./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-bad-commit-2.wvr-bad.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 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:09:29,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:09:29,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:09:29,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:09:29,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:09:29,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:09:29,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:09:29,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:09:29,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:09:29,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:09:29,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:09:29,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:09:29,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:09:29,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:09:29,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:09:29,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:09:29,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:09:29,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:09:29,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:09:29,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:09:29,161 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:09:29,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:09:29,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:09:29,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:09:29,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:09:29,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:09:29,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:09:29,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:09:29,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:09:29,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:09:29,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:09:29,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:09:29,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:09:29,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:09:29,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:09:29,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:09:29,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:09:29,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:09:29,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:09:29,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:09:29,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:09:29,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:09:29,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:09:29,198 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:09:29,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:09:29,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:09:29,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:09:29,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:09:29,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:09:29,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:09:29,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:09:29,200 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:09:29,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:09:29,201 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:09:29,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:09:29,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:09:29,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:09:29,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:09:29,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:09:29,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:09:29,202 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:09:29,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:09:29,203 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:09:29,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:09:29,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:09:29,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:09:29,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:09:29,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:09:29,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:09:29,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:09:29,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:09:29,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:09:29,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:09:29,205 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:09:29,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:09:29,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:09:29,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 [2022-07-13 22:09:29,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:09:29,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:09:29,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:09:29,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:09:29,397 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:09:29,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2022-07-13 22:09:29,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a36cbd5/7d2e882de41f4d398031e4092e4813e7/FLAG0332884bb [2022-07-13 22:09:29,828 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:09:29,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2022-07-13 22:09:29,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a36cbd5/7d2e882de41f4d398031e4092e4813e7/FLAG0332884bb [2022-07-13 22:09:29,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a36cbd5/7d2e882de41f4d398031e4092e4813e7 [2022-07-13 22:09:29,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:09:29,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:09:29,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:09:29,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:09:29,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:09:29,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:29" (1/1) ... [2022-07-13 22:09:29,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd7cdf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:29, skipping insertion in model container [2022-07-13 22:09:29,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:29" (1/1) ... [2022-07-13 22:09:29,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:09:29,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:09:30,050 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-bad-commit-2.wvr-bad.c[6687,6700] [2022-07-13 22:09:30,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:09:30,069 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:09:30,091 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-bad-commit-2.wvr-bad.c[6687,6700] [2022-07-13 22:09:30,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:09:30,115 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:09:30,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30 WrapperNode [2022-07-13 22:09:30,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:09:30,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:09:30,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:09:30,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:09:30,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,164 INFO L137 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 460 [2022-07-13 22:09:30,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:09:30,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:09:30,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:09:30,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:09:30,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:09:30,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:09:30,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:09:30,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:09:30,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (1/1) ... [2022-07-13 22:09:30,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:09:30,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:30,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:09:30,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:09:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:09:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:09:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:09:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:09:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:09:30,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:09:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:09:30,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:09:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:09:30,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:09:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-13 22:09:30,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-13 22:09:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:09:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:09:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:09:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:09:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:09:30,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:09:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:09:30,259 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:09:30,359 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:09:30,360 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:09:30,783 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:09:30,916 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:09:30,916 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-13 22:09:30,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:30 BoogieIcfgContainer [2022-07-13 22:09:30,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:09:30,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:09:30,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:09:30,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:09:30,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:09:29" (1/3) ... [2022-07-13 22:09:30,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611049c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:30, skipping insertion in model container [2022-07-13 22:09:30,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:30" (2/3) ... [2022-07-13 22:09:30,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611049c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:30, skipping insertion in model container [2022-07-13 22:09:30,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:30" (3/3) ... [2022-07-13 22:09:30,926 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2022-07-13 22:09:30,931 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:09:30,937 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:09:30,938 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:09:30,938 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:09:31,004 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 22:09:31,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 332 places, 356 transitions, 744 flow [2022-07-13 22:09:31,133 INFO L129 PetriNetUnfolder]: 37/352 cut-off events. [2022-07-13 22:09:31,136 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:09:31,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 352 events. 37/352 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 239 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 308. Up to 8 conditions per place. [2022-07-13 22:09:31,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 356 transitions, 744 flow [2022-07-13 22:09:31,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 315 places, 339 transitions, 702 flow [2022-07-13 22:09:31,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:09:31,168 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5677e2cf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@58951370 [2022-07-13 22:09:31,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 22:09:31,205 INFO L129 PetriNetUnfolder]: 37/338 cut-off events. [2022-07-13 22:09:31,205 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:09:31,206 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:31,206 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:31,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2078507532, now seen corresponding path program 1 times [2022-07-13 22:09:31,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:31,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228850367] [2022-07-13 22:09:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:31,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:31,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:31,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228850367] [2022-07-13 22:09:31,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228850367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:31,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:31,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:09:31,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656332440] [2022-07-13 22:09:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:31,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:09:31,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:09:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:09:31,518 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 356 [2022-07-13 22:09:31,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 339 transitions, 702 flow. Second operand has 2 states, 2 states have (on average 325.0) internal successors, (650), 2 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:31,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:31,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 356 [2022-07-13 22:09:31,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:31,616 INFO L129 PetriNetUnfolder]: 56/358 cut-off events. [2022-07-13 22:09:31,616 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 22:09:31,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 358 events. 56/358 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 264 event pairs, 0 based on Foata normal form. 29/355 useless extension candidates. Maximal degree in co-relation 334. Up to 57 conditions per place. [2022-07-13 22:09:31,622 INFO L132 encePairwiseOnDemand]: 339/356 looper letters, 20 selfloop transitions, 0 changer transitions 9/322 dead transitions. [2022-07-13 22:09:31,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 322 transitions, 708 flow [2022-07-13 22:09:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:09:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:09:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 673 transitions. [2022-07-13 22:09:31,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9452247191011236 [2022-07-13 22:09:31,638 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 673 transitions. [2022-07-13 22:09:31,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 673 transitions. [2022-07-13 22:09:31,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:31,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 673 transitions. [2022-07-13 22:09:31,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 336.5) internal successors, (673), 2 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:31,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:31,655 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:31,657 INFO L186 Difference]: Start difference. First operand has 315 places, 339 transitions, 702 flow. Second operand 2 states and 673 transitions. [2022-07-13 22:09:31,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 322 transitions, 708 flow [2022-07-13 22:09:31,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 322 transitions, 692 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-13 22:09:31,671 INFO L242 Difference]: Finished difference. Result has 308 places, 313 transitions, 634 flow [2022-07-13 22:09:31,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=634, PETRI_PLACES=308, PETRI_TRANSITIONS=313} [2022-07-13 22:09:31,680 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -7 predicate places. [2022-07-13 22:09:31,681 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 313 transitions, 634 flow [2022-07-13 22:09:31,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.0) internal successors, (650), 2 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:31,681 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:31,682 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:31,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:09:31,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:31,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1859772742, now seen corresponding path program 1 times [2022-07-13 22:09:31,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:31,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226579785] [2022-07-13 22:09:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:31,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:31,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226579785] [2022-07-13 22:09:31,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226579785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:31,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:31,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:09:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494200368] [2022-07-13 22:09:31,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:31,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:09:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:09:31,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:09:31,970 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 356 [2022-07-13 22:09:31,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 313 transitions, 634 flow. Second operand has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:31,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:31,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 356 [2022-07-13 22:09:31,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:32,124 INFO L129 PetriNetUnfolder]: 107/476 cut-off events. [2022-07-13 22:09:32,124 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 22:09:32,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 476 events. 107/476 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 704 event pairs, 0 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 635. Up to 85 conditions per place. [2022-07-13 22:09:32,128 INFO L132 encePairwiseOnDemand]: 346/356 looper letters, 69 selfloop transitions, 7 changer transitions 4/335 dead transitions. [2022-07-13 22:09:32,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 335 transitions, 845 flow [2022-07-13 22:09:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:09:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:09:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1436 transitions. [2022-07-13 22:09:32,131 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8067415730337079 [2022-07-13 22:09:32,131 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1436 transitions. [2022-07-13 22:09:32,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1436 transitions. [2022-07-13 22:09:32,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:32,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1436 transitions. [2022-07-13 22:09:32,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 287.2) internal successors, (1436), 5 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,138 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,138 INFO L186 Difference]: Start difference. First operand has 308 places, 313 transitions, 634 flow. Second operand 5 states and 1436 transitions. [2022-07-13 22:09:32,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 335 transitions, 845 flow [2022-07-13 22:09:32,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 335 transitions, 845 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:09:32,152 INFO L242 Difference]: Finished difference. Result has 306 places, 319 transitions, 685 flow [2022-07-13 22:09:32,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=685, PETRI_PLACES=306, PETRI_TRANSITIONS=319} [2022-07-13 22:09:32,153 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -9 predicate places. [2022-07-13 22:09:32,153 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 319 transitions, 685 flow [2022-07-13 22:09:32,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,154 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:32,154 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:32,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:09:32,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash -739310667, now seen corresponding path program 1 times [2022-07-13 22:09:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:32,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888769281] [2022-07-13 22:09:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:32,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:32,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:32,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888769281] [2022-07-13 22:09:32,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888769281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:32,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:32,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:09:32,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533709982] [2022-07-13 22:09:32,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:32,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:09:32,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:32,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:09:32,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:09:32,351 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 356 [2022-07-13 22:09:32,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 319 transitions, 685 flow. Second operand has 3 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:32,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 356 [2022-07-13 22:09:32,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:32,467 INFO L129 PetriNetUnfolder]: 171/648 cut-off events. [2022-07-13 22:09:32,467 INFO L130 PetriNetUnfolder]: For 86/90 co-relation queries the response was YES. [2022-07-13 22:09:32,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 648 events. 171/648 cut-off events. For 86/90 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1483 event pairs, 3 based on Foata normal form. 19/590 useless extension candidates. Maximal degree in co-relation 950. Up to 124 conditions per place. [2022-07-13 22:09:32,473 INFO L132 encePairwiseOnDemand]: 345/356 looper letters, 43 selfloop transitions, 8 changer transitions 0/337 dead transitions. [2022-07-13 22:09:32,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 337 transitions, 844 flow [2022-07-13 22:09:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:09:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:09:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 978 transitions. [2022-07-13 22:09:32,475 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9157303370786517 [2022-07-13 22:09:32,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 978 transitions. [2022-07-13 22:09:32,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 978 transitions. [2022-07-13 22:09:32,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:32,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 978 transitions. [2022-07-13 22:09:32,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,479 INFO L186 Difference]: Start difference. First operand has 306 places, 319 transitions, 685 flow. Second operand 3 states and 978 transitions. [2022-07-13 22:09:32,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 337 transitions, 844 flow [2022-07-13 22:09:32,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 337 transitions, 830 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 22:09:32,484 INFO L242 Difference]: Finished difference. Result has 304 places, 322 transitions, 722 flow [2022-07-13 22:09:32,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=722, PETRI_PLACES=304, PETRI_TRANSITIONS=322} [2022-07-13 22:09:32,485 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -11 predicate places. [2022-07-13 22:09:32,485 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 322 transitions, 722 flow [2022-07-13 22:09:32,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,486 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:32,486 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:32,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:09:32,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:32,486 INFO L85 PathProgramCache]: Analyzing trace with hash -827331275, now seen corresponding path program 1 times [2022-07-13 22:09:32,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:32,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499737937] [2022-07-13 22:09:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:32,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:32,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:32,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499737937] [2022-07-13 22:09:32,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499737937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:32,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:32,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:09:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126263915] [2022-07-13 22:09:32,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:32,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:09:32,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:09:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:09:32,581 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 356 [2022-07-13 22:09:32,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 322 transitions, 722 flow. Second operand has 3 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:32,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 356 [2022-07-13 22:09:32,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:32,736 INFO L129 PetriNetUnfolder]: 317/1067 cut-off events. [2022-07-13 22:09:32,736 INFO L130 PetriNetUnfolder]: For 274/286 co-relation queries the response was YES. [2022-07-13 22:09:32,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1067 events. 317/1067 cut-off events. For 274/286 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4024 event pairs, 15 based on Foata normal form. 15/926 useless extension candidates. Maximal degree in co-relation 1731. Up to 194 conditions per place. [2022-07-13 22:09:32,749 INFO L132 encePairwiseOnDemand]: 353/356 looper letters, 57 selfloop transitions, 2 changer transitions 0/348 dead transitions. [2022-07-13 22:09:32,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 348 transitions, 946 flow [2022-07-13 22:09:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:09:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:09:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2022-07-13 22:09:32,752 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9222846441947565 [2022-07-13 22:09:32,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 985 transitions. [2022-07-13 22:09:32,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 985 transitions. [2022-07-13 22:09:32,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:32,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 985 transitions. [2022-07-13 22:09:32,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,756 INFO L186 Difference]: Start difference. First operand has 304 places, 322 transitions, 722 flow. Second operand 3 states and 985 transitions. [2022-07-13 22:09:32,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 348 transitions, 946 flow [2022-07-13 22:09:32,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 348 transitions, 935 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:09:32,761 INFO L242 Difference]: Finished difference. Result has 306 places, 323 transitions, 728 flow [2022-07-13 22:09:32,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=728, PETRI_PLACES=306, PETRI_TRANSITIONS=323} [2022-07-13 22:09:32,762 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -9 predicate places. [2022-07-13 22:09:32,763 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 323 transitions, 728 flow [2022-07-13 22:09:32,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:32,764 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:32,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:09:32,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:32,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1704022611, now seen corresponding path program 1 times [2022-07-13 22:09:32,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:32,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781292504] [2022-07-13 22:09:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:32,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:32,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:32,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781292504] [2022-07-13 22:09:32,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781292504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:32,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:32,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:09:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707138274] [2022-07-13 22:09:32,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:09:32,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:09:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:09:32,898 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 356 [2022-07-13 22:09:32,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 323 transitions, 728 flow. Second operand has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:32,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:32,899 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 356 [2022-07-13 22:09:32,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:33,158 INFO L129 PetriNetUnfolder]: 579/1866 cut-off events. [2022-07-13 22:09:33,158 INFO L130 PetriNetUnfolder]: For 684/700 co-relation queries the response was YES. [2022-07-13 22:09:33,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 1866 events. 579/1866 cut-off events. For 684/700 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 10102 event pairs, 29 based on Foata normal form. 33/1569 useless extension candidates. Maximal degree in co-relation 3119. Up to 362 conditions per place. [2022-07-13 22:09:33,179 INFO L132 encePairwiseOnDemand]: 349/356 looper letters, 58 selfloop transitions, 6 changer transitions 0/350 dead transitions. [2022-07-13 22:09:33,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 350 transitions, 970 flow [2022-07-13 22:09:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:09:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:09:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1290 transitions. [2022-07-13 22:09:33,182 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9058988764044944 [2022-07-13 22:09:33,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1290 transitions. [2022-07-13 22:09:33,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1290 transitions. [2022-07-13 22:09:33,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:33,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1290 transitions. [2022-07-13 22:09:33,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,187 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,188 INFO L186 Difference]: Start difference. First operand has 306 places, 323 transitions, 728 flow. Second operand 4 states and 1290 transitions. [2022-07-13 22:09:33,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 350 transitions, 970 flow [2022-07-13 22:09:33,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 350 transitions, 967 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:09:33,197 INFO L242 Difference]: Finished difference. Result has 309 places, 324 transitions, 748 flow [2022-07-13 22:09:33,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=748, PETRI_PLACES=309, PETRI_TRANSITIONS=324} [2022-07-13 22:09:33,199 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -6 predicate places. [2022-07-13 22:09:33,199 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 324 transitions, 748 flow [2022-07-13 22:09:33,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,200 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:33,200 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:33,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:09:33,201 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:33,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1675148344, now seen corresponding path program 1 times [2022-07-13 22:09:33,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:33,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996851080] [2022-07-13 22:09:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:33,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:33,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:33,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996851080] [2022-07-13 22:09:33,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996851080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:33,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:33,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:09:33,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377396530] [2022-07-13 22:09:33,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:33,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:09:33,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:09:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:09:33,277 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 356 [2022-07-13 22:09:33,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 324 transitions, 748 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:33,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 356 [2022-07-13 22:09:33,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:33,701 INFO L129 PetriNetUnfolder]: 1212/3067 cut-off events. [2022-07-13 22:09:33,702 INFO L130 PetriNetUnfolder]: For 1598/1724 co-relation queries the response was YES. [2022-07-13 22:09:33,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5825 conditions, 3067 events. 1212/3067 cut-off events. For 1598/1724 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 18615 event pairs, 155 based on Foata normal form. 27/2526 useless extension candidates. Maximal degree in co-relation 5817. Up to 847 conditions per place. [2022-07-13 22:09:33,739 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 52 selfloop transitions, 6 changer transitions 0/346 dead transitions. [2022-07-13 22:09:33,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 346 transitions, 965 flow [2022-07-13 22:09:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:09:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:09:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2022-07-13 22:09:33,742 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9176029962546817 [2022-07-13 22:09:33,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2022-07-13 22:09:33,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2022-07-13 22:09:33,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:33,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2022-07-13 22:09:33,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,746 INFO L186 Difference]: Start difference. First operand has 309 places, 324 transitions, 748 flow. Second operand 3 states and 980 transitions. [2022-07-13 22:09:33,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 346 transitions, 965 flow [2022-07-13 22:09:33,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 346 transitions, 954 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:09:33,751 INFO L242 Difference]: Finished difference. Result has 311 places, 325 transitions, 768 flow [2022-07-13 22:09:33,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=768, PETRI_PLACES=311, PETRI_TRANSITIONS=325} [2022-07-13 22:09:33,752 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, -4 predicate places. [2022-07-13 22:09:33,752 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 325 transitions, 768 flow [2022-07-13 22:09:33,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,753 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:33,753 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:33,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:09:33,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash 416774542, now seen corresponding path program 1 times [2022-07-13 22:09:33,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:33,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921505688] [2022-07-13 22:09:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:33,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:33,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921505688] [2022-07-13 22:09:33,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921505688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:33,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:33,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:09:33,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619333182] [2022-07-13 22:09:33,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:09:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:09:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:09:33,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 356 [2022-07-13 22:09:33,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 325 transitions, 768 flow. Second operand has 6 states, 6 states have (on average 275.3333333333333) internal successors, (1652), 6 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:33,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:33,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 356 [2022-07-13 22:09:33,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:34,332 INFO L129 PetriNetUnfolder]: 807/2922 cut-off events. [2022-07-13 22:09:34,333 INFO L130 PetriNetUnfolder]: For 1988/2177 co-relation queries the response was YES. [2022-07-13 22:09:34,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5136 conditions, 2922 events. 807/2922 cut-off events. For 1988/2177 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 18591 event pairs, 117 based on Foata normal form. 95/2492 useless extension candidates. Maximal degree in co-relation 5127. Up to 794 conditions per place. [2022-07-13 22:09:34,361 INFO L132 encePairwiseOnDemand]: 344/356 looper letters, 128 selfloop transitions, 11 changer transitions 0/383 dead transitions. [2022-07-13 22:09:34,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 383 transitions, 1194 flow [2022-07-13 22:09:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:09:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:09:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2539 transitions. [2022-07-13 22:09:34,366 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924469413233458 [2022-07-13 22:09:34,366 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2539 transitions. [2022-07-13 22:09:34,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2539 transitions. [2022-07-13 22:09:34,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:34,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2539 transitions. [2022-07-13 22:09:34,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 282.1111111111111) internal successors, (2539), 9 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:34,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:34,375 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:34,375 INFO L186 Difference]: Start difference. First operand has 311 places, 325 transitions, 768 flow. Second operand 9 states and 2539 transitions. [2022-07-13 22:09:34,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 383 transitions, 1194 flow [2022-07-13 22:09:34,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 383 transitions, 1182 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:09:34,381 INFO L242 Difference]: Finished difference. Result has 319 places, 329 transitions, 802 flow [2022-07-13 22:09:34,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=802, PETRI_PLACES=319, PETRI_TRANSITIONS=329} [2022-07-13 22:09:34,382 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 4 predicate places. [2022-07-13 22:09:34,383 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 329 transitions, 802 flow [2022-07-13 22:09:34,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 275.3333333333333) internal successors, (1652), 6 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:34,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:34,385 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:34,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:09:34,385 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:34,386 INFO L85 PathProgramCache]: Analyzing trace with hash -747523834, now seen corresponding path program 1 times [2022-07-13 22:09:34,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:34,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986660322] [2022-07-13 22:09:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:34,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:34,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:34,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986660322] [2022-07-13 22:09:34,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986660322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:34,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:34,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:09:34,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602528011] [2022-07-13 22:09:34,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:34,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:09:34,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:34,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:09:34,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:09:34,445 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 356 [2022-07-13 22:09:34,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 329 transitions, 802 flow. Second operand has 3 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:34,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:34,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 356 [2022-07-13 22:09:34,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:34,811 INFO L129 PetriNetUnfolder]: 1134/2460 cut-off events. [2022-07-13 22:09:34,812 INFO L130 PetriNetUnfolder]: For 2043/2210 co-relation queries the response was YES. [2022-07-13 22:09:34,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5575 conditions, 2460 events. 1134/2460 cut-off events. For 2043/2210 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10131 event pairs, 43 based on Foata normal form. 2/2251 useless extension candidates. Maximal degree in co-relation 5564. Up to 1047 conditions per place. [2022-07-13 22:09:34,844 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 48 selfloop transitions, 5 changer transitions 3/338 dead transitions. [2022-07-13 22:09:34,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 338 transitions, 936 flow [2022-07-13 22:09:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:09:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:09:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2022-07-13 22:09:34,847 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.900749063670412 [2022-07-13 22:09:34,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2022-07-13 22:09:34,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2022-07-13 22:09:34,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:34,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2022-07-13 22:09:34,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:34,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:34,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:34,851 INFO L186 Difference]: Start difference. First operand has 319 places, 329 transitions, 802 flow. Second operand 3 states and 962 transitions. [2022-07-13 22:09:34,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 338 transitions, 936 flow [2022-07-13 22:09:34,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 338 transitions, 927 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 22:09:34,857 INFO L242 Difference]: Finished difference. Result has 320 places, 323 transitions, 782 flow [2022-07-13 22:09:34,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=782, PETRI_PLACES=320, PETRI_TRANSITIONS=323} [2022-07-13 22:09:34,859 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 5 predicate places. [2022-07-13 22:09:34,859 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 323 transitions, 782 flow [2022-07-13 22:09:34,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:34,860 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:34,860 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:34,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:09:34,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:34,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1727903045, now seen corresponding path program 1 times [2022-07-13 22:09:34,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:34,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771180842] [2022-07-13 22:09:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:34,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:35,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:35,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771180842] [2022-07-13 22:09:35,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771180842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:35,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262724196] [2022-07-13 22:09:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:35,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:35,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:35,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:09:35,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:09:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 22:09:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:36,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 22:09:38,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:38,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:38,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:38,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:38,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:40,096 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:09:40,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 56 [2022-07-13 22:09:40,112 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:09:40,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1606 treesize of output 1549 [2022-07-13 22:09:40,124 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:09:40,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1542 treesize of output 1158 [2022-07-13 22:09:40,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:09:40,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 579 treesize of output 531 [2022-07-13 22:09:40,147 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:09:40,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1110 treesize of output 918 [2022-07-13 22:09:40,162 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:09:40,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 918 treesize of output 822 [2022-07-13 22:09:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:41,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262724196] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:09:41,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:09:41,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30, 24] total 65 [2022-07-13 22:09:41,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895090911] [2022-07-13 22:09:41,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:09:41,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-13 22:09:41,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-13 22:09:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=715, Invalid=3343, Unknown=102, NotChecked=0, Total=4160 [2022-07-13 22:09:41,328 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 356 [2022-07-13 22:09:41,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 323 transitions, 782 flow. Second operand has 65 states, 65 states have (on average 177.2153846153846) internal successors, (11519), 65 states have internal predecessors, (11519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:41,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:41,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 356 [2022-07-13 22:09:41,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:45,586 INFO L129 PetriNetUnfolder]: 3097/8217 cut-off events. [2022-07-13 22:09:45,586 INFO L130 PetriNetUnfolder]: For 7282/7910 co-relation queries the response was YES. [2022-07-13 22:09:45,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17972 conditions, 8217 events. 3097/8217 cut-off events. For 7282/7910 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 62967 event pairs, 51 based on Foata normal form. 38/7282 useless extension candidates. Maximal degree in co-relation 17960. Up to 1896 conditions per place. [2022-07-13 22:09:45,674 INFO L132 encePairwiseOnDemand]: 305/356 looper letters, 423 selfloop transitions, 86 changer transitions 13/688 dead transitions. [2022-07-13 22:09:45,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 688 transitions, 2975 flow [2022-07-13 22:09:45,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 22:09:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-13 22:09:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 9451 transitions. [2022-07-13 22:09:45,691 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5105337078651685 [2022-07-13 22:09:45,691 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 9451 transitions. [2022-07-13 22:09:45,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 9451 transitions. [2022-07-13 22:09:45,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:45,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 9451 transitions. [2022-07-13 22:09:45,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 181.75) internal successors, (9451), 52 states have internal predecessors, (9451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 356.0) internal successors, (18868), 53 states have internal predecessors, (18868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,744 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 356.0) internal successors, (18868), 53 states have internal predecessors, (18868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,745 INFO L186 Difference]: Start difference. First operand has 320 places, 323 transitions, 782 flow. Second operand 52 states and 9451 transitions. [2022-07-13 22:09:45,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 688 transitions, 2975 flow [2022-07-13 22:09:45,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 688 transitions, 2926 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:09:45,759 INFO L242 Difference]: Finished difference. Result has 388 places, 389 transitions, 1449 flow [2022-07-13 22:09:45,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1449, PETRI_PLACES=388, PETRI_TRANSITIONS=389} [2022-07-13 22:09:45,761 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 73 predicate places. [2022-07-13 22:09:45,761 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 389 transitions, 1449 flow [2022-07-13 22:09:45,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 177.2153846153846) internal successors, (11519), 65 states have internal predecessors, (11519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:45,764 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:45,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 22:09:45,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:45,976 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1522801112, now seen corresponding path program 1 times [2022-07-13 22:09:45,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:45,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049668502] [2022-07-13 22:09:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:45,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:09:46,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:46,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049668502] [2022-07-13 22:09:46,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049668502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:46,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:46,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:09:46,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238328984] [2022-07-13 22:09:46,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:46,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:09:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:09:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:09:46,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 356 [2022-07-13 22:09:46,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 389 transitions, 1449 flow. Second operand has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:46,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 356 [2022-07-13 22:09:46,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:47,662 INFO L129 PetriNetUnfolder]: 3763/9828 cut-off events. [2022-07-13 22:09:47,662 INFO L130 PetriNetUnfolder]: For 23968/25350 co-relation queries the response was YES. [2022-07-13 22:09:47,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26056 conditions, 9828 events. 3763/9828 cut-off events. For 23968/25350 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 82468 event pairs, 366 based on Foata normal form. 27/8398 useless extension candidates. Maximal degree in co-relation 26022. Up to 3094 conditions per place. [2022-07-13 22:09:47,831 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 78 selfloop transitions, 6 changer transitions 0/399 dead transitions. [2022-07-13 22:09:47,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 399 transitions, 1660 flow [2022-07-13 22:09:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:09:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:09:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-07-13 22:09:47,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9185393258426966 [2022-07-13 22:09:47,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-07-13 22:09:47,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-07-13 22:09:47,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:47,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-07-13 22:09:47,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:47,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:47,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:47,841 INFO L186 Difference]: Start difference. First operand has 388 places, 389 transitions, 1449 flow. Second operand 3 states and 981 transitions. [2022-07-13 22:09:47,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 399 transitions, 1660 flow [2022-07-13 22:09:47,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 399 transitions, 1586 flow, removed 21 selfloop flow, removed 20 redundant places. [2022-07-13 22:09:47,863 INFO L242 Difference]: Finished difference. Result has 368 places, 382 transitions, 1337 flow [2022-07-13 22:09:47,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1337, PETRI_PLACES=368, PETRI_TRANSITIONS=382} [2022-07-13 22:09:47,865 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 53 predicate places. [2022-07-13 22:09:47,865 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 382 transitions, 1337 flow [2022-07-13 22:09:47,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:47,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:47,866 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:47,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 22:09:47,866 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2014399, now seen corresponding path program 1 times [2022-07-13 22:09:47,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:47,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281574382] [2022-07-13 22:09:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:47,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:09:47,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:47,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281574382] [2022-07-13 22:09:47,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281574382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:47,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:47,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:09:47,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270313716] [2022-07-13 22:09:47,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:47,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:09:47,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:47,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:09:47,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:09:47,918 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 356 [2022-07-13 22:09:47,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 382 transitions, 1337 flow. Second operand has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:47,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:47,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 356 [2022-07-13 22:09:47,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:49,598 INFO L129 PetriNetUnfolder]: 3682/10359 cut-off events. [2022-07-13 22:09:49,598 INFO L130 PetriNetUnfolder]: For 27950/30229 co-relation queries the response was YES. [2022-07-13 22:09:49,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27354 conditions, 10359 events. 3682/10359 cut-off events. For 27950/30229 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 94298 event pairs, 566 based on Foata normal form. 19/9120 useless extension candidates. Maximal degree in co-relation 27322. Up to 3005 conditions per place. [2022-07-13 22:09:49,707 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 62 selfloop transitions, 6 changer transitions 0/383 dead transitions. [2022-07-13 22:09:49,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 383 transitions, 1453 flow [2022-07-13 22:09:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:09:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:09:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2022-07-13 22:09:49,710 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9176029962546817 [2022-07-13 22:09:49,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2022-07-13 22:09:49,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2022-07-13 22:09:49,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:49,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2022-07-13 22:09:49,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:49,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:49,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:49,713 INFO L186 Difference]: Start difference. First operand has 368 places, 382 transitions, 1337 flow. Second operand 3 states and 980 transitions. [2022-07-13 22:09:49,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 383 transitions, 1453 flow [2022-07-13 22:09:49,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 383 transitions, 1409 flow, removed 13 selfloop flow, removed 4 redundant places. [2022-07-13 22:09:49,736 INFO L242 Difference]: Finished difference. Result has 365 places, 367 transitions, 1195 flow [2022-07-13 22:09:49,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1195, PETRI_PLACES=365, PETRI_TRANSITIONS=367} [2022-07-13 22:09:49,737 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 50 predicate places. [2022-07-13 22:09:49,737 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 367 transitions, 1195 flow [2022-07-13 22:09:49,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:49,738 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:49,738 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:49,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 22:09:49,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:49,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1065299214, now seen corresponding path program 1 times [2022-07-13 22:09:49,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:49,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873479932] [2022-07-13 22:09:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:49,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 22:09:49,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:49,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873479932] [2022-07-13 22:09:49,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873479932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:49,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:49,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:09:49,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828778802] [2022-07-13 22:09:49,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:49,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:09:49,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:09:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:09:49,834 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 356 [2022-07-13 22:09:49,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 367 transitions, 1195 flow. Second operand has 4 states, 4 states have (on average 315.25) internal successors, (1261), 4 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:49,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:49,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 356 [2022-07-13 22:09:49,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:50,863 INFO L129 PetriNetUnfolder]: 1834/6691 cut-off events. [2022-07-13 22:09:50,864 INFO L130 PetriNetUnfolder]: For 16388/17522 co-relation queries the response was YES. [2022-07-13 22:09:50,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16277 conditions, 6691 events. 1834/6691 cut-off events. For 16388/17522 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 57108 event pairs, 154 based on Foata normal form. 128/6060 useless extension candidates. Maximal degree in co-relation 16246. Up to 1733 conditions per place. [2022-07-13 22:09:51,028 INFO L132 encePairwiseOnDemand]: 349/356 looper letters, 67 selfloop transitions, 6 changer transitions 0/386 dead transitions. [2022-07-13 22:09:51,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 386 transitions, 1477 flow [2022-07-13 22:09:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:09:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:09:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1287 transitions. [2022-07-13 22:09:51,033 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9037921348314607 [2022-07-13 22:09:51,033 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1287 transitions. [2022-07-13 22:09:51,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1287 transitions. [2022-07-13 22:09:51,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:51,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1287 transitions. [2022-07-13 22:09:51,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 321.75) internal successors, (1287), 4 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:51,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:51,039 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 356.0) internal successors, (1780), 5 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:51,039 INFO L186 Difference]: Start difference. First operand has 365 places, 367 transitions, 1195 flow. Second operand 4 states and 1287 transitions. [2022-07-13 22:09:51,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 386 transitions, 1477 flow [2022-07-13 22:09:51,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 386 transitions, 1457 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:09:51,052 INFO L242 Difference]: Finished difference. Result has 366 places, 363 transitions, 1163 flow [2022-07-13 22:09:51,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1163, PETRI_PLACES=366, PETRI_TRANSITIONS=363} [2022-07-13 22:09:51,054 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 51 predicate places. [2022-07-13 22:09:51,054 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 363 transitions, 1163 flow [2022-07-13 22:09:51,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 315.25) internal successors, (1261), 4 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:51,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:51,055 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:51,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 22:09:51,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash -992488946, now seen corresponding path program 2 times [2022-07-13 22:09:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:51,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73922326] [2022-07-13 22:09:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:51,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:51,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73922326] [2022-07-13 22:09:51,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73922326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:51,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:51,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:09:51,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933792406] [2022-07-13 22:09:51,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:51,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:09:51,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:51,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:09:51,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:09:51,107 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 356 [2022-07-13 22:09:51,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 363 transitions, 1163 flow. Second operand has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:51,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:51,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 356 [2022-07-13 22:09:51,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:53,062 INFO L129 PetriNetUnfolder]: 4662/11462 cut-off events. [2022-07-13 22:09:53,063 INFO L130 PetriNetUnfolder]: For 41866/43881 co-relation queries the response was YES. [2022-07-13 22:09:53,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35559 conditions, 11462 events. 4662/11462 cut-off events. For 41866/43881 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 94879 event pairs, 469 based on Foata normal form. 0/10131 useless extension candidates. Maximal degree in co-relation 35527. Up to 4433 conditions per place. [2022-07-13 22:09:53,259 INFO L132 encePairwiseOnDemand]: 351/356 looper letters, 62 selfloop transitions, 10 changer transitions 0/379 dead transitions. [2022-07-13 22:09:53,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 379 transitions, 1421 flow [2022-07-13 22:09:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:09:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:09:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2022-07-13 22:09:53,261 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.900749063670412 [2022-07-13 22:09:53,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2022-07-13 22:09:53,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2022-07-13 22:09:53,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:53,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2022-07-13 22:09:53,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:53,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:53,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:53,265 INFO L186 Difference]: Start difference. First operand has 366 places, 363 transitions, 1163 flow. Second operand 3 states and 962 transitions. [2022-07-13 22:09:53,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 379 transitions, 1421 flow [2022-07-13 22:09:53,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 379 transitions, 1411 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:09:53,284 INFO L242 Difference]: Finished difference. Result has 368 places, 364 transitions, 1201 flow [2022-07-13 22:09:53,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1201, PETRI_PLACES=368, PETRI_TRANSITIONS=364} [2022-07-13 22:09:53,285 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 53 predicate places. [2022-07-13 22:09:53,285 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 364 transitions, 1201 flow [2022-07-13 22:09:53,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:53,285 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:53,286 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:53,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 22:09:53,286 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1691425328, now seen corresponding path program 3 times [2022-07-13 22:09:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:53,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911909372] [2022-07-13 22:09:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:53,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911909372] [2022-07-13 22:09:53,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911909372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:53,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642824053] [2022-07-13 22:09:53,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:09:53,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:53,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:53,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:09:53,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:09:54,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:09:54,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:09:54,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 22:09:54,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:09:54,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:54,463 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:09:54,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-13 22:09:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:09:54,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642824053] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:09:54,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:09:54,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 7] total 28 [2022-07-13 22:09:54,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446244113] [2022-07-13 22:09:54,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:09:54,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 22:09:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:54,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 22:09:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-07-13 22:09:54,640 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 356 [2022-07-13 22:09:54,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 364 transitions, 1201 flow. Second operand has 28 states, 28 states have (on average 193.71428571428572) internal successors, (5424), 28 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:54,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:54,643 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 356 [2022-07-13 22:09:54,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:58,661 INFO L129 PetriNetUnfolder]: 3274/10592 cut-off events. [2022-07-13 22:09:58,662 INFO L130 PetriNetUnfolder]: For 27029/28895 co-relation queries the response was YES. [2022-07-13 22:09:58,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29053 conditions, 10592 events. 3274/10592 cut-off events. For 27029/28895 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 92628 event pairs, 364 based on Foata normal form. 37/9501 useless extension candidates. Maximal degree in co-relation 29020. Up to 4010 conditions per place. [2022-07-13 22:09:58,858 INFO L132 encePairwiseOnDemand]: 307/356 looper letters, 313 selfloop transitions, 104 changer transitions 34/625 dead transitions. [2022-07-13 22:09:58,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 625 transitions, 2967 flow [2022-07-13 22:09:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 22:09:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-13 22:09:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 8548 transitions. [2022-07-13 22:09:58,869 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5457099080694586 [2022-07-13 22:09:58,869 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 8548 transitions. [2022-07-13 22:09:58,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 8548 transitions. [2022-07-13 22:09:58,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:58,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 8548 transitions. [2022-07-13 22:09:58,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 194.27272727272728) internal successors, (8548), 44 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:58,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 356.0) internal successors, (16020), 45 states have internal predecessors, (16020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:58,899 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 356.0) internal successors, (16020), 45 states have internal predecessors, (16020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:58,899 INFO L186 Difference]: Start difference. First operand has 368 places, 364 transitions, 1201 flow. Second operand 44 states and 8548 transitions. [2022-07-13 22:09:58,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 625 transitions, 2967 flow [2022-07-13 22:09:58,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 625 transitions, 2939 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:09:58,920 INFO L242 Difference]: Finished difference. Result has 426 places, 419 transitions, 1805 flow [2022-07-13 22:09:58,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1805, PETRI_PLACES=426, PETRI_TRANSITIONS=419} [2022-07-13 22:09:58,921 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 111 predicate places. [2022-07-13 22:09:58,921 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 419 transitions, 1805 flow [2022-07-13 22:09:58,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 193.71428571428572) internal successors, (5424), 28 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:58,922 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:58,922 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:58,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:09:59,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 22:09:59,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1280372849, now seen corresponding path program 1 times [2022-07-13 22:09:59,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:59,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004000635] [2022-07-13 22:09:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:59,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 22:09:59,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004000635] [2022-07-13 22:09:59,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004000635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:59,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:59,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:09:59,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091378552] [2022-07-13 22:09:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:59,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:09:59,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:09:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:09:59,187 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 356 [2022-07-13 22:09:59,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 419 transitions, 1805 flow. Second operand has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:59,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:59,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 356 [2022-07-13 22:09:59,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:01,234 INFO L129 PetriNetUnfolder]: 4472/11607 cut-off events. [2022-07-13 22:10:01,235 INFO L130 PetriNetUnfolder]: For 51630/53657 co-relation queries the response was YES. [2022-07-13 22:10:01,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38499 conditions, 11607 events. 4472/11607 cut-off events. For 51630/53657 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 92330 event pairs, 566 based on Foata normal form. 50/10552 useless extension candidates. Maximal degree in co-relation 38449. Up to 4219 conditions per place. [2022-07-13 22:10:01,421 INFO L132 encePairwiseOnDemand]: 350/356 looper letters, 84 selfloop transitions, 5 changer transitions 0/438 dead transitions. [2022-07-13 22:10:01,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 438 transitions, 2149 flow [2022-07-13 22:10:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:10:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:10:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 964 transitions. [2022-07-13 22:10:01,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9026217228464419 [2022-07-13 22:10:01,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 964 transitions. [2022-07-13 22:10:01,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 964 transitions. [2022-07-13 22:10:01,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:01,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 964 transitions. [2022-07-13 22:10:01,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,426 INFO L186 Difference]: Start difference. First operand has 426 places, 419 transitions, 1805 flow. Second operand 3 states and 964 transitions. [2022-07-13 22:10:01,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 438 transitions, 2149 flow [2022-07-13 22:10:01,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 438 transitions, 2008 flow, removed 31 selfloop flow, removed 21 redundant places. [2022-07-13 22:10:01,466 INFO L242 Difference]: Finished difference. Result has 407 places, 420 transitions, 1712 flow [2022-07-13 22:10:01,466 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1712, PETRI_PLACES=407, PETRI_TRANSITIONS=420} [2022-07-13 22:10:01,467 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 92 predicate places. [2022-07-13 22:10:01,467 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 420 transitions, 1712 flow [2022-07-13 22:10:01,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,467 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:01,468 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:01,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 22:10:01,468 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash -64278155, now seen corresponding path program 1 times [2022-07-13 22:10:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:01,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992081248] [2022-07-13 22:10:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 22:10:01,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:01,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992081248] [2022-07-13 22:10:01,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992081248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:01,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:01,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:10:01,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902782356] [2022-07-13 22:10:01,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:01,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:10:01,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:01,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:10:01,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:10:01,536 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 356 [2022-07-13 22:10:01,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 420 transitions, 1712 flow. Second operand has 6 states, 6 states have (on average 276.3333333333333) internal successors, (1658), 6 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:01,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 356 [2022-07-13 22:10:01,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:02,978 INFO L129 PetriNetUnfolder]: 1591/7498 cut-off events. [2022-07-13 22:10:02,978 INFO L130 PetriNetUnfolder]: For 11434/12293 co-relation queries the response was YES. [2022-07-13 22:10:03,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16759 conditions, 7498 events. 1591/7498 cut-off events. For 11434/12293 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 63874 event pairs, 249 based on Foata normal form. 6/6849 useless extension candidates. Maximal degree in co-relation 16710. Up to 1990 conditions per place. [2022-07-13 22:10:03,038 INFO L132 encePairwiseOnDemand]: 346/356 looper letters, 123 selfloop transitions, 10 changer transitions 49/452 dead transitions. [2022-07-13 22:10:03,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 452 transitions, 2220 flow [2022-07-13 22:10:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:10:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:10:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2510 transitions. [2022-07-13 22:10:03,040 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7833957553058677 [2022-07-13 22:10:03,040 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2510 transitions. [2022-07-13 22:10:03,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2510 transitions. [2022-07-13 22:10:03,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:03,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2510 transitions. [2022-07-13 22:10:03,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 278.8888888888889) internal successors, (2510), 9 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:03,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:03,046 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 356.0) internal successors, (3560), 10 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:03,046 INFO L186 Difference]: Start difference. First operand has 407 places, 420 transitions, 1712 flow. Second operand 9 states and 2510 transitions. [2022-07-13 22:10:03,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 452 transitions, 2220 flow [2022-07-13 22:10:03,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 452 transitions, 2210 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:10:03,061 INFO L242 Difference]: Finished difference. Result has 415 places, 401 transitions, 1564 flow [2022-07-13 22:10:03,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1564, PETRI_PLACES=415, PETRI_TRANSITIONS=401} [2022-07-13 22:10:03,062 INFO L279 CegarLoopForPetriNet]: 315 programPoint places, 100 predicate places. [2022-07-13 22:10:03,062 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 401 transitions, 1564 flow [2022-07-13 22:10:03,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 276.3333333333333) internal successors, (1658), 6 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:03,063 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:03,063 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:03,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 22:10:03,063 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:10:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:03,064 INFO L85 PathProgramCache]: Analyzing trace with hash -347910832, now seen corresponding path program 1 times [2022-07-13 22:10:03,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:03,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370598250] [2022-07-13 22:10:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:03,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:10:03,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:03,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370598250] [2022-07-13 22:10:03,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370598250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:03,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353843017] [2022-07-13 22:10:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:03,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:03,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:03,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:03,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:10:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 22:10:03,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:04,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 22:10:05,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:10:05,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:10:05,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:10:05,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:10:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 22:10:05,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:06,451 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:10:06,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 56 [2022-07-13 22:10:06,460 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:10:06,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3222 treesize of output 3101 [2022-07-13 22:10:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:10:06,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1547 treesize of output 1163 [2022-07-13 22:10:06,486 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:10:06,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2710 treesize of output 2518 [2022-07-13 22:10:06,499 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:10:06,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2518 treesize of output 1750 [2022-07-13 22:10:06,512 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:10:06,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1750 treesize of output 1654