./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/triangular-1.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 b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:33:57,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:33:57,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:33:57,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:33:57,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:33:57,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:33:57,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:33:57,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:33:57,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:33:57,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:33:57,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:33:57,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:33:57,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:33:57,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:33:57,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:33:57,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:33:57,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:33:57,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:33:57,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:33:57,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:33:57,881 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:33:57,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:33:57,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:33:57,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:33:57,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:33:57,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:33:57,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:33:57,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:33:57,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:33:57,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:33:57,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:33:57,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:33:57,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:33:57,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:33:57,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:33:57,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:33:57,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:33:57,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:33:57,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:33:57,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:33:57,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:33:57,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:33:57,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:33:57,947 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:33:57,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:33:57,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:33:57,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:33:57,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:33:57,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:33:57,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:33:57,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:33:57,950 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:33:57,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:33:57,951 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:33:57,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:33:57,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:33:57,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:33:57,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:33:57,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:33:57,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:33:57,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:33:57,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:33:57,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:33:57,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:33:57,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:33:57,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:33:57,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:33:57,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:33:57,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:33:57,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:33:57,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:33:57,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:33:57,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:33:57,955 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:33:57,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:33:57,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:33:57,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd [2022-07-21 08:33:58,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:33:58,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:33:58,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:33:58,258 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:33:58,259 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:33:58,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-1.i [2022-07-21 08:33:58,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189e742b4/6abd987a255e41a8b312e3d6626d510b/FLAG9e7d8d9eb [2022-07-21 08:33:58,831 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:33:58,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-1.i [2022-07-21 08:33:58,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189e742b4/6abd987a255e41a8b312e3d6626d510b/FLAG9e7d8d9eb [2022-07-21 08:33:59,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189e742b4/6abd987a255e41a8b312e3d6626d510b [2022-07-21 08:33:59,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:33:59,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:33:59,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:33:59,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:33:59,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:33:59,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6c0fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59, skipping insertion in model container [2022-07-21 08:33:59,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:33:59,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:33:59,682 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/triangular-1.i[30950,30963] [2022-07-21 08:33:59,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:33:59,698 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:33:59,743 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/triangular-1.i[30950,30963] [2022-07-21 08:33:59,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:33:59,787 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:33:59,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59 WrapperNode [2022-07-21 08:33:59,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:33:59,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:33:59,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:33:59,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:33:59,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,848 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-07-21 08:33:59,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:33:59,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:33:59,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:33:59,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:33:59,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:33:59,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:33:59,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:33:59,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:33:59,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (1/1) ... [2022-07-21 08:33:59,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:33:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:59,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:33:59,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:33:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-21 08:33:59,968 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-21 08:33:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-21 08:33:59,968 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-21 08:33:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:33:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 08:33:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:33:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:33:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:33:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:33:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 08:33:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:33:59,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:33:59,971 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:34:00,095 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:34:00,097 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:34:00,251 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:34:00,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:34:00,256 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 08:34:00,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:00 BoogieIcfgContainer [2022-07-21 08:34:00,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:34:00,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:34:00,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:34:00,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:34:00,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:33:59" (1/3) ... [2022-07-21 08:34:00,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5067c0f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:34:00, skipping insertion in model container [2022-07-21 08:34:00,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:33:59" (2/3) ... [2022-07-21 08:34:00,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5067c0f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:34:00, skipping insertion in model container [2022-07-21 08:34:00,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:00" (3/3) ... [2022-07-21 08:34:00,271 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2022-07-21 08:34:00,276 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:34:00,283 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:34:00,284 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:34:00,284 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:34:00,332 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:34:00,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-07-21 08:34:00,421 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-21 08:34:00,421 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:34:00,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-07-21 08:34:00,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-07-21 08:34:00,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-07-21 08:34:00,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:34:00,454 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44d78692, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@54e00226 [2022-07-21 08:34:00,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 08:34:00,476 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-07-21 08:34:00,476 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:34:00,476 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:00,477 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:00,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:00,483 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-07-21 08:34:00,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:00,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298271608] [2022-07-21 08:34:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:00,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:00,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:00,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298271608] [2022-07-21 08:34:00,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298271608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:00,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:00,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:34:00,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391022555] [2022-07-21 08:34:00,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:00,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:34:00,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:00,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:34:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:34:00,940 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:00,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:00,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:00,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:00,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:01,132 INFO L129 PetriNetUnfolder]: 42/203 cut-off events. [2022-07-21 08:34:01,133 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:34:01,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 761 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-07-21 08:34:01,141 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-07-21 08:34:01,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-07-21 08:34:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:34:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:34:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-07-21 08:34:01,160 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-07-21 08:34:01,161 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-07-21 08:34:01,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-07-21 08:34:01,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:01,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-07-21 08:34:01,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,181 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,183 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-07-21 08:34:01,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-07-21 08:34:01,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:34:01,195 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-07-21 08:34:01,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-07-21 08:34:01,202 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-07-21 08:34:01,202 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-07-21 08:34:01,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,203 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:01,204 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:01,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:34:01,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:01,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:01,206 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-07-21 08:34:01,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:01,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760283190] [2022-07-21 08:34:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:01,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:01,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:01,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760283190] [2022-07-21 08:34:01,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760283190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:01,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:01,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:34:01,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764003330] [2022-07-21 08:34:01,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:01,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:34:01,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:01,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:34:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:34:01,419 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:01,420 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,420 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:01,420 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:01,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:01,542 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2022-07-21 08:34:01,542 INFO L130 PetriNetUnfolder]: For 115/120 co-relation queries the response was YES. [2022-07-21 08:34:01,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 115/120 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 854 event pairs, 0 based on Foata normal form. 3/206 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2022-07-21 08:34:01,547 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-07-21 08:34:01,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-07-21 08:34:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:34:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:34:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-07-21 08:34:01,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-07-21 08:34:01,549 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-07-21 08:34:01,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-07-21 08:34:01,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:01,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-07-21 08:34:01,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,553 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,553 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-07-21 08:34:01,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-07-21 08:34:01,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:34:01,559 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-07-21 08:34:01,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-07-21 08:34:01,560 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-07-21 08:34:01,561 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-07-21 08:34:01,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,561 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:01,561 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:01,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:34:01,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:01,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-07-21 08:34:01,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:01,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359622510] [2022-07-21 08:34:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:01,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:01,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:01,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359622510] [2022-07-21 08:34:01,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359622510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:01,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:01,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:34:01,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393297371] [2022-07-21 08:34:01,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:01,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:34:01,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:34:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:34:01,656 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:01,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:01,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:01,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:01,738 INFO L129 PetriNetUnfolder]: 37/196 cut-off events. [2022-07-21 08:34:01,739 INFO L130 PetriNetUnfolder]: For 265/276 co-relation queries the response was YES. [2022-07-21 08:34:01,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 265/276 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 654 event pairs, 0 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-07-21 08:34:01,741 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-07-21 08:34:01,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-07-21 08:34:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:34:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:34:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-07-21 08:34:01,743 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-07-21 08:34:01,743 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-07-21 08:34:01,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-07-21 08:34:01,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:01,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-07-21 08:34:01,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,747 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,747 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-07-21 08:34:01,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-07-21 08:34:01,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-07-21 08:34:01,752 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-07-21 08:34:01,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-07-21 08:34:01,753 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-07-21 08:34:01,753 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-07-21 08:34:01,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,753 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:01,754 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:01,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:34:01,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:01,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-07-21 08:34:01,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:01,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796301922] [2022-07-21 08:34:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:01,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:01,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:01,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796301922] [2022-07-21 08:34:01,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796301922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:01,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:01,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:34:01,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561265599] [2022-07-21 08:34:01,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:01,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:34:01,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:34:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:34:01,878 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:01,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:01,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:01,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:01,974 INFO L129 PetriNetUnfolder]: 30/185 cut-off events. [2022-07-21 08:34:01,975 INFO L130 PetriNetUnfolder]: For 253/276 co-relation queries the response was YES. [2022-07-21 08:34:01,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 185 events. 30/185 cut-off events. For 253/276 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 18/186 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2022-07-21 08:34:01,976 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-07-21 08:34:01,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-07-21 08:34:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:34:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:34:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-07-21 08:34:01,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-07-21 08:34:01,979 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-07-21 08:34:01,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-07-21 08:34:01,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:01,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-07-21 08:34:01,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,983 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,983 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-07-21 08:34:01,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-07-21 08:34:01,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-21 08:34:01,987 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-07-21 08:34:01,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-07-21 08:34:01,988 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-07-21 08:34:01,988 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-07-21 08:34:01,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:01,989 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:01,989 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:01,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:34:01,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1461818299, now seen corresponding path program 1 times [2022-07-21 08:34:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:01,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8637048] [2022-07-21 08:34:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:01,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:02,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:02,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8637048] [2022-07-21 08:34:02,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8637048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:02,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:02,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:34:02,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740230647] [2022-07-21 08:34:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:02,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:34:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:34:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:34:02,066 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:02,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:02,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:02,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:02,211 INFO L129 PetriNetUnfolder]: 43/234 cut-off events. [2022-07-21 08:34:02,211 INFO L130 PetriNetUnfolder]: For 621/645 co-relation queries the response was YES. [2022-07-21 08:34:02,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 234 events. 43/234 cut-off events. For 621/645 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 845 event pairs, 1 based on Foata normal form. 17/229 useless extension candidates. Maximal degree in co-relation 535. Up to 50 conditions per place. [2022-07-21 08:34:02,214 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 21 changer transitions 8/97 dead transitions. [2022-07-21 08:34:02,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 660 flow [2022-07-21 08:34:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:34:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 08:34:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-07-21 08:34:02,217 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-07-21 08:34:02,217 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-07-21 08:34:02,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-07-21 08:34:02,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:02,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-07-21 08:34:02,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,221 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,221 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 644 transitions. [2022-07-21 08:34:02,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 660 flow [2022-07-21 08:34:02,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 544 flow, removed 45 selfloop flow, removed 10 redundant places. [2022-07-21 08:34:02,226 INFO L242 Difference]: Finished difference. Result has 97 places, 79 transitions, 417 flow [2022-07-21 08:34:02,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2022-07-21 08:34:02,229 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2022-07-21 08:34:02,229 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 417 flow [2022-07-21 08:34:02,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,229 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:02,229 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:02,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:34:02,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-07-21 08:34:02,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:02,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311086326] [2022-07-21 08:34:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:02,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311086326] [2022-07-21 08:34:02,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311086326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:02,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:02,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:34:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227653101] [2022-07-21 08:34:02,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:02,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:34:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:34:02,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:34:02,340 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:02,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:02,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:02,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:02,473 INFO L129 PetriNetUnfolder]: 36/209 cut-off events. [2022-07-21 08:34:02,474 INFO L130 PetriNetUnfolder]: For 773/809 co-relation queries the response was YES. [2022-07-21 08:34:02,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 209 events. 36/209 cut-off events. For 773/809 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 715 event pairs, 1 based on Foata normal form. 27/217 useless extension candidates. Maximal degree in co-relation 551. Up to 44 conditions per place. [2022-07-21 08:34:02,476 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 21 changer transitions 11/97 dead transitions. [2022-07-21 08:34:02,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 97 transitions, 749 flow [2022-07-21 08:34:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:34:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 08:34:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-07-21 08:34:02,478 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-21 08:34:02,478 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-07-21 08:34:02,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-07-21 08:34:02,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:02,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-07-21 08:34:02,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,483 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,483 INFO L186 Difference]: Start difference. First operand has 97 places, 79 transitions, 417 flow. Second operand 11 states and 638 transitions. [2022-07-21 08:34:02,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 97 transitions, 749 flow [2022-07-21 08:34:02,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 693 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-07-21 08:34:02,489 INFO L242 Difference]: Finished difference. Result has 104 places, 80 transitions, 470 flow [2022-07-21 08:34:02,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=470, PETRI_PLACES=104, PETRI_TRANSITIONS=80} [2022-07-21 08:34:02,489 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-07-21 08:34:02,490 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 80 transitions, 470 flow [2022-07-21 08:34:02,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,490 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:02,490 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:02,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:34:02,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:02,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 3 times [2022-07-21 08:34:02,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:02,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603529213] [2022-07-21 08:34:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:02,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:02,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603529213] [2022-07-21 08:34:02,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603529213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:02,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:02,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:34:02,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269269286] [2022-07-21 08:34:02,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:02,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:34:02,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:34:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:34:02,588 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:02,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 80 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:02,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:02,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:02,691 INFO L129 PetriNetUnfolder]: 37/218 cut-off events. [2022-07-21 08:34:02,691 INFO L130 PetriNetUnfolder]: For 962/999 co-relation queries the response was YES. [2022-07-21 08:34:02,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 218 events. 37/218 cut-off events. For 962/999 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 855 event pairs, 0 based on Foata normal form. 31/229 useless extension candidates. Maximal degree in co-relation 598. Up to 45 conditions per place. [2022-07-21 08:34:02,694 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 28 selfloop transitions, 16 changer transitions 5/94 dead transitions. [2022-07-21 08:34:02,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 94 transitions, 753 flow [2022-07-21 08:34:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:34:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:34:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 526 transitions. [2022-07-21 08:34:02,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.834920634920635 [2022-07-21 08:34:02,696 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 526 transitions. [2022-07-21 08:34:02,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 526 transitions. [2022-07-21 08:34:02,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:02,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 526 transitions. [2022-07-21 08:34:02,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.44444444444444) internal successors, (526), 9 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,699 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,700 INFO L186 Difference]: Start difference. First operand has 104 places, 80 transitions, 470 flow. Second operand 9 states and 526 transitions. [2022-07-21 08:34:02,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 94 transitions, 753 flow [2022-07-21 08:34:02,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 677 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-07-21 08:34:02,706 INFO L242 Difference]: Finished difference. Result has 104 places, 85 transitions, 532 flow [2022-07-21 08:34:02,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=104, PETRI_TRANSITIONS=85} [2022-07-21 08:34:02,707 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-07-21 08:34:02,707 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 85 transitions, 532 flow [2022-07-21 08:34:02,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:02,708 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:02,708 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:02,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:34:02,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1915188887, now seen corresponding path program 1 times [2022-07-21 08:34:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:02,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906979594] [2022-07-21 08:34:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:02,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:02,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:02,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906979594] [2022-07-21 08:34:02,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906979594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:02,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626498094] [2022-07-21 08:34:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:02,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:02,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:02,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:02,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:34:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:34:02,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:03,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:34:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:03,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626498094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:34:03,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:34:03,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-21 08:34:03,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176180928] [2022-07-21 08:34:03,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:34:03,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:34:03,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:03,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:34:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:34:03,156 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:03,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 85 transitions, 532 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:03,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:03,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:03,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:03,455 INFO L129 PetriNetUnfolder]: 55/317 cut-off events. [2022-07-21 08:34:03,455 INFO L130 PetriNetUnfolder]: For 1278/1326 co-relation queries the response was YES. [2022-07-21 08:34:03,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 317 events. 55/317 cut-off events. For 1278/1326 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1281 event pairs, 1 based on Foata normal form. 36/322 useless extension candidates. Maximal degree in co-relation 885. Up to 67 conditions per place. [2022-07-21 08:34:03,460 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 38 changer transitions 14/124 dead transitions. [2022-07-21 08:34:03,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 1220 flow [2022-07-21 08:34:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 08:34:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-21 08:34:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-07-21 08:34:03,463 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-07-21 08:34:03,463 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-07-21 08:34:03,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-07-21 08:34:03,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:03,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-07-21 08:34:03,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:03,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:03,470 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:03,470 INFO L186 Difference]: Start difference. First operand has 104 places, 85 transitions, 532 flow. Second operand 20 states and 1159 transitions. [2022-07-21 08:34:03,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 1220 flow [2022-07-21 08:34:03,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 124 transitions, 1199 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-21 08:34:03,478 INFO L242 Difference]: Finished difference. Result has 128 places, 101 transitions, 879 flow [2022-07-21 08:34:03,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=879, PETRI_PLACES=128, PETRI_TRANSITIONS=101} [2022-07-21 08:34:03,480 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 58 predicate places. [2022-07-21 08:34:03,480 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 879 flow [2022-07-21 08:34:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:03,481 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:03,481 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:03,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:34:03,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:03,696 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2022110288, now seen corresponding path program 1 times [2022-07-21 08:34:03,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:03,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164565552] [2022-07-21 08:34:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:03,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:34:03,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:03,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164565552] [2022-07-21 08:34:03,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164565552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:03,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395667042] [2022-07-21 08:34:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:03,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:03,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:03,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:03,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:34:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 08:34:03,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:34:04,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:34:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:34:04,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395667042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:34:04,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:34:04,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-21 08:34:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593589845] [2022-07-21 08:34:04,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:34:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 08:34:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 08:34:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:34:04,355 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:04,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 101 transitions, 879 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:04,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:04,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:04,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:04,712 INFO L129 PetriNetUnfolder]: 77/442 cut-off events. [2022-07-21 08:34:04,713 INFO L130 PetriNetUnfolder]: For 3503/3581 co-relation queries the response was YES. [2022-07-21 08:34:04,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 442 events. 77/442 cut-off events. For 3503/3581 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1821 event pairs, 0 based on Foata normal form. 37/435 useless extension candidates. Maximal degree in co-relation 1532. Up to 103 conditions per place. [2022-07-21 08:34:04,718 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 27 changer transitions 26/156 dead transitions. [2022-07-21 08:34:04,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 156 transitions, 2115 flow [2022-07-21 08:34:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 08:34:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-21 08:34:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-07-21 08:34:04,723 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-21 08:34:04,724 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-07-21 08:34:04,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-07-21 08:34:04,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:04,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-07-21 08:34:04,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:04,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:04,743 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:04,744 INFO L186 Difference]: Start difference. First operand has 128 places, 101 transitions, 879 flow. Second operand 25 states and 1450 transitions. [2022-07-21 08:34:04,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 156 transitions, 2115 flow [2022-07-21 08:34:04,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 156 transitions, 1698 flow, removed 191 selfloop flow, removed 12 redundant places. [2022-07-21 08:34:04,760 INFO L242 Difference]: Finished difference. Result has 154 places, 115 transitions, 1007 flow [2022-07-21 08:34:04,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1007, PETRI_PLACES=154, PETRI_TRANSITIONS=115} [2022-07-21 08:34:04,761 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2022-07-21 08:34:04,762 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 115 transitions, 1007 flow [2022-07-21 08:34:04,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:04,762 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:04,762 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:04,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:34:04,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-21 08:34:04,980 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2022-07-21 08:34:04,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:04,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957746994] [2022-07-21 08:34:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:34:05,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:05,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957746994] [2022-07-21 08:34:05,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957746994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:05,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369080702] [2022-07-21 08:34:05,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:34:05,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:05,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:05,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:05,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:34:05,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:34:05,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:34:05,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 08:34:05,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:34:05,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:34:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:34:05,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369080702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:34:05,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:34:05,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-21 08:34:05,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913880030] [2022-07-21 08:34:05,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:34:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 08:34:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:05,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 08:34:05,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:34:05,459 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:05,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 115 transitions, 1007 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:05,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:05,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:05,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:06,002 INFO L129 PetriNetUnfolder]: 131/805 cut-off events. [2022-07-21 08:34:06,002 INFO L130 PetriNetUnfolder]: For 14458/14617 co-relation queries the response was YES. [2022-07-21 08:34:06,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 805 events. 131/805 cut-off events. For 14458/14617 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4796 event pairs, 0 based on Foata normal form. 48/771 useless extension candidates. Maximal degree in co-relation 3342. Up to 163 conditions per place. [2022-07-21 08:34:06,014 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 83 changer transitions 26/212 dead transitions. [2022-07-21 08:34:06,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 212 transitions, 3549 flow [2022-07-21 08:34:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 08:34:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 08:34:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2022-07-21 08:34:06,017 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2022-07-21 08:34:06,017 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2022-07-21 08:34:06,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2022-07-21 08:34:06,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:06,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2022-07-21 08:34:06,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:06,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:06,025 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:06,025 INFO L186 Difference]: Start difference. First operand has 154 places, 115 transitions, 1007 flow. Second operand 33 states and 1915 transitions. [2022-07-21 08:34:06,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 212 transitions, 3549 flow [2022-07-21 08:34:06,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 212 transitions, 2974 flow, removed 280 selfloop flow, removed 12 redundant places. [2022-07-21 08:34:06,055 INFO L242 Difference]: Finished difference. Result has 188 places, 158 transitions, 1866 flow [2022-07-21 08:34:06,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1866, PETRI_PLACES=188, PETRI_TRANSITIONS=158} [2022-07-21 08:34:06,056 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 118 predicate places. [2022-07-21 08:34:06,056 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 158 transitions, 1866 flow [2022-07-21 08:34:06,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:06,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:06,057 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:06,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:34:06,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:06,282 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash -518674714, now seen corresponding path program 3 times [2022-07-21 08:34:06,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:06,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981606385] [2022-07-21 08:34:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:06,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:34:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:06,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981606385] [2022-07-21 08:34:06,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981606385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:06,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584484129] [2022-07-21 08:34:06,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:34:06,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:06,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:06,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:06,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:34:06,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 08:34:06,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:34:06,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 08:34:06,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:34:06,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:34:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:34:06,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584484129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:34:06,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:34:06,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-21 08:34:06,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65372014] [2022-07-21 08:34:06,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:34:06,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 08:34:06,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:06,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 08:34:06,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:34:06,664 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:06,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 158 transitions, 1866 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:06,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:06,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:06,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:07,395 INFO L129 PetriNetUnfolder]: 169/1075 cut-off events. [2022-07-21 08:34:07,395 INFO L130 PetriNetUnfolder]: For 36727/36963 co-relation queries the response was YES. [2022-07-21 08:34:07,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5443 conditions, 1075 events. 169/1075 cut-off events. For 36727/36963 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7400 event pairs, 0 based on Foata normal form. 52/1017 useless extension candidates. Maximal degree in co-relation 5347. Up to 215 conditions per place. [2022-07-21 08:34:07,412 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 130 changer transitions 31/268 dead transitions. [2022-07-21 08:34:07,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 268 transitions, 5607 flow [2022-07-21 08:34:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 08:34:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 08:34:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2022-07-21 08:34:07,416 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2022-07-21 08:34:07,416 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2022-07-21 08:34:07,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2022-07-21 08:34:07,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:07,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2022-07-21 08:34:07,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:07,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:07,426 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:07,426 INFO L186 Difference]: Start difference. First operand has 188 places, 158 transitions, 1866 flow. Second operand 36 states and 2085 transitions. [2022-07-21 08:34:07,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 268 transitions, 5607 flow [2022-07-21 08:34:07,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 268 transitions, 4763 flow, removed 403 selfloop flow, removed 18 redundant places. [2022-07-21 08:34:07,525 INFO L242 Difference]: Finished difference. Result has 218 places, 205 transitions, 2891 flow [2022-07-21 08:34:07,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2891, PETRI_PLACES=218, PETRI_TRANSITIONS=205} [2022-07-21 08:34:07,526 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 148 predicate places. [2022-07-21 08:34:07,526 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 205 transitions, 2891 flow [2022-07-21 08:34:07,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:07,527 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:07,527 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:07,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:34:07,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:07,751 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash -390037378, now seen corresponding path program 4 times [2022-07-21 08:34:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:07,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119272145] [2022-07-21 08:34:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:07,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:07,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119272145] [2022-07-21 08:34:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119272145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798364150] [2022-07-21 08:34:07,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 08:34:07,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:07,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:07,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:07,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:34:07,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 08:34:07,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:34:07,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 08:34:07,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:08,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:34:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:08,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798364150] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:34:08,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:34:08,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2022-07-21 08:34:08,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181621741] [2022-07-21 08:34:08,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:34:08,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 08:34:08,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:08,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 08:34:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-07-21 08:34:08,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:08,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 205 transitions, 2891 flow. Second operand has 20 states, 20 states have (on average 56.55) internal successors, (1131), 20 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:08,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:08,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:08,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:08,942 INFO L129 PetriNetUnfolder]: 194/1272 cut-off events. [2022-07-21 08:34:08,942 INFO L130 PetriNetUnfolder]: For 59877/60016 co-relation queries the response was YES. [2022-07-21 08:34:08,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7069 conditions, 1272 events. 194/1272 cut-off events. For 59877/60016 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9360 event pairs, 1 based on Foata normal form. 37/1176 useless extension candidates. Maximal degree in co-relation 6962. Up to 247 conditions per place. [2022-07-21 08:34:08,966 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 96 selfloop transitions, 125 changer transitions 14/280 dead transitions. [2022-07-21 08:34:08,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 280 transitions, 6252 flow [2022-07-21 08:34:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 08:34:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-21 08:34:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1443 transitions. [2022-07-21 08:34:08,968 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8245714285714286 [2022-07-21 08:34:08,968 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1443 transitions. [2022-07-21 08:34:08,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1443 transitions. [2022-07-21 08:34:08,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:08,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1443 transitions. [2022-07-21 08:34:08,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.72) internal successors, (1443), 25 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:08,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:08,974 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:08,974 INFO L186 Difference]: Start difference. First operand has 218 places, 205 transitions, 2891 flow. Second operand 25 states and 1443 transitions. [2022-07-21 08:34:08,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 280 transitions, 6252 flow [2022-07-21 08:34:09,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 280 transitions, 5148 flow, removed 518 selfloop flow, removed 21 redundant places. [2022-07-21 08:34:09,124 INFO L242 Difference]: Finished difference. Result has 227 places, 248 transitions, 3726 flow [2022-07-21 08:34:09,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3726, PETRI_PLACES=227, PETRI_TRANSITIONS=248} [2022-07-21 08:34:09,124 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 157 predicate places. [2022-07-21 08:34:09,125 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 248 transitions, 3726 flow [2022-07-21 08:34:09,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.55) internal successors, (1131), 20 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:09,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:09,125 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:09,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:34:09,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 08:34:09,339 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1871808408, now seen corresponding path program 5 times [2022-07-21 08:34:09,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:09,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585781408] [2022-07-21 08:34:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:09,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:09,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585781408] [2022-07-21 08:34:09,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585781408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:09,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388139042] [2022-07-21 08:34:09,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 08:34:09,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:09,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:09,481 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:09,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:34:09,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 08:34:09,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:34:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 08:34:09,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:09,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:34:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:09,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388139042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:34:09,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:34:09,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-07-21 08:34:09,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053082539] [2022-07-21 08:34:09,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:34:09,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 08:34:09,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:09,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 08:34:09,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-07-21 08:34:09,898 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-21 08:34:09,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 248 transitions, 3726 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:09,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:09,899 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-21 08:34:09,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:10,736 INFO L129 PetriNetUnfolder]: 251/1616 cut-off events. [2022-07-21 08:34:10,736 INFO L130 PetriNetUnfolder]: For 80214/80411 co-relation queries the response was YES. [2022-07-21 08:34:10,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9207 conditions, 1616 events. 251/1616 cut-off events. For 80214/80411 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12647 event pairs, 1 based on Foata normal form. 64/1514 useless extension candidates. Maximal degree in co-relation 9094. Up to 331 conditions per place. [2022-07-21 08:34:10,772 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 71 selfloop transitions, 209 changer transitions 17/342 dead transitions. [2022-07-21 08:34:10,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 342 transitions, 7792 flow [2022-07-21 08:34:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:34:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:34:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1735 transitions. [2022-07-21 08:34:10,775 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8261904761904761 [2022-07-21 08:34:10,775 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1735 transitions. [2022-07-21 08:34:10,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1735 transitions. [2022-07-21 08:34:10,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:10,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1735 transitions. [2022-07-21 08:34:10,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.833333333333336) internal successors, (1735), 30 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:10,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 70.0) internal successors, (2170), 31 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:10,782 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 70.0) internal successors, (2170), 31 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:10,782 INFO L186 Difference]: Start difference. First operand has 227 places, 248 transitions, 3726 flow. Second operand 30 states and 1735 transitions. [2022-07-21 08:34:10,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 342 transitions, 7792 flow [2022-07-21 08:34:10,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 342 transitions, 6640 flow, removed 550 selfloop flow, removed 12 redundant places. [2022-07-21 08:34:10,988 INFO L242 Difference]: Finished difference. Result has 252 places, 309 transitions, 5304 flow [2022-07-21 08:34:10,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5304, PETRI_PLACES=252, PETRI_TRANSITIONS=309} [2022-07-21 08:34:10,989 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 182 predicate places. [2022-07-21 08:34:10,990 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 309 transitions, 5304 flow [2022-07-21 08:34:10,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:10,990 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:10,991 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:11,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:34:11,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:11,207 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash 959354339, now seen corresponding path program 6 times [2022-07-21 08:34:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620992113] [2022-07-21 08:34:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:11,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 75 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 08:34:11,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620992113] [2022-07-21 08:34:11,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620992113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010865939] [2022-07-21 08:34:11,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 08:34:11,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:11,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:11,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:11,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:34:11,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 08:34:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:34:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 08:34:11,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 08:34:11,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:34:11,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010865939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:11,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:34:11,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2022-07-21 08:34:11,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119020871] [2022-07-21 08:34:11,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:34:11,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:34:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-21 08:34:11,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-07-21 08:34:11,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 309 transitions, 5304 flow. Second operand has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 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) [2022-07-21 08:34:11,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:11,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-07-21 08:34:11,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:12,539 INFO L129 PetriNetUnfolder]: 563/3477 cut-off events. [2022-07-21 08:34:12,539 INFO L130 PetriNetUnfolder]: For 80515/80603 co-relation queries the response was YES. [2022-07-21 08:34:12,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14947 conditions, 3477 events. 563/3477 cut-off events. For 80515/80603 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 35651 event pairs, 90 based on Foata normal form. 31/3167 useless extension candidates. Maximal degree in co-relation 14860. Up to 561 conditions per place. [2022-07-21 08:34:12,594 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 24 selfloop transitions, 20 changer transitions 179/325 dead transitions. [2022-07-21 08:34:12,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 325 transitions, 4943 flow [2022-07-21 08:34:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:34:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:34:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1090 transitions. [2022-07-21 08:34:12,596 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8650793650793651 [2022-07-21 08:34:12,597 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1090 transitions. [2022-07-21 08:34:12,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1090 transitions. [2022-07-21 08:34:12,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:12,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1090 transitions. [2022-07-21 08:34:12,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.55555555555556) internal successors, (1090), 18 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:12,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:12,602 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:12,602 INFO L186 Difference]: Start difference. First operand has 252 places, 309 transitions, 5304 flow. Second operand 18 states and 1090 transitions. [2022-07-21 08:34:12,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 325 transitions, 4943 flow [2022-07-21 08:34:12,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 325 transitions, 4074 flow, removed 338 selfloop flow, removed 22 redundant places. [2022-07-21 08:34:12,804 INFO L242 Difference]: Finished difference. Result has 241 places, 126 transitions, 1033 flow [2022-07-21 08:34:12,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1033, PETRI_PLACES=241, PETRI_TRANSITIONS=126} [2022-07-21 08:34:12,805 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 171 predicate places. [2022-07-21 08:34:12,805 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 126 transitions, 1033 flow [2022-07-21 08:34:12,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 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) [2022-07-21 08:34:12,806 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:12,806 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:12,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 08:34:13,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:13,029 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:34:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1656214660, now seen corresponding path program 7 times [2022-07-21 08:34:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267648793] [2022-07-21 08:34:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:13,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 08:34:13,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267648793] [2022-07-21 08:34:13,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267648793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:34:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828587017] [2022-07-21 08:34:13,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 08:34:13,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:34:13,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:13,151 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:34:13,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 08:34:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 08:34:13,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:34:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 08:34:13,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:34:13,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828587017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:13,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:34:13,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2022-07-21 08:34:13,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192214894] [2022-07-21 08:34:13,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:13,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:34:13,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:13,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:34:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-21 08:34:13,294 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-07-21 08:34:13,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 126 transitions, 1033 flow. Second operand has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 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) [2022-07-21 08:34:13,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:13,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-07-21 08:34:13,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:13,668 INFO L129 PetriNetUnfolder]: 273/1534 cut-off events. [2022-07-21 08:34:13,668 INFO L130 PetriNetUnfolder]: For 17166/17226 co-relation queries the response was YES. [2022-07-21 08:34:13,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5369 conditions, 1534 events. 273/1534 cut-off events. For 17166/17226 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13058 event pairs, 24 based on Foata normal form. 38/1481 useless extension candidates. Maximal degree in co-relation 5291. Up to 202 conditions per place. [2022-07-21 08:34:13,693 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 140/140 dead transitions. [2022-07-21 08:34:13,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 140 transitions, 1017 flow [2022-07-21 08:34:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:34:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:34:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1074 transitions. [2022-07-21 08:34:13,702 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8523809523809524 [2022-07-21 08:34:13,702 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1074 transitions. [2022-07-21 08:34:13,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1074 transitions. [2022-07-21 08:34:13,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:13,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1074 transitions. [2022-07-21 08:34:13,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.666666666666664) internal successors, (1074), 18 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:13,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:13,712 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:13,712 INFO L186 Difference]: Start difference. First operand has 241 places, 126 transitions, 1033 flow. Second operand 18 states and 1074 transitions. [2022-07-21 08:34:13,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 140 transitions, 1017 flow [2022-07-21 08:34:13,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 140 transitions, 694 flow, removed 63 selfloop flow, removed 60 redundant places. [2022-07-21 08:34:13,734 INFO L242 Difference]: Finished difference. Result has 157 places, 0 transitions, 0 flow [2022-07-21 08:34:13,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=157, PETRI_TRANSITIONS=0} [2022-07-21 08:34:13,735 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 87 predicate places. [2022-07-21 08:34:13,735 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 0 transitions, 0 flow [2022-07-21 08:34:13,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 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) [2022-07-21 08:34:13,737 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-21 08:34:13,737 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-21 08:34:13,737 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-21 08:34:13,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 08:34:13,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 08:34:13,938 INFO L356 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1] [2022-07-21 08:34:13,941 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-21 08:34:13,941 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 08:34:13,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:34:13 BasicIcfg [2022-07-21 08:34:13,944 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 08:34:13,944 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 08:34:13,945 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 08:34:13,945 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 08:34:13,945 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:00" (3/4) ... [2022-07-21 08:34:13,947 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 08:34:13,953 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2022-07-21 08:34:13,953 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2022-07-21 08:34:13,955 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-07-21 08:34:13,955 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-21 08:34:13,956 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 08:34:13,956 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 08:34:13,985 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 08:34:13,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 08:34:13,986 INFO L158 Benchmark]: Toolchain (without parser) took 14671.71ms. Allocated memory was 50.3MB in the beginning and 350.2MB in the end (delta: 299.9MB). Free memory was 26.3MB in the beginning and 101.2MB in the end (delta: -74.9MB). Peak memory consumption was 226.2MB. Max. memory is 16.1GB. [2022-07-21 08:34:13,986 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 31.8MB in the beginning and 31.7MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 08:34:13,987 INFO L158 Benchmark]: CACSL2BoogieTranslator took 466.54ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 26.1MB in the beginning and 39.0MB in the end (delta: -12.9MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. [2022-07-21 08:34:13,987 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.11ms. Allocated memory is still 60.8MB. Free memory was 39.0MB in the beginning and 37.0MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 08:34:13,987 INFO L158 Benchmark]: Boogie Preprocessor took 46.06ms. Allocated memory is still 60.8MB. Free memory was 37.0MB in the beginning and 35.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 08:34:13,987 INFO L158 Benchmark]: RCFGBuilder took 362.45ms. Allocated memory is still 60.8MB. Free memory was 35.5MB in the beginning and 40.7MB in the end (delta: -5.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-21 08:34:13,988 INFO L158 Benchmark]: TraceAbstraction took 13684.56ms. Allocated memory was 60.8MB in the beginning and 350.2MB in the end (delta: 289.4MB). Free memory was 40.2MB in the beginning and 104.4MB in the end (delta: -64.2MB). Peak memory consumption was 245.2MB. Max. memory is 16.1GB. [2022-07-21 08:34:13,989 INFO L158 Benchmark]: Witness Printer took 41.04ms. Allocated memory is still 350.2MB. Free memory was 104.4MB in the beginning and 101.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-21 08:34:13,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 31.8MB in the beginning and 31.7MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 466.54ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 26.1MB in the beginning and 39.0MB in the end (delta: -12.9MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.11ms. Allocated memory is still 60.8MB. Free memory was 39.0MB in the beginning and 37.0MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.06ms. Allocated memory is still 60.8MB. Free memory was 37.0MB in the beginning and 35.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 362.45ms. Allocated memory is still 60.8MB. Free memory was 35.5MB in the beginning and 40.7MB in the end (delta: -5.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 13684.56ms. Allocated memory was 60.8MB in the beginning and 350.2MB in the end (delta: 289.4MB). Free memory was 40.2MB in the beginning and 104.4MB in the end (delta: -64.2MB). Peak memory consumption was 245.2MB. Max. memory is 16.1GB. * Witness Printer took 41.04ms. Allocated memory is still 350.2MB. Free memory was 104.4MB in the beginning and 101.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: 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 5 procedures, 88 locations, 3 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: 13.6s, OverallIterations: 15, TraceHistogramMax: 6, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 487 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 487 mSDsluCounter, 224 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 320 mSDsCounter, 501 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1597 IncrementalHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 501 mSolverCounterUnsat, 72 mSDtfsCounter, 1597 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1265 GetRequests, 928 SyntacticMatches, 2 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5304occurred in iteration=13, InterpolantAutomatonStates: 272, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 1419 NumberOfCodeBlocks, 1414 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1783 ConstructedInterpolants, 0 QuantifiedInterpolants, 6130 SizeOfPredicates, 62 NumberOfNonLiveVariables, 1376 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 385/959 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! [2022-07-21 08:34:14,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE