./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe008_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-wmm/safe008_tso.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3447fa4cbed8c2dd9f8bb92c4d44acca15639ccfd4d81b58d710cf11090f115c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:31:39,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:31:39,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:31:39,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:31:39,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:31:40,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:31:40,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:31:40,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:31:40,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:31:40,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:31:40,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:31:40,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:31:40,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:31:40,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:31:40,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:31:40,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:31:40,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:31:40,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:31:40,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:31:40,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:31:40,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:31:40,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:31:40,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:31:40,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:31:40,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:31:40,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:31:40,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:31:40,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:31:40,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:31:40,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:31:40,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:31:40,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:31:40,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:31:40,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:31:40,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:31:40,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:31:40,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:31:40,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:31:40,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:31:40,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:31:40,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:31:40,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:31:40,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:31:40,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:31:40,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:31:40,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:31:40,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:31:40,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:31:40,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:31:40,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:31:40,102 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:31:40,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:31:40,103 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:31:40,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:31:40,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:31:40,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:31:40,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:31:40,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:31:40,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:31:40,104 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:31:40,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:31:40,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:31:40,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:31:40,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:31:40,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:31:40,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:31:40,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:31:40,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:31:40,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:31:40,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:31:40,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:31:40,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:31:40,107 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:31:40,107 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:31:40,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:31:40,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:31:40,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3447fa4cbed8c2dd9f8bb92c4d44acca15639ccfd4d81b58d710cf11090f115c [2021-12-22 13:31:40,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:31:40,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:31:40,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:31:40,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:31:40,503 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:31:40,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe008_tso.i [2021-12-22 13:31:40,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead2caee6/d722590be3d640049cd24f6b3978f2d7/FLAG868533bab [2021-12-22 13:31:41,038 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:31:41,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe008_tso.i [2021-12-22 13:31:41,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead2caee6/d722590be3d640049cd24f6b3978f2d7/FLAG868533bab [2021-12-22 13:31:41,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead2caee6/d722590be3d640049cd24f6b3978f2d7 [2021-12-22 13:31:41,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:31:41,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:31:41,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:31:41,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:31:41,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:31:41,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24255db5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41, skipping insertion in model container [2021-12-22 13:31:41,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:31:41,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:31:41,661 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe008_tso.i[945,958] [2021-12-22 13:31:41,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:31:41,745 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:31:41,753 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe008_tso.i[945,958] [2021-12-22 13:31:41,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:31:41,814 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:31:41,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41 WrapperNode [2021-12-22 13:31:41,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:31:41,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:31:41,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:31:41,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:31:41,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,864 INFO L137 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-12-22 13:31:41,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:31:41,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:31:41,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:31:41,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:31:41,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:31:41,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:31:41,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:31:41,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:31:41,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (1/1) ... [2021-12-22 13:31:41,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:31:41,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:31:41,957 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) [2021-12-22 13:31:41,992 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 [2021-12-22 13:31:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:31:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:31:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:31:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:31:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:31:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-12-22 13:31:42,017 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-12-22 13:31:42,017 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-12-22 13:31:42,017 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-12-22 13:31:42,017 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-12-22 13:31:42,018 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-12-22 13:31:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:31:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:31:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:31:42,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:31:42,019 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:31:42,113 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:31:42,114 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:31:42,246 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:31:42,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:31:42,253 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 13:31:42,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:31:42 BoogieIcfgContainer [2021-12-22 13:31:42,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:31:42,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:31:42,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:31:42,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:31:42,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:31:41" (1/3) ... [2021-12-22 13:31:42,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cf7743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:31:42, skipping insertion in model container [2021-12-22 13:31:42,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:41" (2/3) ... [2021-12-22 13:31:42,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cf7743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:31:42, skipping insertion in model container [2021-12-22 13:31:42,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:31:42" (3/3) ... [2021-12-22 13:31:42,260 INFO L111 eAbstractionObserver]: Analyzing ICFG safe008_tso.i [2021-12-22 13:31:42,263 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:31:42,263 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:31:42,264 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:31:42,264 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:31:42,288 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,289 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,289 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,289 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,289 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,289 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,290 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,290 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,290 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,290 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,291 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,291 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,291 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,291 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,291 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,292 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,292 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,292 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,292 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,292 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,293 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,293 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,293 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,293 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,294 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,294 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,294 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,294 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,294 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,294 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,295 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,295 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,295 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,295 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,295 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,296 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,298 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,313 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,314 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,314 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,316 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,316 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,316 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,316 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,317 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,317 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,317 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,318 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:42,318 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-22 13:31:42,362 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:31:42,367 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:31:42,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-22 13:31:42,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 92 transitions, 199 flow [2021-12-22 13:31:42,400 INFO L129 PetriNetUnfolder]: 2/89 cut-off events. [2021-12-22 13:31:42,400 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:31:42,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2021-12-22 13:31:42,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 92 transitions, 199 flow [2021-12-22 13:31:42,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 75 transitions, 159 flow [2021-12-22 13:31:42,418 INFO L129 PetriNetUnfolder]: 1/74 cut-off events. [2021-12-22 13:31:42,419 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:31:42,419 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:42,419 INFO L254 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] [2021-12-22 13:31:42,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1402349347, now seen corresponding path program 1 times [2021-12-22 13:31:42,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:42,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131727018] [2021-12-22 13:31:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:42,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:42,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131727018] [2021-12-22 13:31:42,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131727018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:42,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:42,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:31:42,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592287705] [2021-12-22 13:31:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:42,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:31:42,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:31:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:31:42,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 92 [2021-12-22 13:31:42,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:42,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:42,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 92 [2021-12-22 13:31:42,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:43,066 INFO L129 PetriNetUnfolder]: 182/601 cut-off events. [2021-12-22 13:31:43,066 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-22 13:31:43,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 601 events. 182/601 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3474 event pairs, 43 based on Foata normal form. 21/609 useless extension candidates. Maximal degree in co-relation 920. Up to 153 conditions per place. [2021-12-22 13:31:43,072 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 20 selfloop transitions, 5 changer transitions 28/111 dead transitions. [2021-12-22 13:31:43,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 343 flow [2021-12-22 13:31:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:31:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:31:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 705 transitions. [2021-12-22 13:31:43,084 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8514492753623188 [2021-12-22 13:31:43,085 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 705 transitions. [2021-12-22 13:31:43,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 705 transitions. [2021-12-22 13:31:43,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:43,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 705 transitions. [2021-12-22 13:31:43,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.33333333333333) internal successors, (705), 9 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,098 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,099 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 159 flow. Second operand 9 states and 705 transitions. [2021-12-22 13:31:43,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 343 flow [2021-12-22 13:31:43,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 338 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-22 13:31:43,105 INFO L242 Difference]: Finished difference. Result has 96 places, 77 transitions, 213 flow [2021-12-22 13:31:43,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=213, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2021-12-22 13:31:43,108 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 12 predicate places. [2021-12-22 13:31:43,108 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 213 flow [2021-12-22 13:31:43,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:43,109 INFO L254 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] [2021-12-22 13:31:43,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:31:43,110 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:43,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:43,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1036485730, now seen corresponding path program 1 times [2021-12-22 13:31:43,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:43,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348632768] [2021-12-22 13:31:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:43,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:43,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:43,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348632768] [2021-12-22 13:31:43,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348632768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:43,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:43,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:43,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554439659] [2021-12-22 13:31:43,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:43,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:43,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:43,223 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 92 [2021-12-22 13:31:43,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 213 flow. Second operand has 7 states, 7 states have (on average 73.85714285714286) internal successors, (517), 7 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:43,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 92 [2021-12-22 13:31:43,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:43,442 INFO L129 PetriNetUnfolder]: 120/422 cut-off events. [2021-12-22 13:31:43,442 INFO L130 PetriNetUnfolder]: For 669/809 co-relation queries the response was YES. [2021-12-22 13:31:43,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 422 events. 120/422 cut-off events. For 669/809 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2095 event pairs, 7 based on Foata normal form. 11/420 useless extension candidates. Maximal degree in co-relation 1156. Up to 120 conditions per place. [2021-12-22 13:31:43,448 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 20 selfloop transitions, 7 changer transitions 34/119 dead transitions. [2021-12-22 13:31:43,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 626 flow [2021-12-22 13:31:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:31:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-22 13:31:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 997 transitions. [2021-12-22 13:31:43,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8336120401337793 [2021-12-22 13:31:43,454 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 997 transitions. [2021-12-22 13:31:43,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 997 transitions. [2021-12-22 13:31:43,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:43,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 997 transitions. [2021-12-22 13:31:43,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.6923076923077) internal successors, (997), 13 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,460 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,460 INFO L186 Difference]: Start difference. First operand has 96 places, 77 transitions, 213 flow. Second operand 13 states and 997 transitions. [2021-12-22 13:31:43,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 626 flow [2021-12-22 13:31:43,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 586 flow, removed 12 selfloop flow, removed 4 redundant places. [2021-12-22 13:31:43,468 INFO L242 Difference]: Finished difference. Result has 109 places, 79 transitions, 268 flow [2021-12-22 13:31:43,468 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=268, PETRI_PLACES=109, PETRI_TRANSITIONS=79} [2021-12-22 13:31:43,469 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 25 predicate places. [2021-12-22 13:31:43,469 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 79 transitions, 268 flow [2021-12-22 13:31:43,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.85714285714286) internal successors, (517), 7 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,470 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:43,470 INFO L254 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] [2021-12-22 13:31:43,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:31:43,470 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:43,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1317688226, now seen corresponding path program 1 times [2021-12-22 13:31:43,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:43,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7433872] [2021-12-22 13:31:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:43,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:43,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:43,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7433872] [2021-12-22 13:31:43,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7433872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:43,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:43,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:43,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004469199] [2021-12-22 13:31:43,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:43,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:43,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:43,602 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 92 [2021-12-22 13:31:43,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 79 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 73.85714285714286) internal successors, (517), 7 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:43,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 92 [2021-12-22 13:31:43,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:43,780 INFO L129 PetriNetUnfolder]: 88/407 cut-off events. [2021-12-22 13:31:43,780 INFO L130 PetriNetUnfolder]: For 1032/1105 co-relation queries the response was YES. [2021-12-22 13:31:43,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1198 conditions, 407 events. 88/407 cut-off events. For 1032/1105 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2122 event pairs, 13 based on Foata normal form. 13/412 useless extension candidates. Maximal degree in co-relation 1144. Up to 91 conditions per place. [2021-12-22 13:31:43,783 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 23 selfloop transitions, 8 changer transitions 34/123 dead transitions. [2021-12-22 13:31:43,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 123 transitions, 754 flow [2021-12-22 13:31:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:31:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-22 13:31:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1001 transitions. [2021-12-22 13:31:43,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8369565217391305 [2021-12-22 13:31:43,786 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1001 transitions. [2021-12-22 13:31:43,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1001 transitions. [2021-12-22 13:31:43,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:43,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1001 transitions. [2021-12-22 13:31:43,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,790 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,790 INFO L186 Difference]: Start difference. First operand has 109 places, 79 transitions, 268 flow. Second operand 13 states and 1001 transitions. [2021-12-22 13:31:43,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 123 transitions, 754 flow [2021-12-22 13:31:43,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 123 transitions, 658 flow, removed 36 selfloop flow, removed 8 redundant places. [2021-12-22 13:31:43,795 INFO L242 Difference]: Finished difference. Result has 114 places, 81 transitions, 305 flow [2021-12-22 13:31:43,796 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=305, PETRI_PLACES=114, PETRI_TRANSITIONS=81} [2021-12-22 13:31:43,796 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2021-12-22 13:31:43,797 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 81 transitions, 305 flow [2021-12-22 13:31:43,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.85714285714286) internal successors, (517), 7 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:43,797 INFO L254 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] [2021-12-22 13:31:43,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:31:43,798 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash 505243039, now seen corresponding path program 1 times [2021-12-22 13:31:43,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:43,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013229780] [2021-12-22 13:31:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:43,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:43,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:43,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013229780] [2021-12-22 13:31:43,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013229780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:43,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:43,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:43,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555140933] [2021-12-22 13:31:43,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:43,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:43,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:43,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:43,881 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2021-12-22 13:31:43,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 81 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:43,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:43,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2021-12-22 13:31:43,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:44,124 INFO L129 PetriNetUnfolder]: 123/491 cut-off events. [2021-12-22 13:31:44,125 INFO L130 PetriNetUnfolder]: For 1527/1681 co-relation queries the response was YES. [2021-12-22 13:31:44,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 491 events. 123/491 cut-off events. For 1527/1681 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2610 event pairs, 1 based on Foata normal form. 15/495 useless extension candidates. Maximal degree in co-relation 1453. Up to 78 conditions per place. [2021-12-22 13:31:44,144 INFO L132 encePairwiseOnDemand]: 81/92 looper letters, 37 selfloop transitions, 17 changer transitions 39/149 dead transitions. [2021-12-22 13:31:44,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 149 transitions, 1012 flow [2021-12-22 13:31:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:31:44,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:31:44,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1273 transitions. [2021-12-22 13:31:44,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8139386189258312 [2021-12-22 13:31:44,147 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1273 transitions. [2021-12-22 13:31:44,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1273 transitions. [2021-12-22 13:31:44,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:44,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1273 transitions. [2021-12-22 13:31:44,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 74.88235294117646) internal successors, (1273), 17 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 92.0) internal successors, (1656), 18 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,169 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 92.0) internal successors, (1656), 18 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,169 INFO L186 Difference]: Start difference. First operand has 114 places, 81 transitions, 305 flow. Second operand 17 states and 1273 transitions. [2021-12-22 13:31:44,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 149 transitions, 1012 flow [2021-12-22 13:31:44,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 840 flow, removed 72 selfloop flow, removed 13 redundant places. [2021-12-22 13:31:44,177 INFO L242 Difference]: Finished difference. Result has 124 places, 91 transitions, 465 flow [2021-12-22 13:31:44,177 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=465, PETRI_PLACES=124, PETRI_TRANSITIONS=91} [2021-12-22 13:31:44,179 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 40 predicate places. [2021-12-22 13:31:44,179 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 91 transitions, 465 flow [2021-12-22 13:31:44,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,179 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:44,180 INFO L254 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] [2021-12-22 13:31:44,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:31:44,180 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1542610401, now seen corresponding path program 2 times [2021-12-22 13:31:44,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:44,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098019249] [2021-12-22 13:31:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:44,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:44,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098019249] [2021-12-22 13:31:44,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098019249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:44,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:44,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:44,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990356415] [2021-12-22 13:31:44,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:44,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:44,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:44,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:44,354 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 92 [2021-12-22 13:31:44,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 91 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:44,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 92 [2021-12-22 13:31:44,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:44,522 INFO L129 PetriNetUnfolder]: 60/342 cut-off events. [2021-12-22 13:31:44,522 INFO L130 PetriNetUnfolder]: For 1579/1767 co-relation queries the response was YES. [2021-12-22 13:31:44,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 342 events. 60/342 cut-off events. For 1579/1767 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1629 event pairs, 2 based on Foata normal form. 12/344 useless extension candidates. Maximal degree in co-relation 1120. Up to 55 conditions per place. [2021-12-22 13:31:44,525 INFO L132 encePairwiseOnDemand]: 84/92 looper letters, 30 selfloop transitions, 12 changer transitions 26/127 dead transitions. [2021-12-22 13:31:44,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 127 transitions, 994 flow [2021-12-22 13:31:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:31:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-22 13:31:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 983 transitions. [2021-12-22 13:31:44,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8219063545150501 [2021-12-22 13:31:44,541 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 983 transitions. [2021-12-22 13:31:44,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 983 transitions. [2021-12-22 13:31:44,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:44,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 983 transitions. [2021-12-22 13:31:44,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 75.61538461538461) internal successors, (983), 13 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,546 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,546 INFO L186 Difference]: Start difference. First operand has 124 places, 91 transitions, 465 flow. Second operand 13 states and 983 transitions. [2021-12-22 13:31:44,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 127 transitions, 994 flow [2021-12-22 13:31:44,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 127 transitions, 874 flow, removed 60 selfloop flow, removed 12 redundant places. [2021-12-22 13:31:44,563 INFO L242 Difference]: Finished difference. Result has 124 places, 94 transitions, 551 flow [2021-12-22 13:31:44,563 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=551, PETRI_PLACES=124, PETRI_TRANSITIONS=94} [2021-12-22 13:31:44,565 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 40 predicate places. [2021-12-22 13:31:44,566 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 94 transitions, 551 flow [2021-12-22 13:31:44,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,566 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:44,566 INFO L254 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] [2021-12-22 13:31:44,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:31:44,566 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:44,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2118404949, now seen corresponding path program 1 times [2021-12-22 13:31:44,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:44,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564911055] [2021-12-22 13:31:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:44,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:44,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:44,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564911055] [2021-12-22 13:31:44,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564911055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:44,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:44,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:44,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394635337] [2021-12-22 13:31:44,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:44,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:44,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:44,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:44,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:44,700 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 92 [2021-12-22 13:31:44,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 94 transitions, 551 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:44,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 92 [2021-12-22 13:31:44,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:44,819 INFO L129 PetriNetUnfolder]: 32/245 cut-off events. [2021-12-22 13:31:44,819 INFO L130 PetriNetUnfolder]: For 1087/1618 co-relation queries the response was YES. [2021-12-22 13:31:44,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 245 events. 32/245 cut-off events. For 1087/1618 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1015 event pairs, 0 based on Foata normal form. 6/245 useless extension candidates. Maximal degree in co-relation 807. Up to 49 conditions per place. [2021-12-22 13:31:44,822 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 25 selfloop transitions, 14 changer transitions 12/110 dead transitions. [2021-12-22 13:31:44,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 110 transitions, 787 flow [2021-12-22 13:31:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:31:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:31:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 759 transitions. [2021-12-22 13:31:44,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.825 [2021-12-22 13:31:44,824 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 759 transitions. [2021-12-22 13:31:44,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 759 transitions. [2021-12-22 13:31:44,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:44,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 759 transitions. [2021-12-22 13:31:44,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 75.9) internal successors, (759), 10 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,828 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,843 INFO L186 Difference]: Start difference. First operand has 124 places, 94 transitions, 551 flow. Second operand 10 states and 759 transitions. [2021-12-22 13:31:44,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 110 transitions, 787 flow [2021-12-22 13:31:44,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 110 transitions, 720 flow, removed 31 selfloop flow, removed 7 redundant places. [2021-12-22 13:31:44,848 INFO L242 Difference]: Finished difference. Result has 124 places, 92 transitions, 548 flow [2021-12-22 13:31:44,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=548, PETRI_PLACES=124, PETRI_TRANSITIONS=92} [2021-12-22 13:31:44,850 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 40 predicate places. [2021-12-22 13:31:44,850 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 92 transitions, 548 flow [2021-12-22 13:31:44,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,851 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:44,851 INFO L254 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] [2021-12-22 13:31:44,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:31:44,851 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash 13397974, now seen corresponding path program 1 times [2021-12-22 13:31:44,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:44,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100048541] [2021-12-22 13:31:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:44,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:44,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:44,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100048541] [2021-12-22 13:31:44,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100048541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:44,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:44,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:44,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230298803] [2021-12-22 13:31:44,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:44,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:44,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:44,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-22 13:31:44,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 92 transitions, 548 flow. Second operand has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 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) [2021-12-22 13:31:44,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:44,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-22 13:31:44,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:45,115 INFO L129 PetriNetUnfolder]: 39/332 cut-off events. [2021-12-22 13:31:45,116 INFO L130 PetriNetUnfolder]: For 1437/1977 co-relation queries the response was YES. [2021-12-22 13:31:45,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 332 events. 39/332 cut-off events. For 1437/1977 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1763 event pairs, 2 based on Foata normal form. 10/333 useless extension candidates. Maximal degree in co-relation 996. Up to 48 conditions per place. [2021-12-22 13:31:45,118 INFO L132 encePairwiseOnDemand]: 84/92 looper letters, 12 selfloop transitions, 5 changer transitions 23/108 dead transitions. [2021-12-22 13:31:45,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 108 transitions, 730 flow [2021-12-22 13:31:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:31:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:31:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 780 transitions. [2021-12-22 13:31:45,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8478260869565217 [2021-12-22 13:31:45,120 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 780 transitions. [2021-12-22 13:31:45,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 780 transitions. [2021-12-22 13:31:45,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:45,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 780 transitions. [2021-12-22 13:31:45,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 78.0) internal successors, (780), 10 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,139 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,140 INFO L186 Difference]: Start difference. First operand has 124 places, 92 transitions, 548 flow. Second operand 10 states and 780 transitions. [2021-12-22 13:31:45,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 108 transitions, 730 flow [2021-12-22 13:31:45,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 108 transitions, 658 flow, removed 22 selfloop flow, removed 8 redundant places. [2021-12-22 13:31:45,145 INFO L242 Difference]: Finished difference. Result has 127 places, 82 transitions, 378 flow [2021-12-22 13:31:45,145 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=378, PETRI_PLACES=127, PETRI_TRANSITIONS=82} [2021-12-22 13:31:45,146 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 43 predicate places. [2021-12-22 13:31:45,146 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 82 transitions, 378 flow [2021-12-22 13:31:45,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 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) [2021-12-22 13:31:45,147 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:45,147 INFO L254 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] [2021-12-22 13:31:45,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:31:45,147 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash -13958422, now seen corresponding path program 1 times [2021-12-22 13:31:45,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:45,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719988457] [2021-12-22 13:31:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:45,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:45,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:45,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719988457] [2021-12-22 13:31:45,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719988457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:45,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:45,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:45,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340100863] [2021-12-22 13:31:45,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:45,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:45,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:45,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:45,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:45,261 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-22 13:31:45,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 82 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 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) [2021-12-22 13:31:45,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:45,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-22 13:31:45,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:45,354 INFO L129 PetriNetUnfolder]: 14/180 cut-off events. [2021-12-22 13:31:45,355 INFO L130 PetriNetUnfolder]: For 827/1038 co-relation queries the response was YES. [2021-12-22 13:31:45,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 180 events. 14/180 cut-off events. For 827/1038 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 623 event pairs, 0 based on Foata normal form. 9/184 useless extension candidates. Maximal degree in co-relation 484. Up to 19 conditions per place. [2021-12-22 13:31:45,356 INFO L132 encePairwiseOnDemand]: 84/92 looper letters, 10 selfloop transitions, 4 changer transitions 22/97 dead transitions. [2021-12-22 13:31:45,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 97 transitions, 548 flow [2021-12-22 13:31:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:31:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:31:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 778 transitions. [2021-12-22 13:31:45,358 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8456521739130435 [2021-12-22 13:31:45,358 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 778 transitions. [2021-12-22 13:31:45,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 778 transitions. [2021-12-22 13:31:45,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:45,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 778 transitions. [2021-12-22 13:31:45,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.8) internal successors, (778), 10 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,362 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,362 INFO L186 Difference]: Start difference. First operand has 127 places, 82 transitions, 378 flow. Second operand 10 states and 778 transitions. [2021-12-22 13:31:45,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 97 transitions, 548 flow [2021-12-22 13:31:45,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 97 transitions, 400 flow, removed 45 selfloop flow, removed 22 redundant places. [2021-12-22 13:31:45,374 INFO L242 Difference]: Finished difference. Result has 116 places, 74 transitions, 236 flow [2021-12-22 13:31:45,375 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=236, PETRI_PLACES=116, PETRI_TRANSITIONS=74} [2021-12-22 13:31:45,376 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2021-12-22 13:31:45,377 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 74 transitions, 236 flow [2021-12-22 13:31:45,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 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) [2021-12-22 13:31:45,378 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:45,378 INFO L254 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] [2021-12-22 13:31:45,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:31:45,378 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:45,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1292346336, now seen corresponding path program 1 times [2021-12-22 13:31:45,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:45,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654413194] [2021-12-22 13:31:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:45,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:45,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:45,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654413194] [2021-12-22 13:31:45,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654413194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:45,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:45,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:31:45,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587064714] [2021-12-22 13:31:45,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:45,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:31:45,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:31:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:31:45,481 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-22 13:31:45,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 74 transitions, 236 flow. Second operand has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:45,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-22 13:31:45,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:45,564 INFO L129 PetriNetUnfolder]: 119/364 cut-off events. [2021-12-22 13:31:45,573 INFO L130 PetriNetUnfolder]: For 137/148 co-relation queries the response was YES. [2021-12-22 13:31:45,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 364 events. 119/364 cut-off events. For 137/148 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1812 event pairs, 3 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 685. Up to 86 conditions per place. [2021-12-22 13:31:45,576 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 14 selfloop transitions, 5 changer transitions 27/106 dead transitions. [2021-12-22 13:31:45,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 106 transitions, 396 flow [2021-12-22 13:31:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:31:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:31:45,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 798 transitions. [2021-12-22 13:31:45,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8673913043478261 [2021-12-22 13:31:45,579 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 798 transitions. [2021-12-22 13:31:45,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 798 transitions. [2021-12-22 13:31:45,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:45,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 798 transitions. [2021-12-22 13:31:45,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.8) internal successors, (798), 10 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,584 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,584 INFO L186 Difference]: Start difference. First operand has 116 places, 74 transitions, 236 flow. Second operand 10 states and 798 transitions. [2021-12-22 13:31:45,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 106 transitions, 396 flow [2021-12-22 13:31:45,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 106 transitions, 341 flow, removed 12 selfloop flow, removed 19 redundant places. [2021-12-22 13:31:45,587 INFO L242 Difference]: Finished difference. Result has 106 places, 75 transitions, 229 flow [2021-12-22 13:31:45,587 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=229, PETRI_PLACES=106, PETRI_TRANSITIONS=75} [2021-12-22 13:31:45,587 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2021-12-22 13:31:45,588 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 229 flow [2021-12-22 13:31:45,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,588 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:45,588 INFO L254 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] [2021-12-22 13:31:45,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:31:45,589 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1760643895, now seen corresponding path program 1 times [2021-12-22 13:31:45,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:45,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902422372] [2021-12-22 13:31:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:45,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:45,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:45,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902422372] [2021-12-22 13:31:45,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902422372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:45,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:45,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:45,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922583530] [2021-12-22 13:31:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:45,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:45,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:45,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-22 13:31:45,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:45,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-22 13:31:45,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:45,775 INFO L129 PetriNetUnfolder]: 47/208 cut-off events. [2021-12-22 13:31:45,775 INFO L130 PetriNetUnfolder]: For 273/308 co-relation queries the response was YES. [2021-12-22 13:31:45,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 208 events. 47/208 cut-off events. For 273/308 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 751 event pairs, 0 based on Foata normal form. 9/215 useless extension candidates. Maximal degree in co-relation 576. Up to 69 conditions per place. [2021-12-22 13:31:45,776 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 11 selfloop transitions, 7 changer transitions 25/103 dead transitions. [2021-12-22 13:31:45,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 103 transitions, 504 flow [2021-12-22 13:31:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:31:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:31:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 795 transitions. [2021-12-22 13:31:45,781 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8641304347826086 [2021-12-22 13:31:45,781 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 795 transitions. [2021-12-22 13:31:45,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 795 transitions. [2021-12-22 13:31:45,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:45,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 795 transitions. [2021-12-22 13:31:45,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.5) internal successors, (795), 10 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,783 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,784 INFO L186 Difference]: Start difference. First operand has 106 places, 75 transitions, 229 flow. Second operand 10 states and 795 transitions. [2021-12-22 13:31:45,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 103 transitions, 504 flow [2021-12-22 13:31:45,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 103 transitions, 477 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-12-22 13:31:45,785 INFO L242 Difference]: Finished difference. Result has 109 places, 75 transitions, 251 flow [2021-12-22 13:31:45,786 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=251, PETRI_PLACES=109, PETRI_TRANSITIONS=75} [2021-12-22 13:31:45,786 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 25 predicate places. [2021-12-22 13:31:45,786 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 75 transitions, 251 flow [2021-12-22 13:31:45,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,786 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:45,787 INFO L254 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] [2021-12-22 13:31:45,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:31:45,787 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash -195013454, now seen corresponding path program 1 times [2021-12-22 13:31:45,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:45,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105351939] [2021-12-22 13:31:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:45,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:45,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105351939] [2021-12-22 13:31:45,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105351939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:45,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:45,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:31:45,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560122839] [2021-12-22 13:31:45,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:45,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:31:45,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:45,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:31:45,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:31:45,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-22 13:31:45,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 75 transitions, 251 flow. Second operand has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:45,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-22 13:31:45,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:45,975 INFO L129 PetriNetUnfolder]: 9/111 cut-off events. [2021-12-22 13:31:45,975 INFO L130 PetriNetUnfolder]: For 215/224 co-relation queries the response was YES. [2021-12-22 13:31:45,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 111 events. 9/111 cut-off events. For 215/224 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 239 event pairs, 0 based on Foata normal form. 5/116 useless extension candidates. Maximal degree in co-relation 269. Up to 18 conditions per place. [2021-12-22 13:31:45,976 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 0 selfloop transitions, 0 changer transitions 80/80 dead transitions. [2021-12-22 13:31:45,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 80 transitions, 369 flow [2021-12-22 13:31:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:31:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-22 13:31:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 854 transitions. [2021-12-22 13:31:45,978 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438735177865613 [2021-12-22 13:31:45,978 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 854 transitions. [2021-12-22 13:31:45,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 854 transitions. [2021-12-22 13:31:45,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:45,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 854 transitions. [2021-12-22 13:31:45,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.63636363636364) internal successors, (854), 11 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,982 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,983 INFO L186 Difference]: Start difference. First operand has 109 places, 75 transitions, 251 flow. Second operand 11 states and 854 transitions. [2021-12-22 13:31:45,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 80 transitions, 369 flow [2021-12-22 13:31:45,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 80 transitions, 305 flow, removed 23 selfloop flow, removed 10 redundant places. [2021-12-22 13:31:45,984 INFO L242 Difference]: Finished difference. Result has 98 places, 0 transitions, 0 flow [2021-12-22 13:31:45,985 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=98, PETRI_TRANSITIONS=0} [2021-12-22 13:31:45,985 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 14 predicate places. [2021-12-22 13:31:45,985 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 0 transitions, 0 flow [2021-12-22 13:31:45,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,988 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-22 13:31:45,988 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2021-12-22 13:31:45,988 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2021-12-22 13:31:45,989 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2021-12-22 13:31:45,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:31:45,992 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:45,994 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-22 13:31:45,995 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 13:31:46,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 01:31:46 BasicIcfg [2021-12-22 13:31:46,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 13:31:46,003 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 13:31:46,003 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 13:31:46,003 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 13:31:46,003 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:31:42" (3/4) ... [2021-12-22 13:31:46,005 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 13:31:46,009 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-12-22 13:31:46,010 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-12-22 13:31:46,010 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-12-22 13:31:46,012 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-22 13:31:46,013 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-22 13:31:46,013 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 13:31:46,013 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 13:31:46,032 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 13:31:46,032 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 13:31:46,033 INFO L158 Benchmark]: Toolchain (without parser) took 4630.52ms. Allocated memory was 92.3MB in the beginning and 134.2MB in the end (delta: 41.9MB). Free memory was 59.3MB in the beginning and 87.1MB in the end (delta: -27.7MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2021-12-22 13:31:46,033 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory was 46.9MB in the beginning and 46.8MB in the end (delta: 25.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:31:46,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 407.59ms. Allocated memory is still 92.3MB. Free memory was 59.3MB in the beginning and 59.0MB in the end (delta: 287.4kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 13:31:46,033 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.27ms. Allocated memory is still 92.3MB. Free memory was 59.0MB in the beginning and 56.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:31:46,034 INFO L158 Benchmark]: Boogie Preprocessor took 37.30ms. Allocated memory is still 92.3MB. Free memory was 56.9MB in the beginning and 55.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:31:46,034 INFO L158 Benchmark]: RCFGBuilder took 350.77ms. Allocated memory is still 92.3MB. Free memory was 55.6MB in the beginning and 43.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 13:31:46,034 INFO L158 Benchmark]: TraceAbstraction took 3746.55ms. Allocated memory was 92.3MB in the beginning and 134.2MB in the end (delta: 41.9MB). Free memory was 42.6MB in the beginning and 90.2MB in the end (delta: -47.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:31:46,034 INFO L158 Benchmark]: Witness Printer took 29.72ms. Allocated memory is still 134.2MB. Free memory was 90.2MB in the beginning and 87.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:31:46,035 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory was 46.9MB in the beginning and 46.8MB in the end (delta: 25.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 407.59ms. Allocated memory is still 92.3MB. Free memory was 59.3MB in the beginning and 59.0MB in the end (delta: 287.4kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.27ms. Allocated memory is still 92.3MB. Free memory was 59.0MB in the beginning and 56.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.30ms. Allocated memory is still 92.3MB. Free memory was 56.9MB in the beginning and 55.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 350.77ms. Allocated memory is still 92.3MB. Free memory was 55.6MB in the beginning and 43.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3746.55ms. Allocated memory was 92.3MB in the beginning and 134.2MB in the end (delta: 41.9MB). Free memory was 42.6MB in the beginning and 90.2MB in the end (delta: -47.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 29.72ms. Allocated memory is still 134.2MB. Free memory was 90.2MB in the beginning and 87.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 115 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.6s, OverallIterations: 11, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 410 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 410 mSDsluCounter, 635 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 627 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 619 IncrementalHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 156 mSDtfsCounter, 619 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=551occurred in iteration=5, InterpolantAutomatonStates: 126, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 662 NumberOfCodeBlocks, 662 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 651 ConstructedInterpolants, 0 QuantifiedInterpolants, 2795 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 13:31:46,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE