relation queries the response was YES. [2022-07-12 10:19:35,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15051 conditions, 4537 events. 2506/4537 cut-off events. For 9876/9971 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29778 event pairs, 896 based on Foata normal form. 26/4246 useless extension candidates. Maximal degree in co-relation 15034. Up to 3151 conditions per place. [2022-07-12 10:19:35,097 INFO L132 encePairwiseOnDemand]: 114/125 looper letters, 81 selfloop transitions, 15 changer transitions 2/160 dead transitions. [2022-07-12 10:19:35,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 885 flow [2022-07-12 10:19:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:19:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:19:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 538 transitions. [2022-07-12 10:19:35,099 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7173333333333334 [2022-07-12 10:19:35,099 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 538 transitions. [2022-07-12 10:19:35,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 538 transitions. [2022-07-12 10:19:35,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:35,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 538 transitions. [2022-07-12 10:19:35,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states 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 10:19:35,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 10:19:35,102 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 10:19:35,102 INFO L186 Difference]: Start difference. First operand has 133 places, 132 transitions, 549 flow. Second operand 6 states and 538 transitions. [2022-07-12 10:19:35,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 885 flow [2022-07-12 10:19:35,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 160 transitions, 868 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:19:35,113 INFO L242 Difference]: Finished difference. Result has 136 places, 134 transitions, 587 flow [2022-07-12 10:19:35,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=587, PETRI_PLACES=136, PETRI_TRANSITIONS=134} [2022-07-12 10:19:35,114 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 25 predicate places. [2022-07-12 10:19:35,114 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 134 transitions, 587 flow [2022-07-12 10:19:35,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 10:19:35,114 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:35,114 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:35,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:19:35,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:35,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1166830447, now seen corresponding path program 2 times [2022-07-12 10:19:35,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:35,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015125142] [2022-07-12 10:19:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:35,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:35,282 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 10:19:35,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015125142] [2022-07-12 10:19:35,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015125142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:35,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:35,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:19:35,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448017837] [2022-07-12 10:19:35,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:35,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:19:35,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:35,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:19:35,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:19:35,285 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-12 10:19:35,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 134 transitions, 587 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 10:19:35,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:35,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-12 10:19:35,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:35,748 INFO L129 PetriNetUnfolder]: 2307/4169 cut-off events. [2022-07-12 10:19:35,748 INFO L130 PetriNetUnfolder]: For 10203/10286 co-relation queries the response was YES. [2022-07-12 10:19:35,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14651 conditions, 4169 events. 2307/4169 cut-off events. For 10203/10286 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26701 event pairs, 1058 based on Foata normal form. 32/3915 useless extension candidates. Maximal degree in co-relation 14631. Up to 2939 conditions per place. [2022-07-12 10:19:35,819 INFO L132 encePairwiseOnDemand]: 114/125 looper letters, 82 selfloop transitions, 18 changer transitions 5/167 dead transitions. [2022-07-12 10:19:35,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 167 transitions, 1009 flow [2022-07-12 10:19:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:19:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:19:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 538 transitions. [2022-07-12 10:19:35,821 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7173333333333334 [2022-07-12 10:19:35,821 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 538 transitions. [2022-07-12 10:19:35,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 538 transitions. [2022-07-12 10:19:35,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:35,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 538 transitions. [2022-07-12 10:19:35,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states 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 10:19:35,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 10:19:35,823 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 10:19:35,823 INFO L186 Difference]: Start difference. First operand has 136 places, 134 transitions, 587 flow. Second operand 6 states and 538 transitions. [2022-07-12 10:19:35,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 167 transitions, 1009 flow [2022-07-12 10:19:35,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 167 transitions, 987 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-12 10:19:35,838 INFO L242 Difference]: Finished difference. Result has 140 places, 139 transitions, 689 flow [2022-07-12 10:19:35,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=689, PETRI_PLACES=140, PETRI_TRANSITIONS=139} [2022-07-12 10:19:35,839 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 29 predicate places. [2022-07-12 10:19:35,839 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 139 transitions, 689 flow [2022-07-12 10:19:35,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 10:19:35,839 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:35,840 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:35,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:19:35,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:35,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash 557506817, now seen corresponding path program 1 times [2022-07-12 10:19:35,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:35,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169166209] [2022-07-12 10:19:35,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:35,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:35,993 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 10:19:35,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:35,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169166209] [2022-07-12 10:19:35,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169166209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251527669] [2022-07-12 10:19:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:35,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:35,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:35,995 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 10:19:35,996 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 10:19:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:19:36,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:36,286 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 10:19:36,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:36,467 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 10:19:36,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251527669] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:36,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:36,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-12 10:19:36,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199630773] [2022-07-12 10:19:36,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:36,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:19:36,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:36,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:19:36,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:19:36,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-12 10:19:36,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 139 transitions, 689 flow. Second operand has 14 states, 14 states have (on average 82.28571428571429) internal successors, (1152), 14 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states 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 10:19:36,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:36,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-12 10:19:36,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:37,454 INFO L129 PetriNetUnfolder]: 3235/5863 cut-off events. [2022-07-12 10:19:37,454 INFO L130 PetriNetUnfolder]: For 16618/16722 co-relation queries the response was YES. [2022-07-12 10:19:37,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21013 conditions, 5863 events. 3235/5863 cut-off events. For 16618/16722 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40482 event pairs, 458 based on Foata normal form. 177/5802 useless extension candidates. Maximal degree in co-relation 20991. Up to 1542 conditions per place. [2022-07-12 10:19:37,501 INFO L132 encePairwiseOnDemand]: 110/125 looper letters, 206 selfloop transitions, 34 changer transitions 2/304 dead transitions. [2022-07-12 10:19:37,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 304 transitions, 2235 flow [2022-07-12 10:19:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:19:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:19:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1248 transitions. [2022-07-12 10:19:37,505 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7131428571428572 [2022-07-12 10:19:37,505 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1248 transitions. [2022-07-12 10:19:37,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1248 transitions. [2022-07-12 10:19:37,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:37,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1248 transitions. [2022-07-12 10:19:37,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.14285714285714) internal successors, (1248), 14 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states 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 10:19:37,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 10:19:37,511 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 10:19:37,511 INFO L186 Difference]: Start difference. First operand has 140 places, 139 transitions, 689 flow. Second operand 14 states and 1248 transitions. [2022-07-12 10:19:37,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 304 transitions, 2235 flow [2022-07-12 10:19:37,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 304 transitions, 2157 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-07-12 10:19:37,542 INFO L242 Difference]: Finished difference. Result has 157 places, 149 transitions, 842 flow [2022-07-12 10:19:37,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=842, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2022-07-12 10:19:37,543 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 46 predicate places. [2022-07-12 10:19:37,543 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 842 flow [2022-07-12 10:19:37,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.28571428571429) internal successors, (1152), 14 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states 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 10:19:37,546 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:37,546 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:37,570 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 10:19:37,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-12 10:19:37,760 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1750943981, now seen corresponding path program 2 times [2022-07-12 10:19:37,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:37,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931518916] [2022-07-12 10:19:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:37,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:37,928 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 10:19:37,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:37,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931518916] [2022-07-12 10:19:37,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931518916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:37,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:37,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:19:37,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271974332] [2022-07-12 10:19:37,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:37,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:19:37,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:37,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:19:37,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:19:37,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-12 10:19:37,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 842 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 10:19:37,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:37,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-12 10:19:37,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:38,546 INFO L129 PetriNetUnfolder]: 3125/5514 cut-off events. [2022-07-12 10:19:38,547 INFO L130 PetriNetUnfolder]: For 18961/19023 co-relation queries the response was YES. [2022-07-12 10:19:38,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22407 conditions, 5514 events. 3125/5514 cut-off events. For 18961/19023 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37200 event pairs, 848 based on Foata normal form. 10/5332 useless extension candidates. Maximal degree in co-relation 22379. Up to 4139 conditions per place. [2022-07-12 10:19:38,590 INFO L132 encePairwiseOnDemand]: 115/125 looper letters, 89 selfloop transitions, 17 changer transitions 8/176 dead transitions. [2022-07-12 10:19:38,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 176 transitions, 1224 flow [2022-07-12 10:19:38,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:19:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:19:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2022-07-12 10:19:38,592 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.716 [2022-07-12 10:19:38,592 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2022-07-12 10:19:38,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2022-07-12 10:19:38,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:38,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2022-07-12 10:19:38,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 10:19:38,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 10:19:38,596 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 10:19:38,596 INFO L186 Difference]: Start difference. First operand has 157 places, 149 transitions, 842 flow. Second operand 6 states and 537 transitions. [2022-07-12 10:19:38,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 176 transitions, 1224 flow [2022-07-12 10:19:38,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 176 transitions, 1189 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-12 10:19:38,639 INFO L242 Difference]: Finished difference. Result has 159 places, 150 transitions, 858 flow [2022-07-12 10:19:38,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=858, PETRI_PLACES=159, PETRI_TRANSITIONS=150} [2022-07-12 10:19:38,641 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 48 predicate places. [2022-07-12 10:19:38,641 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 150 transitions, 858 flow [2022-07-12 10:19:38,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 10:19:38,642 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:38,642 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:38,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:19:38,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1325521599, now seen corresponding path program 3 times [2022-07-12 10:19:38,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:38,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940911448] [2022-07-12 10:19:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:38,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:38,724 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 10:19:38,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:38,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940911448] [2022-07-12 10:19:38,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940911448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:38,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741923802] [2022-07-12 10:19:38,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:19:38,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:38,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:38,727 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 10:19:38,729 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 10:19:38,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:19:38,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:19:38,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:19:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:39,006 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 10:19:39,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:39,154 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 10:19:39,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741923802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:39,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:39,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-12 10:19:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143005771] [2022-07-12 10:19:39,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:39,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:19:39,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:19:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:19:39,159 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 125 [2022-07-12 10:19:39,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 150 transitions, 858 flow. Second operand has 10 states, 10 states have (on average 88.4) internal successors, (884), 10 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 10:19:39,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:39,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 125 [2022-07-12 10:19:39,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:40,019 INFO L129 PetriNetUnfolder]: 3265/6219 cut-off events. [2022-07-12 10:19:40,019 INFO L130 PetriNetUnfolder]: For 20783/20885 co-relation queries the response was YES. [2022-07-12 10:19:40,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24384 conditions, 6219 events. 3265/6219 cut-off events. For 20783/20885 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 46909 event pairs, 373 based on Foata normal form. 158/6131 useless extension candidates. Maximal degree in co-relation 24353. Up to 2069 conditions per place. [2022-07-12 10:19:40,169 INFO L132 encePairwiseOnDemand]: 112/125 looper letters, 131 selfloop transitions, 30 changer transitions 0/240 dead transitions. [2022-07-12 10:19:40,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 240 transitions, 1771 flow [2022-07-12 10:19:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:19:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:19:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1106 transitions. [2022-07-12 10:19:40,172 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7373333333333333 [2022-07-12 10:19:40,172 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1106 transitions. [2022-07-12 10:19:40,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1106 transitions. [2022-07-12 10:19:40,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:40,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1106 transitions. [2022-07-12 10:19:40,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.16666666666667) internal successors, (1106), 12 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states 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 10:19:40,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states 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 10:19:40,177 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states 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 10:19:40,177 INFO L186 Difference]: Start difference. First operand has 159 places, 150 transitions, 858 flow. Second operand 12 states and 1106 transitions. [2022-07-12 10:19:40,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 240 transitions, 1771 flow [2022-07-12 10:19:40,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 240 transitions, 1746 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-07-12 10:19:40,226 INFO L242 Difference]: Finished difference. Result has 170 places, 158 transitions, 996 flow [2022-07-12 10:19:40,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=996, PETRI_PLACES=170, PETRI_TRANSITIONS=158} [2022-07-12 10:19:40,227 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 59 predicate places. [2022-07-12 10:19:40,227 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 158 transitions, 996 flow [2022-07-12 10:19:40,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.4) internal successors, (884), 10 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 10:19:40,228 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:40,228 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:40,247 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 10:19:40,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:40,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash -13600267, now seen corresponding path program 1 times [2022-07-12 10:19:40,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:40,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634132487] [2022-07-12 10:19:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:40,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:40,579 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 10:19:40,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:40,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634132487] [2022-07-12 10:19:40,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634132487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:40,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005794431] [2022-07-12 10:19:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:40,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:40,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:40,582 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 10:19:40,583 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 10:19:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:40,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:19:40,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:40,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:40,916 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 10:19:40,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005794431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:40,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:40,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-12 10:19:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103686198] [2022-07-12 10:19:40,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:40,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:19:40,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:19:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:19:40,919 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-12 10:19:40,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 158 transitions, 996 flow. Second operand has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 10:19:40,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:40,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-12 10:19:40,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:42,303 INFO L129 PetriNetUnfolder]: 5063/8597 cut-off events. [2022-07-12 10:19:42,304 INFO L130 PetriNetUnfolder]: For 40129/40192 co-relation queries the response was YES. [2022-07-12 10:19:42,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38136 conditions, 8597 events. 5063/8597 cut-off events. For 40129/40192 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 60765 event pairs, 980 based on Foata normal form. 132/8573 useless extension candidates. Maximal degree in co-relation 38103. Up to 3224 conditions per place. [2022-07-12 10:19:42,377 INFO L132 encePairwiseOnDemand]: 110/125 looper letters, 296 selfloop transitions, 32 changer transitions 2/392 dead transitions. [2022-07-12 10:19:42,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 392 transitions, 3771 flow [2022-07-12 10:19:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:19:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:19:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1246 transitions. [2022-07-12 10:19:42,380 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.712 [2022-07-12 10:19:42,380 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1246 transitions. [2022-07-12 10:19:42,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1246 transitions. [2022-07-12 10:19:42,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:42,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1246 transitions. [2022-07-12 10:19:42,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states 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 10:19:42,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 10:19:42,386 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 10:19:42,386 INFO L186 Difference]: Start difference. First operand has 170 places, 158 transitions, 996 flow. Second operand 14 states and 1246 transitions. [2022-07-12 10:19:42,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 392 transitions, 3771 flow [2022-07-12 10:19:42,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 392 transitions, 3571 flow, removed 70 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:42,587 INFO L242 Difference]: Finished difference. Result has 181 places, 164 transitions, 1091 flow [2022-07-12 10:19:42,588 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1091, PETRI_PLACES=181, PETRI_TRANSITIONS=164} [2022-07-12 10:19:42,588 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 70 predicate places. [2022-07-12 10:19:42,588 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 164 transitions, 1091 flow [2022-07-12 10:19:42,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states 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 10:19:42,589 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:42,589 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:42,608 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 10:19:42,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:42,800 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:19:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash -95233455, now seen corresponding path program 1 times [2022-07-12 10:19:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:42,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633079412] [2022-07-12 10:19:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:42,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:43,193 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 10:19:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:43,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633079412] [2022-07-12 10:19:43,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633079412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:43,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576062234] [2022-07-12 10:19:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:43,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:43,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:43,198 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 10:19:43,200 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 10:19:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:19:43,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:09,424 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 10:20:09,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:33,758 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 10:20:33,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576062234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:33,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:33,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-07-12 10:20:33,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449050849] [2022-07-12 10:20:33,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:33,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 10:20:33,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 10:20:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=546, Unknown=3, NotChecked=0, Total=702 [2022-07-12 10:20:33,761 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-12 10:20:33,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 164 transitions, 1091 flow. Second operand has 27 states, 27 states have (on average 80.5925925925926) internal successors, (2176), 27 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 10:20:33,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:33,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-12 10:20:33,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:35,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:20:36,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:20:46,032 WARN L233 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 58 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:20:59,067 WARN L534 Checker$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 10:21:01,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:03,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:05,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:07,503 WARN L534 Checker$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 10:21:09,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:11,522 WARN L534 Checker$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 10:21:13,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:15,586 WARN L534 Checker$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 10:21:17,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:19,738 WARN L534 Checker$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 10:21:21,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:23,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:25,001 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:27,008 WARN L534 Checker$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 10:21:30,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:33,577 WARN L534 Checker$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 10:21:37,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:21:50,070 WARN L534 Checker$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 10:21:56,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:05,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:17,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:19,369 WARN L534 Checker$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 10:22:21,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:29,995 WARN L534 Checker$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 10:22:32,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:34,753 WARN L534 Checker$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 10:22:39,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:42,751 WARN L534 Checker$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 10:22:46,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:48,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:50,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:52,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:22:54,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:03,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:05,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:07,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:09,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:11,865 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:19,856 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 53 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:23:23,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:25,886 WARN L534 Checker$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 10:23:30,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:32,472 WARN L534 Checker$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 10:23:34,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:36,550 WARN L534 Checker$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 10:23:38,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:41,791 WARN L534 Checker$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 10:23:46,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:23:50,082 WARN L534 Checker$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 10:24:00,861 INFO L129 PetriNetUnfolder]: 11136/19312 cut-off events. [2022-07-12 10:24:00,861 INFO L130 PetriNetUnfolder]: For 99202/99457 co-relation queries the response was YES. [2022-07-12 10:24:00,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87501 conditions, 19312 events. 11136/19312 cut-off events. For 99202/99457 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 159444 event pairs, 1119 based on Foata normal form. 73/18889 useless extension candidates. Maximal degree in co-relation 87464. Up to 8938 conditions per place. [2022-07-12 10:24:01,030 INFO L132 encePairwiseOnDemand]: 105/125 looper letters, 400 selfloop transitions, 228 changer transitions 22/712 dead transitions. [2022-07-12 10:24:01,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 712 transitions, 7113 flow [2022-07-12 10:24:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 10:24:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 10:24:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2920 transitions. [2022-07-12 10:24:01,035 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7078787878787879 [2022-07-12 10:24:01,035 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2920 transitions. [2022-07-12 10:24:01,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2920 transitions. [2022-07-12 10:24:01,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:01,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2920 transitions. [2022-07-12 10:24:01,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 88.48484848484848) internal successors, (2920), 33 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states 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 10:24:01,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 125.0) internal successors, (4250), 34 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states 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 10:24:01,047 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 125.0) internal successors, (4250), 34 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states 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 10:24:01,047 INFO L186 Difference]: Start difference. First operand has 181 places, 164 transitions, 1091 flow. Second operand 33 states and 2920 transitions. [2022-07-12 10:24:01,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 712 transitions, 7113 flow [2022-07-12 10:24:01,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 712 transitions, 6954 flow, removed 55 selfloop flow, removed 8 redundant places. [2022-07-12 10:24:01,407 INFO L242 Difference]: Finished difference. Result has 222 places, 373 transitions, 4055 flow [2022-07-12 10:24:01,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4055, PETRI_PLACES=222, PETRI_TRANSITIONS=373} [2022-07-12 10:24:01,407 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 111 predicate places. [2022-07-12 10:24:01,408 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 373 transitions, 4055 flow [2022-07-12 10:24:01,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 80.5925925925926) internal successors, (2176), 27 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 10:24:01,408 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:01,409 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:01,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 10:24:01,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 10:24:01,613 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:24:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1971776909, now seen corresponding path program 1 times [2022-07-12 10:24:01,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:01,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083573951] [2022-07-12 10:24:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:01,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:01,963 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 10:24:01,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:01,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083573951] [2022-07-12 10:24:01,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083573951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:24:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008991964] [2022-07-12 10:24:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:24:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:24:01,965 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 10:24:01,967 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 10:24:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:03,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 10:24:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates...