./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-2.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/parallel-misc-2.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 c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:03:08,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:03:08,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:03:08,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:03:08,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:03:08,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:03:08,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:03:08,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:03:08,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:03:08,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:03:08,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:03:08,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:03:08,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:03:08,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:03:08,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:03:08,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:03:08,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:03:08,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:03:08,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:03:08,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:03:08,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:03:08,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:03:08,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:03:08,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:03:08,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:03:08,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:03:08,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:03:08,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:03:08,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:03:08,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:03:08,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:03:08,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:03:08,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:03:08,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:03:08,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:03:08,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:03:08,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:03:08,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:03:08,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:03:08,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:03:08,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:03:08,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 03:03:09,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:03:09,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:03:09,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:03:09,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:03:09,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:03:09,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:03:09,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:03:09,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:03:09,008 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:03:09,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:03:09,009 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 03:03:09,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:03:09,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 03:03:09,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:03:09,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:03:09,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:03:09,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:03:09,010 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 03:03:09,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:03:09,010 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:03:09,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:03:09,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:03:09,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:03:09,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:03:09,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:03:09,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:03:09,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:03:09,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:03:09,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:03:09,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:03:09,012 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:03:09,012 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:03:09,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:03:09,012 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 [2021-12-28 03:03:09,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:03:09,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:03:09,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:03:09,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:03:09,394 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:03:09,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-12-28 03:03:09,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d84ae4a8/9d7b1c4c0cca4c708a16d6398ea0d17d/FLAG9be8c3fb2 [2021-12-28 03:03:09,820 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:03:09,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-12-28 03:03:09,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d84ae4a8/9d7b1c4c0cca4c708a16d6398ea0d17d/FLAG9be8c3fb2 [2021-12-28 03:03:09,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d84ae4a8/9d7b1c4c0cca4c708a16d6398ea0d17d [2021-12-28 03:03:09,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:03:09,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:03:09,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:03:09,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:03:09,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:03:09,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:03:09" (1/1) ... [2021-12-28 03:03:09,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32644242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:09, skipping insertion in model container [2021-12-28 03:03:09,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:03:09" (1/1) ... [2021-12-28 03:03:09,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:03:09,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:03:10,034 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/parallel-misc-2.wvr.c[2554,2567] [2021-12-28 03:03:10,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:03:10,043 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:03:10,069 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2554,2567] [2021-12-28 03:03:10,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:03:10,081 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:03:10,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10 WrapperNode [2021-12-28 03:03:10,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:03:10,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:03:10,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:03:10,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:03:10,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,120 INFO L137 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2021-12-28 03:03:10,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:03:10,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:03:10,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:03:10,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:03:10,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:03:10,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:03:10,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:03:10,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:03:10,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (1/1) ... [2021-12-28 03:03:10,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:03:10,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:10,179 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 03:03:10,198 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 03:03:10,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:03:10,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-28 03:03:10,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-28 03:03:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-28 03:03:10,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-28 03:03:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:03:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:03:10,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:03:10,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-28 03:03:10,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-28 03:03:10,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:03:10,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:03:10,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:03:10,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:03:10,223 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 03:03:10,337 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:03:10,338 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:03:10,514 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:03:10,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:03:10,529 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 03:03:10,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:03:10 BoogieIcfgContainer [2021-12-28 03:03:10,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:03:10,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:03:10,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:03:10,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:03:10,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:03:09" (1/3) ... [2021-12-28 03:03:10,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7785b12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:03:10, skipping insertion in model container [2021-12-28 03:03:10,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:03:10" (2/3) ... [2021-12-28 03:03:10,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7785b12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:03:10, skipping insertion in model container [2021-12-28 03:03:10,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:03:10" (3/3) ... [2021-12-28 03:03:10,539 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2021-12-28 03:03:10,543 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 03:03:10,543 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:03:10,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:03:10,544 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 03:03:10,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,590 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,590 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,590 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,590 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,592 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,592 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,592 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,599 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,599 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,600 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,600 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:03:10,602 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-28 03:03:10,634 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:03:10,646 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 03:03:10,646 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-28 03:03:10,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2021-12-28 03:03:10,684 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2021-12-28 03:03:10,685 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:03:10,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-12-28 03:03:10,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2021-12-28 03:03:10,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2021-12-28 03:03:10,723 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2021-12-28 03:03:10,723 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:03:10,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:10,724 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] [2021-12-28 03:03:10,725 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1147510984, now seen corresponding path program 1 times [2021-12-28 03:03:10,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:10,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816345674] [2021-12-28 03:03:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:10,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:11,184 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 03:03:11,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:11,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816345674] [2021-12-28 03:03:11,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816345674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:11,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:11,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:03:11,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368960916] [2021-12-28 03:03:11,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:11,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:03:11,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:11,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:03:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:03:11,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-28 03:03:11,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 03:03:11,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:11,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-28 03:03:11,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:11,416 INFO L129 PetriNetUnfolder]: 83/278 cut-off events. [2021-12-28 03:03:11,417 INFO L130 PetriNetUnfolder]: For 46/53 co-relation queries the response was YES. [2021-12-28 03:03:11,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 278 events. 83/278 cut-off events. For 46/53 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1032 event pairs, 23 based on Foata normal form. 4/238 useless extension candidates. Maximal degree in co-relation 320. Up to 121 conditions per place. [2021-12-28 03:03:11,420 INFO L132 encePairwiseOnDemand]: 86/104 looper letters, 31 selfloop transitions, 9 changer transitions 7/104 dead transitions. [2021-12-28 03:03:11,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 323 flow [2021-12-28 03:03:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:03:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:03:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 725 transitions. [2021-12-28 03:03:11,432 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6971153846153846 [2021-12-28 03:03:11,433 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 725 transitions. [2021-12-28 03:03:11,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 725 transitions. [2021-12-28 03:03:11,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:11,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 725 transitions. [2021-12-28 03:03:11,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.5) internal successors, (725), 10 states have internal predecessors, (725), 0 states have call successors, (0), 0 states 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 03:03:11,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 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 03:03:11,454 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 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 03:03:11,456 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 10 states and 725 transitions. [2021-12-28 03:03:11,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 323 flow [2021-12-28 03:03:11,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:03:11,461 INFO L242 Difference]: Finished difference. Result has 100 places, 91 transitions, 223 flow [2021-12-28 03:03:11,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=223, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2021-12-28 03:03:11,464 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2021-12-28 03:03:11,464 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 223 flow [2021-12-28 03:03:11,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 03:03:11,465 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:11,465 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] [2021-12-28 03:03:11,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:03:11,465 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:11,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1612472794, now seen corresponding path program 1 times [2021-12-28 03:03:11,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:11,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149998662] [2021-12-28 03:03:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:11,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:11,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:11,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149998662] [2021-12-28 03:03:11,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149998662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:11,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:11,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:03:11,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462521954] [2021-12-28 03:03:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:11,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:03:11,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:03:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:03:11,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-28 03:03:11,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 03:03:11,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:11,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-28 03:03:11,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:11,815 INFO L129 PetriNetUnfolder]: 87/304 cut-off events. [2021-12-28 03:03:11,815 INFO L130 PetriNetUnfolder]: For 40/48 co-relation queries the response was YES. [2021-12-28 03:03:11,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 304 events. 87/304 cut-off events. For 40/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1233 event pairs, 10 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 527. Up to 74 conditions per place. [2021-12-28 03:03:11,818 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 43 selfloop transitions, 15 changer transitions 4/123 dead transitions. [2021-12-28 03:03:11,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 434 flow [2021-12-28 03:03:11,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:03:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 03:03:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 542 transitions. [2021-12-28 03:03:11,820 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7445054945054945 [2021-12-28 03:03:11,820 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 542 transitions. [2021-12-28 03:03:11,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 542 transitions. [2021-12-28 03:03:11,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:11,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 542 transitions. [2021-12-28 03:03:11,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.42857142857143) internal successors, (542), 7 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 03:03:11,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 03:03:11,823 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 03:03:11,823 INFO L186 Difference]: Start difference. First operand has 100 places, 91 transitions, 223 flow. Second operand 7 states and 542 transitions. [2021-12-28 03:03:11,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 434 flow [2021-12-28 03:03:11,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 415 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-12-28 03:03:11,826 INFO L242 Difference]: Finished difference. Result has 97 places, 98 transitions, 279 flow [2021-12-28 03:03:11,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2021-12-28 03:03:11,827 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2021-12-28 03:03:11,827 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 279 flow [2021-12-28 03:03:11,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 03:03:11,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:11,828 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] [2021-12-28 03:03:11,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:03:11,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:11,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1489782240, now seen corresponding path program 2 times [2021-12-28 03:03:11,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:11,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577529703] [2021-12-28 03:03:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:11,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:11,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577529703] [2021-12-28 03:03:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577529703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:11,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:11,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:03:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217562431] [2021-12-28 03:03:11,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:11,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:03:11,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:03:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:03:11,924 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-28 03:03:11,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 03:03:11,925 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:11,925 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-28 03:03:11,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:12,044 INFO L129 PetriNetUnfolder]: 84/308 cut-off events. [2021-12-28 03:03:12,044 INFO L130 PetriNetUnfolder]: For 126/130 co-relation queries the response was YES. [2021-12-28 03:03:12,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 308 events. 84/308 cut-off events. For 126/130 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1269 event pairs, 13 based on Foata normal form. 7/295 useless extension candidates. Maximal degree in co-relation 326. Up to 48 conditions per place. [2021-12-28 03:03:12,046 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 39 selfloop transitions, 16 changer transitions 4/120 dead transitions. [2021-12-28 03:03:12,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 120 transitions, 482 flow [2021-12-28 03:03:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:03:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 03:03:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 536 transitions. [2021-12-28 03:03:12,048 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2021-12-28 03:03:12,048 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 536 transitions. [2021-12-28 03:03:12,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 536 transitions. [2021-12-28 03:03:12,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:12,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 536 transitions. [2021-12-28 03:03:12,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:12,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 03:03:12,052 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 03:03:12,052 INFO L186 Difference]: Start difference. First operand has 97 places, 98 transitions, 279 flow. Second operand 7 states and 536 transitions. [2021-12-28 03:03:12,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 120 transitions, 482 flow [2021-12-28 03:03:12,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 120 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-28 03:03:12,055 INFO L242 Difference]: Finished difference. Result has 105 places, 103 transitions, 373 flow [2021-12-28 03:03:12,056 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=373, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2021-12-28 03:03:12,056 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 13 predicate places. [2021-12-28 03:03:12,056 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 373 flow [2021-12-28 03:03:12,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 03:03:12,057 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:12,057 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] [2021-12-28 03:03:12,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:03:12,058 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:12,058 INFO L85 PathProgramCache]: Analyzing trace with hash 256466347, now seen corresponding path program 1 times [2021-12-28 03:03:12,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:12,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946439049] [2021-12-28 03:03:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:12,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:12,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:12,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946439049] [2021-12-28 03:03:12,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946439049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:12,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209709867] [2021-12-28 03:03:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:12,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:12,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:12,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:12,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:03:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 03:03:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:12,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:12,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209709867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:12,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:12,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-12-28 03:03:12,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638635197] [2021-12-28 03:03:12,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:12,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 03:03:12,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:12,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 03:03:12,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:03:12,944 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-28 03:03:12,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 373 flow. Second operand has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 03:03:12,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:12,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-28 03:03:12,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:13,175 INFO L129 PetriNetUnfolder]: 105/399 cut-off events. [2021-12-28 03:03:13,176 INFO L130 PetriNetUnfolder]: For 482/482 co-relation queries the response was YES. [2021-12-28 03:03:13,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 399 events. 105/399 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1805 event pairs, 6 based on Foata normal form. 9/382 useless extension candidates. Maximal degree in co-relation 501. Up to 65 conditions per place. [2021-12-28 03:03:13,178 INFO L132 encePairwiseOnDemand]: 95/104 looper letters, 66 selfloop transitions, 13 changer transitions 3/143 dead transitions. [2021-12-28 03:03:13,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 143 transitions, 733 flow [2021-12-28 03:03:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:03:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:03:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 692 transitions. [2021-12-28 03:03:13,180 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7393162393162394 [2021-12-28 03:03:13,181 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 692 transitions. [2021-12-28 03:03:13,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 692 transitions. [2021-12-28 03:03:13,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:13,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 692 transitions. [2021-12-28 03:03:13,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 76.88888888888889) internal successors, (692), 9 states have internal predecessors, (692), 0 states have call successors, (0), 0 states 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 03:03:13,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states 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 03:03:13,184 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states 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 03:03:13,184 INFO L186 Difference]: Start difference. First operand has 105 places, 103 transitions, 373 flow. Second operand 9 states and 692 transitions. [2021-12-28 03:03:13,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 143 transitions, 733 flow [2021-12-28 03:03:13,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 721 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-12-28 03:03:13,189 INFO L242 Difference]: Finished difference. Result has 115 places, 108 transitions, 452 flow [2021-12-28 03:03:13,189 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=452, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2021-12-28 03:03:13,190 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 23 predicate places. [2021-12-28 03:03:13,190 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 452 flow [2021-12-28 03:03:13,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 03:03:13,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:13,191 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] [2021-12-28 03:03:13,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 03:03:13,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:13,405 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:13,405 INFO L85 PathProgramCache]: Analyzing trace with hash -995906079, now seen corresponding path program 2 times [2021-12-28 03:03:13,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:13,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103070294] [2021-12-28 03:03:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:13,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:13,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103070294] [2021-12-28 03:03:13,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103070294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:13,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:13,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:03:13,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292783784] [2021-12-28 03:03:13,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:13,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:03:13,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:03:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:03:13,510 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-28 03:03:13,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 452 flow. Second operand has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 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 03:03:13,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:13,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-28 03:03:13,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:13,637 INFO L129 PetriNetUnfolder]: 104/382 cut-off events. [2021-12-28 03:03:13,637 INFO L130 PetriNetUnfolder]: For 666/666 co-relation queries the response was YES. [2021-12-28 03:03:13,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 382 events. 104/382 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1676 event pairs, 9 based on Foata normal form. 1/358 useless extension candidates. Maximal degree in co-relation 695. Up to 105 conditions per place. [2021-12-28 03:03:13,641 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 48 selfloop transitions, 14 changer transitions 3/126 dead transitions. [2021-12-28 03:03:13,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 126 transitions, 673 flow [2021-12-28 03:03:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:03:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 03:03:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 532 transitions. [2021-12-28 03:03:13,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2021-12-28 03:03:13,645 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 532 transitions. [2021-12-28 03:03:13,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 532 transitions. [2021-12-28 03:03:13,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:13,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 532 transitions. [2021-12-28 03:03:13,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:13,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 03:03:13,649 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 03:03:13,649 INFO L186 Difference]: Start difference. First operand has 115 places, 108 transitions, 452 flow. Second operand 7 states and 532 transitions. [2021-12-28 03:03:13,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 126 transitions, 673 flow [2021-12-28 03:03:13,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 126 transitions, 646 flow, removed 9 selfloop flow, removed 3 redundant places. [2021-12-28 03:03:13,655 INFO L242 Difference]: Finished difference. Result has 120 places, 110 transitions, 489 flow [2021-12-28 03:03:13,655 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=489, PETRI_PLACES=120, PETRI_TRANSITIONS=110} [2021-12-28 03:03:13,657 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 28 predicate places. [2021-12-28 03:03:13,657 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 110 transitions, 489 flow [2021-12-28 03:03:13,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 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 03:03:13,657 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:13,657 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, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:13,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:03:13,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1643762059, now seen corresponding path program 1 times [2021-12-28 03:03:13,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:13,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037118937] [2021-12-28 03:03:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:13,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:13,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037118937] [2021-12-28 03:03:13,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037118937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557331184] [2021-12-28 03:03:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:13,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:13,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:13,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:13,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:03:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-28 03:03:13,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:14,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:14,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557331184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:14,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:14,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-12-28 03:03:14,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675502393] [2021-12-28 03:03:14,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:14,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 03:03:14,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 03:03:14,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-12-28 03:03:14,629 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-28 03:03:14,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 110 transitions, 489 flow. Second operand has 20 states, 20 states have (on average 70.15) internal successors, (1403), 20 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states 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 03:03:14,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:14,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-28 03:03:14,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:16,182 INFO L129 PetriNetUnfolder]: 313/843 cut-off events. [2021-12-28 03:03:16,183 INFO L130 PetriNetUnfolder]: For 1964/1964 co-relation queries the response was YES. [2021-12-28 03:03:16,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2390 conditions, 843 events. 313/843 cut-off events. For 1964/1964 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4233 event pairs, 5 based on Foata normal form. 29/817 useless extension candidates. Maximal degree in co-relation 1847. Up to 182 conditions per place. [2021-12-28 03:03:16,189 INFO L132 encePairwiseOnDemand]: 87/104 looper letters, 139 selfloop transitions, 83 changer transitions 0/281 dead transitions. [2021-12-28 03:03:16,189 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 281 transitions, 1913 flow [2021-12-28 03:03:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-28 03:03:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-28 03:03:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3031 transitions. [2021-12-28 03:03:16,195 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6939102564102564 [2021-12-28 03:03:16,195 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3031 transitions. [2021-12-28 03:03:16,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3031 transitions. [2021-12-28 03:03:16,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:16,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3031 transitions. [2021-12-28 03:03:16,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 72.16666666666667) internal successors, (3031), 42 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states 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 03:03:16,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states 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 03:03:16,207 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states 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 03:03:16,207 INFO L186 Difference]: Start difference. First operand has 120 places, 110 transitions, 489 flow. Second operand 42 states and 3031 transitions. [2021-12-28 03:03:16,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 281 transitions, 1913 flow [2021-12-28 03:03:16,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 281 transitions, 1871 flow, removed 9 selfloop flow, removed 5 redundant places. [2021-12-28 03:03:16,214 INFO L242 Difference]: Finished difference. Result has 183 places, 174 transitions, 1237 flow [2021-12-28 03:03:16,215 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1237, PETRI_PLACES=183, PETRI_TRANSITIONS=174} [2021-12-28 03:03:16,215 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 91 predicate places. [2021-12-28 03:03:16,215 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 174 transitions, 1237 flow [2021-12-28 03:03:16,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.15) internal successors, (1403), 20 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states 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 03:03:16,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:16,216 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:16,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:16,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-28 03:03:16,433 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash 627040508, now seen corresponding path program 2 times [2021-12-28 03:03:16,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:16,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434961502] [2021-12-28 03:03:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:16,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 03:03:16,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:16,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434961502] [2021-12-28 03:03:16,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434961502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:16,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:16,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:03:16,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367485939] [2021-12-28 03:03:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:16,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:03:16,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:03:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:03:16,497 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-28 03:03:16,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 174 transitions, 1237 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 03:03:16,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:16,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-28 03:03:16,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:16,696 INFO L129 PetriNetUnfolder]: 392/1476 cut-off events. [2021-12-28 03:03:16,696 INFO L130 PetriNetUnfolder]: For 9574/9655 co-relation queries the response was YES. [2021-12-28 03:03:16,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5660 conditions, 1476 events. 392/1476 cut-off events. For 9574/9655 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10580 event pairs, 89 based on Foata normal form. 34/1370 useless extension candidates. Maximal degree in co-relation 4950. Up to 222 conditions per place. [2021-12-28 03:03:16,716 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 19 selfloop transitions, 5 changer transitions 0/185 dead transitions. [2021-12-28 03:03:16,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 1315 flow [2021-12-28 03:03:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:03:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-28 03:03:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2021-12-28 03:03:16,717 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2021-12-28 03:03:16,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2021-12-28 03:03:16,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2021-12-28 03:03:16,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:16,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2021-12-28 03:03:16,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 03:03:16,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:16,719 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:16,719 INFO L186 Difference]: Start difference. First operand has 183 places, 174 transitions, 1237 flow. Second operand 4 states and 376 transitions. [2021-12-28 03:03:16,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 1315 flow [2021-12-28 03:03:16,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 185 transitions, 1176 flow, removed 40 selfloop flow, removed 11 redundant places. [2021-12-28 03:03:16,746 INFO L242 Difference]: Finished difference. Result has 178 places, 177 transitions, 1132 flow [2021-12-28 03:03:16,746 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1132, PETRI_PLACES=178, PETRI_TRANSITIONS=177} [2021-12-28 03:03:16,747 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 86 predicate places. [2021-12-28 03:03:16,747 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 177 transitions, 1132 flow [2021-12-28 03:03:16,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 03:03:16,747 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:16,748 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:16,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 03:03:16,748 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash -913504088, now seen corresponding path program 1 times [2021-12-28 03:03:16,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:16,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133473858] [2021-12-28 03:03:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:16,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:03:16,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:16,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133473858] [2021-12-28 03:03:16,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133473858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:16,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:16,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:03:16,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436466338] [2021-12-28 03:03:16,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:16,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:03:16,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:03:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:03:16,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-28 03:03:16,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 177 transitions, 1132 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 03:03:16,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:16,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-28 03:03:16,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:17,189 INFO L129 PetriNetUnfolder]: 744/2581 cut-off events. [2021-12-28 03:03:17,190 INFO L130 PetriNetUnfolder]: For 15966/16070 co-relation queries the response was YES. [2021-12-28 03:03:17,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10355 conditions, 2581 events. 744/2581 cut-off events. For 15966/16070 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 22277 event pairs, 113 based on Foata normal form. 30/2482 useless extension candidates. Maximal degree in co-relation 8938. Up to 360 conditions per place. [2021-12-28 03:03:17,216 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 21 selfloop transitions, 6 changer transitions 0/191 dead transitions. [2021-12-28 03:03:17,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 191 transitions, 1233 flow [2021-12-28 03:03:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:03:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-28 03:03:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2021-12-28 03:03:17,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2021-12-28 03:03:17,218 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2021-12-28 03:03:17,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2021-12-28 03:03:17,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:17,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2021-12-28 03:03:17,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:17,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:17,221 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:17,221 INFO L186 Difference]: Start difference. First operand has 178 places, 177 transitions, 1132 flow. Second operand 4 states and 375 transitions. [2021-12-28 03:03:17,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 191 transitions, 1233 flow [2021-12-28 03:03:17,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 191 transitions, 1233 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 03:03:17,282 INFO L242 Difference]: Finished difference. Result has 184 places, 180 transitions, 1170 flow [2021-12-28 03:03:17,282 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1170, PETRI_PLACES=184, PETRI_TRANSITIONS=180} [2021-12-28 03:03:17,284 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 92 predicate places. [2021-12-28 03:03:17,284 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 180 transitions, 1170 flow [2021-12-28 03:03:17,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 03:03:17,284 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:17,285 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:17,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 03:03:17,285 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash -990376246, now seen corresponding path program 1 times [2021-12-28 03:03:17,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:17,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092928156] [2021-12-28 03:03:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:17,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 03:03:17,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:17,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092928156] [2021-12-28 03:03:17,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092928156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:03:17,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:03:17,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:03:17,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001714452] [2021-12-28 03:03:17,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:03:17,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:03:17,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:03:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:03:17,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-28 03:03:17,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 180 transitions, 1170 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 03:03:17,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:17,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-28 03:03:17,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:17,636 INFO L129 PetriNetUnfolder]: 415/1673 cut-off events. [2021-12-28 03:03:17,636 INFO L130 PetriNetUnfolder]: For 11732/11836 co-relation queries the response was YES. [2021-12-28 03:03:17,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7315 conditions, 1673 events. 415/1673 cut-off events. For 11732/11836 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12896 event pairs, 98 based on Foata normal form. 58/1663 useless extension candidates. Maximal degree in co-relation 6829. Up to 193 conditions per place. [2021-12-28 03:03:17,659 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 15 selfloop transitions, 7 changer transitions 0/186 dead transitions. [2021-12-28 03:03:17,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 186 transitions, 1236 flow [2021-12-28 03:03:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:03:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-28 03:03:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2021-12-28 03:03:17,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8918269230769231 [2021-12-28 03:03:17,661 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2021-12-28 03:03:17,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2021-12-28 03:03:17,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:17,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2021-12-28 03:03:17,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 03:03:17,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:17,663 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:17,663 INFO L186 Difference]: Start difference. First operand has 184 places, 180 transitions, 1170 flow. Second operand 4 states and 371 transitions. [2021-12-28 03:03:17,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 186 transitions, 1236 flow [2021-12-28 03:03:17,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 186 transitions, 1236 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 03:03:17,702 INFO L242 Difference]: Finished difference. Result has 189 places, 182 transitions, 1210 flow [2021-12-28 03:03:17,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1210, PETRI_PLACES=189, PETRI_TRANSITIONS=182} [2021-12-28 03:03:17,702 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 97 predicate places. [2021-12-28 03:03:17,703 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 182 transitions, 1210 flow [2021-12-28 03:03:17,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 03:03:17,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:17,703 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:17,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 03:03:17,704 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1464456534, now seen corresponding path program 1 times [2021-12-28 03:03:17,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:17,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78977931] [2021-12-28 03:03:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:17,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:17,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:17,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78977931] [2021-12-28 03:03:17,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78977931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:17,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467730228] [2021-12-28 03:03:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:17,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:17,868 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:17,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:03:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:03:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:18,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:18,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467730228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:18,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:18,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-28 03:03:18,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164094063] [2021-12-28 03:03:18,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:18,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:03:18,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:18,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:03:18,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:03:18,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-28 03:03:18,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 182 transitions, 1210 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 03:03:18,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:18,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-28 03:03:18,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:18,953 INFO L129 PetriNetUnfolder]: 761/3083 cut-off events. [2021-12-28 03:03:18,953 INFO L130 PetriNetUnfolder]: For 22061/22238 co-relation queries the response was YES. [2021-12-28 03:03:18,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13471 conditions, 3083 events. 761/3083 cut-off events. For 22061/22238 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 27583 event pairs, 192 based on Foata normal form. 63/3038 useless extension candidates. Maximal degree in co-relation 12013. Up to 354 conditions per place. [2021-12-28 03:03:18,994 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 29 selfloop transitions, 20 changer transitions 4/213 dead transitions. [2021-12-28 03:03:18,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 213 transitions, 1409 flow [2021-12-28 03:03:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:03:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:03:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 844 transitions. [2021-12-28 03:03:18,997 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8115384615384615 [2021-12-28 03:03:18,997 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 844 transitions. [2021-12-28 03:03:18,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 844 transitions. [2021-12-28 03:03:18,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:18,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 844 transitions. [2021-12-28 03:03:19,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.4) internal successors, (844), 10 states have internal predecessors, (844), 0 states have call successors, (0), 0 states 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 03:03:19,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 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 03:03:19,002 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 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 03:03:19,002 INFO L186 Difference]: Start difference. First operand has 189 places, 182 transitions, 1210 flow. Second operand 10 states and 844 transitions. [2021-12-28 03:03:19,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 213 transitions, 1409 flow [2021-12-28 03:03:19,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 213 transitions, 1401 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-12-28 03:03:19,052 INFO L242 Difference]: Finished difference. Result has 200 places, 193 transitions, 1308 flow [2021-12-28 03:03:19,053 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1308, PETRI_PLACES=200, PETRI_TRANSITIONS=193} [2021-12-28 03:03:19,053 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 108 predicate places. [2021-12-28 03:03:19,053 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 193 transitions, 1308 flow [2021-12-28 03:03:19,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 03:03:19,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:19,054 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:19,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-28 03:03:19,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:19,267 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 419087372, now seen corresponding path program 2 times [2021-12-28 03:03:19,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:19,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841360173] [2021-12-28 03:03:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:19,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:19,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:19,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841360173] [2021-12-28 03:03:19,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841360173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:19,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024530176] [2021-12-28 03:03:19,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:03:19,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:19,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:19,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:19,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:03:19,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:03:19,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:03:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:03:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:19,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:19,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024530176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:19,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:19,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-28 03:03:19,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030878367] [2021-12-28 03:03:19,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:19,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 03:03:19,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:19,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 03:03:19,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:03:19,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-28 03:03:19,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 193 transitions, 1308 flow. Second operand has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 03:03:19,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:19,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-28 03:03:19,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:21,214 INFO L129 PetriNetUnfolder]: 1735/5296 cut-off events. [2021-12-28 03:03:21,215 INFO L130 PetriNetUnfolder]: For 46143/46172 co-relation queries the response was YES. [2021-12-28 03:03:21,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26284 conditions, 5296 events. 1735/5296 cut-off events. For 46143/46172 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 49050 event pairs, 470 based on Foata normal form. 15/5267 useless extension candidates. Maximal degree in co-relation 26176. Up to 1521 conditions per place. [2021-12-28 03:03:21,268 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 331 selfloop transitions, 28 changer transitions 4/440 dead transitions. [2021-12-28 03:03:21,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 440 transitions, 4362 flow [2021-12-28 03:03:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:03:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-28 03:03:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 845 transitions. [2021-12-28 03:03:21,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386363636363636 [2021-12-28 03:03:21,271 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 845 transitions. [2021-12-28 03:03:21,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 845 transitions. [2021-12-28 03:03:21,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:21,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 845 transitions. [2021-12-28 03:03:21,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.81818181818181) internal successors, (845), 11 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 03:03:21,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,274 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:21,274 INFO L186 Difference]: Start difference. First operand has 200 places, 193 transitions, 1308 flow. Second operand 11 states and 845 transitions. [2021-12-28 03:03:21,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 440 transitions, 4362 flow [2021-12-28 03:03:21,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 440 transitions, 4276 flow, removed 33 selfloop flow, removed 7 redundant places. [2021-12-28 03:03:21,361 INFO L242 Difference]: Finished difference. Result has 204 places, 201 transitions, 1366 flow [2021-12-28 03:03:21,361 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1366, PETRI_PLACES=204, PETRI_TRANSITIONS=201} [2021-12-28 03:03:21,361 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 112 predicate places. [2021-12-28 03:03:21,362 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 201 transitions, 1366 flow [2021-12-28 03:03:21,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 03:03:21,362 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:21,363 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:21,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:21,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:21,581 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1103714706, now seen corresponding path program 3 times [2021-12-28 03:03:21,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:21,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901382206] [2021-12-28 03:03:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:21,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:21,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901382206] [2021-12-28 03:03:21,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901382206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582091316] [2021-12-28 03:03:21,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:03:21,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:21,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:21,728 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:21,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:03:21,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-28 03:03:21,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:03:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:03:21,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:22,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:22,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582091316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:22,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:22,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-28 03:03:22,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103260782] [2021-12-28 03:03:22,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:22,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:03:22,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:22,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:03:22,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:03:22,355 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-28 03:03:22,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 201 transitions, 1366 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 03:03:22,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:22,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-28 03:03:22,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:23,400 INFO L129 PetriNetUnfolder]: 1059/4424 cut-off events. [2021-12-28 03:03:23,400 INFO L130 PetriNetUnfolder]: For 33809/34109 co-relation queries the response was YES. [2021-12-28 03:03:23,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19931 conditions, 4424 events. 1059/4424 cut-off events. For 33809/34109 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 43400 event pairs, 314 based on Foata normal form. 110/4379 useless extension candidates. Maximal degree in co-relation 19813. Up to 599 conditions per place. [2021-12-28 03:03:23,445 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 47 selfloop transitions, 23 changer transitions 4/234 dead transitions. [2021-12-28 03:03:23,445 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 234 transitions, 1669 flow [2021-12-28 03:03:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:03:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:03:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2021-12-28 03:03:23,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2021-12-28 03:03:23,447 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2021-12-28 03:03:23,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2021-12-28 03:03:23,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:23,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2021-12-28 03:03:23,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states 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 03:03:23,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 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 03:03:23,451 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 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 03:03:23,451 INFO L186 Difference]: Start difference. First operand has 204 places, 201 transitions, 1366 flow. Second operand 10 states and 843 transitions. [2021-12-28 03:03:23,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 234 transitions, 1669 flow [2021-12-28 03:03:23,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 234 transitions, 1599 flow, removed 25 selfloop flow, removed 6 redundant places. [2021-12-28 03:03:23,507 INFO L242 Difference]: Finished difference. Result has 210 places, 214 transitions, 1491 flow [2021-12-28 03:03:23,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1491, PETRI_PLACES=210, PETRI_TRANSITIONS=214} [2021-12-28 03:03:23,508 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 118 predicate places. [2021-12-28 03:03:23,509 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 214 transitions, 1491 flow [2021-12-28 03:03:23,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 03:03:23,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:23,509 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:23,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:23,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-28 03:03:23,724 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:23,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1223366174, now seen corresponding path program 4 times [2021-12-28 03:03:23,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:23,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269942177] [2021-12-28 03:03:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:23,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:23,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269942177] [2021-12-28 03:03:23,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269942177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766899931] [2021-12-28 03:03:23,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 03:03:23,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:23,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:23,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:23,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:03:23,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 03:03:23,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:03:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:03:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:24,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 03:03:24,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766899931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:24,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:24,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-28 03:03:24,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536695333] [2021-12-28 03:03:24,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:24,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:03:24,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:24,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:03:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:03:24,389 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-28 03:03:24,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 214 transitions, 1491 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 03:03:24,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:24,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-28 03:03:24,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:25,221 INFO L129 PetriNetUnfolder]: 1185/4954 cut-off events. [2021-12-28 03:03:25,221 INFO L130 PetriNetUnfolder]: For 38316/38644 co-relation queries the response was YES. [2021-12-28 03:03:25,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22466 conditions, 4954 events. 1185/4954 cut-off events. For 38316/38644 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 50265 event pairs, 338 based on Foata normal form. 126/4910 useless extension candidates. Maximal degree in co-relation 22335. Up to 675 conditions per place. [2021-12-28 03:03:25,274 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 61 selfloop transitions, 23 changer transitions 4/248 dead transitions. [2021-12-28 03:03:25,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 248 transitions, 1830 flow [2021-12-28 03:03:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:03:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:03:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2021-12-28 03:03:25,276 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2021-12-28 03:03:25,276 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2021-12-28 03:03:25,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2021-12-28 03:03:25,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:25,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2021-12-28 03:03:25,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states 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 03:03:25,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 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 03:03:25,280 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 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 03:03:25,280 INFO L186 Difference]: Start difference. First operand has 210 places, 214 transitions, 1491 flow. Second operand 10 states and 843 transitions. [2021-12-28 03:03:25,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 248 transitions, 1830 flow [2021-12-28 03:03:25,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 248 transitions, 1801 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-12-28 03:03:25,413 INFO L242 Difference]: Finished difference. Result has 217 places, 228 transitions, 1661 flow [2021-12-28 03:03:25,413 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1661, PETRI_PLACES=217, PETRI_TRANSITIONS=228} [2021-12-28 03:03:25,414 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 125 predicate places. [2021-12-28 03:03:25,414 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 228 transitions, 1661 flow [2021-12-28 03:03:25,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 03:03:25,415 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:25,415 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:25,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-28 03:03:25,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:25,647 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1902387016, now seen corresponding path program 5 times [2021-12-28 03:03:25,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:25,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618682242] [2021-12-28 03:03:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:25,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:25,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618682242] [2021-12-28 03:03:25,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618682242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367935172] [2021-12-28 03:03:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 03:03:25,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:25,814 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:25,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:03:25,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-28 03:03:25,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:03:25,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:03:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:26,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:26,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367935172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:26,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:26,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-28 03:03:26,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109809547] [2021-12-28 03:03:26,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:26,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:03:26,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:26,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:03:26,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:03:26,331 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-28 03:03:26,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 228 transitions, 1661 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 03:03:26,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:26,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-28 03:03:26,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:27,539 INFO L129 PetriNetUnfolder]: 1429/6168 cut-off events. [2021-12-28 03:03:27,540 INFO L130 PetriNetUnfolder]: For 50401/50842 co-relation queries the response was YES. [2021-12-28 03:03:27,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28610 conditions, 6168 events. 1429/6168 cut-off events. For 50401/50842 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 65914 event pairs, 394 based on Foata normal form. 233/6227 useless extension candidates. Maximal degree in co-relation 28450. Up to 717 conditions per place. [2021-12-28 03:03:27,603 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 51 selfloop transitions, 51 changer transitions 4/266 dead transitions. [2021-12-28 03:03:27,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 266 transitions, 2070 flow [2021-12-28 03:03:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:03:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-28 03:03:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2021-12-28 03:03:27,605 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2021-12-28 03:03:27,605 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2021-12-28 03:03:27,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2021-12-28 03:03:27,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:27,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2021-12-28 03:03:27,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 03:03:27,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:27,608 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:27,609 INFO L186 Difference]: Start difference. First operand has 217 places, 228 transitions, 1661 flow. Second operand 11 states and 933 transitions. [2021-12-28 03:03:27,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 266 transitions, 2070 flow [2021-12-28 03:03:27,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 266 transitions, 2025 flow, removed 18 selfloop flow, removed 5 redundant places. [2021-12-28 03:03:27,705 INFO L242 Difference]: Finished difference. Result has 223 places, 240 transitions, 1869 flow [2021-12-28 03:03:27,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1869, PETRI_PLACES=223, PETRI_TRANSITIONS=240} [2021-12-28 03:03:27,706 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 131 predicate places. [2021-12-28 03:03:27,706 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 240 transitions, 1869 flow [2021-12-28 03:03:27,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 03:03:27,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:27,707 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:27,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:27,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:27,923 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1115209364, now seen corresponding path program 6 times [2021-12-28 03:03:27,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:27,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6777436] [2021-12-28 03:03:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:27,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:28,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:28,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6777436] [2021-12-28 03:03:28,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6777436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:28,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508734632] [2021-12-28 03:03:28,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 03:03:28,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:28,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:28,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:28,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:03:28,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-28 03:03:28,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:03:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:03:28,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:28,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:28,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508734632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:28,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:28,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-28 03:03:28,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222418323] [2021-12-28 03:03:28,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:28,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:03:28,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:03:28,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:03:28,595 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-28 03:03:28,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 240 transitions, 1869 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 03:03:28,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:28,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-28 03:03:28,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:29,925 INFO L129 PetriNetUnfolder]: 1708/7358 cut-off events. [2021-12-28 03:03:29,925 INFO L130 PetriNetUnfolder]: For 62548/63055 co-relation queries the response was YES. [2021-12-28 03:03:29,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34571 conditions, 7358 events. 1708/7358 cut-off events. For 62548/63055 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 81641 event pairs, 517 based on Foata normal form. 166/7302 useless extension candidates. Maximal degree in co-relation 34384. Up to 905 conditions per place. [2021-12-28 03:03:30,007 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 89 selfloop transitions, 33 changer transitions 4/286 dead transitions. [2021-12-28 03:03:30,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 286 transitions, 2417 flow [2021-12-28 03:03:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:03:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-28 03:03:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2021-12-28 03:03:30,009 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2021-12-28 03:03:30,010 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2021-12-28 03:03:30,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2021-12-28 03:03:30,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:30,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2021-12-28 03:03:30,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 0 states have call successors, (0), 0 states 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 03:03:30,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:30,013 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:30,013 INFO L186 Difference]: Start difference. First operand has 223 places, 240 transitions, 1869 flow. Second operand 11 states and 931 transitions. [2021-12-28 03:03:30,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 286 transitions, 2417 flow [2021-12-28 03:03:30,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 286 transitions, 2322 flow, removed 43 selfloop flow, removed 5 redundant places. [2021-12-28 03:03:30,146 INFO L242 Difference]: Finished difference. Result has 231 places, 260 transitions, 2120 flow [2021-12-28 03:03:30,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2120, PETRI_PLACES=231, PETRI_TRANSITIONS=260} [2021-12-28 03:03:30,146 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 139 predicate places. [2021-12-28 03:03:30,147 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 260 transitions, 2120 flow [2021-12-28 03:03:30,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 03:03:30,147 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:30,147 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:30,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 03:03:30,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 03:03:30,363 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:30,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1068784864, now seen corresponding path program 7 times [2021-12-28 03:03:30,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:30,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878314252] [2021-12-28 03:03:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:30,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:30,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878314252] [2021-12-28 03:03:30,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878314252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637897761] [2021-12-28 03:03:30,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 03:03:30,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:30,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:30,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:30,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:03:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:30,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:03:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:30,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:03:31,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637897761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:31,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:31,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-28 03:03:31,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583903291] [2021-12-28 03:03:31,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:31,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:03:31,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:31,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:03:31,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:03:31,020 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-28 03:03:31,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 260 transitions, 2120 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 03:03:31,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:31,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-28 03:03:31,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:03:32,566 INFO L129 PetriNetUnfolder]: 1971/8435 cut-off events. [2021-12-28 03:03:32,566 INFO L130 PetriNetUnfolder]: For 72811/73612 co-relation queries the response was YES. [2021-12-28 03:03:32,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39859 conditions, 8435 events. 1971/8435 cut-off events. For 72811/73612 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 96510 event pairs, 561 based on Foata normal form. 370/8561 useless extension candidates. Maximal degree in co-relation 39653. Up to 999 conditions per place. [2021-12-28 03:03:32,664 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 77 selfloop transitions, 61 changer transitions 4/302 dead transitions. [2021-12-28 03:03:32,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 302 transitions, 2672 flow [2021-12-28 03:03:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:03:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-28 03:03:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2021-12-28 03:03:32,668 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2021-12-28 03:03:32,668 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2021-12-28 03:03:32,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2021-12-28 03:03:32,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:03:32,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2021-12-28 03:03:32,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 03:03:32,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:32,682 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:03:32,683 INFO L186 Difference]: Start difference. First operand has 231 places, 260 transitions, 2120 flow. Second operand 11 states and 933 transitions. [2021-12-28 03:03:32,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 302 transitions, 2672 flow [2021-12-28 03:03:32,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 302 transitions, 2589 flow, removed 37 selfloop flow, removed 5 redundant places. [2021-12-28 03:03:32,830 INFO L242 Difference]: Finished difference. Result has 240 places, 276 transitions, 2462 flow [2021-12-28 03:03:32,830 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2462, PETRI_PLACES=240, PETRI_TRANSITIONS=276} [2021-12-28 03:03:32,831 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 148 predicate places. [2021-12-28 03:03:32,831 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 276 transitions, 2462 flow [2021-12-28 03:03:32,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 03:03:32,831 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:03:32,831 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:03:32,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:03:33,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-28 03:03:33,038 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:03:33,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:03:33,038 INFO L85 PathProgramCache]: Analyzing trace with hash -264766159, now seen corresponding path program 8 times [2021-12-28 03:03:33,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:03:33,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751369467] [2021-12-28 03:03:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:03:33,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:03:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:03:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:33,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:03:33,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751369467] [2021-12-28 03:03:33,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751369467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:03:33,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556148924] [2021-12-28 03:03:33,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:03:33,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:03:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:03:33,457 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:03:33,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:03:33,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:03:33,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:03:33,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-28 03:03:33,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:03:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:35,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:03:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:03:41,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556148924] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:03:41,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:03:41,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 40 [2021-12-28 03:03:41,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405998860] [2021-12-28 03:03:41,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:03:41,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-28 03:03:41,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:03:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-28 03:03:41,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2021-12-28 03:03:41,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-12-28 03:03:41,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 276 transitions, 2462 flow. Second operand has 40 states, 40 states have (on average 65.725) internal successors, (2629), 40 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states 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 03:03:41,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:03:41,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-12-28 03:03:41,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand