./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.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/popl20-nonblocking-cntr-alt.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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:07:39,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:07:39,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:07:39,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:07:39,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:07:39,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:07:39,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:07:39,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:07:39,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:07:39,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:07:39,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:07:39,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:07:39,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:07:39,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:07:39,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:07:39,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:07:39,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:07:39,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:07:39,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:07:39,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:07:39,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:07:39,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:07:39,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:07:39,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:07:39,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:07:39,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:07:39,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:07:39,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:07:39,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:07:39,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:07:39,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:07:39,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:07:39,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:07:39,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:07:39,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:07:39,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:07:39,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:07:39,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:07:39,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:07:39,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:07:39,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:07:39,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 03:07:39,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:07:39,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:07:39,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:07:39,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:07:39,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:07:39,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:07:39,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:07:39,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:07:39,964 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:07:39,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:07:39,965 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 03:07:39,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:07:39,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 03:07:39,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:07:39,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:07:39,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:07:39,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:07:39,966 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 03:07:39,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:07:39,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:07:39,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:07:39,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:07:39,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:07:39,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:07:39,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:07:39,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:07:39,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:07:39,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:07:39,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:07:39,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:07:39,968 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:07:39,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:07:39,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:07:39,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2021-12-28 03:07:40,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:07:40,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:07:40,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:07:40,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:07:40,245 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:07:40,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-28 03:07:40,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d71f8e47/295ca881c9f146ebb0779259a0dab160/FLAG0f21f55f3 [2021-12-28 03:07:40,682 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:07:40,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-28 03:07:40,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d71f8e47/295ca881c9f146ebb0779259a0dab160/FLAG0f21f55f3 [2021-12-28 03:07:40,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d71f8e47/295ca881c9f146ebb0779259a0dab160 [2021-12-28 03:07:40,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:07:40,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:07:40,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:07:40,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:07:40,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:07:40,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:40,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f747a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40, skipping insertion in model container [2021-12-28 03:07:40,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:40,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:07:40,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:07:40,883 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/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-28 03:07:40,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:07:40,898 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:07:40,922 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/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-28 03:07:40,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:07:40,961 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:07:40,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40 WrapperNode [2021-12-28 03:07:40,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:07:40,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:07:40,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:07:40,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:07:40,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:40,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:40,990 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2021-12-28 03:07:40,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:07:40,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:07:40,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:07:40,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:07:40,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:40,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:40,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:40,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:41,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:41,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:41,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:41,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:07:41,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:07:41,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:07:41,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:07:41,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (1/1) ... [2021-12-28 03:07:41,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:07:41,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:41,031 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 03:07:41,038 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 03:07:41,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:07:41,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-28 03:07:41,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-28 03:07:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-28 03:07:41,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-28 03:07:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:07:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:07:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:07:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-28 03:07:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-28 03:07:41,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:07:41,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:07:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:07:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:07:41,067 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 03:07:41,123 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:07:41,125 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:07:41,322 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:07:41,363 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:07:41,363 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 03:07:41,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:07:41 BoogieIcfgContainer [2021-12-28 03:07:41,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:07:41,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:07:41,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:07:41,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:07:41,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:07:40" (1/3) ... [2021-12-28 03:07:41,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74841ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:07:41, skipping insertion in model container [2021-12-28 03:07:41,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:07:40" (2/3) ... [2021-12-28 03:07:41,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74841ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:07:41, skipping insertion in model container [2021-12-28 03:07:41,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:07:41" (3/3) ... [2021-12-28 03:07:41,373 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2021-12-28 03:07:41,377 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 03:07:41,377 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:07:41,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:07:41,378 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 03:07:41,424 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,425 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,426 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,426 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,426 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,428 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,429 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,429 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,429 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,430 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,430 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,430 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,431 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,431 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,432 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,432 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,433 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,433 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,434 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,434 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,435 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,435 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,435 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,436 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,436 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,436 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,437 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,438 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,439 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,439 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,443 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,443 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,444 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,444 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,444 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,447 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,448 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,448 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:07:41,454 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-28 03:07:41,487 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:07:41,492 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 03:07:41,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-28 03:07:41,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2021-12-28 03:07:41,525 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2021-12-28 03:07:41,525 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:07:41,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-28 03:07:41,528 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2021-12-28 03:07:41,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2021-12-28 03:07:41,543 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-12-28 03:07:41,544 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:07:41,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:41,545 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:41,545 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:41,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2021-12-28 03:07:41,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:41,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425385986] [2021-12-28 03:07:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:41,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:41,737 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 03:07:41,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425385986] [2021-12-28 03:07:41,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425385986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:07:41,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:07:41,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 03:07:41,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749820208] [2021-12-28 03:07:41,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:07:41,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 03:07:41,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 03:07:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 03:07:41,778 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2021-12-28 03:07:41,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:41,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:41,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2021-12-28 03:07:41,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:41,833 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2021-12-28 03:07:41,837 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2021-12-28 03:07:41,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2021-12-28 03:07:41,840 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2021-12-28 03:07:41,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2021-12-28 03:07:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 03:07:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-28 03:07:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2021-12-28 03:07:41,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2021-12-28 03:07:41,851 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2021-12-28 03:07:41,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2021-12-28 03:07:41,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:41,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2021-12-28 03:07:41,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:41,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:41,865 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:41,866 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2021-12-28 03:07:41,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2021-12-28 03:07:41,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:07:41,877 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2021-12-28 03:07:41,879 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2021-12-28 03:07:41,882 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2021-12-28 03:07:41,882 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2021-12-28 03:07:41,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:41,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:41,883 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:41,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:07:41,884 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:41,885 INFO L85 PathProgramCache]: Analyzing trace with hash -305653797, now seen corresponding path program 1 times [2021-12-28 03:07:41,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:41,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071140955] [2021-12-28 03:07:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:41,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:42,091 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 03:07:42,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:42,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071140955] [2021-12-28 03:07:42,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071140955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:07:42,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:07:42,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:07:42,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031812126] [2021-12-28 03:07:42,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:07:42,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:07:42,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:07:42,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:07:42,097 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2021-12-28 03:07:42,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:42,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2021-12-28 03:07:42,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:42,194 INFO L129 PetriNetUnfolder]: 41/148 cut-off events. [2021-12-28 03:07:42,194 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-28 03:07:42,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 148 events. 41/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 13 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 240. Up to 58 conditions per place. [2021-12-28 03:07:42,197 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2021-12-28 03:07:42,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 213 flow [2021-12-28 03:07:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:07:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-28 03:07:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2021-12-28 03:07:42,203 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2021-12-28 03:07:42,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2021-12-28 03:07:42,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2021-12-28 03:07:42,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:42,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2021-12-28 03:07:42,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,210 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,210 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 366 transitions. [2021-12-28 03:07:42,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 213 flow [2021-12-28 03:07:42,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 03:07:42,212 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2021-12-28 03:07:42,212 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2021-12-28 03:07:42,213 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2021-12-28 03:07:42,213 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2021-12-28 03:07:42,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:42,214 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:07:42,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:07:42,214 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:42,216 INFO L85 PathProgramCache]: Analyzing trace with hash -443057429, now seen corresponding path program 1 times [2021-12-28 03:07:42,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:42,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623825977] [2021-12-28 03:07:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:42,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:42,315 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 03:07:42,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:42,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623825977] [2021-12-28 03:07:42,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623825977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:42,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022260852] [2021-12-28 03:07:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:42,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:42,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:42,318 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 03:07:42,339 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 03:07:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:42,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 03:07:42,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:42,619 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 03:07:42,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:42,848 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 03:07:42,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022260852] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:42,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:42,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-28 03:07:42,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560663442] [2021-12-28 03:07:42,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:42,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:07:42,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:07:42,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:07:42,854 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2021-12-28 03:07:42,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:42,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2021-12-28 03:07:42,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:42,935 INFO L129 PetriNetUnfolder]: 27/138 cut-off events. [2021-12-28 03:07:42,935 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-12-28 03:07:42,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 138 events. 27/138 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 357 event pairs, 5 based on Foata normal form. 4/136 useless extension candidates. Maximal degree in co-relation 221. Up to 25 conditions per place. [2021-12-28 03:07:42,937 INFO L132 encePairwiseOnDemand]: 81/86 looper letters, 19 selfloop transitions, 7 changer transitions 2/83 dead transitions. [2021-12-28 03:07:42,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 254 flow [2021-12-28 03:07:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:07:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-28 03:07:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2021-12-28 03:07:42,939 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441860465116279 [2021-12-28 03:07:42,941 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2021-12-28 03:07:42,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2021-12-28 03:07:42,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:42,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2021-12-28 03:07:42,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,943 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 5 states and 363 transitions. [2021-12-28 03:07:42,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 254 flow [2021-12-28 03:07:42,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 244 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:07:42,946 INFO L242 Difference]: Finished difference. Result has 81 places, 76 transitions, 212 flow [2021-12-28 03:07:42,946 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2021-12-28 03:07:42,948 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 5 predicate places. [2021-12-28 03:07:42,948 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 212 flow [2021-12-28 03:07:42,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:42,948 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:42,949 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 03:07:42,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:43,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:43,168 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1484029817, now seen corresponding path program 1 times [2021-12-28 03:07:43,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:43,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201942363] [2021-12-28 03:07:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:43,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:43,407 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 03:07:43,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201942363] [2021-12-28 03:07:43,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201942363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864635533] [2021-12-28 03:07:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:43,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:43,409 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 03:07:43,411 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 03:07:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:07:43,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:43,877 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 03:07:43,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:44,360 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 03:07:44,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864635533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:44,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:44,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-28 03:07:44,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269128772] [2021-12-28 03:07:44,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:44,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:07:44,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:07:44,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:07:44,365 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:07:44,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 212 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:44,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:44,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:07:44,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:45,993 INFO L129 PetriNetUnfolder]: 260/787 cut-off events. [2021-12-28 03:07:45,993 INFO L130 PetriNetUnfolder]: For 564/572 co-relation queries the response was YES. [2021-12-28 03:07:45,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 787 events. 260/787 cut-off events. For 564/572 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4626 event pairs, 6 based on Foata normal form. 7/754 useless extension candidates. Maximal degree in co-relation 2076. Up to 143 conditions per place. [2021-12-28 03:07:45,997 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 112 selfloop transitions, 121 changer transitions 53/327 dead transitions. [2021-12-28 03:07:45,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 327 transitions, 1946 flow [2021-12-28 03:07:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-28 03:07:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-28 03:07:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3152 transitions. [2021-12-28 03:07:46,003 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6430028559771522 [2021-12-28 03:07:46,003 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3152 transitions. [2021-12-28 03:07:46,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3152 transitions. [2021-12-28 03:07:46,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:46,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3152 transitions. [2021-12-28 03:07:46,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.29824561403509) internal successors, (3152), 57 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:46,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:46,016 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:46,017 INFO L186 Difference]: Start difference. First operand has 81 places, 76 transitions, 212 flow. Second operand 57 states and 3152 transitions. [2021-12-28 03:07:46,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 327 transitions, 1946 flow [2021-12-28 03:07:46,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 327 transitions, 1946 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 03:07:46,024 INFO L242 Difference]: Finished difference. Result has 168 places, 203 transitions, 1379 flow [2021-12-28 03:07:46,024 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1379, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2021-12-28 03:07:46,025 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2021-12-28 03:07:46,025 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 1379 flow [2021-12-28 03:07:46,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:46,026 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:46,026 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 03:07:46,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 03:07:46,235 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,SelfDestructingSolverStorable3 [2021-12-28 03:07:46,235 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1760521617, now seen corresponding path program 2 times [2021-12-28 03:07:46,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:46,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265196549] [2021-12-28 03:07:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:46,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:46,424 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 03:07:46,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:46,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265196549] [2021-12-28 03:07:46,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265196549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:46,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10218785] [2021-12-28 03:07:46,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:07:46,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:46,426 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 03:07:46,451 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 03:07:46,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:07:46,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:46,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:07:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:46,939 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 03:07:46,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:47,481 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 03:07:47,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10218785] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:47,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:47,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-28 03:07:47,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665030240] [2021-12-28 03:07:47,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:47,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:07:47,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:07:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:07:47,485 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:07:47,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 1379 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:47,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:47,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:07:47,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:49,900 INFO L129 PetriNetUnfolder]: 347/1098 cut-off events. [2021-12-28 03:07:49,900 INFO L130 PetriNetUnfolder]: For 3000/3000 co-relation queries the response was YES. [2021-12-28 03:07:49,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4264 conditions, 1098 events. 347/1098 cut-off events. For 3000/3000 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7229 event pairs, 15 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 4224. Up to 224 conditions per place. [2021-12-28 03:07:49,909 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 136 selfloop transitions, 230 changer transitions 34/441 dead transitions. [2021-12-28 03:07:49,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 441 transitions, 4005 flow [2021-12-28 03:07:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-28 03:07:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-12-28 03:07:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4115 transitions. [2021-12-28 03:07:49,916 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.637984496124031 [2021-12-28 03:07:49,916 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4115 transitions. [2021-12-28 03:07:49,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4115 transitions. [2021-12-28 03:07:49,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:49,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4115 transitions. [2021-12-28 03:07:49,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 54.86666666666667) internal successors, (4115), 75 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:49,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:49,933 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 86.0) internal successors, (6536), 76 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:49,933 INFO L186 Difference]: Start difference. First operand has 168 places, 203 transitions, 1379 flow. Second operand 75 states and 4115 transitions. [2021-12-28 03:07:49,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 441 transitions, 4005 flow [2021-12-28 03:07:49,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 441 transitions, 3689 flow, removed 158 selfloop flow, removed 14 redundant places. [2021-12-28 03:07:49,957 INFO L242 Difference]: Finished difference. Result has 230 places, 332 transitions, 3004 flow [2021-12-28 03:07:49,957 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=3004, PETRI_PLACES=230, PETRI_TRANSITIONS=332} [2021-12-28 03:07:49,958 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 154 predicate places. [2021-12-28 03:07:49,958 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 332 transitions, 3004 flow [2021-12-28 03:07:49,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:49,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:49,959 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 03:07:49,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:07:50,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:50,175 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1200502709, now seen corresponding path program 3 times [2021-12-28 03:07:50,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:50,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195161038] [2021-12-28 03:07:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:50,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:50,355 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 03:07:50,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195161038] [2021-12-28 03:07:50,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195161038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780206202] [2021-12-28 03:07:50,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:07:50,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:50,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:50,358 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 03:07:50,359 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 03:07:50,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-28 03:07:50,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:07:50,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:50,860 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 03:07:50,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:51,375 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 03:07:51,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780206202] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:51,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:51,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-28 03:07:51,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615048571] [2021-12-28 03:07:51,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:51,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-28 03:07:51,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-28 03:07:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-12-28 03:07:51,379 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:07:51,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 332 transitions, 3004 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:51,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:51,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:07:51,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:53,615 INFO L129 PetriNetUnfolder]: 544/1748 cut-off events. [2021-12-28 03:07:53,616 INFO L130 PetriNetUnfolder]: For 7138/7157 co-relation queries the response was YES. [2021-12-28 03:07:53,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 1748 events. 544/1748 cut-off events. For 7138/7157 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13271 event pairs, 31 based on Foata normal form. 9/1751 useless extension candidates. Maximal degree in co-relation 7890. Up to 483 conditions per place. [2021-12-28 03:07:53,634 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 255 selfloop transitions, 331 changer transitions 37/664 dead transitions. [2021-12-28 03:07:53,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 664 transitions, 7611 flow [2021-12-28 03:07:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-28 03:07:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-28 03:07:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3363 transitions. [2021-12-28 03:07:53,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6410598551277163 [2021-12-28 03:07:53,639 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3363 transitions. [2021-12-28 03:07:53,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3363 transitions. [2021-12-28 03:07:53,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:53,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3363 transitions. [2021-12-28 03:07:53,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 55.131147540983605) internal successors, (3363), 61 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:53,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:53,654 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:53,654 INFO L186 Difference]: Start difference. First operand has 230 places, 332 transitions, 3004 flow. Second operand 61 states and 3363 transitions. [2021-12-28 03:07:53,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 664 transitions, 7611 flow [2021-12-28 03:07:53,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 664 transitions, 7140 flow, removed 138 selfloop flow, removed 20 redundant places. [2021-12-28 03:07:53,708 INFO L242 Difference]: Finished difference. Result has 299 places, 542 transitions, 6409 flow [2021-12-28 03:07:53,709 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6409, PETRI_PLACES=299, PETRI_TRANSITIONS=542} [2021-12-28 03:07:53,711 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 223 predicate places. [2021-12-28 03:07:53,711 INFO L470 AbstractCegarLoop]: Abstraction has has 299 places, 542 transitions, 6409 flow [2021-12-28 03:07:53,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:53,712 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:53,712 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 03:07:53,732 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 03:07:53,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:53,927 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash -596230533, now seen corresponding path program 4 times [2021-12-28 03:07:53,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:53,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614552941] [2021-12-28 03:07:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:53,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:54,123 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 03:07:54,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614552941] [2021-12-28 03:07:54,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614552941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952808589] [2021-12-28 03:07:54,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 03:07:54,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:54,125 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 03:07:54,125 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 03:07:54,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 03:07:54,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:07:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:54,521 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 03:07:54,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:54,983 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 03:07:54,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952808589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:54,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:54,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-28 03:07:54,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503607443] [2021-12-28 03:07:54,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:54,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-28 03:07:54,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:54,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-28 03:07:54,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-12-28 03:07:54,987 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:07:54,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 542 transitions, 6409 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:54,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:54,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:07:54,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:07:57,586 INFO L129 PetriNetUnfolder]: 757/2442 cut-off events. [2021-12-28 03:07:57,586 INFO L130 PetriNetUnfolder]: For 18516/18567 co-relation queries the response was YES. [2021-12-28 03:07:57,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13333 conditions, 2442 events. 757/2442 cut-off events. For 18516/18567 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20302 event pairs, 59 based on Foata normal form. 11/2447 useless extension candidates. Maximal degree in co-relation 13254. Up to 786 conditions per place. [2021-12-28 03:07:57,613 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 342 selfloop transitions, 462 changer transitions 48/893 dead transitions. [2021-12-28 03:07:57,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 893 transitions, 12607 flow [2021-12-28 03:07:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-28 03:07:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-12-28 03:07:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3585 transitions. [2021-12-28 03:07:57,617 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413237924865832 [2021-12-28 03:07:57,617 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3585 transitions. [2021-12-28 03:07:57,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3585 transitions. [2021-12-28 03:07:57,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:07:57,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3585 transitions. [2021-12-28 03:07:57,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 55.15384615384615) internal successors, (3585), 65 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:57,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:57,630 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:57,630 INFO L186 Difference]: Start difference. First operand has 299 places, 542 transitions, 6409 flow. Second operand 65 states and 3585 transitions. [2021-12-28 03:07:57,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 893 transitions, 12607 flow [2021-12-28 03:07:57,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 893 transitions, 12293 flow, removed 152 selfloop flow, removed 9 redundant places. [2021-12-28 03:07:57,755 INFO L242 Difference]: Finished difference. Result has 387 places, 757 transitions, 11210 flow [2021-12-28 03:07:57,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6247, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11210, PETRI_PLACES=387, PETRI_TRANSITIONS=757} [2021-12-28 03:07:57,756 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 311 predicate places. [2021-12-28 03:07:57,757 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 757 transitions, 11210 flow [2021-12-28 03:07:57,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:57,758 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:07:57,759 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 03:07:57,779 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 03:07:57,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:57,968 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:07:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:07:57,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1699910441, now seen corresponding path program 5 times [2021-12-28 03:07:57,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:07:57,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011518558] [2021-12-28 03:07:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:07:57,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:07:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:07:58,146 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 03:07:58,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:07:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011518558] [2021-12-28 03:07:58,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011518558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:07:58,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541183192] [2021-12-28 03:07:58,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 03:07:58,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:07:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:07:58,148 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 03:07:58,149 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 03:07:58,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:07:58,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:07:58,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:07:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:07:58,551 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 03:07:58,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:07:59,060 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 03:07:59,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541183192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:07:59,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:07:59,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-28 03:07:59,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25684739] [2021-12-28 03:07:59,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:07:59,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:07:59,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:07:59,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:07:59,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:07:59,064 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:07:59,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 757 transitions, 11210 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:07:59,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:07:59,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:07:59,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:02,176 INFO L129 PetriNetUnfolder]: 792/2558 cut-off events. [2021-12-28 03:08:02,177 INFO L130 PetriNetUnfolder]: For 32950/32974 co-relation queries the response was YES. [2021-12-28 03:08:02,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16678 conditions, 2558 events. 792/2558 cut-off events. For 32950/32974 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21500 event pairs, 25 based on Foata normal form. 7/2563 useless extension candidates. Maximal degree in co-relation 16564. Up to 504 conditions per place. [2021-12-28 03:08:02,210 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 232 selfloop transitions, 633 changer transitions 38/944 dead transitions. [2021-12-28 03:08:02,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 944 transitions, 15762 flow [2021-12-28 03:08:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-28 03:08:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-28 03:08:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4176 transitions. [2021-12-28 03:08:02,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6389228886168911 [2021-12-28 03:08:02,215 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4176 transitions. [2021-12-28 03:08:02,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4176 transitions. [2021-12-28 03:08:02,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:02,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4176 transitions. [2021-12-28 03:08:02,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.94736842105263) internal successors, (4176), 76 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:02,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:02,227 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:02,228 INFO L186 Difference]: Start difference. First operand has 387 places, 757 transitions, 11210 flow. Second operand 76 states and 4176 transitions. [2021-12-28 03:08:02,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 944 transitions, 15762 flow [2021-12-28 03:08:02,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 944 transitions, 15182 flow, removed 285 selfloop flow, removed 8 redundant places. [2021-12-28 03:08:02,468 INFO L242 Difference]: Finished difference. Result has 456 places, 822 transitions, 13352 flow [2021-12-28 03:08:02,469 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=10830, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=13352, PETRI_PLACES=456, PETRI_TRANSITIONS=822} [2021-12-28 03:08:02,471 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 380 predicate places. [2021-12-28 03:08:02,472 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 822 transitions, 13352 flow [2021-12-28 03:08:02,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:02,472 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:02,472 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:08:02,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:08:02,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:02,706 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash 351983375, now seen corresponding path program 6 times [2021-12-28 03:08:02,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:02,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336057122] [2021-12-28 03:08:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:02,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:02,880 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 03:08:02,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:02,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336057122] [2021-12-28 03:08:02,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336057122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:02,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594697643] [2021-12-28 03:08:02,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 03:08:02,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:02,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:02,903 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 03:08:02,926 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 03:08:02,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-28 03:08:02,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:08:02,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:08:02,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:03,318 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 03:08:03,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:03,722 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 03:08:03,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594697643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:03,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:03,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-28 03:08:03,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871907637] [2021-12-28 03:08:03,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:03,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-28 03:08:03,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:03,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-28 03:08:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-12-28 03:08:03,727 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:08:03,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 822 transitions, 13352 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:03,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:03,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:08:03,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:06,573 INFO L129 PetriNetUnfolder]: 907/3024 cut-off events. [2021-12-28 03:08:06,573 INFO L130 PetriNetUnfolder]: For 48445/48480 co-relation queries the response was YES. [2021-12-28 03:08:06,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20947 conditions, 3024 events. 907/3024 cut-off events. For 48445/48480 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26809 event pairs, 100 based on Foata normal form. 5/3019 useless extension candidates. Maximal degree in co-relation 20828. Up to 1057 conditions per place. [2021-12-28 03:08:06,611 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 421 selfloop transitions, 567 changer transitions 50/1079 dead transitions. [2021-12-28 03:08:06,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1079 transitions, 19817 flow [2021-12-28 03:08:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-28 03:08:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-28 03:08:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3529 transitions. [2021-12-28 03:08:06,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6411700581395349 [2021-12-28 03:08:06,615 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3529 transitions. [2021-12-28 03:08:06,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3529 transitions. [2021-12-28 03:08:06,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:06,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3529 transitions. [2021-12-28 03:08:06,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.140625) internal successors, (3529), 64 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:06,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:06,625 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:06,625 INFO L186 Difference]: Start difference. First operand has 456 places, 822 transitions, 13352 flow. Second operand 64 states and 3529 transitions. [2021-12-28 03:08:06,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1079 transitions, 19817 flow [2021-12-28 03:08:06,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1079 transitions, 18789 flow, removed 174 selfloop flow, removed 40 redundant places. [2021-12-28 03:08:06,989 INFO L242 Difference]: Finished difference. Result has 497 places, 944 transitions, 17074 flow [2021-12-28 03:08:06,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=12570, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17074, PETRI_PLACES=497, PETRI_TRANSITIONS=944} [2021-12-28 03:08:06,991 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 421 predicate places. [2021-12-28 03:08:06,991 INFO L470 AbstractCegarLoop]: Abstraction has has 497 places, 944 transitions, 17074 flow [2021-12-28 03:08:06,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:06,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:06,991 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 03:08:07,008 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 03:08:07,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:07,209 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:07,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash -381220039, now seen corresponding path program 7 times [2021-12-28 03:08:07,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:07,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641378969] [2021-12-28 03:08:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:07,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:07,388 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 03:08:07,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641378969] [2021-12-28 03:08:07,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641378969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323199490] [2021-12-28 03:08:07,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 03:08:07,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:07,389 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 03:08:07,390 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 03:08:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:07,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:08:07,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:07,774 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 03:08:07,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:08,154 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 03:08:08,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323199490] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:08,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:08,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-28 03:08:08,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190238483] [2021-12-28 03:08:08,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:08,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:08:08,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:08:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:08:08,156 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:08:08,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 944 transitions, 17074 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:08,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:08,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:08:08,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:11,906 INFO L129 PetriNetUnfolder]: 1130/3900 cut-off events. [2021-12-28 03:08:11,906 INFO L130 PetriNetUnfolder]: For 95550/95585 co-relation queries the response was YES. [2021-12-28 03:08:11,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29889 conditions, 3900 events. 1130/3900 cut-off events. For 95550/95585 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 37369 event pairs, 45 based on Foata normal form. 14/3910 useless extension candidates. Maximal degree in co-relation 29750. Up to 766 conditions per place. [2021-12-28 03:08:11,960 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 446 selfloop transitions, 830 changer transitions 31/1348 dead transitions. [2021-12-28 03:08:11,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1348 transitions, 27580 flow [2021-12-28 03:08:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-28 03:08:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-12-28 03:08:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4259 transitions. [2021-12-28 03:08:11,964 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6431591664149804 [2021-12-28 03:08:11,964 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4259 transitions. [2021-12-28 03:08:11,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4259 transitions. [2021-12-28 03:08:11,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:11,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4259 transitions. [2021-12-28 03:08:11,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.311688311688314) internal successors, (4259), 77 states have internal predecessors, (4259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:11,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:11,977 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:11,977 INFO L186 Difference]: Start difference. First operand has 497 places, 944 transitions, 17074 flow. Second operand 77 states and 4259 transitions. [2021-12-28 03:08:11,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1348 transitions, 27580 flow [2021-12-28 03:08:12,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1348 transitions, 26329 flow, removed 525 selfloop flow, removed 28 redundant places. [2021-12-28 03:08:12,680 INFO L242 Difference]: Finished difference. Result has 562 places, 1159 transitions, 23296 flow [2021-12-28 03:08:12,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=16312, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=23296, PETRI_PLACES=562, PETRI_TRANSITIONS=1159} [2021-12-28 03:08:12,682 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 486 predicate places. [2021-12-28 03:08:12,682 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 1159 transitions, 23296 flow [2021-12-28 03:08:12,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:12,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:12,683 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 03:08:12,699 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 03:08:12,894 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,SelfDestructingSolverStorable9 [2021-12-28 03:08:12,894 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1766817381, now seen corresponding path program 8 times [2021-12-28 03:08:12,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:12,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834705084] [2021-12-28 03:08:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:12,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:13,065 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 03:08:13,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834705084] [2021-12-28 03:08:13,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834705084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125688387] [2021-12-28 03:08:13,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:08:13,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:13,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:13,067 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 03:08:13,068 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 03:08:13,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:08:13,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:08:13,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:08:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:13,495 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 03:08:13,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:13,994 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 03:08:13,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125688387] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:13,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:13,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-28 03:08:13,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016201154] [2021-12-28 03:08:13,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:13,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:08:13,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:08:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:08:13,997 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:08:13,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 1159 transitions, 23296 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:13,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:13,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:08:13,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:17,801 INFO L129 PetriNetUnfolder]: 1131/3759 cut-off events. [2021-12-28 03:08:17,802 INFO L130 PetriNetUnfolder]: For 115420/115455 co-relation queries the response was YES. [2021-12-28 03:08:17,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31640 conditions, 3759 events. 1131/3759 cut-off events. For 115420/115455 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35156 event pairs, 68 based on Foata normal form. 12/3764 useless extension candidates. Maximal degree in co-relation 31500. Up to 766 conditions per place. [2021-12-28 03:08:17,934 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 325 selfloop transitions, 876 changer transitions 46/1288 dead transitions. [2021-12-28 03:08:17,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1288 transitions, 27966 flow [2021-12-28 03:08:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-28 03:08:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-28 03:08:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4384 transitions. [2021-12-28 03:08:17,943 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2021-12-28 03:08:17,944 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4384 transitions. [2021-12-28 03:08:17,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4384 transitions. [2021-12-28 03:08:17,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:17,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4384 transitions. [2021-12-28 03:08:17,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 54.8) internal successors, (4384), 80 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:17,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:17,957 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:17,957 INFO L186 Difference]: Start difference. First operand has 562 places, 1159 transitions, 23296 flow. Second operand 80 states and 4384 transitions. [2021-12-28 03:08:17,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1288 transitions, 27966 flow [2021-12-28 03:08:18,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1288 transitions, 26972 flow, removed 325 selfloop flow, removed 32 redundant places. [2021-12-28 03:08:18,713 INFO L242 Difference]: Finished difference. Result has 610 places, 1153 transitions, 24222 flow [2021-12-28 03:08:18,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22503, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=868, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=24222, PETRI_PLACES=610, PETRI_TRANSITIONS=1153} [2021-12-28 03:08:18,715 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 534 predicate places. [2021-12-28 03:08:18,715 INFO L470 AbstractCegarLoop]: Abstraction has has 610 places, 1153 transitions, 24222 flow [2021-12-28 03:08:18,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:18,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:18,716 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 03:08:18,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-28 03:08:18,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:18,931 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:18,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1296723879, now seen corresponding path program 9 times [2021-12-28 03:08:18,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:18,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505677726] [2021-12-28 03:08:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:18,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:19,119 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 03:08:19,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:19,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505677726] [2021-12-28 03:08:19,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505677726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:19,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385399602] [2021-12-28 03:08:19,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:08:19,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:19,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:19,121 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 03:08:19,132 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 03:08:19,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-28 03:08:19,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:08:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:08:19,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:19,515 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 03:08:19,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:19,957 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 03:08:19,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385399602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:19,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:19,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-28 03:08:19,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967310324] [2021-12-28 03:08:19,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:19,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:08:19,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:08:19,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:08:19,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:08:19,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1153 transitions, 24222 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:19,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:19,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:08:19,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:23,096 INFO L129 PetriNetUnfolder]: 1389/4472 cut-off events. [2021-12-28 03:08:23,096 INFO L130 PetriNetUnfolder]: For 142331/142366 co-relation queries the response was YES. [2021-12-28 03:08:23,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39489 conditions, 4472 events. 1389/4472 cut-off events. For 142331/142366 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 43173 event pairs, 96 based on Foata normal form. 8/4464 useless extension candidates. Maximal degree in co-relation 39351. Up to 1427 conditions per place. [2021-12-28 03:08:23,163 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 450 selfloop transitions, 1094 changer transitions 23/1608 dead transitions. [2021-12-28 03:08:23,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1608 transitions, 37635 flow [2021-12-28 03:08:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-28 03:08:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-28 03:08:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3184 transitions. [2021-12-28 03:08:23,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6383319967923016 [2021-12-28 03:08:23,166 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3184 transitions. [2021-12-28 03:08:23,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3184 transitions. [2021-12-28 03:08:23,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:23,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3184 transitions. [2021-12-28 03:08:23,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.89655172413793) internal successors, (3184), 58 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:23,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:23,175 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:23,175 INFO L186 Difference]: Start difference. First operand has 610 places, 1153 transitions, 24222 flow. Second operand 58 states and 3184 transitions. [2021-12-28 03:08:23,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1608 transitions, 37635 flow [2021-12-28 03:08:24,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1608 transitions, 35381 flow, removed 57 selfloop flow, removed 69 redundant places. [2021-12-28 03:08:24,203 INFO L242 Difference]: Finished difference. Result has 600 places, 1498 transitions, 34421 flow [2021-12-28 03:08:24,205 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22585, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=34421, PETRI_PLACES=600, PETRI_TRANSITIONS=1498} [2021-12-28 03:08:24,206 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 524 predicate places. [2021-12-28 03:08:24,206 INFO L470 AbstractCegarLoop]: Abstraction has has 600 places, 1498 transitions, 34421 flow [2021-12-28 03:08:24,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:24,207 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:24,207 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 03:08:24,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:08:24,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-28 03:08:24,423 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1628944037, now seen corresponding path program 10 times [2021-12-28 03:08:24,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:24,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738029907] [2021-12-28 03:08:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:24,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:24,607 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 03:08:24,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:24,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738029907] [2021-12-28 03:08:24,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738029907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:24,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383946745] [2021-12-28 03:08:24,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 03:08:24,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:24,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:24,609 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:08:24,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:08:24,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 03:08:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:08:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:08:24,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:25,010 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 03:08:25,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:25,433 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 03:08:25,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383946745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:25,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:25,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-28 03:08:25,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527103226] [2021-12-28 03:08:25,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:25,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:08:25,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:08:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:08:25,436 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:08:25,437 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1498 transitions, 34421 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:25,437 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:25,437 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:08:25,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:29,888 INFO L129 PetriNetUnfolder]: 1542/5029 cut-off events. [2021-12-28 03:08:29,888 INFO L130 PetriNetUnfolder]: For 177983/178018 co-relation queries the response was YES. [2021-12-28 03:08:29,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45724 conditions, 5029 events. 1542/5029 cut-off events. For 177983/178018 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 50386 event pairs, 118 based on Foata normal form. 8/5019 useless extension candidates. Maximal degree in co-relation 45577. Up to 1425 conditions per place. [2021-12-28 03:08:29,963 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 426 selfloop transitions, 1299 changer transitions 53/1819 dead transitions. [2021-12-28 03:08:29,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1819 transitions, 45250 flow [2021-12-28 03:08:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-28 03:08:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-12-28 03:08:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3752 transitions. [2021-12-28 03:08:29,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6415868673050615 [2021-12-28 03:08:29,966 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3752 transitions. [2021-12-28 03:08:29,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3752 transitions. [2021-12-28 03:08:29,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:29,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3752 transitions. [2021-12-28 03:08:29,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.1764705882353) internal successors, (3752), 68 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:29,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:29,976 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:29,976 INFO L186 Difference]: Start difference. First operand has 600 places, 1498 transitions, 34421 flow. Second operand 68 states and 3752 transitions. [2021-12-28 03:08:29,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1819 transitions, 45250 flow [2021-12-28 03:08:31,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1819 transitions, 44072 flow, removed 409 selfloop flow, removed 21 redundant places. [2021-12-28 03:08:31,495 INFO L242 Difference]: Finished difference. Result has 662 places, 1680 transitions, 41710 flow [2021-12-28 03:08:31,496 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=33397, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=41710, PETRI_PLACES=662, PETRI_TRANSITIONS=1680} [2021-12-28 03:08:31,497 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 586 predicate places. [2021-12-28 03:08:31,497 INFO L470 AbstractCegarLoop]: Abstraction has has 662 places, 1680 transitions, 41710 flow [2021-12-28 03:08:31,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:31,498 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:31,498 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 03:08:31,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-28 03:08:31,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-28 03:08:31,711 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash -815631631, now seen corresponding path program 11 times [2021-12-28 03:08:31,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:31,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075558168] [2021-12-28 03:08:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:31,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:31,871 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 03:08:31,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:31,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075558168] [2021-12-28 03:08:31,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075558168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:31,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750512516] [2021-12-28 03:08:31,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 03:08:31,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:31,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:31,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:08:31,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:08:31,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:08:31,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:08:31,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:08:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:32,308 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 03:08:32,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:32,757 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 03:08:32,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750512516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:32,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:32,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-28 03:08:32,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375268330] [2021-12-28 03:08:32,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:32,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:08:32,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:32,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:08:32,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:08:32,760 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:08:32,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 1680 transitions, 41710 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:32,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:32,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:08:32,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:36,967 INFO L129 PetriNetUnfolder]: 1479/4684 cut-off events. [2021-12-28 03:08:36,968 INFO L130 PetriNetUnfolder]: For 177210/177234 co-relation queries the response was YES. [2021-12-28 03:08:37,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 4684 events. 1479/4684 cut-off events. For 177210/177234 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 45371 event pairs, 101 based on Foata normal form. 7/4685 useless extension candidates. Maximal degree in co-relation 44739. Up to 1349 conditions per place. [2021-12-28 03:08:37,043 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 543 selfloop transitions, 1161 changer transitions 26/1771 dead transitions. [2021-12-28 03:08:37,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1771 transitions, 46862 flow [2021-12-28 03:08:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-28 03:08:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-12-28 03:08:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3405 transitions. [2021-12-28 03:08:37,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6385971492873218 [2021-12-28 03:08:37,045 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3405 transitions. [2021-12-28 03:08:37,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3405 transitions. [2021-12-28 03:08:37,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:37,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3405 transitions. [2021-12-28 03:08:37,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 54.91935483870968) internal successors, (3405), 62 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:37,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:37,053 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:37,053 INFO L186 Difference]: Start difference. First operand has 662 places, 1680 transitions, 41710 flow. Second operand 62 states and 3405 transitions. [2021-12-28 03:08:37,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1771 transitions, 46862 flow [2021-12-28 03:08:38,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1771 transitions, 45530 flow, removed 278 selfloop flow, removed 37 redundant places. [2021-12-28 03:08:38,658 INFO L242 Difference]: Finished difference. Result has 690 places, 1692 transitions, 43205 flow [2021-12-28 03:08:38,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=40459, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=43205, PETRI_PLACES=690, PETRI_TRANSITIONS=1692} [2021-12-28 03:08:38,660 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 614 predicate places. [2021-12-28 03:08:38,660 INFO L470 AbstractCegarLoop]: Abstraction has has 690 places, 1692 transitions, 43205 flow [2021-12-28 03:08:38,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:38,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:38,660 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 03:08:38,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 03:08:38,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 03:08:38,861 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:38,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1921340575, now seen corresponding path program 12 times [2021-12-28 03:08:38,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:38,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295419331] [2021-12-28 03:08:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:38,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:39,022 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 03:08:39,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:39,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295419331] [2021-12-28 03:08:39,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295419331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:08:39,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560569147] [2021-12-28 03:08:39,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 03:08:39,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:08:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:39,024 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:08:39,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 03:08:39,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-28 03:08:39,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:08:39,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 03:08:39,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:08:39,490 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 03:08:39,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:08:39,889 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 03:08:39,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560569147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:08:39,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:08:39,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-28 03:08:39,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362946426] [2021-12-28 03:08:39,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:08:39,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:08:39,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:08:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:08:39,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-28 03:08:39,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1692 transitions, 43205 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:39,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:39,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-28 03:08:39,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:43,316 INFO L129 PetriNetUnfolder]: 1561/4845 cut-off events. [2021-12-28 03:08:43,316 INFO L130 PetriNetUnfolder]: For 189682/189706 co-relation queries the response was YES. [2021-12-28 03:08:43,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48552 conditions, 4845 events. 1561/4845 cut-off events. For 189682/189706 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 46770 event pairs, 116 based on Foata normal form. 5/4837 useless extension candidates. Maximal degree in co-relation 48390. Up to 2011 conditions per place. [2021-12-28 03:08:43,409 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 754 selfloop transitions, 1114 changer transitions 14/1923 dead transitions. [2021-12-28 03:08:43,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1923 transitions, 52668 flow [2021-12-28 03:08:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-28 03:08:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-28 03:08:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2211 transitions. [2021-12-28 03:08:43,411 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6427325581395349 [2021-12-28 03:08:43,412 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2211 transitions. [2021-12-28 03:08:43,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2211 transitions. [2021-12-28 03:08:43,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:43,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2211 transitions. [2021-12-28 03:08:43,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.275) internal successors, (2211), 40 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:43,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:43,417 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:43,417 INFO L186 Difference]: Start difference. First operand has 690 places, 1692 transitions, 43205 flow. Second operand 40 states and 2211 transitions. [2021-12-28 03:08:43,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1923 transitions, 52668 flow