./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-sre-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-sre-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c361ebc03d879240d418527d643e8a7b3c7ac084ceb3e66857b21a687a1c7f90 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:01:52,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:01:52,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:01:52,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:01:52,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:01:52,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:01:52,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:01:52,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:01:52,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:01:52,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:01:52,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:01:52,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:01:52,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:01:52,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:01:52,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:01:52,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:01:52,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:01:52,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:01:52,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:01:52,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:01:52,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:01:52,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:01:52,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:01:52,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:01:52,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:01:52,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:01:52,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:01:52,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:01:52,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:01:52,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:01:52,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:01:52,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:01:52,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:01:52,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:01:52,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:01:52,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:01:52,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:01:52,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:01:52,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:01:52,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:01:53,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:01:53,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 03:01:53,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:01:53,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:01:53,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:01:53,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:01:53,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:01:53,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:01:53,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:01:53,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:01:53,033 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:01:53,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:01:53,034 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 03:01:53,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:01:53,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 03:01:53,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:01:53,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:01:53,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:01:53,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:01:53,035 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 03:01:53,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:01:53,036 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:01:53,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:01:53,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:01:53,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:01:53,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:01:53,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:01:53,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:01:53,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:01:53,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:01:53,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:01:53,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:01:53,037 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:01:53,038 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:01:53,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:01:53,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c361ebc03d879240d418527d643e8a7b3c7ac084ceb3e66857b21a687a1c7f90 [2021-12-28 03:01:53,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:01:53,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:01:53,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:01:53,303 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:01:53,304 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:01:53,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-sre-symm.wvr.c [2021-12-28 03:01:53,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14f93b0c/13abec6a17924d8fab1ff857f42ec1aa/FLAGbf16147be [2021-12-28 03:01:53,721 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:01:53,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-sre-symm.wvr.c [2021-12-28 03:01:53,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14f93b0c/13abec6a17924d8fab1ff857f42ec1aa/FLAGbf16147be [2021-12-28 03:01:54,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14f93b0c/13abec6a17924d8fab1ff857f42ec1aa [2021-12-28 03:01:54,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:01:54,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:01:54,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:01:54,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:01:54,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:01:54,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e6a8025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54, skipping insertion in model container [2021-12-28 03:01:54,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:01:54,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:01:54,303 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-sre-symm.wvr.c[2133,2146] [2021-12-28 03:01:54,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:01:54,313 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:01:54,373 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-sre-symm.wvr.c[2133,2146] [2021-12-28 03:01:54,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:01:54,385 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:01:54,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54 WrapperNode [2021-12-28 03:01:54,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:01:54,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:01:54,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:01:54,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:01:54,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,403 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,420 INFO L137 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2021-12-28 03:01:54,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:01:54,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:01:54,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:01:54,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:01:54,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:01:54,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:01:54,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:01:54,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:01:54,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (1/1) ... [2021-12-28 03:01:54,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:01:54,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:01:54,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 03:01:54,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 03:01:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:01:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-28 03:01:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-28 03:01:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-28 03:01:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-28 03:01:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:01:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:01:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:01:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:01:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:01:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:01:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:01:54,526 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 03:01:54,590 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:01:54,592 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:01:54,729 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:01:54,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:01:54,734 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 03:01:54,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:01:54 BoogieIcfgContainer [2021-12-28 03:01:54,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:01:54,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:01:54,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:01:54,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:01:54,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:01:54" (1/3) ... [2021-12-28 03:01:54,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8ff134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:01:54, skipping insertion in model container [2021-12-28 03:01:54,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:01:54" (2/3) ... [2021-12-28 03:01:54,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8ff134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:01:54, skipping insertion in model container [2021-12-28 03:01:54,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:01:54" (3/3) ... [2021-12-28 03:01:54,741 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-sre-symm.wvr.c [2021-12-28 03:01:54,744 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 03:01:54,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:01:54,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:01:54,757 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 03:01:54,805 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,809 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,811 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,812 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,812 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,812 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,816 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,816 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,817 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,820 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,820 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,820 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,820 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,823 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,823 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,830 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,832 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,832 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,832 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:01:54,835 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-28 03:01:54,873 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:01:54,885 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:01:54,885 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-28 03:01:54,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 102 transitions, 220 flow [2021-12-28 03:01:54,955 INFO L129 PetriNetUnfolder]: 7/100 cut-off events. [2021-12-28 03:01:54,955 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:01:54,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 7/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-28 03:01:54,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 102 transitions, 220 flow [2021-12-28 03:01:54,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 194 flow [2021-12-28 03:01:54,998 INFO L129 PetriNetUnfolder]: 7/90 cut-off events. [2021-12-28 03:01:54,998 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:01:54,999 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:55,000 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:55,001 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1122200234, now seen corresponding path program 1 times [2021-12-28 03:01:55,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:55,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822486687] [2021-12-28 03:01:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:55,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:55,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:55,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822486687] [2021-12-28 03:01:55,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822486687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:55,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:55,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:01:55,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701047110] [2021-12-28 03:01:55,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:55,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:01:55,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:55,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:01:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:01:55,365 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 102 [2021-12-28 03:01:55,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:55,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 102 [2021-12-28 03:01:55,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:55,568 INFO L129 PetriNetUnfolder]: 55/294 cut-off events. [2021-12-28 03:01:55,569 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2021-12-28 03:01:55,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 294 events. 55/294 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1134 event pairs, 11 based on Foata normal form. 9/287 useless extension candidates. Maximal degree in co-relation 265. Up to 44 conditions per place. [2021-12-28 03:01:55,573 INFO L132 encePairwiseOnDemand]: 86/102 looper letters, 52 selfloop transitions, 10 changer transitions 34/155 dead transitions. [2021-12-28 03:01:55,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 541 flow [2021-12-28 03:01:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 03:01:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-28 03:01:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1141 transitions. [2021-12-28 03:01:55,589 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7457516339869281 [2021-12-28 03:01:55,590 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1141 transitions. [2021-12-28 03:01:55,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1141 transitions. [2021-12-28 03:01:55,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:55,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1141 transitions. [2021-12-28 03:01:55,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 76.06666666666666) internal successors, (1141), 15 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 102.0) internal successors, (1632), 16 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,611 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 102.0) internal successors, (1632), 16 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,613 INFO L186 Difference]: Start difference. First operand has 91 places, 91 transitions, 194 flow. Second operand 15 states and 1141 transitions. [2021-12-28 03:01:55,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 541 flow [2021-12-28 03:01:55,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 515 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:01:55,621 INFO L242 Difference]: Finished difference. Result has 111 places, 93 transitions, 253 flow [2021-12-28 03:01:55,623 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=253, PETRI_PLACES=111, PETRI_TRANSITIONS=93} [2021-12-28 03:01:55,625 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 20 predicate places. [2021-12-28 03:01:55,626 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 93 transitions, 253 flow [2021-12-28 03:01:55,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,626 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:55,627 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:55,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:01:55,627 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 697994717, now seen corresponding path program 1 times [2021-12-28 03:01:55,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:55,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602230977] [2021-12-28 03:01:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:55,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:55,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:55,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602230977] [2021-12-28 03:01:55,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602230977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:55,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:55,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:01:55,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395371794] [2021-12-28 03:01:55,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:55,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:01:55,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:55,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:01:55,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:01:55,703 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-28 03:01:55,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 93 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:55,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-28 03:01:55,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:55,752 INFO L129 PetriNetUnfolder]: 41/290 cut-off events. [2021-12-28 03:01:55,753 INFO L130 PetriNetUnfolder]: For 107/112 co-relation queries the response was YES. [2021-12-28 03:01:55,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 290 events. 41/290 cut-off events. For 107/112 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1157 event pairs, 13 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 482. Up to 52 conditions per place. [2021-12-28 03:01:55,755 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 18 selfloop transitions, 2 changer transitions 1/98 dead transitions. [2021-12-28 03:01:55,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 98 transitions, 308 flow [2021-12-28 03:01:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:01:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-28 03:01:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-12-28 03:01:55,757 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790849673202614 [2021-12-28 03:01:55,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-12-28 03:01:55,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-12-28 03:01:55,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:55,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-12-28 03:01:55,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,759 INFO L186 Difference]: Start difference. First operand has 111 places, 93 transitions, 253 flow. Second operand 3 states and 269 transitions. [2021-12-28 03:01:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 98 transitions, 308 flow [2021-12-28 03:01:55,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 297 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-12-28 03:01:55,763 INFO L242 Difference]: Finished difference. Result has 100 places, 95 transitions, 262 flow [2021-12-28 03:01:55,763 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2021-12-28 03:01:55,764 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 9 predicate places. [2021-12-28 03:01:55,764 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 262 flow [2021-12-28 03:01:55,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,765 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:55,765 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:55,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:01:55,765 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1049557055, now seen corresponding path program 2 times [2021-12-28 03:01:55,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:55,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254549462] [2021-12-28 03:01:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:55,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:55,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:55,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254549462] [2021-12-28 03:01:55,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254549462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:55,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:55,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:01:55,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040173587] [2021-12-28 03:01:55,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:55,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:01:55,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:55,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:01:55,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:01:55,823 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-28 03:01:55,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:55,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-28 03:01:55,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:55,868 INFO L129 PetriNetUnfolder]: 28/218 cut-off events. [2021-12-28 03:01:55,868 INFO L130 PetriNetUnfolder]: For 59/60 co-relation queries the response was YES. [2021-12-28 03:01:55,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 218 events. 28/218 cut-off events. For 59/60 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 701 event pairs, 16 based on Foata normal form. 3/202 useless extension candidates. Maximal degree in co-relation 313. Up to 46 conditions per place. [2021-12-28 03:01:55,870 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 16 selfloop transitions, 0 changer transitions 13/96 dead transitions. [2021-12-28 03:01:55,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 307 flow [2021-12-28 03:01:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:01:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-28 03:01:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2021-12-28 03:01:55,871 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8790849673202614 [2021-12-28 03:01:55,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2021-12-28 03:01:55,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2021-12-28 03:01:55,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:55,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2021-12-28 03:01:55,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,873 INFO L186 Difference]: Start difference. First operand has 100 places, 95 transitions, 262 flow. Second operand 3 states and 269 transitions. [2021-12-28 03:01:55,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 307 flow [2021-12-28 03:01:55,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 96 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-28 03:01:55,878 INFO L242 Difference]: Finished difference. Result has 101 places, 83 transitions, 202 flow [2021-12-28 03:01:55,878 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2021-12-28 03:01:55,878 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 10 predicate places. [2021-12-28 03:01:55,878 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 202 flow [2021-12-28 03:01:55,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:55,879 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:55,879 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:55,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:01:55,879 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1224331634, now seen corresponding path program 1 times [2021-12-28 03:01:55,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:55,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722210158] [2021-12-28 03:01:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:55,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:56,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722210158] [2021-12-28 03:01:56,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722210158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:56,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:56,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:01:56,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230801531] [2021-12-28 03:01:56,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:56,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:01:56,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:56,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:01:56,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:01:56,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:01:56,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 202 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:56,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:01:56,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:56,377 INFO L129 PetriNetUnfolder]: 96/360 cut-off events. [2021-12-28 03:01:56,377 INFO L130 PetriNetUnfolder]: For 149/150 co-relation queries the response was YES. [2021-12-28 03:01:56,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 360 events. 96/360 cut-off events. For 149/150 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1563 event pairs, 35 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 744. Up to 112 conditions per place. [2021-12-28 03:01:56,379 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 75 selfloop transitions, 5 changer transitions 34/167 dead transitions. [2021-12-28 03:01:56,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 167 transitions, 697 flow [2021-12-28 03:01:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 03:01:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-28 03:01:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1627 transitions. [2021-12-28 03:01:56,383 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6646241830065359 [2021-12-28 03:01:56,383 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1627 transitions. [2021-12-28 03:01:56,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1627 transitions. [2021-12-28 03:01:56,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:56,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1627 transitions. [2021-12-28 03:01:56,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.79166666666667) internal successors, (1627), 24 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,391 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,391 INFO L186 Difference]: Start difference. First operand has 101 places, 83 transitions, 202 flow. Second operand 24 states and 1627 transitions. [2021-12-28 03:01:56,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 167 transitions, 697 flow [2021-12-28 03:01:56,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 643 flow, removed 22 selfloop flow, removed 6 redundant places. [2021-12-28 03:01:56,403 INFO L242 Difference]: Finished difference. Result has 133 places, 87 transitions, 283 flow [2021-12-28 03:01:56,404 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=283, PETRI_PLACES=133, PETRI_TRANSITIONS=87} [2021-12-28 03:01:56,405 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 42 predicate places. [2021-12-28 03:01:56,405 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 87 transitions, 283 flow [2021-12-28 03:01:56,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,407 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:56,407 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:56,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:01:56,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -608647506, now seen corresponding path program 2 times [2021-12-28 03:01:56,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:56,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399321044] [2021-12-28 03:01:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:56,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:56,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:56,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399321044] [2021-12-28 03:01:56,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399321044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:56,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:56,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:01:56,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286636280] [2021-12-28 03:01:56,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:56,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:01:56,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:56,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:01:56,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:01:56,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:01:56,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 87 transitions, 283 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:56,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:01:56,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:56,938 INFO L129 PetriNetUnfolder]: 136/542 cut-off events. [2021-12-28 03:01:56,938 INFO L130 PetriNetUnfolder]: For 1421/1421 co-relation queries the response was YES. [2021-12-28 03:01:56,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1802 conditions, 542 events. 136/542 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2929 event pairs, 70 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 1773. Up to 193 conditions per place. [2021-12-28 03:01:56,943 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 98 selfloop transitions, 5 changer transitions 32/188 dead transitions. [2021-12-28 03:01:56,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 188 transitions, 1218 flow [2021-12-28 03:01:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 03:01:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-28 03:01:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1624 transitions. [2021-12-28 03:01:56,947 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-28 03:01:56,947 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1624 transitions. [2021-12-28 03:01:56,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1624 transitions. [2021-12-28 03:01:56,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:56,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1624 transitions. [2021-12-28 03:01:56,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.66666666666667) internal successors, (1624), 24 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,957 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,957 INFO L186 Difference]: Start difference. First operand has 133 places, 87 transitions, 283 flow. Second operand 24 states and 1624 transitions. [2021-12-28 03:01:56,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 188 transitions, 1218 flow [2021-12-28 03:01:56,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 188 transitions, 1110 flow, removed 51 selfloop flow, removed 11 redundant places. [2021-12-28 03:01:56,966 INFO L242 Difference]: Finished difference. Result has 150 places, 91 transitions, 369 flow [2021-12-28 03:01:56,966 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=369, PETRI_PLACES=150, PETRI_TRANSITIONS=91} [2021-12-28 03:01:56,968 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 59 predicate places. [2021-12-28 03:01:56,968 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 91 transitions, 369 flow [2021-12-28 03:01:56,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:56,969 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:56,969 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:56,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:01:56,969 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:56,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:56,970 INFO L85 PathProgramCache]: Analyzing trace with hash 64807340, now seen corresponding path program 1 times [2021-12-28 03:01:56,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:56,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471048341] [2021-12-28 03:01:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:56,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:57,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:57,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471048341] [2021-12-28 03:01:57,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471048341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:57,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:57,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:01:57,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177437072] [2021-12-28 03:01:57,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:57,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:01:57,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:01:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:01:57,032 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-28 03:01:57,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 91 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:57,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-28 03:01:57,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:57,096 INFO L129 PetriNetUnfolder]: 50/382 cut-off events. [2021-12-28 03:01:57,096 INFO L130 PetriNetUnfolder]: For 1729/1779 co-relation queries the response was YES. [2021-12-28 03:01:57,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 382 events. 50/382 cut-off events. For 1729/1779 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1821 event pairs, 37 based on Foata normal form. 12/368 useless extension candidates. Maximal degree in co-relation 1168. Up to 43 conditions per place. [2021-12-28 03:01:57,103 INFO L132 encePairwiseOnDemand]: 94/102 looper letters, 18 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2021-12-28 03:01:57,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 100 transitions, 445 flow [2021-12-28 03:01:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:01:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-28 03:01:57,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2021-12-28 03:01:57,105 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8676470588235294 [2021-12-28 03:01:57,105 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2021-12-28 03:01:57,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2021-12-28 03:01:57,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:57,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2021-12-28 03:01:57,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,107 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,107 INFO L186 Difference]: Start difference. First operand has 150 places, 91 transitions, 369 flow. Second operand 4 states and 354 transitions. [2021-12-28 03:01:57,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 100 transitions, 445 flow [2021-12-28 03:01:57,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 100 transitions, 418 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-28 03:01:57,114 INFO L242 Difference]: Finished difference. Result has 126 places, 93 transitions, 376 flow [2021-12-28 03:01:57,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=126, PETRI_TRANSITIONS=93} [2021-12-28 03:01:57,116 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 35 predicate places. [2021-12-28 03:01:57,116 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 93 transitions, 376 flow [2021-12-28 03:01:57,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,116 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:57,116 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:57,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:01:57,117 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:57,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:57,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1076099432, now seen corresponding path program 3 times [2021-12-28 03:01:57,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:57,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732984986] [2021-12-28 03:01:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:57,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:57,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732984986] [2021-12-28 03:01:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732984986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:57,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:57,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:01:57,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962437153] [2021-12-28 03:01:57,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:57,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:01:57,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:57,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:01:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:01:57,250 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:01:57,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 93 transitions, 376 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:57,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:01:57,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:57,514 INFO L129 PetriNetUnfolder]: 148/593 cut-off events. [2021-12-28 03:01:57,514 INFO L130 PetriNetUnfolder]: For 2118/2119 co-relation queries the response was YES. [2021-12-28 03:01:57,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 593 events. 148/593 cut-off events. For 2118/2119 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3316 event pairs, 92 based on Foata normal form. 1/581 useless extension candidates. Maximal degree in co-relation 2237. Up to 270 conditions per place. [2021-12-28 03:01:57,523 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 58 selfloop transitions, 12 changer transitions 25/150 dead transitions. [2021-12-28 03:01:57,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 150 transitions, 1101 flow [2021-12-28 03:01:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 03:01:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-28 03:01:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1348 transitions. [2021-12-28 03:01:57,526 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6607843137254902 [2021-12-28 03:01:57,526 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1348 transitions. [2021-12-28 03:01:57,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1348 transitions. [2021-12-28 03:01:57,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:57,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1348 transitions. [2021-12-28 03:01:57,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.4) internal successors, (1348), 20 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,532 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,532 INFO L186 Difference]: Start difference. First operand has 126 places, 93 transitions, 376 flow. Second operand 20 states and 1348 transitions. [2021-12-28 03:01:57,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 150 transitions, 1101 flow [2021-12-28 03:01:57,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 150 transitions, 1095 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-28 03:01:57,540 INFO L242 Difference]: Finished difference. Result has 160 places, 103 transitions, 559 flow [2021-12-28 03:01:57,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=559, PETRI_PLACES=160, PETRI_TRANSITIONS=103} [2021-12-28 03:01:57,540 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 69 predicate places. [2021-12-28 03:01:57,540 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 103 transitions, 559 flow [2021-12-28 03:01:57,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:57,541 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:57,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 03:01:57,541 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:57,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:57,542 INFO L85 PathProgramCache]: Analyzing trace with hash 247999428, now seen corresponding path program 1 times [2021-12-28 03:01:57,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:57,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535507322] [2021-12-28 03:01:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:57,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:57,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:57,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535507322] [2021-12-28 03:01:57,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535507322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:57,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:57,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:01:57,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224807800] [2021-12-28 03:01:57,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:57,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:01:57,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:57,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:01:57,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:01:57,592 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-28 03:01:57,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 103 transitions, 559 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:57,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-28 03:01:57,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:57,663 INFO L129 PetriNetUnfolder]: 61/441 cut-off events. [2021-12-28 03:01:57,663 INFO L130 PetriNetUnfolder]: For 2390/2422 co-relation queries the response was YES. [2021-12-28 03:01:57,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 441 events. 61/441 cut-off events. For 2390/2422 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2352 event pairs, 46 based on Foata normal form. 13/435 useless extension candidates. Maximal degree in co-relation 1577. Up to 53 conditions per place. [2021-12-28 03:01:57,666 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 23 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2021-12-28 03:01:57,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 112 transitions, 644 flow [2021-12-28 03:01:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:01:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-28 03:01:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2021-12-28 03:01:57,668 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8676470588235294 [2021-12-28 03:01:57,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2021-12-28 03:01:57,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2021-12-28 03:01:57,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:57,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2021-12-28 03:01:57,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,670 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,670 INFO L186 Difference]: Start difference. First operand has 160 places, 103 transitions, 559 flow. Second operand 4 states and 354 transitions. [2021-12-28 03:01:57,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 112 transitions, 644 flow [2021-12-28 03:01:57,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 112 transitions, 579 flow, removed 29 selfloop flow, removed 10 redundant places. [2021-12-28 03:01:57,678 INFO L242 Difference]: Finished difference. Result has 143 places, 105 transitions, 520 flow [2021-12-28 03:01:57,679 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=143, PETRI_TRANSITIONS=105} [2021-12-28 03:01:57,679 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 52 predicate places. [2021-12-28 03:01:57,679 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 105 transitions, 520 flow [2021-12-28 03:01:57,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,680 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:57,680 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:57,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 03:01:57,680 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash -4862106, now seen corresponding path program 2 times [2021-12-28 03:01:57,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:57,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628009063] [2021-12-28 03:01:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:57,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:57,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:57,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628009063] [2021-12-28 03:01:57,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628009063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:57,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:57,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:01:57,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306792510] [2021-12-28 03:01:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:57,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:01:57,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:01:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:01:57,726 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-28 03:01:57,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 105 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:57,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-28 03:01:57,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:57,788 INFO L129 PetriNetUnfolder]: 48/375 cut-off events. [2021-12-28 03:01:57,788 INFO L130 PetriNetUnfolder]: For 1504/1531 co-relation queries the response was YES. [2021-12-28 03:01:57,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 375 events. 48/375 cut-off events. For 1504/1531 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1830 event pairs, 32 based on Foata normal form. 12/370 useless extension candidates. Maximal degree in co-relation 1204. Up to 43 conditions per place. [2021-12-28 03:01:57,791 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 23 selfloop transitions, 6 changer transitions 0/114 dead transitions. [2021-12-28 03:01:57,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 114 transitions, 608 flow [2021-12-28 03:01:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:01:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-28 03:01:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2021-12-28 03:01:57,792 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8588235294117647 [2021-12-28 03:01:57,792 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 438 transitions. [2021-12-28 03:01:57,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 438 transitions. [2021-12-28 03:01:57,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:57,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 438 transitions. [2021-12-28 03:01:57,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,794 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,794 INFO L186 Difference]: Start difference. First operand has 143 places, 105 transitions, 520 flow. Second operand 5 states and 438 transitions. [2021-12-28 03:01:57,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 114 transitions, 608 flow [2021-12-28 03:01:57,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 114 transitions, 592 flow, removed 7 selfloop flow, removed 1 redundant places. [2021-12-28 03:01:57,800 INFO L242 Difference]: Finished difference. Result has 148 places, 107 transitions, 536 flow [2021-12-28 03:01:57,801 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=148, PETRI_TRANSITIONS=107} [2021-12-28 03:01:57,801 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 57 predicate places. [2021-12-28 03:01:57,801 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 107 transitions, 536 flow [2021-12-28 03:01:57,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,801 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:57,802 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:57,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 03:01:57,802 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:57,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash -384437336, now seen corresponding path program 1 times [2021-12-28 03:01:57,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:57,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134921666] [2021-12-28 03:01:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:57,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:57,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:57,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134921666] [2021-12-28 03:01:57,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134921666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:57,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:57,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:01:57,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623722744] [2021-12-28 03:01:57,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:57,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:01:57,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:57,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:01:57,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:01:57,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:01:57,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 107 transitions, 536 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:57,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:57,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:01:57,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:58,169 INFO L129 PetriNetUnfolder]: 121/532 cut-off events. [2021-12-28 03:01:58,170 INFO L130 PetriNetUnfolder]: For 2482/2489 co-relation queries the response was YES. [2021-12-28 03:01:58,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 532 events. 121/532 cut-off events. For 2482/2489 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2890 event pairs, 66 based on Foata normal form. 1/525 useless extension candidates. Maximal degree in co-relation 2098. Up to 228 conditions per place. [2021-12-28 03:01:58,174 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 81 selfloop transitions, 5 changer transitions 41/186 dead transitions. [2021-12-28 03:01:58,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 186 transitions, 1365 flow [2021-12-28 03:01:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 03:01:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-28 03:01:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1626 transitions. [2021-12-28 03:01:58,176 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2021-12-28 03:01:58,176 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1626 transitions. [2021-12-28 03:01:58,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1626 transitions. [2021-12-28 03:01:58,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:58,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1626 transitions. [2021-12-28 03:01:58,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.75) internal successors, (1626), 24 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,200 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,200 INFO L186 Difference]: Start difference. First operand has 148 places, 107 transitions, 536 flow. Second operand 24 states and 1626 transitions. [2021-12-28 03:01:58,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 186 transitions, 1365 flow [2021-12-28 03:01:58,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 186 transitions, 1353 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-28 03:01:58,209 INFO L242 Difference]: Finished difference. Result has 187 places, 107 transitions, 575 flow [2021-12-28 03:01:58,210 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=575, PETRI_PLACES=187, PETRI_TRANSITIONS=107} [2021-12-28 03:01:58,210 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 96 predicate places. [2021-12-28 03:01:58,211 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 107 transitions, 575 flow [2021-12-28 03:01:58,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:58,211 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:58,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 03:01:58,211 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1633904260, now seen corresponding path program 2 times [2021-12-28 03:01:58,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:58,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234404417] [2021-12-28 03:01:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:58,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:58,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:58,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234404417] [2021-12-28 03:01:58,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234404417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:58,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:58,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:01:58,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65522004] [2021-12-28 03:01:58,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:58,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:01:58,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:01:58,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:01:58,331 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:01:58,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 107 transitions, 575 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:58,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:01:58,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:58,570 INFO L129 PetriNetUnfolder]: 129/555 cut-off events. [2021-12-28 03:01:58,571 INFO L130 PetriNetUnfolder]: For 4770/4778 co-relation queries the response was YES. [2021-12-28 03:01:58,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2728 conditions, 555 events. 129/555 cut-off events. For 4770/4778 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3027 event pairs, 77 based on Foata normal form. 1/545 useless extension candidates. Maximal degree in co-relation 2666. Up to 268 conditions per place. [2021-12-28 03:01:58,577 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 63 selfloop transitions, 12 changer transitions 29/163 dead transitions. [2021-12-28 03:01:58,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 163 transitions, 1484 flow [2021-12-28 03:01:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 03:01:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-28 03:01:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2021-12-28 03:01:58,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6622549019607843 [2021-12-28 03:01:58,580 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2021-12-28 03:01:58,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2021-12-28 03:01:58,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:58,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2021-12-28 03:01:58,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.55) internal successors, (1351), 20 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,585 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,585 INFO L186 Difference]: Start difference. First operand has 187 places, 107 transitions, 575 flow. Second operand 20 states and 1351 transitions. [2021-12-28 03:01:58,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 163 transitions, 1484 flow [2021-12-28 03:01:58,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 163 transitions, 1212 flow, removed 98 selfloop flow, removed 22 redundant places. [2021-12-28 03:01:58,597 INFO L242 Difference]: Finished difference. Result has 184 places, 117 transitions, 717 flow [2021-12-28 03:01:58,597 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=717, PETRI_PLACES=184, PETRI_TRANSITIONS=117} [2021-12-28 03:01:58,597 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 93 predicate places. [2021-12-28 03:01:58,597 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 117 transitions, 717 flow [2021-12-28 03:01:58,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,598 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:58,598 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:58,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 03:01:58,598 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash 263114164, now seen corresponding path program 2 times [2021-12-28 03:01:58,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:58,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298121756] [2021-12-28 03:01:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:58,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:58,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:58,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298121756] [2021-12-28 03:01:58,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298121756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:58,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:58,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:01:58,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390402075] [2021-12-28 03:01:58,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:58,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:01:58,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:58,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:01:58,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:01:58,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-12-28 03:01:58,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 117 transitions, 717 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:58,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-12-28 03:01:58,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:58,707 INFO L129 PetriNetUnfolder]: 49/346 cut-off events. [2021-12-28 03:01:58,707 INFO L130 PetriNetUnfolder]: For 2048/2055 co-relation queries the response was YES. [2021-12-28 03:01:58,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 346 events. 49/346 cut-off events. For 2048/2055 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1689 event pairs, 29 based on Foata normal form. 6/336 useless extension candidates. Maximal degree in co-relation 1306. Up to 44 conditions per place. [2021-12-28 03:01:58,710 INFO L132 encePairwiseOnDemand]: 95/102 looper letters, 21 selfloop transitions, 8 changer transitions 0/124 dead transitions. [2021-12-28 03:01:58,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 124 transitions, 803 flow [2021-12-28 03:01:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:01:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-28 03:01:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 436 transitions. [2021-12-28 03:01:58,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8549019607843137 [2021-12-28 03:01:58,712 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 436 transitions. [2021-12-28 03:01:58,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 436 transitions. [2021-12-28 03:01:58,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:58,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 436 transitions. [2021-12-28 03:01:58,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,714 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,714 INFO L186 Difference]: Start difference. First operand has 184 places, 117 transitions, 717 flow. Second operand 5 states and 436 transitions. [2021-12-28 03:01:58,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 124 transitions, 803 flow [2021-12-28 03:01:58,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 124 transitions, 688 flow, removed 54 selfloop flow, removed 11 redundant places. [2021-12-28 03:01:58,722 INFO L242 Difference]: Finished difference. Result has 167 places, 119 transitions, 644 flow [2021-12-28 03:01:58,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=644, PETRI_PLACES=167, PETRI_TRANSITIONS=119} [2021-12-28 03:01:58,723 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 76 predicate places. [2021-12-28 03:01:58,723 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 119 transitions, 644 flow [2021-12-28 03:01:58,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:58,724 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:58,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 03:01:58,724 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1922867324, now seen corresponding path program 4 times [2021-12-28 03:01:58,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:58,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213647206] [2021-12-28 03:01:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:58,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:58,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213647206] [2021-12-28 03:01:58,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213647206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:58,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:58,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:01:58,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775671927] [2021-12-28 03:01:58,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:58,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:01:58,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:01:58,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:01:58,812 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:01:58,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 119 transitions, 644 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:58,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:58,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:01:58,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:59,108 INFO L129 PetriNetUnfolder]: 109/470 cut-off events. [2021-12-28 03:01:59,109 INFO L130 PetriNetUnfolder]: For 1903/1914 co-relation queries the response was YES. [2021-12-28 03:01:59,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 470 events. 109/470 cut-off events. For 1903/1914 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2410 event pairs, 59 based on Foata normal form. 1/463 useless extension candidates. Maximal degree in co-relation 1883. Up to 189 conditions per place. [2021-12-28 03:01:59,122 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 72 selfloop transitions, 15 changer transitions 26/174 dead transitions. [2021-12-28 03:01:59,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 174 transitions, 1305 flow [2021-12-28 03:01:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 03:01:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-28 03:01:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1414 transitions. [2021-12-28 03:01:59,126 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6601307189542484 [2021-12-28 03:01:59,126 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1414 transitions. [2021-12-28 03:01:59,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1414 transitions. [2021-12-28 03:01:59,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:59,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1414 transitions. [2021-12-28 03:01:59,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.33333333333333) internal successors, (1414), 21 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,131 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,131 INFO L186 Difference]: Start difference. First operand has 167 places, 119 transitions, 644 flow. Second operand 21 states and 1414 transitions. [2021-12-28 03:01:59,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 174 transitions, 1305 flow [2021-12-28 03:01:59,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 174 transitions, 1281 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-28 03:01:59,140 INFO L242 Difference]: Finished difference. Result has 195 places, 130 transitions, 811 flow [2021-12-28 03:01:59,140 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=811, PETRI_PLACES=195, PETRI_TRANSITIONS=130} [2021-12-28 03:01:59,140 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 104 predicate places. [2021-12-28 03:01:59,141 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 130 transitions, 811 flow [2021-12-28 03:01:59,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,141 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:59,141 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:59,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 03:01:59,142 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:59,142 INFO L85 PathProgramCache]: Analyzing trace with hash 253627028, now seen corresponding path program 3 times [2021-12-28 03:01:59,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:59,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343413356] [2021-12-28 03:01:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:59,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:59,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:59,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343413356] [2021-12-28 03:01:59,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343413356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:59,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:59,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:01:59,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103152085] [2021-12-28 03:01:59,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:59,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:01:59,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:59,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:01:59,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:01:59,232 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:01:59,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 130 transitions, 811 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:59,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:01:59,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:59,508 INFO L129 PetriNetUnfolder]: 111/499 cut-off events. [2021-12-28 03:01:59,508 INFO L130 PetriNetUnfolder]: For 2705/2719 co-relation queries the response was YES. [2021-12-28 03:01:59,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 499 events. 111/499 cut-off events. For 2705/2719 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2670 event pairs, 51 based on Foata normal form. 1/492 useless extension candidates. Maximal degree in co-relation 2198. Up to 213 conditions per place. [2021-12-28 03:01:59,512 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 82 selfloop transitions, 14 changer transitions 32/189 dead transitions. [2021-12-28 03:01:59,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 189 transitions, 1611 flow [2021-12-28 03:01:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 03:01:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-28 03:01:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1355 transitions. [2021-12-28 03:01:59,514 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6642156862745098 [2021-12-28 03:01:59,514 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1355 transitions. [2021-12-28 03:01:59,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1355 transitions. [2021-12-28 03:01:59,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:59,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1355 transitions. [2021-12-28 03:01:59,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.75) internal successors, (1355), 20 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,519 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,519 INFO L186 Difference]: Start difference. First operand has 195 places, 130 transitions, 811 flow. Second operand 20 states and 1355 transitions. [2021-12-28 03:01:59,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 189 transitions, 1611 flow [2021-12-28 03:01:59,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 189 transitions, 1571 flow, removed 20 selfloop flow, removed 10 redundant places. [2021-12-28 03:01:59,530 INFO L242 Difference]: Finished difference. Result has 208 places, 140 transitions, 976 flow [2021-12-28 03:01:59,530 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=976, PETRI_PLACES=208, PETRI_TRANSITIONS=140} [2021-12-28 03:01:59,531 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 117 predicate places. [2021-12-28 03:01:59,531 INFO L470 AbstractCegarLoop]: Abstraction has has 208 places, 140 transitions, 976 flow [2021-12-28 03:01:59,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,531 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:59,532 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:59,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 03:01:59,532 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1761379566, now seen corresponding path program 4 times [2021-12-28 03:01:59,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:59,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950505285] [2021-12-28 03:01:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:59,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:01:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:01:59,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:01:59,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950505285] [2021-12-28 03:01:59,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950505285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:01:59,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:01:59,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:01:59,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537055396] [2021-12-28 03:01:59,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:01:59,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:01:59,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:01:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:01:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:01:59,617 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:01:59,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 140 transitions, 976 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:01:59,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:01:59,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:01:59,895 INFO L129 PetriNetUnfolder]: 108/506 cut-off events. [2021-12-28 03:01:59,895 INFO L130 PetriNetUnfolder]: For 3315/3332 co-relation queries the response was YES. [2021-12-28 03:01:59,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 506 events. 108/506 cut-off events. For 3315/3332 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2794 event pairs, 42 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 2331. Up to 176 conditions per place. [2021-12-28 03:01:59,901 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 103 selfloop transitions, 15 changer transitions 42/221 dead transitions. [2021-12-28 03:01:59,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 221 transitions, 2119 flow [2021-12-28 03:01:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 03:01:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-28 03:01:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1623 transitions. [2021-12-28 03:01:59,903 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6629901960784313 [2021-12-28 03:01:59,903 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1623 transitions. [2021-12-28 03:01:59,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1623 transitions. [2021-12-28 03:01:59,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:01:59,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1623 transitions. [2021-12-28 03:01:59,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 67.625) internal successors, (1623), 24 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,923 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 102.0) internal successors, (2550), 25 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,927 INFO L186 Difference]: Start difference. First operand has 208 places, 140 transitions, 976 flow. Second operand 24 states and 1623 transitions. [2021-12-28 03:01:59,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 221 transitions, 2119 flow [2021-12-28 03:01:59,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 221 transitions, 1791 flow, removed 157 selfloop flow, removed 13 redundant places. [2021-12-28 03:01:59,941 INFO L242 Difference]: Finished difference. Result has 224 places, 140 transitions, 951 flow [2021-12-28 03:01:59,942 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=951, PETRI_PLACES=224, PETRI_TRANSITIONS=140} [2021-12-28 03:01:59,942 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 133 predicate places. [2021-12-28 03:01:59,942 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 140 transitions, 951 flow [2021-12-28 03:01:59,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:01:59,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:01:59,947 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:01:59,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 03:01:59,948 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:01:59,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:01:59,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1592848106, now seen corresponding path program 5 times [2021-12-28 03:01:59,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:01:59,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650238049] [2021-12-28 03:01:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:01:59,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:01:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:00,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:00,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650238049] [2021-12-28 03:02:00,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650238049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:00,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:00,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:00,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820952676] [2021-12-28 03:02:00,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:00,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:00,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:00,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:00,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:00,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 140 transitions, 951 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:00,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:00,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:00,341 INFO L129 PetriNetUnfolder]: 120/557 cut-off events. [2021-12-28 03:02:00,341 INFO L130 PetriNetUnfolder]: For 3132/3144 co-relation queries the response was YES. [2021-12-28 03:02:00,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 557 events. 120/557 cut-off events. For 3132/3144 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3221 event pairs, 50 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 2474. Up to 227 conditions per place. [2021-12-28 03:02:00,347 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 88 selfloop transitions, 23 changer transitions 33/205 dead transitions. [2021-12-28 03:02:00,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 205 transitions, 1908 flow [2021-12-28 03:02:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 03:02:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-28 03:02:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1482 transitions. [2021-12-28 03:02:00,349 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.660427807486631 [2021-12-28 03:02:00,349 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1482 transitions. [2021-12-28 03:02:00,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1482 transitions. [2021-12-28 03:02:00,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:00,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1482 transitions. [2021-12-28 03:02:00,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.36363636363636) internal successors, (1482), 22 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,363 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,363 INFO L186 Difference]: Start difference. First operand has 224 places, 140 transitions, 951 flow. Second operand 22 states and 1482 transitions. [2021-12-28 03:02:00,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 205 transitions, 1908 flow [2021-12-28 03:02:00,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 205 transitions, 1706 flow, removed 40 selfloop flow, removed 23 redundant places. [2021-12-28 03:02:00,377 INFO L242 Difference]: Finished difference. Result has 220 places, 151 transitions, 1076 flow [2021-12-28 03:02:00,377 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1076, PETRI_PLACES=220, PETRI_TRANSITIONS=151} [2021-12-28 03:02:00,377 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 129 predicate places. [2021-12-28 03:02:00,377 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 151 transitions, 1076 flow [2021-12-28 03:02:00,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,377 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:00,378 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:00,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 03:02:00,378 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1895668264, now seen corresponding path program 6 times [2021-12-28 03:02:00,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:00,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816329074] [2021-12-28 03:02:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:00,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:00,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:00,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816329074] [2021-12-28 03:02:00,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816329074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:00,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:00,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:00,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979492218] [2021-12-28 03:02:00,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:00,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:00,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:00,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:00,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:00,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:00,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 151 transitions, 1076 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:00,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:00,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:00,749 INFO L129 PetriNetUnfolder]: 116/530 cut-off events. [2021-12-28 03:02:00,749 INFO L130 PetriNetUnfolder]: For 2946/2966 co-relation queries the response was YES. [2021-12-28 03:02:00,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2429 conditions, 530 events. 116/530 cut-off events. For 2946/2966 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2989 event pairs, 52 based on Foata normal form. 4/527 useless extension candidates. Maximal degree in co-relation 2354. Up to 223 conditions per place. [2021-12-28 03:02:00,755 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 85 selfloop transitions, 23 changer transitions 34/203 dead transitions. [2021-12-28 03:02:00,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 203 transitions, 1920 flow [2021-12-28 03:02:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 03:02:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-28 03:02:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1421 transitions. [2021-12-28 03:02:00,760 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2021-12-28 03:02:00,760 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1421 transitions. [2021-12-28 03:02:00,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1421 transitions. [2021-12-28 03:02:00,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:00,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1421 transitions. [2021-12-28 03:02:00,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.66666666666667) internal successors, (1421), 21 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,778 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,778 INFO L186 Difference]: Start difference. First operand has 220 places, 151 transitions, 1076 flow. Second operand 21 states and 1421 transitions. [2021-12-28 03:02:00,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 203 transitions, 1920 flow [2021-12-28 03:02:00,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 203 transitions, 1768 flow, removed 69 selfloop flow, removed 12 redundant places. [2021-12-28 03:02:00,792 INFO L242 Difference]: Finished difference. Result has 230 places, 155 transitions, 1179 flow [2021-12-28 03:02:00,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1179, PETRI_PLACES=230, PETRI_TRANSITIONS=155} [2021-12-28 03:02:00,792 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 139 predicate places. [2021-12-28 03:02:00,792 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 155 transitions, 1179 flow [2021-12-28 03:02:00,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:00,793 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:00,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 03:02:00,793 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash 676415914, now seen corresponding path program 7 times [2021-12-28 03:02:00,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:00,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400707923] [2021-12-28 03:02:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:00,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:00,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400707923] [2021-12-28 03:02:00,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400707923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:00,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:00,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:00,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068206091] [2021-12-28 03:02:00,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:00,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:00,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:00,881 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:00,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 155 transitions, 1179 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:00,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:00,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:00,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:01,114 INFO L129 PetriNetUnfolder]: 109/514 cut-off events. [2021-12-28 03:02:01,115 INFO L130 PetriNetUnfolder]: For 3038/3064 co-relation queries the response was YES. [2021-12-28 03:02:01,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2394 conditions, 514 events. 109/514 cut-off events. For 3038/3064 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2908 event pairs, 51 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 2314. Up to 233 conditions per place. [2021-12-28 03:02:01,121 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 84 selfloop transitions, 26 changer transitions 27/198 dead transitions. [2021-12-28 03:02:01,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 198 transitions, 1923 flow [2021-12-28 03:02:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 03:02:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-28 03:02:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1088 transitions. [2021-12-28 03:02:01,123 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-12-28 03:02:01,123 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1088 transitions. [2021-12-28 03:02:01,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1088 transitions. [2021-12-28 03:02:01,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:01,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1088 transitions. [2021-12-28 03:02:01,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,127 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,127 INFO L186 Difference]: Start difference. First operand has 230 places, 155 transitions, 1179 flow. Second operand 16 states and 1088 transitions. [2021-12-28 03:02:01,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 198 transitions, 1923 flow [2021-12-28 03:02:01,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 198 transitions, 1769 flow, removed 58 selfloop flow, removed 15 redundant places. [2021-12-28 03:02:01,142 INFO L242 Difference]: Finished difference. Result has 226 places, 160 transitions, 1237 flow [2021-12-28 03:02:01,142 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1237, PETRI_PLACES=226, PETRI_TRANSITIONS=160} [2021-12-28 03:02:01,143 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 135 predicate places. [2021-12-28 03:02:01,143 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 160 transitions, 1237 flow [2021-12-28 03:02:01,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,143 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:01,143 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:01,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 03:02:01,144 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1617779906, now seen corresponding path program 8 times [2021-12-28 03:02:01,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:01,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109754993] [2021-12-28 03:02:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:01,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:01,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109754993] [2021-12-28 03:02:01,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109754993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:01,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:01,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:01,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066285985] [2021-12-28 03:02:01,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:01,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:01,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:01,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:01,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:01,221 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:01,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 160 transitions, 1237 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:01,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:01,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:01,447 INFO L129 PetriNetUnfolder]: 100/495 cut-off events. [2021-12-28 03:02:01,448 INFO L130 PetriNetUnfolder]: For 2413/2435 co-relation queries the response was YES. [2021-12-28 03:02:01,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2186 conditions, 495 events. 100/495 cut-off events. For 2413/2435 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2718 event pairs, 46 based on Foata normal form. 3/492 useless extension candidates. Maximal degree in co-relation 2110. Up to 221 conditions per place. [2021-12-28 03:02:01,452 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 80 selfloop transitions, 14 changer transitions 35/190 dead transitions. [2021-12-28 03:02:01,452 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 190 transitions, 1741 flow [2021-12-28 03:02:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1213 transitions. [2021-12-28 03:02:01,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6606753812636166 [2021-12-28 03:02:01,454 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1213 transitions. [2021-12-28 03:02:01,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1213 transitions. [2021-12-28 03:02:01,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:01,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1213 transitions. [2021-12-28 03:02:01,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.38888888888889) internal successors, (1213), 18 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,458 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,458 INFO L186 Difference]: Start difference. First operand has 226 places, 160 transitions, 1237 flow. Second operand 18 states and 1213 transitions. [2021-12-28 03:02:01,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 190 transitions, 1741 flow [2021-12-28 03:02:01,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 190 transitions, 1617 flow, removed 36 selfloop flow, removed 10 redundant places. [2021-12-28 03:02:01,471 INFO L242 Difference]: Finished difference. Result has 233 places, 145 transitions, 1002 flow [2021-12-28 03:02:01,471 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1002, PETRI_PLACES=233, PETRI_TRANSITIONS=145} [2021-12-28 03:02:01,471 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 142 predicate places. [2021-12-28 03:02:01,472 INFO L470 AbstractCegarLoop]: Abstraction has has 233 places, 145 transitions, 1002 flow [2021-12-28 03:02:01,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,472 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:01,472 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:01,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 03:02:01,472 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1072737310, now seen corresponding path program 9 times [2021-12-28 03:02:01,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:01,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552945255] [2021-12-28 03:02:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:01,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:01,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:01,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552945255] [2021-12-28 03:02:01,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552945255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:01,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:01,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:01,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333742822] [2021-12-28 03:02:01,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:01,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:01,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:01,551 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:01,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 145 transitions, 1002 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:01,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:01,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:01,772 INFO L129 PetriNetUnfolder]: 102/489 cut-off events. [2021-12-28 03:02:01,772 INFO L130 PetriNetUnfolder]: For 2460/2480 co-relation queries the response was YES. [2021-12-28 03:02:01,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 489 events. 102/489 cut-off events. For 2460/2480 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2649 event pairs, 52 based on Foata normal form. 3/484 useless extension candidates. Maximal degree in co-relation 2124. Up to 221 conditions per place. [2021-12-28 03:02:01,777 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 77 selfloop transitions, 22 changer transitions 25/185 dead transitions. [2021-12-28 03:02:01,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 185 transitions, 1679 flow [2021-12-28 03:02:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1219 transitions. [2021-12-28 03:02:01,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6639433551198257 [2021-12-28 03:02:01,779 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1219 transitions. [2021-12-28 03:02:01,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1219 transitions. [2021-12-28 03:02:01,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:01,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1219 transitions. [2021-12-28 03:02:01,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.72222222222223) internal successors, (1219), 18 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,783 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,783 INFO L186 Difference]: Start difference. First operand has 233 places, 145 transitions, 1002 flow. Second operand 18 states and 1219 transitions. [2021-12-28 03:02:01,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 185 transitions, 1679 flow [2021-12-28 03:02:01,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 185 transitions, 1532 flow, removed 27 selfloop flow, removed 18 redundant places. [2021-12-28 03:02:01,795 INFO L242 Difference]: Finished difference. Result has 218 places, 154 transitions, 1123 flow [2021-12-28 03:02:01,795 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1123, PETRI_PLACES=218, PETRI_TRANSITIONS=154} [2021-12-28 03:02:01,796 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 127 predicate places. [2021-12-28 03:02:01,796 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 154 transitions, 1123 flow [2021-12-28 03:02:01,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,796 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:01,796 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:01,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 03:02:01,797 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash 924402576, now seen corresponding path program 10 times [2021-12-28 03:02:01,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:01,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991853481] [2021-12-28 03:02:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:01,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:01,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:01,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991853481] [2021-12-28 03:02:01,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991853481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:01,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:01,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:01,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19747674] [2021-12-28 03:02:01,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:01,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:01,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:01,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:01,875 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:01,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 154 transitions, 1123 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:01,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:01,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:01,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:02,098 INFO L129 PetriNetUnfolder]: 99/491 cut-off events. [2021-12-28 03:02:02,098 INFO L130 PetriNetUnfolder]: For 2137/2157 co-relation queries the response was YES. [2021-12-28 03:02:02,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2133 conditions, 491 events. 99/491 cut-off events. For 2137/2157 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2694 event pairs, 49 based on Foata normal form. 3/487 useless extension candidates. Maximal degree in co-relation 2061. Up to 221 conditions per place. [2021-12-28 03:02:02,102 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 78 selfloop transitions, 24 changer transitions 26/189 dead transitions. [2021-12-28 03:02:02,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 189 transitions, 1734 flow [2021-12-28 03:02:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 03:02:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-28 03:02:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1155 transitions. [2021-12-28 03:02:02,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6660899653979239 [2021-12-28 03:02:02,104 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1155 transitions. [2021-12-28 03:02:02,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1155 transitions. [2021-12-28 03:02:02,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:02,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1155 transitions. [2021-12-28 03:02:02,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.94117647058823) internal successors, (1155), 17 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,107 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,107 INFO L186 Difference]: Start difference. First operand has 218 places, 154 transitions, 1123 flow. Second operand 17 states and 1155 transitions. [2021-12-28 03:02:02,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 189 transitions, 1734 flow [2021-12-28 03:02:02,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 189 transitions, 1649 flow, removed 37 selfloop flow, removed 5 redundant places. [2021-12-28 03:02:02,118 INFO L242 Difference]: Finished difference. Result has 230 places, 158 transitions, 1210 flow [2021-12-28 03:02:02,118 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1210, PETRI_PLACES=230, PETRI_TRANSITIONS=158} [2021-12-28 03:02:02,119 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 139 predicate places. [2021-12-28 03:02:02,119 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 158 transitions, 1210 flow [2021-12-28 03:02:02,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:02,119 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:02,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 03:02:02,120 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:02,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash -291420918, now seen corresponding path program 11 times [2021-12-28 03:02:02,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:02,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535977452] [2021-12-28 03:02:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:02,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:02,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:02,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535977452] [2021-12-28 03:02:02,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535977452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:02,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:02,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:02,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581873373] [2021-12-28 03:02:02,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:02,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:02,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:02,202 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:02,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 158 transitions, 1210 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:02,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:02,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:02,400 INFO L129 PetriNetUnfolder]: 96/491 cut-off events. [2021-12-28 03:02:02,400 INFO L130 PetriNetUnfolder]: For 2180/2196 co-relation queries the response was YES. [2021-12-28 03:02:02,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2118 conditions, 491 events. 96/491 cut-off events. For 2180/2196 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2691 event pairs, 51 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 2040. Up to 221 conditions per place. [2021-12-28 03:02:02,405 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 78 selfloop transitions, 14 changer transitions 34/187 dead transitions. [2021-12-28 03:02:02,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 187 transitions, 1712 flow [2021-12-28 03:02:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 03:02:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-28 03:02:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1154 transitions. [2021-12-28 03:02:02,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6655132641291811 [2021-12-28 03:02:02,407 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1154 transitions. [2021-12-28 03:02:02,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1154 transitions. [2021-12-28 03:02:02,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:02,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1154 transitions. [2021-12-28 03:02:02,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.88235294117646) internal successors, (1154), 17 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,410 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,410 INFO L186 Difference]: Start difference. First operand has 230 places, 158 transitions, 1210 flow. Second operand 17 states and 1154 transitions. [2021-12-28 03:02:02,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 187 transitions, 1712 flow [2021-12-28 03:02:02,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 187 transitions, 1617 flow, removed 26 selfloop flow, removed 8 redundant places. [2021-12-28 03:02:02,423 INFO L242 Difference]: Finished difference. Result has 237 places, 149 transitions, 1058 flow [2021-12-28 03:02:02,424 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1058, PETRI_PLACES=237, PETRI_TRANSITIONS=149} [2021-12-28 03:02:02,424 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 146 predicate places. [2021-12-28 03:02:02,424 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 149 transitions, 1058 flow [2021-12-28 03:02:02,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:02,425 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:02,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 03:02:02,425 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:02,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1407903128, now seen corresponding path program 12 times [2021-12-28 03:02:02,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:02,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667055301] [2021-12-28 03:02:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:02,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:02,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667055301] [2021-12-28 03:02:02,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667055301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:02,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:02,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:02,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99225565] [2021-12-28 03:02:02,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:02,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:02,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:02,504 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:02,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 149 transitions, 1058 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:02,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:02,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:02,713 INFO L129 PetriNetUnfolder]: 86/442 cut-off events. [2021-12-28 03:02:02,714 INFO L130 PetriNetUnfolder]: For 2053/2073 co-relation queries the response was YES. [2021-12-28 03:02:02,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 442 events. 86/442 cut-off events. For 2053/2073 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2273 event pairs, 46 based on Foata normal form. 3/439 useless extension candidates. Maximal degree in co-relation 1806. Up to 208 conditions per place. [2021-12-28 03:02:02,718 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 68 selfloop transitions, 3 changer transitions 37/169 dead transitions. [2021-12-28 03:02:02,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 169 transitions, 1414 flow [2021-12-28 03:02:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1209 transitions. [2021-12-28 03:02:02,719 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6584967320261438 [2021-12-28 03:02:02,719 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1209 transitions. [2021-12-28 03:02:02,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1209 transitions. [2021-12-28 03:02:02,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:02,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1209 transitions. [2021-12-28 03:02:02,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.16666666666667) internal successors, (1209), 18 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,723 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,723 INFO L186 Difference]: Start difference. First operand has 237 places, 149 transitions, 1058 flow. Second operand 18 states and 1209 transitions. [2021-12-28 03:02:02,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 169 transitions, 1414 flow [2021-12-28 03:02:02,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 169 transitions, 1298 flow, removed 27 selfloop flow, removed 21 redundant places. [2021-12-28 03:02:02,733 INFO L242 Difference]: Finished difference. Result has 222 places, 129 transitions, 775 flow [2021-12-28 03:02:02,733 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=775, PETRI_PLACES=222, PETRI_TRANSITIONS=129} [2021-12-28 03:02:02,733 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 131 predicate places. [2021-12-28 03:02:02,734 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 129 transitions, 775 flow [2021-12-28 03:02:02,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,734 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:02,734 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:02,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 03:02:02,734 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash -502599450, now seen corresponding path program 13 times [2021-12-28 03:02:02,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:02,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516171876] [2021-12-28 03:02:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:02,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:02,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516171876] [2021-12-28 03:02:02,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516171876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:02,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:02,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:02,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971634175] [2021-12-28 03:02:02,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:02,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:02,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:02,805 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:02,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 129 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:02,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:02,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:02,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:03,058 INFO L129 PetriNetUnfolder]: 91/461 cut-off events. [2021-12-28 03:02:03,059 INFO L130 PetriNetUnfolder]: For 2005/2016 co-relation queries the response was YES. [2021-12-28 03:02:03,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1902 conditions, 461 events. 91/461 cut-off events. For 2005/2016 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2402 event pairs, 42 based on Foata normal form. 1/458 useless extension candidates. Maximal degree in co-relation 1831. Up to 188 conditions per place. [2021-12-28 03:02:03,063 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 74 selfloop transitions, 19 changer transitions 32/186 dead transitions. [2021-12-28 03:02:03,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 186 transitions, 1578 flow [2021-12-28 03:02:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 03:02:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-28 03:02:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1479 transitions. [2021-12-28 03:02:03,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2021-12-28 03:02:03,065 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1479 transitions. [2021-12-28 03:02:03,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1479 transitions. [2021-12-28 03:02:03,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:03,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1479 transitions. [2021-12-28 03:02:03,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.22727272727273) internal successors, (1479), 22 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,068 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,069 INFO L186 Difference]: Start difference. First operand has 222 places, 129 transitions, 775 flow. Second operand 22 states and 1479 transitions. [2021-12-28 03:02:03,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 186 transitions, 1578 flow [2021-12-28 03:02:03,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 186 transitions, 1367 flow, removed 33 selfloop flow, removed 24 redundant places. [2021-12-28 03:02:03,078 INFO L242 Difference]: Finished difference. Result has 205 places, 140 transitions, 896 flow [2021-12-28 03:02:03,079 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=896, PETRI_PLACES=205, PETRI_TRANSITIONS=140} [2021-12-28 03:02:03,079 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 114 predicate places. [2021-12-28 03:02:03,079 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 140 transitions, 896 flow [2021-12-28 03:02:03,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,079 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:03,079 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:03,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 03:02:03,080 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:03,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1322045660, now seen corresponding path program 14 times [2021-12-28 03:02:03,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:03,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950972727] [2021-12-28 03:02:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:03,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:03,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:03,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950972727] [2021-12-28 03:02:03,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950972727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:03,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:03,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:03,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566034994] [2021-12-28 03:02:03,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:03,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:03,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:03,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:03,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:03,163 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:03,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 140 transitions, 896 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:03,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:03,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:03,433 INFO L129 PetriNetUnfolder]: 88/449 cut-off events. [2021-12-28 03:02:03,433 INFO L130 PetriNetUnfolder]: For 1753/1764 co-relation queries the response was YES. [2021-12-28 03:02:03,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 449 events. 88/449 cut-off events. For 1753/1764 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2325 event pairs, 43 based on Foata normal form. 1/445 useless extension candidates. Maximal degree in co-relation 1810. Up to 186 conditions per place. [2021-12-28 03:02:03,438 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 70 selfloop transitions, 21 changer transitions 32/184 dead transitions. [2021-12-28 03:02:03,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 184 transitions, 1566 flow [2021-12-28 03:02:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 03:02:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-28 03:02:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1413 transitions. [2021-12-28 03:02:03,440 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6596638655462185 [2021-12-28 03:02:03,440 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1413 transitions. [2021-12-28 03:02:03,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1413 transitions. [2021-12-28 03:02:03,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:03,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1413 transitions. [2021-12-28 03:02:03,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.28571428571429) internal successors, (1413), 21 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,444 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,444 INFO L186 Difference]: Start difference. First operand has 205 places, 140 transitions, 896 flow. Second operand 21 states and 1413 transitions. [2021-12-28 03:02:03,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 184 transitions, 1566 flow [2021-12-28 03:02:03,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 184 transitions, 1422 flow, removed 66 selfloop flow, removed 11 redundant places. [2021-12-28 03:02:03,453 INFO L242 Difference]: Finished difference. Result has 214 places, 142 transitions, 959 flow [2021-12-28 03:02:03,453 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=959, PETRI_PLACES=214, PETRI_TRANSITIONS=142} [2021-12-28 03:02:03,454 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 123 predicate places. [2021-12-28 03:02:03,454 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 142 transitions, 959 flow [2021-12-28 03:02:03,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:03,455 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:03,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 03:02:03,455 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:03,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:03,455 INFO L85 PathProgramCache]: Analyzing trace with hash -562411640, now seen corresponding path program 15 times [2021-12-28 03:02:03,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:03,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838119783] [2021-12-28 03:02:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:03,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:03,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:03,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838119783] [2021-12-28 03:02:03,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838119783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:03,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:03,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:03,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265863449] [2021-12-28 03:02:03,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:03,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:03,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:03,537 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:03,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 142 transitions, 959 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:03,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:03,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:03,716 INFO L129 PetriNetUnfolder]: 85/448 cut-off events. [2021-12-28 03:02:03,716 INFO L130 PetriNetUnfolder]: For 1992/2003 co-relation queries the response was YES. [2021-12-28 03:02:03,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 448 events. 85/448 cut-off events. For 1992/2003 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2311 event pairs, 40 based on Foata normal form. 1/444 useless extension candidates. Maximal degree in co-relation 1835. Up to 191 conditions per place. [2021-12-28 03:02:03,721 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 70 selfloop transitions, 22 changer transitions 29/182 dead transitions. [2021-12-28 03:02:03,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 182 transitions, 1569 flow [2021-12-28 03:02:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 03:02:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-28 03:02:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1090 transitions. [2021-12-28 03:02:03,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6678921568627451 [2021-12-28 03:02:03,722 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1090 transitions. [2021-12-28 03:02:03,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1090 transitions. [2021-12-28 03:02:03,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:03,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1090 transitions. [2021-12-28 03:02:03,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 68.125) internal successors, (1090), 16 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) [2021-12-28 03:02:03,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,726 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,726 INFO L186 Difference]: Start difference. First operand has 214 places, 142 transitions, 959 flow. Second operand 16 states and 1090 transitions. [2021-12-28 03:02:03,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 182 transitions, 1569 flow [2021-12-28 03:02:03,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 182 transitions, 1412 flow, removed 53 selfloop flow, removed 18 redundant places. [2021-12-28 03:02:03,739 INFO L242 Difference]: Finished difference. Result has 207 places, 147 transitions, 1000 flow [2021-12-28 03:02:03,739 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1000, PETRI_PLACES=207, PETRI_TRANSITIONS=147} [2021-12-28 03:02:03,740 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 116 predicate places. [2021-12-28 03:02:03,740 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 147 transitions, 1000 flow [2021-12-28 03:02:03,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,740 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:03,741 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:03,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-28 03:02:03,741 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1822556410, now seen corresponding path program 16 times [2021-12-28 03:02:03,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:03,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51099776] [2021-12-28 03:02:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:03,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:03,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:03,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51099776] [2021-12-28 03:02:03,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51099776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:03,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:03,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:03,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951673994] [2021-12-28 03:02:03,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:03,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:03,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:03,823 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:03,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 147 transitions, 1000 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:03,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:03,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:03,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:04,019 INFO L129 PetriNetUnfolder]: 76/414 cut-off events. [2021-12-28 03:02:04,020 INFO L130 PetriNetUnfolder]: For 1533/1544 co-relation queries the response was YES. [2021-12-28 03:02:04,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 414 events. 76/414 cut-off events. For 1533/1544 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2061 event pairs, 40 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1640. Up to 185 conditions per place. [2021-12-28 03:02:04,022 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 66 selfloop transitions, 10 changer transitions 34/171 dead transitions. [2021-12-28 03:02:04,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 171 transitions, 1379 flow [2021-12-28 03:02:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1212 transitions. [2021-12-28 03:02:04,028 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6601307189542484 [2021-12-28 03:02:04,028 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1212 transitions. [2021-12-28 03:02:04,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1212 transitions. [2021-12-28 03:02:04,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:04,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1212 transitions. [2021-12-28 03:02:04,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.33333333333333) internal successors, (1212), 18 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,031 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,031 INFO L186 Difference]: Start difference. First operand has 207 places, 147 transitions, 1000 flow. Second operand 18 states and 1212 transitions. [2021-12-28 03:02:04,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 171 transitions, 1379 flow [2021-12-28 03:02:04,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 171 transitions, 1275 flow, removed 30 selfloop flow, removed 10 redundant places. [2021-12-28 03:02:04,039 INFO L242 Difference]: Finished difference. Result has 214 places, 132 transitions, 800 flow [2021-12-28 03:02:04,039 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=800, PETRI_PLACES=214, PETRI_TRANSITIONS=132} [2021-12-28 03:02:04,040 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 123 predicate places. [2021-12-28 03:02:04,040 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 132 transitions, 800 flow [2021-12-28 03:02:04,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,040 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:04,040 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:04,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-28 03:02:04,040 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:04,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1355553186, now seen corresponding path program 17 times [2021-12-28 03:02:04,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:04,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202643733] [2021-12-28 03:02:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:04,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:04,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202643733] [2021-12-28 03:02:04,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202643733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:04,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:04,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:04,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485713472] [2021-12-28 03:02:04,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:04,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:04,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:04,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:04,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 132 transitions, 800 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:04,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:04,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:04,359 INFO L129 PetriNetUnfolder]: 81/427 cut-off events. [2021-12-28 03:02:04,359 INFO L130 PetriNetUnfolder]: For 1609/1620 co-relation queries the response was YES. [2021-12-28 03:02:04,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 427 events. 81/427 cut-off events. For 1609/1620 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2138 event pairs, 41 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 1672. Up to 185 conditions per place. [2021-12-28 03:02:04,365 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 64 selfloop transitions, 20 changer transitions 27/172 dead transitions. [2021-12-28 03:02:04,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 172 transitions, 1382 flow [2021-12-28 03:02:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1217 transitions. [2021-12-28 03:02:04,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6628540305010894 [2021-12-28 03:02:04,367 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1217 transitions. [2021-12-28 03:02:04,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1217 transitions. [2021-12-28 03:02:04,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:04,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1217 transitions. [2021-12-28 03:02:04,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.61111111111111) internal successors, (1217), 18 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,370 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,370 INFO L186 Difference]: Start difference. First operand has 214 places, 132 transitions, 800 flow. Second operand 18 states and 1217 transitions. [2021-12-28 03:02:04,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 172 transitions, 1382 flow [2021-12-28 03:02:04,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 172 transitions, 1236 flow, removed 25 selfloop flow, removed 18 redundant places. [2021-12-28 03:02:04,378 INFO L242 Difference]: Finished difference. Result has 199 places, 141 transitions, 913 flow [2021-12-28 03:02:04,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=913, PETRI_PLACES=199, PETRI_TRANSITIONS=141} [2021-12-28 03:02:04,381 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 108 predicate places. [2021-12-28 03:02:04,381 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 141 transitions, 913 flow [2021-12-28 03:02:04,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,382 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:04,382 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:04,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-28 03:02:04,382 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -16762456, now seen corresponding path program 18 times [2021-12-28 03:02:04,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:04,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709705360] [2021-12-28 03:02:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:04,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:04,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:04,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709705360] [2021-12-28 03:02:04,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709705360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:04,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:04,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:04,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055407039] [2021-12-28 03:02:04,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:04,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:04,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:04,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:04,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:04,464 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:04,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 141 transitions, 913 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:04,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:04,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:04,666 INFO L129 PetriNetUnfolder]: 77/417 cut-off events. [2021-12-28 03:02:04,667 INFO L130 PetriNetUnfolder]: For 1386/1397 co-relation queries the response was YES. [2021-12-28 03:02:04,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 417 events. 77/417 cut-off events. For 1386/1397 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2081 event pairs, 37 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1617. Up to 185 conditions per place. [2021-12-28 03:02:04,673 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 65 selfloop transitions, 22 changer transitions 28/176 dead transitions. [2021-12-28 03:02:04,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 176 transitions, 1429 flow [2021-12-28 03:02:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 03:02:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-28 03:02:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1153 transitions. [2021-12-28 03:02:04,674 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6649365628604383 [2021-12-28 03:02:04,674 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1153 transitions. [2021-12-28 03:02:04,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1153 transitions. [2021-12-28 03:02:04,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:04,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1153 transitions. [2021-12-28 03:02:04,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.82352941176471) internal successors, (1153), 17 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,678 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,678 INFO L186 Difference]: Start difference. First operand has 199 places, 141 transitions, 913 flow. Second operand 17 states and 1153 transitions. [2021-12-28 03:02:04,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 176 transitions, 1429 flow [2021-12-28 03:02:04,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 176 transitions, 1348 flow, removed 36 selfloop flow, removed 5 redundant places. [2021-12-28 03:02:04,686 INFO L242 Difference]: Finished difference. Result has 211 places, 145 transitions, 995 flow [2021-12-28 03:02:04,686 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=995, PETRI_PLACES=211, PETRI_TRANSITIONS=145} [2021-12-28 03:02:04,688 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 120 predicate places. [2021-12-28 03:02:04,688 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 145 transitions, 995 flow [2021-12-28 03:02:04,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,688 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:04,689 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:04,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-28 03:02:04,689 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1346892406, now seen corresponding path program 19 times [2021-12-28 03:02:04,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:04,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526426938] [2021-12-28 03:02:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:04,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:04,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:04,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526426938] [2021-12-28 03:02:04,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526426938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:04,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:04,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:04,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299366545] [2021-12-28 03:02:04,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:04,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:04,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:04,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:04,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 145 transitions, 995 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:04,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:04,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:04,971 INFO L129 PetriNetUnfolder]: 71/408 cut-off events. [2021-12-28 03:02:04,971 INFO L130 PetriNetUnfolder]: For 1357/1368 co-relation queries the response was YES. [2021-12-28 03:02:04,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1641 conditions, 408 events. 71/408 cut-off events. For 1357/1368 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2030 event pairs, 37 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 1575. Up to 185 conditions per place. [2021-12-28 03:02:04,975 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 63 selfloop transitions, 13 changer transitions 32/169 dead transitions. [2021-12-28 03:02:04,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 169 transitions, 1389 flow [2021-12-28 03:02:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1212 transitions. [2021-12-28 03:02:04,978 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6601307189542484 [2021-12-28 03:02:04,978 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1212 transitions. [2021-12-28 03:02:04,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1212 transitions. [2021-12-28 03:02:04,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:04,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1212 transitions. [2021-12-28 03:02:04,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.33333333333333) internal successors, (1212), 18 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,981 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,981 INFO L186 Difference]: Start difference. First operand has 211 places, 145 transitions, 995 flow. Second operand 18 states and 1212 transitions. [2021-12-28 03:02:04,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 169 transitions, 1389 flow [2021-12-28 03:02:04,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 169 transitions, 1282 flow, removed 33 selfloop flow, removed 8 redundant places. [2021-12-28 03:02:04,992 INFO L242 Difference]: Finished difference. Result has 220 places, 136 transitions, 861 flow [2021-12-28 03:02:04,992 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=861, PETRI_PLACES=220, PETRI_TRANSITIONS=136} [2021-12-28 03:02:04,993 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 129 predicate places. [2021-12-28 03:02:04,994 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 136 transitions, 861 flow [2021-12-28 03:02:04,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:04,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:04,994 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:04,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-28 03:02:04,995 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2017685588, now seen corresponding path program 20 times [2021-12-28 03:02:04,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:04,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792382821] [2021-12-28 03:02:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:04,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:05,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:05,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792382821] [2021-12-28 03:02:05,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792382821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:05,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:05,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:05,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717998071] [2021-12-28 03:02:05,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:05,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:05,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:05,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:05,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:05,082 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:05,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 136 transitions, 861 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:05,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:05,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:05,282 INFO L129 PetriNetUnfolder]: 63/337 cut-off events. [2021-12-28 03:02:05,282 INFO L130 PetriNetUnfolder]: For 1148/1159 co-relation queries the response was YES. [2021-12-28 03:02:05,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 337 events. 63/337 cut-off events. For 1148/1159 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1547 event pairs, 38 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1310. Up to 163 conditions per place. [2021-12-28 03:02:05,286 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 0 changer transitions 46/150 dead transitions. [2021-12-28 03:02:05,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 150 transitions, 1113 flow [2021-12-28 03:02:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 03:02:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-28 03:02:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1139 transitions. [2021-12-28 03:02:05,287 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2021-12-28 03:02:05,287 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1139 transitions. [2021-12-28 03:02:05,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1139 transitions. [2021-12-28 03:02:05,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:05,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1139 transitions. [2021-12-28 03:02:05,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.0) internal successors, (1139), 17 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,291 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,291 INFO L186 Difference]: Start difference. First operand has 220 places, 136 transitions, 861 flow. Second operand 17 states and 1139 transitions. [2021-12-28 03:02:05,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 150 transitions, 1113 flow [2021-12-28 03:02:05,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 150 transitions, 1009 flow, removed 27 selfloop flow, removed 21 redundant places. [2021-12-28 03:02:05,299 INFO L242 Difference]: Finished difference. Result has 201 places, 104 transitions, 529 flow [2021-12-28 03:02:05,299 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=529, PETRI_PLACES=201, PETRI_TRANSITIONS=104} [2021-12-28 03:02:05,300 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 110 predicate places. [2021-12-28 03:02:05,300 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 104 transitions, 529 flow [2021-12-28 03:02:05,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,300 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:05,300 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:05,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-28 03:02:05,301 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1259046234, now seen corresponding path program 5 times [2021-12-28 03:02:05,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:05,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592410540] [2021-12-28 03:02:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:05,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:05,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:05,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592410540] [2021-12-28 03:02:05,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592410540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:05,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:05,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:05,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397727037] [2021-12-28 03:02:05,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:05,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:05,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:05,387 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:05,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 104 transitions, 529 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:05,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:05,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:05,620 INFO L129 PetriNetUnfolder]: 77/354 cut-off events. [2021-12-28 03:02:05,620 INFO L130 PetriNetUnfolder]: For 1203/1205 co-relation queries the response was YES. [2021-12-28 03:02:05,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 354 events. 77/354 cut-off events. For 1203/1205 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1637 event pairs, 30 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 1323. Up to 75 conditions per place. [2021-12-28 03:02:05,623 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 49 selfloop transitions, 25 changer transitions 29/158 dead transitions. [2021-12-28 03:02:05,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 158 transitions, 1158 flow [2021-12-28 03:02:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 03:02:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-28 03:02:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1411 transitions. [2021-12-28 03:02:05,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2021-12-28 03:02:05,625 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1411 transitions. [2021-12-28 03:02:05,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1411 transitions. [2021-12-28 03:02:05,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:05,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1411 transitions. [2021-12-28 03:02:05,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.19047619047619) internal successors, (1411), 21 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,630 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 102.0) internal successors, (2244), 22 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,630 INFO L186 Difference]: Start difference. First operand has 201 places, 104 transitions, 529 flow. Second operand 21 states and 1411 transitions. [2021-12-28 03:02:05,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 158 transitions, 1158 flow [2021-12-28 03:02:05,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 158 transitions, 1131 flow, removed 8 selfloop flow, removed 9 redundant places. [2021-12-28 03:02:05,635 INFO L242 Difference]: Finished difference. Result has 182 places, 114 transitions, 714 flow [2021-12-28 03:02:05,636 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=714, PETRI_PLACES=182, PETRI_TRANSITIONS=114} [2021-12-28 03:02:05,637 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 91 predicate places. [2021-12-28 03:02:05,637 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 114 transitions, 714 flow [2021-12-28 03:02:05,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:05,637 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:05,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-28 03:02:05,638 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2029187440, now seen corresponding path program 6 times [2021-12-28 03:02:05,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:05,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649823604] [2021-12-28 03:02:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:05,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:05,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:05,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649823604] [2021-12-28 03:02:05,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649823604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:05,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:05,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:05,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427193237] [2021-12-28 03:02:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:05,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:05,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:05,718 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:05,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 114 transitions, 714 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:05,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:05,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:05,903 INFO L129 PetriNetUnfolder]: 70/329 cut-off events. [2021-12-28 03:02:05,903 INFO L130 PetriNetUnfolder]: For 2165/2170 co-relation queries the response was YES. [2021-12-28 03:02:05,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 329 events. 70/329 cut-off events. For 2165/2170 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1496 event pairs, 16 based on Foata normal form. 1/327 useless extension candidates. Maximal degree in co-relation 1530. Up to 76 conditions per place. [2021-12-28 03:02:05,907 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 55 selfloop transitions, 30 changer transitions 20/160 dead transitions. [2021-12-28 03:02:05,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 160 transitions, 1445 flow [2021-12-28 03:02:05,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 03:02:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-28 03:02:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1078 transitions. [2021-12-28 03:02:05,909 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6605392156862745 [2021-12-28 03:02:05,909 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1078 transitions. [2021-12-28 03:02:05,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1078 transitions. [2021-12-28 03:02:05,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:05,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1078 transitions. [2021-12-28 03:02:05,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.375) internal successors, (1078), 16 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,915 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,916 INFO L186 Difference]: Start difference. First operand has 182 places, 114 transitions, 714 flow. Second operand 16 states and 1078 transitions. [2021-12-28 03:02:05,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 160 transitions, 1445 flow [2021-12-28 03:02:05,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 160 transitions, 1299 flow, removed 55 selfloop flow, removed 12 redundant places. [2021-12-28 03:02:05,924 INFO L242 Difference]: Finished difference. Result has 183 places, 124 transitions, 869 flow [2021-12-28 03:02:05,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=869, PETRI_PLACES=183, PETRI_TRANSITIONS=124} [2021-12-28 03:02:05,925 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 92 predicate places. [2021-12-28 03:02:05,925 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 124 transitions, 869 flow [2021-12-28 03:02:05,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:05,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:05,926 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:05,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-28 03:02:05,926 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:05,926 INFO L85 PathProgramCache]: Analyzing trace with hash 701916352, now seen corresponding path program 7 times [2021-12-28 03:02:05,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:05,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967044343] [2021-12-28 03:02:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:05,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:06,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:06,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967044343] [2021-12-28 03:02:06,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967044343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:06,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:06,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:06,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715512444] [2021-12-28 03:02:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:06,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:06,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:06,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:06,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:06,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:06,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 124 transitions, 869 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:06,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:06,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:06,298 INFO L129 PetriNetUnfolder]: 74/350 cut-off events. [2021-12-28 03:02:06,298 INFO L130 PetriNetUnfolder]: For 2199/2213 co-relation queries the response was YES. [2021-12-28 03:02:06,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 350 events. 74/350 cut-off events. For 2199/2213 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1704 event pairs, 18 based on Foata normal form. 7/353 useless extension candidates. Maximal degree in co-relation 1633. Up to 74 conditions per place. [2021-12-28 03:02:06,301 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 60 selfloop transitions, 28 changer transitions 34/177 dead transitions. [2021-12-28 03:02:06,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 177 transitions, 1679 flow [2021-12-28 03:02:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 03:02:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-28 03:02:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1472 transitions. [2021-12-28 03:02:06,303 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559714795008913 [2021-12-28 03:02:06,303 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1472 transitions. [2021-12-28 03:02:06,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1472 transitions. [2021-12-28 03:02:06,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:06,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1472 transitions. [2021-12-28 03:02:06,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.9090909090909) internal successors, (1472), 22 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,311 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,311 INFO L186 Difference]: Start difference. First operand has 183 places, 124 transitions, 869 flow. Second operand 22 states and 1472 transitions. [2021-12-28 03:02:06,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 177 transitions, 1679 flow [2021-12-28 03:02:06,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 177 transitions, 1502 flow, removed 62 selfloop flow, removed 7 redundant places. [2021-12-28 03:02:06,320 INFO L242 Difference]: Finished difference. Result has 204 places, 124 transitions, 886 flow [2021-12-28 03:02:06,320 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=886, PETRI_PLACES=204, PETRI_TRANSITIONS=124} [2021-12-28 03:02:06,320 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 113 predicate places. [2021-12-28 03:02:06,320 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 124 transitions, 886 flow [2021-12-28 03:02:06,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,321 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:06,321 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:06,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-28 03:02:06,322 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1764122982, now seen corresponding path program 8 times [2021-12-28 03:02:06,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:06,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682582977] [2021-12-28 03:02:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:06,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:06,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:06,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682582977] [2021-12-28 03:02:06,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682582977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:06,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:06,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:06,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47933695] [2021-12-28 03:02:06,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:06,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:06,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:06,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:06,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:06,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:06,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 124 transitions, 886 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:06,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:06,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:06,605 INFO L129 PetriNetUnfolder]: 61/321 cut-off events. [2021-12-28 03:02:06,605 INFO L130 PetriNetUnfolder]: For 2439/2449 co-relation queries the response was YES. [2021-12-28 03:02:06,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1560 conditions, 321 events. 61/321 cut-off events. For 2439/2449 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1438 event pairs, 16 based on Foata normal form. 4/322 useless extension candidates. Maximal degree in co-relation 1486. Up to 72 conditions per place. [2021-12-28 03:02:06,608 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 51 selfloop transitions, 16 changer transitions 31/153 dead transitions. [2021-12-28 03:02:06,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 153 transitions, 1358 flow [2021-12-28 03:02:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1203 transitions. [2021-12-28 03:02:06,610 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6552287581699346 [2021-12-28 03:02:06,610 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1203 transitions. [2021-12-28 03:02:06,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1203 transitions. [2021-12-28 03:02:06,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:06,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1203 transitions. [2021-12-28 03:02:06,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.83333333333333) internal successors, (1203), 18 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,613 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,613 INFO L186 Difference]: Start difference. First operand has 204 places, 124 transitions, 886 flow. Second operand 18 states and 1203 transitions. [2021-12-28 03:02:06,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 153 transitions, 1358 flow [2021-12-28 03:02:06,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 153 transitions, 1229 flow, removed 46 selfloop flow, removed 15 redundant places. [2021-12-28 03:02:06,642 INFO L242 Difference]: Finished difference. Result has 199 places, 109 transitions, 670 flow [2021-12-28 03:02:06,642 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=670, PETRI_PLACES=199, PETRI_TRANSITIONS=109} [2021-12-28 03:02:06,642 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 108 predicate places. [2021-12-28 03:02:06,642 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 109 transitions, 670 flow [2021-12-28 03:02:06,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,642 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:06,643 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:06,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-28 03:02:06,643 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:06,643 INFO L85 PathProgramCache]: Analyzing trace with hash -133077446, now seen corresponding path program 9 times [2021-12-28 03:02:06,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:06,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577357681] [2021-12-28 03:02:06,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:06,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:06,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:06,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577357681] [2021-12-28 03:02:06,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577357681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:06,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:06,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:06,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832397387] [2021-12-28 03:02:06,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:06,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:06,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:06,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:06,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:06,718 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:06,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 109 transitions, 670 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:06,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:06,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:06,895 INFO L129 PetriNetUnfolder]: 63/319 cut-off events. [2021-12-28 03:02:06,895 INFO L130 PetriNetUnfolder]: For 2193/2199 co-relation queries the response was YES. [2021-12-28 03:02:06,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 319 events. 63/319 cut-off events. For 2193/2199 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1409 event pairs, 29 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 1469. Up to 72 conditions per place. [2021-12-28 03:02:06,898 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 42 selfloop transitions, 26 changer transitions 21/144 dead transitions. [2021-12-28 03:02:06,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 144 transitions, 1252 flow [2021-12-28 03:02:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1209 transitions. [2021-12-28 03:02:06,899 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6584967320261438 [2021-12-28 03:02:06,899 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1209 transitions. [2021-12-28 03:02:06,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1209 transitions. [2021-12-28 03:02:06,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:06,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1209 transitions. [2021-12-28 03:02:06,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.16666666666667) internal successors, (1209), 18 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,902 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,902 INFO L186 Difference]: Start difference. First operand has 199 places, 109 transitions, 670 flow. Second operand 18 states and 1209 transitions. [2021-12-28 03:02:06,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 144 transitions, 1252 flow [2021-12-28 03:02:06,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 144 transitions, 1087 flow, removed 34 selfloop flow, removed 19 redundant places. [2021-12-28 03:02:06,909 INFO L242 Difference]: Finished difference. Result has 183 places, 118 transitions, 778 flow [2021-12-28 03:02:06,910 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=778, PETRI_PLACES=183, PETRI_TRANSITIONS=118} [2021-12-28 03:02:06,910 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 92 predicate places. [2021-12-28 03:02:06,910 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 118 transitions, 778 flow [2021-12-28 03:02:06,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,910 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:06,910 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:06,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-28 03:02:06,910 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:06,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1946541864, now seen corresponding path program 10 times [2021-12-28 03:02:06,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:06,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939398093] [2021-12-28 03:02:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:06,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:06,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:06,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939398093] [2021-12-28 03:02:06,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939398093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:06,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:06,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:06,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297559283] [2021-12-28 03:02:06,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:06,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:06,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:06,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:06,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:06,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:06,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 118 transitions, 778 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:06,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:06,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:06,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:07,158 INFO L129 PetriNetUnfolder]: 60/314 cut-off events. [2021-12-28 03:02:07,158 INFO L130 PetriNetUnfolder]: For 1552/1562 co-relation queries the response was YES. [2021-12-28 03:02:07,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 314 events. 60/314 cut-off events. For 1552/1562 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1413 event pairs, 27 based on Foata normal form. 3/312 useless extension candidates. Maximal degree in co-relation 1357. Up to 72 conditions per place. [2021-12-28 03:02:07,161 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 43 selfloop transitions, 28 changer transitions 22/148 dead transitions. [2021-12-28 03:02:07,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 148 transitions, 1288 flow [2021-12-28 03:02:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 03:02:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-28 03:02:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1145 transitions. [2021-12-28 03:02:07,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.660322952710496 [2021-12-28 03:02:07,162 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1145 transitions. [2021-12-28 03:02:07,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1145 transitions. [2021-12-28 03:02:07,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:07,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1145 transitions. [2021-12-28 03:02:07,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.3529411764706) internal successors, (1145), 17 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,165 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,165 INFO L186 Difference]: Start difference. First operand has 183 places, 118 transitions, 778 flow. Second operand 17 states and 1145 transitions. [2021-12-28 03:02:07,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 148 transitions, 1288 flow [2021-12-28 03:02:07,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 148 transitions, 1215 flow, removed 29 selfloop flow, removed 5 redundant places. [2021-12-28 03:02:07,173 INFO L242 Difference]: Finished difference. Result has 195 places, 122 transitions, 874 flow [2021-12-28 03:02:07,173 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=874, PETRI_PLACES=195, PETRI_TRANSITIONS=122} [2021-12-28 03:02:07,173 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 104 predicate places. [2021-12-28 03:02:07,173 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 122 transitions, 874 flow [2021-12-28 03:02:07,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,173 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:07,173 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:07,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-28 03:02:07,174 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:07,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1910426902, now seen corresponding path program 11 times [2021-12-28 03:02:07,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:07,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931573562] [2021-12-28 03:02:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:07,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:07,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:07,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931573562] [2021-12-28 03:02:07,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931573562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:07,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:07,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:07,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104483783] [2021-12-28 03:02:07,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:07,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:07,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:07,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:07,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:07,247 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:07,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 122 transitions, 874 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:07,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:07,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:07,422 INFO L129 PetriNetUnfolder]: 57/314 cut-off events. [2021-12-28 03:02:07,422 INFO L130 PetriNetUnfolder]: For 1704/1710 co-relation queries the response was YES. [2021-12-28 03:02:07,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 314 events. 57/314 cut-off events. For 1704/1710 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1402 event pairs, 29 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 1350. Up to 72 conditions per place. [2021-12-28 03:02:07,424 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 43 selfloop transitions, 18 changer transitions 30/146 dead transitions. [2021-12-28 03:02:07,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 146 transitions, 1284 flow [2021-12-28 03:02:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 03:02:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-28 03:02:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1144 transitions. [2021-12-28 03:02:07,428 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6597462514417531 [2021-12-28 03:02:07,428 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1144 transitions. [2021-12-28 03:02:07,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1144 transitions. [2021-12-28 03:02:07,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:07,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1144 transitions. [2021-12-28 03:02:07,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.29411764705883) internal successors, (1144), 17 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,431 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,431 INFO L186 Difference]: Start difference. First operand has 195 places, 122 transitions, 874 flow. Second operand 17 states and 1144 transitions. [2021-12-28 03:02:07,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 146 transitions, 1284 flow [2021-12-28 03:02:07,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 146 transitions, 1193 flow, removed 22 selfloop flow, removed 8 redundant places. [2021-12-28 03:02:07,438 INFO L242 Difference]: Finished difference. Result has 202 places, 113 transitions, 733 flow [2021-12-28 03:02:07,438 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=733, PETRI_PLACES=202, PETRI_TRANSITIONS=113} [2021-12-28 03:02:07,439 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 111 predicate places. [2021-12-28 03:02:07,439 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 113 transitions, 733 flow [2021-12-28 03:02:07,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,439 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:07,440 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:07,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-28 03:02:07,440 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:07,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1117603654, now seen corresponding path program 12 times [2021-12-28 03:02:07,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:07,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9658801] [2021-12-28 03:02:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:07,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:07,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:07,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9658801] [2021-12-28 03:02:07,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9658801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:07,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:07,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:07,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530402989] [2021-12-28 03:02:07,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:07,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:07,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:07,543 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:07,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 113 transitions, 733 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:07,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:07,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:07,746 INFO L129 PetriNetUnfolder]: 47/269 cut-off events. [2021-12-28 03:02:07,747 INFO L130 PetriNetUnfolder]: For 1539/1549 co-relation queries the response was YES. [2021-12-28 03:02:07,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 269 events. 47/269 cut-off events. For 1539/1549 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1051 event pairs, 23 based on Foata normal form. 3/269 useless extension candidates. Maximal degree in co-relation 1109. Up to 66 conditions per place. [2021-12-28 03:02:07,749 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 33 selfloop transitions, 7 changer transitions 33/128 dead transitions. [2021-12-28 03:02:07,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 128 transitions, 997 flow [2021-12-28 03:02:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1199 transitions. [2021-12-28 03:02:07,750 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6530501089324618 [2021-12-28 03:02:07,750 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1199 transitions. [2021-12-28 03:02:07,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1199 transitions. [2021-12-28 03:02:07,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:07,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1199 transitions. [2021-12-28 03:02:07,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.61111111111111) internal successors, (1199), 18 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,753 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,753 INFO L186 Difference]: Start difference. First operand has 202 places, 113 transitions, 733 flow. Second operand 18 states and 1199 transitions. [2021-12-28 03:02:07,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 128 transitions, 997 flow [2021-12-28 03:02:07,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 128 transitions, 873 flow, removed 25 selfloop flow, removed 21 redundant places. [2021-12-28 03:02:07,760 INFO L242 Difference]: Finished difference. Result has 187 places, 93 transitions, 442 flow [2021-12-28 03:02:07,760 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=442, PETRI_PLACES=187, PETRI_TRANSITIONS=93} [2021-12-28 03:02:07,761 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 96 predicate places. [2021-12-28 03:02:07,761 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 93 transitions, 442 flow [2021-12-28 03:02:07,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,761 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:07,762 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:07,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-28 03:02:07,762 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash -642037244, now seen corresponding path program 13 times [2021-12-28 03:02:07,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:07,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117546464] [2021-12-28 03:02:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:07,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:07,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117546464] [2021-12-28 03:02:07,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117546464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:07,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:07,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:07,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396908130] [2021-12-28 03:02:07,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:07,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:07,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:07,848 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:07,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 93 transitions, 442 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:07,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:07,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:07,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:08,010 INFO L129 PetriNetUnfolder]: 40/235 cut-off events. [2021-12-28 03:02:08,010 INFO L130 PetriNetUnfolder]: For 1119/1120 co-relation queries the response was YES. [2021-12-28 03:02:08,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 235 events. 40/235 cut-off events. For 1119/1120 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 840 event pairs, 3 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 919. Up to 39 conditions per place. [2021-12-28 03:02:08,012 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 41 selfloop transitions, 18 changer transitions 21/135 dead transitions. [2021-12-28 03:02:08,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 135 transitions, 1035 flow [2021-12-28 03:02:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 03:02:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-28 03:02:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1080 transitions. [2021-12-28 03:02:08,017 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2021-12-28 03:02:08,017 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1080 transitions. [2021-12-28 03:02:08,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1080 transitions. [2021-12-28 03:02:08,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:08,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1080 transitions. [2021-12-28 03:02:08,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.5) internal successors, (1080), 16 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,020 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 102.0) internal successors, (1734), 17 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,020 INFO L186 Difference]: Start difference. First operand has 187 places, 93 transitions, 442 flow. Second operand 16 states and 1080 transitions. [2021-12-28 03:02:08,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 135 transitions, 1035 flow [2021-12-28 03:02:08,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 135 transitions, 769 flow, removed 70 selfloop flow, removed 24 redundant places. [2021-12-28 03:02:08,026 INFO L242 Difference]: Finished difference. Result has 160 places, 103 transitions, 510 flow [2021-12-28 03:02:08,026 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=510, PETRI_PLACES=160, PETRI_TRANSITIONS=103} [2021-12-28 03:02:08,026 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 69 predicate places. [2021-12-28 03:02:08,026 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 103 transitions, 510 flow [2021-12-28 03:02:08,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,027 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:08,027 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:08,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-28 03:02:08,027 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:08,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2096134828, now seen corresponding path program 14 times [2021-12-28 03:02:08,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:08,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892078920] [2021-12-28 03:02:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:08,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:08,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:08,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892078920] [2021-12-28 03:02:08,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892078920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:08,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:08,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:08,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749206667] [2021-12-28 03:02:08,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:08,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:08,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:08,123 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:08,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 103 transitions, 510 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:08,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:08,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:08,359 INFO L129 PetriNetUnfolder]: 39/248 cut-off events. [2021-12-28 03:02:08,360 INFO L130 PetriNetUnfolder]: For 673/674 co-relation queries the response was YES. [2021-12-28 03:02:08,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 248 events. 39/248 cut-off events. For 673/674 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 927 event pairs, 0 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 890. Up to 39 conditions per place. [2021-12-28 03:02:08,367 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 44 selfloop transitions, 23 changer transitions 31/153 dead transitions. [2021-12-28 03:02:08,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 153 transitions, 1173 flow [2021-12-28 03:02:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 03:02:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-28 03:02:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1339 transitions. [2021-12-28 03:02:08,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6563725490196078 [2021-12-28 03:02:08,369 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1339 transitions. [2021-12-28 03:02:08,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1339 transitions. [2021-12-28 03:02:08,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:08,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1339 transitions. [2021-12-28 03:02:08,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.95) internal successors, (1339), 20 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,388 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 102.0) internal successors, (2142), 21 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,388 INFO L186 Difference]: Start difference. First operand has 160 places, 103 transitions, 510 flow. Second operand 20 states and 1339 transitions. [2021-12-28 03:02:08,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 153 transitions, 1173 flow [2021-12-28 03:02:08,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 153 transitions, 1053 flow, removed 36 selfloop flow, removed 7 redundant places. [2021-12-28 03:02:08,392 INFO L242 Difference]: Finished difference. Result has 180 places, 112 transitions, 646 flow [2021-12-28 03:02:08,392 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=646, PETRI_PLACES=180, PETRI_TRANSITIONS=112} [2021-12-28 03:02:08,392 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 89 predicate places. [2021-12-28 03:02:08,392 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 112 transitions, 646 flow [2021-12-28 03:02:08,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,393 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:08,393 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:08,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-28 03:02:08,393 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2128565562, now seen corresponding path program 15 times [2021-12-28 03:02:08,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:08,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616548691] [2021-12-28 03:02:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:08,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:08,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:08,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616548691] [2021-12-28 03:02:08,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616548691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:08,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:08,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:08,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588435529] [2021-12-28 03:02:08,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:08,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:08,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:08,475 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:08,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 112 transitions, 646 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:08,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:08,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:08,677 INFO L129 PetriNetUnfolder]: 34/241 cut-off events. [2021-12-28 03:02:08,677 INFO L130 PetriNetUnfolder]: For 798/799 co-relation queries the response was YES. [2021-12-28 03:02:08,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 241 events. 34/241 cut-off events. For 798/799 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 881 event pairs, 3 based on Foata normal form. 1/241 useless extension candidates. Maximal degree in co-relation 912. Up to 31 conditions per place. [2021-12-28 03:02:08,678 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 42 selfloop transitions, 22 changer transitions 33/152 dead transitions. [2021-12-28 03:02:08,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 152 transitions, 1225 flow [2021-12-28 03:02:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 03:02:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-28 03:02:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1468 transitions. [2021-12-28 03:02:08,681 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6541889483065954 [2021-12-28 03:02:08,681 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1468 transitions. [2021-12-28 03:02:08,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1468 transitions. [2021-12-28 03:02:08,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:08,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1468 transitions. [2021-12-28 03:02:08,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.72727272727273) internal successors, (1468), 22 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,684 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 102.0) internal successors, (2346), 23 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,684 INFO L186 Difference]: Start difference. First operand has 180 places, 112 transitions, 646 flow. Second operand 22 states and 1468 transitions. [2021-12-28 03:02:08,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 152 transitions, 1225 flow [2021-12-28 03:02:08,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 152 transitions, 1064 flow, removed 64 selfloop flow, removed 12 redundant places. [2021-12-28 03:02:08,689 INFO L242 Difference]: Finished difference. Result has 189 places, 110 transitions, 618 flow [2021-12-28 03:02:08,689 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=618, PETRI_PLACES=189, PETRI_TRANSITIONS=110} [2021-12-28 03:02:08,689 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 98 predicate places. [2021-12-28 03:02:08,689 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 110 transitions, 618 flow [2021-12-28 03:02:08,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,689 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:08,689 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:08,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-28 03:02:08,690 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1778296578, now seen corresponding path program 16 times [2021-12-28 03:02:08,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:08,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000813216] [2021-12-28 03:02:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:08,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:08,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:08,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000813216] [2021-12-28 03:02:08,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000813216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:08,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:08,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:08,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751401907] [2021-12-28 03:02:08,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:08,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:08,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:08,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:08,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:08,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 110 transitions, 618 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,766 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:08,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:08,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:08,922 INFO L129 PetriNetUnfolder]: 24/194 cut-off events. [2021-12-28 03:02:08,922 INFO L130 PetriNetUnfolder]: For 603/604 co-relation queries the response was YES. [2021-12-28 03:02:08,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 194 events. 24/194 cut-off events. For 603/604 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 561 event pairs, 3 based on Foata normal form. 1/194 useless extension candidates. Maximal degree in co-relation 708. Up to 30 conditions per place. [2021-12-28 03:02:08,924 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 35 selfloop transitions, 10 changer transitions 30/130 dead transitions. [2021-12-28 03:02:08,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 130 transitions, 930 flow [2021-12-28 03:02:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1201 transitions. [2021-12-28 03:02:08,925 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6541394335511983 [2021-12-28 03:02:08,925 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1201 transitions. [2021-12-28 03:02:08,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1201 transitions. [2021-12-28 03:02:08,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:08,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1201 transitions. [2021-12-28 03:02:08,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.72222222222223) internal successors, (1201), 18 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,928 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,928 INFO L186 Difference]: Start difference. First operand has 189 places, 110 transitions, 618 flow. Second operand 18 states and 1201 transitions. [2021-12-28 03:02:08,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 130 transitions, 930 flow [2021-12-28 03:02:08,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 130 transitions, 811 flow, removed 35 selfloop flow, removed 20 redundant places. [2021-12-28 03:02:08,933 INFO L242 Difference]: Finished difference. Result has 179 places, 95 transitions, 426 flow [2021-12-28 03:02:08,933 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=426, PETRI_PLACES=179, PETRI_TRANSITIONS=95} [2021-12-28 03:02:08,934 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 88 predicate places. [2021-12-28 03:02:08,934 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 95 transitions, 426 flow [2021-12-28 03:02:08,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:08,934 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:08,934 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:08,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-28 03:02:08,934 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2002258780, now seen corresponding path program 17 times [2021-12-28 03:02:08,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:08,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902798950] [2021-12-28 03:02:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:08,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:09,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:09,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902798950] [2021-12-28 03:02:09,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902798950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:09,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:09,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:09,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730362935] [2021-12-28 03:02:09,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:09,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:09,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:09,014 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:09,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 95 transitions, 426 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:09,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:09,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:09,216 INFO L129 PetriNetUnfolder]: 29/201 cut-off events. [2021-12-28 03:02:09,216 INFO L130 PetriNetUnfolder]: For 652/653 co-relation queries the response was YES. [2021-12-28 03:02:09,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 201 events. 29/201 cut-off events. For 652/653 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 590 event pairs, 4 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 731. Up to 30 conditions per place. [2021-12-28 03:02:09,218 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 33 selfloop transitions, 20 changer transitions 23/131 dead transitions. [2021-12-28 03:02:09,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 131 transitions, 918 flow [2021-12-28 03:02:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1206 transitions. [2021-12-28 03:02:09,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2021-12-28 03:02:09,220 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1206 transitions. [2021-12-28 03:02:09,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1206 transitions. [2021-12-28 03:02:09,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:09,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1206 transitions. [2021-12-28 03:02:09,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.0) internal successors, (1206), 18 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,223 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,223 INFO L186 Difference]: Start difference. First operand has 179 places, 95 transitions, 426 flow. Second operand 18 states and 1206 transitions. [2021-12-28 03:02:09,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 131 transitions, 918 flow [2021-12-28 03:02:09,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 131 transitions, 766 flow, removed 28 selfloop flow, removed 17 redundant places. [2021-12-28 03:02:09,226 INFO L242 Difference]: Finished difference. Result has 165 places, 104 transitions, 535 flow [2021-12-28 03:02:09,227 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=535, PETRI_PLACES=165, PETRI_TRANSITIONS=104} [2021-12-28 03:02:09,227 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 74 predicate places. [2021-12-28 03:02:09,227 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 104 transitions, 535 flow [2021-12-28 03:02:09,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,227 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:09,228 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:09,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-28 03:02:09,228 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash -445289574, now seen corresponding path program 18 times [2021-12-28 03:02:09,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:09,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575067500] [2021-12-28 03:02:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:09,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:09,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:09,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575067500] [2021-12-28 03:02:09,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575067500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:09,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:09,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:09,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299416006] [2021-12-28 03:02:09,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:09,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:09,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:09,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:09,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:09,313 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:09,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 104 transitions, 535 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:09,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:09,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:09,511 INFO L129 PetriNetUnfolder]: 25/203 cut-off events. [2021-12-28 03:02:09,511 INFO L130 PetriNetUnfolder]: For 442/443 co-relation queries the response was YES. [2021-12-28 03:02:09,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 203 events. 25/203 cut-off events. For 442/443 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 598 event pairs, 0 based on Foata normal form. 1/204 useless extension candidates. Maximal degree in co-relation 683. Up to 30 conditions per place. [2021-12-28 03:02:09,513 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 34 selfloop transitions, 22 changer transitions 24/135 dead transitions. [2021-12-28 03:02:09,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 135 transitions, 959 flow [2021-12-28 03:02:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 03:02:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-28 03:02:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1142 transitions. [2021-12-28 03:02:09,514 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6585928489042676 [2021-12-28 03:02:09,514 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1142 transitions. [2021-12-28 03:02:09,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1142 transitions. [2021-12-28 03:02:09,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:09,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1142 transitions. [2021-12-28 03:02:09,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.17647058823529) internal successors, (1142), 17 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,517 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,517 INFO L186 Difference]: Start difference. First operand has 165 places, 104 transitions, 535 flow. Second operand 17 states and 1142 transitions. [2021-12-28 03:02:09,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 135 transitions, 959 flow [2021-12-28 03:02:09,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 135 transitions, 876 flow, removed 37 selfloop flow, removed 6 redundant places. [2021-12-28 03:02:09,521 INFO L242 Difference]: Finished difference. Result has 176 places, 108 transitions, 615 flow [2021-12-28 03:02:09,521 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=615, PETRI_PLACES=176, PETRI_TRANSITIONS=108} [2021-12-28 03:02:09,523 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 85 predicate places. [2021-12-28 03:02:09,523 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 108 transitions, 615 flow [2021-12-28 03:02:09,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,523 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:09,523 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:09,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-28 03:02:09,524 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash -453206120, now seen corresponding path program 19 times [2021-12-28 03:02:09,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:09,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095517607] [2021-12-28 03:02:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:09,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:09,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095517607] [2021-12-28 03:02:09,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095517607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:09,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:09,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:09,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402156598] [2021-12-28 03:02:09,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:09,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:09,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:09,605 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:09,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 108 transitions, 615 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:09,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:09,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:09,775 INFO L129 PetriNetUnfolder]: 19/188 cut-off events. [2021-12-28 03:02:09,775 INFO L130 PetriNetUnfolder]: For 386/387 co-relation queries the response was YES. [2021-12-28 03:02:09,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 188 events. 19/188 cut-off events. For 386/387 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 520 event pairs, 0 based on Foata normal form. 1/189 useless extension candidates. Maximal degree in co-relation 637. Up to 30 conditions per place. [2021-12-28 03:02:09,777 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 32 selfloop transitions, 13 changer transitions 28/128 dead transitions. [2021-12-28 03:02:09,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 128 transitions, 923 flow [2021-12-28 03:02:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:02:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:02:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1201 transitions. [2021-12-28 03:02:09,784 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6541394335511983 [2021-12-28 03:02:09,784 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1201 transitions. [2021-12-28 03:02:09,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1201 transitions. [2021-12-28 03:02:09,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:09,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1201 transitions. [2021-12-28 03:02:09,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.72222222222223) internal successors, (1201), 18 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,787 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 102.0) internal successors, (1938), 19 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,787 INFO L186 Difference]: Start difference. First operand has 176 places, 108 transitions, 615 flow. Second operand 18 states and 1201 transitions. [2021-12-28 03:02:09,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 128 transitions, 923 flow [2021-12-28 03:02:09,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 128 transitions, 828 flow, removed 27 selfloop flow, removed 9 redundant places. [2021-12-28 03:02:09,792 INFO L242 Difference]: Finished difference. Result has 184 places, 99 transitions, 487 flow [2021-12-28 03:02:09,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=487, PETRI_PLACES=184, PETRI_TRANSITIONS=99} [2021-12-28 03:02:09,792 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 93 predicate places. [2021-12-28 03:02:09,792 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 99 transitions, 487 flow [2021-12-28 03:02:09,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,792 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:02:09,792 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:02:09,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-28 03:02:09,793 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:02:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:02:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash 542281632, now seen corresponding path program 20 times [2021-12-28 03:02:09,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:02:09,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214850919] [2021-12-28 03:02:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:02:09,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:02:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:02:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:02:09,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:02:09,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214850919] [2021-12-28 03:02:09,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214850919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:02:09,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:02:09,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:02:09,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553611096] [2021-12-28 03:02:09,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:02:09,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:02:09,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:02:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:02:09,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:02:09,860 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 102 [2021-12-28 03:02:09,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 99 transitions, 487 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:02:09,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 102 [2021-12-28 03:02:09,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:02:09,994 INFO L129 PetriNetUnfolder]: 11/117 cut-off events. [2021-12-28 03:02:09,994 INFO L130 PetriNetUnfolder]: For 230/231 co-relation queries the response was YES. [2021-12-28 03:02:09,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 117 events. 11/117 cut-off events. For 230/231 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 205 event pairs, 0 based on Foata normal form. 1/118 useless extension candidates. Maximal degree in co-relation 381. Up to 12 conditions per place. [2021-12-28 03:02:09,995 INFO L132 encePairwiseOnDemand]: 89/102 looper letters, 0 selfloop transitions, 0 changer transitions 89/89 dead transitions. [2021-12-28 03:02:09,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 89 transitions, 585 flow [2021-12-28 03:02:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 03:02:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-28 03:02:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1111 transitions. [2021-12-28 03:02:09,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6407151095732411 [2021-12-28 03:02:09,996 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1111 transitions. [2021-12-28 03:02:09,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1111 transitions. [2021-12-28 03:02:09,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:02:09,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1111 transitions. [2021-12-28 03:02:09,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.3529411764706) internal successors, (1111), 17 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,999 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:09,999 INFO L186 Difference]: Start difference. First operand has 184 places, 99 transitions, 487 flow. Second operand 17 states and 1111 transitions. [2021-12-28 03:02:09,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 89 transitions, 585 flow [2021-12-28 03:02:10,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 89 transitions, 484 flow, removed 22 selfloop flow, removed 21 redundant places. [2021-12-28 03:02:10,001 INFO L242 Difference]: Finished difference. Result has 147 places, 0 transitions, 0 flow [2021-12-28 03:02:10,001 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=0, PETRI_PLACES=147, PETRI_TRANSITIONS=0} [2021-12-28 03:02:10,002 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 56 predicate places. [2021-12-28 03:02:10,002 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 0 transitions, 0 flow [2021-12-28 03:02:10,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:02:10,005 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-28 03:02:10,007 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-28 03:02:10,007 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-28 03:02:10,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-28 03:02:10,010 INFO L732 BasicCegarLoop]: Path program histogram: [20, 20, 2, 2, 2, 1] [2021-12-28 03:02:10,012 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-28 03:02:10,012 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 03:02:10,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 03:02:10 BasicIcfg [2021-12-28 03:02:10,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 03:02:10,015 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 03:02:10,015 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 03:02:10,015 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 03:02:10,015 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:01:54" (3/4) ... [2021-12-28 03:02:10,017 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-28 03:02:10,021 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-28 03:02:10,021 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-28 03:02:10,025 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-12-28 03:02:10,025 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-28 03:02:10,025 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-28 03:02:10,025 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-28 03:02:10,049 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-28 03:02:10,049 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 03:02:10,050 INFO L158 Benchmark]: Toolchain (without parser) took 15904.40ms. Allocated memory was 52.4MB in the beginning and 318.8MB in the end (delta: 266.3MB). Free memory was 29.4MB in the beginning and 132.7MB in the end (delta: -103.3MB). Peak memory consumption was 161.6MB. Max. memory is 16.1GB. [2021-12-28 03:02:10,050 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 52.4MB. Free memory was 34.0MB in the beginning and 33.9MB in the end (delta: 37.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 03:02:10,050 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.78ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 29.2MB in the beginning and 50.4MB in the end (delta: -21.2MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-12-28 03:02:10,050 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.66ms. Allocated memory is still 67.1MB. Free memory was 50.2MB in the beginning and 48.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 03:02:10,050 INFO L158 Benchmark]: Boogie Preprocessor took 29.62ms. Allocated memory is still 67.1MB. Free memory was 48.7MB in the beginning and 47.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 03:02:10,050 INFO L158 Benchmark]: RCFGBuilder took 284.04ms. Allocated memory is still 67.1MB. Free memory was 47.5MB in the beginning and 36.0MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-28 03:02:10,050 INFO L158 Benchmark]: TraceAbstraction took 15277.13ms. Allocated memory was 67.1MB in the beginning and 318.8MB in the end (delta: 251.7MB). Free memory was 35.6MB in the beginning and 135.8MB in the end (delta: -100.2MB). Peak memory consumption was 152.2MB. Max. memory is 16.1GB. [2021-12-28 03:02:10,051 INFO L158 Benchmark]: Witness Printer took 34.42ms. Allocated memory is still 318.8MB. Free memory was 135.8MB in the beginning and 132.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 03:02:10,053 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 52.4MB. Free memory was 34.0MB in the beginning and 33.9MB in the end (delta: 37.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.78ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 29.2MB in the beginning and 50.4MB in the end (delta: -21.2MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.66ms. Allocated memory is still 67.1MB. Free memory was 50.2MB in the beginning and 48.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.62ms. Allocated memory is still 67.1MB. Free memory was 48.7MB in the beginning and 47.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 284.04ms. Allocated memory is still 67.1MB. Free memory was 47.5MB in the beginning and 36.0MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 15277.13ms. Allocated memory was 67.1MB in the beginning and 318.8MB in the end (delta: 251.7MB). Free memory was 35.6MB in the beginning and 135.8MB in the end (delta: -100.2MB). Peak memory consumption was 152.2MB. Max. memory is 16.1GB. * Witness Printer took 34.42ms. Allocated memory is still 318.8MB. Free memory was 135.8MB in the beginning and 132.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 69]: 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, 122 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: 15.1s, OverallIterations: 47, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1863 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1863 mSDsluCounter, 9092 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8926 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7632 IncrementalHoareTripleChecker+Invalid, 7665 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 1763 mSDtfsCounter, 7632 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1016 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 871 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1237occurred in iteration=18, InterpolantAutomatonStates: 803, 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, 3.3s InterpolantComputationTime, 3611 NumberOfCodeBlocks, 3611 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 3564 ConstructedInterpolants, 0 QuantifiedInterpolants, 14424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 47 InterpolantComputations, 47 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-28 03:02:10,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE