./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/array-eq-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:36:17,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:36:17,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:36:17,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:36:17,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:36:17,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:36:17,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:36:17,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:36:17,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:36:17,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:36:17,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:36:17,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:36:17,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:36:17,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:36:17,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:36:17,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:36:17,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:36:17,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:36:17,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:36:17,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:36:17,293 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:36:17,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:36:17,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:36:17,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:36:17,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:36:17,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:36:17,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:36:17,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:36:17,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:36:17,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:36:17,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:36:17,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:36:17,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:36:17,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:36:17,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:36:17,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:36:17,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:36:17,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:36:17,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:36:17,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:36:17,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:36:17,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:36:17,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:36:17,346 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:36:17,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:36:17,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:36:17,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:36:17,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:36:17,348 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:36:17,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:36:17,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:36:17,349 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:36:17,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:36:17,350 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:36:17,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:36:17,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:36:17,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:36:17,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:36:17,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:36:17,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:36:17,352 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:36:17,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:36:17,352 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:36:17,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:36:17,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:36:17,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:36:17,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:36:17,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:36:17,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:36:17,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:36:17,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:36:17,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:36:17,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:36:17,355 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:36:17,355 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:36:17,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:36:17,355 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-07-22 21:36:17,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:36:17,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:36:17,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:36:17,597 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:36:17,597 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:36:17,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-07-22 21:36:17,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d74b7182/57682c7bb9c5494fac678e02cf6c75ff/FLAG43767dcfb [2022-07-22 21:36:18,055 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:36:18,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-07-22 21:36:18,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d74b7182/57682c7bb9c5494fac678e02cf6c75ff/FLAG43767dcfb [2022-07-22 21:36:18,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d74b7182/57682c7bb9c5494fac678e02cf6c75ff [2022-07-22 21:36:18,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:36:18,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:36:18,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:36:18,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:36:18,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:36:18,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c00f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18, skipping insertion in model container [2022-07-22 21:36:18,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:36:18,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:36:18,289 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/array-eq-trans.wvr.c[2737,2750] [2022-07-22 21:36:18,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:36:18,303 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:36:18,324 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/array-eq-trans.wvr.c[2737,2750] [2022-07-22 21:36:18,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:36:18,341 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:36:18,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18 WrapperNode [2022-07-22 21:36:18,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:36:18,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:36:18,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:36:18,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:36:18,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,386 INFO L137 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 204 [2022-07-22 21:36:18,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:36:18,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:36:18,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:36:18,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:36:18,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:36:18,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:36:18,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:36:18,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:36:18,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (1/1) ... [2022-07-22 21:36:18,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:36:18,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:18,460 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) [2022-07-22 21:36:18,487 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 [2022-07-22 21:36:18,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:36:18,505 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:36:18,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:36:18,505 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:36:18,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:36:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:36:18,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:36:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:36:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:36:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:36:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:36:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:36:18,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:36:18,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:36:18,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:36:18,509 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:36:18,585 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:36:18,587 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:36:18,944 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:36:18,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:36:18,966 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:36:18,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:36:18 BoogieIcfgContainer [2022-07-22 21:36:18,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:36:18,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:36:18,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:36:18,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:36:18,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:36:18" (1/3) ... [2022-07-22 21:36:18,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edcf0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:36:18, skipping insertion in model container [2022-07-22 21:36:18,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:18" (2/3) ... [2022-07-22 21:36:18,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edcf0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:36:18, skipping insertion in model container [2022-07-22 21:36:18,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:36:18" (3/3) ... [2022-07-22 21:36:18,975 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2022-07-22 21:36:18,979 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:36:18,987 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:36:18,987 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:36:18,987 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:36:19,060 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:36:19,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 286 places, 306 transitions, 636 flow [2022-07-22 21:36:19,199 INFO L129 PetriNetUnfolder]: 30/303 cut-off events. [2022-07-22 21:36:19,200 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:36:19,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 303 events. 30/303 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 234 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 201. Up to 3 conditions per place. [2022-07-22 21:36:19,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 306 transitions, 636 flow [2022-07-22 21:36:19,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 292 transitions, 602 flow [2022-07-22 21:36:19,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:36:19,250 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@5ea291fd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49c67e88 [2022-07-22 21:36:19,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:36:19,334 INFO L129 PetriNetUnfolder]: 30/291 cut-off events. [2022-07-22 21:36:19,336 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:36:19,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:19,337 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] [2022-07-22 21:36:19,338 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 1 more)] === [2022-07-22 21:36:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1783638466, now seen corresponding path program 1 times [2022-07-22 21:36:19,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:19,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133844824] [2022-07-22 21:36:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:19,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:19,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133844824] [2022-07-22 21:36:19,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133844824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:19,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:19,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:36:19,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366561439] [2022-07-22 21:36:19,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:36:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:19,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:36:19,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:36:19,679 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 306 [2022-07-22 21:36:19,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 292 transitions, 602 flow. Second operand has 2 states, 2 states have (on average 289.0) internal successors, (578), 2 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:19,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 306 [2022-07-22 21:36:19,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:19,760 INFO L129 PetriNetUnfolder]: 15/277 cut-off events. [2022-07-22 21:36:19,761 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-22 21:36:19,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 277 events. 15/277 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 221 event pairs, 0 based on Foata normal form. 21/274 useless extension candidates. Maximal degree in co-relation 192. Up to 7 conditions per place. [2022-07-22 21:36:19,764 INFO L132 encePairwiseOnDemand]: 291/306 looper letters, 6 selfloop transitions, 0 changer transitions 9/277 dead transitions. [2022-07-22 21:36:19,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 277 transitions, 584 flow [2022-07-22 21:36:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:36:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:36:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 589 transitions. [2022-07-22 21:36:19,783 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9624183006535948 [2022-07-22 21:36:19,784 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 589 transitions. [2022-07-22 21:36:19,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 589 transitions. [2022-07-22 21:36:19,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:19,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 589 transitions. [2022-07-22 21:36:19,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 294.5) internal successors, (589), 2 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,803 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,806 INFO L186 Difference]: Start difference. First operand has 272 places, 292 transitions, 602 flow. Second operand 2 states and 589 transitions. [2022-07-22 21:36:19,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 277 transitions, 584 flow [2022-07-22 21:36:19,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 277 transitions, 572 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:36:19,823 INFO L242 Difference]: Finished difference. Result has 267 places, 268 transitions, 542 flow [2022-07-22 21:36:19,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=542, PETRI_PLACES=267, PETRI_TRANSITIONS=268} [2022-07-22 21:36:19,828 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, -5 predicate places. [2022-07-22 21:36:19,829 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 268 transitions, 542 flow [2022-07-22 21:36:19,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 289.0) internal successors, (578), 2 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,829 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:19,830 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] [2022-07-22 21:36:19,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:36:19,830 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 1 more)] === [2022-07-22 21:36:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:19,831 INFO L85 PathProgramCache]: Analyzing trace with hash 9750274, now seen corresponding path program 1 times [2022-07-22 21:36:19,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:19,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090184091] [2022-07-22 21:36:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:19,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:20,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:20,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090184091] [2022-07-22 21:36:20,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090184091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:20,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:20,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:36:20,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191720339] [2022-07-22 21:36:20,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:20,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:36:20,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:36:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:36:20,088 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 306 [2022-07-22 21:36:20,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 268 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 242.2) internal successors, (1211), 5 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:20,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 306 [2022-07-22 21:36:20,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:20,226 INFO L129 PetriNetUnfolder]: 14/272 cut-off events. [2022-07-22 21:36:20,226 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:36:20,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 272 events. 14/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 212 event pairs, 0 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 326. Up to 48 conditions per place. [2022-07-22 21:36:20,228 INFO L132 encePairwiseOnDemand]: 302/306 looper letters, 47 selfloop transitions, 0 changer transitions 4/271 dead transitions. [2022-07-22 21:36:20,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 271 transitions, 650 flow [2022-07-22 21:36:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:36:20,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:36:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1217 transitions. [2022-07-22 21:36:20,233 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954248366013071 [2022-07-22 21:36:20,233 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1217 transitions. [2022-07-22 21:36:20,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1217 transitions. [2022-07-22 21:36:20,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:20,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1217 transitions. [2022-07-22 21:36:20,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 243.4) internal successors, (1217), 5 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,241 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,241 INFO L186 Difference]: Start difference. First operand has 267 places, 268 transitions, 542 flow. Second operand 5 states and 1217 transitions. [2022-07-22 21:36:20,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 271 transitions, 650 flow [2022-07-22 21:36:20,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 271 transitions, 650 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:36:20,249 INFO L242 Difference]: Finished difference. Result has 265 places, 267 transitions, 546 flow [2022-07-22 21:36:20,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=265, PETRI_TRANSITIONS=267} [2022-07-22 21:36:20,251 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, -7 predicate places. [2022-07-22 21:36:20,251 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 267 transitions, 546 flow [2022-07-22 21:36:20,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 242.2) internal successors, (1211), 5 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,253 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:20,253 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] [2022-07-22 21:36:20,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:36:20,254 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 1 more)] === [2022-07-22 21:36:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:20,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1489232946, now seen corresponding path program 1 times [2022-07-22 21:36:20,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:20,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041499278] [2022-07-22 21:36:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:20,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:20,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:20,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041499278] [2022-07-22 21:36:20,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041499278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:20,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:20,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:36:20,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963171329] [2022-07-22 21:36:20,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:20,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:36:20,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:36:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:36:20,567 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 306 [2022-07-22 21:36:20,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 267 transitions, 546 flow. Second operand has 7 states, 7 states have (on average 251.42857142857142) internal successors, (1760), 7 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:20,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 306 [2022-07-22 21:36:20,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:20,941 INFO L129 PetriNetUnfolder]: 225/996 cut-off events. [2022-07-22 21:36:20,941 INFO L130 PetriNetUnfolder]: For 44/57 co-relation queries the response was YES. [2022-07-22 21:36:20,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1445 conditions, 996 events. 225/996 cut-off events. For 44/57 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4730 event pairs, 52 based on Foata normal form. 1/879 useless extension candidates. Maximal degree in co-relation 1438. Up to 157 conditions per place. [2022-07-22 21:36:20,953 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 93 selfloop transitions, 13 changer transitions 4/336 dead transitions. [2022-07-22 21:36:20,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 336 transitions, 916 flow [2022-07-22 21:36:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:36:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:36:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2343 transitions. [2022-07-22 21:36:20,963 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8507625272331155 [2022-07-22 21:36:20,964 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2343 transitions. [2022-07-22 21:36:20,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2343 transitions. [2022-07-22 21:36:20,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:20,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2343 transitions. [2022-07-22 21:36:20,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 260.3333333333333) internal successors, (2343), 9 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,975 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,976 INFO L186 Difference]: Start difference. First operand has 265 places, 267 transitions, 546 flow. Second operand 9 states and 2343 transitions. [2022-07-22 21:36:20,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 336 transitions, 916 flow [2022-07-22 21:36:20,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 336 transitions, 906 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-07-22 21:36:20,982 INFO L242 Difference]: Finished difference. Result has 271 places, 275 transitions, 607 flow [2022-07-22 21:36:20,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=607, PETRI_PLACES=271, PETRI_TRANSITIONS=275} [2022-07-22 21:36:20,984 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, -1 predicate places. [2022-07-22 21:36:20,984 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 275 transitions, 607 flow [2022-07-22 21:36:20,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 251.42857142857142) internal successors, (1760), 7 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:20,985 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] [2022-07-22 21:36:20,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:36:20,986 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 1 more)] === [2022-07-22 21:36:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1007150356, now seen corresponding path program 1 times [2022-07-22 21:36:20,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:20,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938600602] [2022-07-22 21:36:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:20,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:21,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:21,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938600602] [2022-07-22 21:36:21,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938600602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:21,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:21,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:36:21,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140573855] [2022-07-22 21:36:21,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:21,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:36:21,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:36:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:36:21,139 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 306 [2022-07-22 21:36:21,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 275 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:21,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 306 [2022-07-22 21:36:21,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:21,319 INFO L129 PetriNetUnfolder]: 26/457 cut-off events. [2022-07-22 21:36:21,320 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-22 21:36:21,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 457 events. 26/457 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1045 event pairs, 0 based on Foata normal form. 3/430 useless extension candidates. Maximal degree in co-relation 611. Up to 87 conditions per place. [2022-07-22 21:36:21,322 INFO L132 encePairwiseOnDemand]: 300/306 looper letters, 51 selfloop transitions, 6 changer transitions 7/281 dead transitions. [2022-07-22 21:36:21,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 281 transitions, 755 flow [2022-07-22 21:36:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:36:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:36:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1426 transitions. [2022-07-22 21:36:21,326 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7766884531590414 [2022-07-22 21:36:21,326 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1426 transitions. [2022-07-22 21:36:21,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1426 transitions. [2022-07-22 21:36:21,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:21,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1426 transitions. [2022-07-22 21:36:21,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.66666666666666) internal successors, (1426), 6 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,334 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,334 INFO L186 Difference]: Start difference. First operand has 271 places, 275 transitions, 607 flow. Second operand 6 states and 1426 transitions. [2022-07-22 21:36:21,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 281 transitions, 755 flow [2022-07-22 21:36:21,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 281 transitions, 747 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:36:21,340 INFO L242 Difference]: Finished difference. Result has 275 places, 274 transitions, 615 flow [2022-07-22 21:36:21,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=615, PETRI_PLACES=275, PETRI_TRANSITIONS=274} [2022-07-22 21:36:21,341 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 3 predicate places. [2022-07-22 21:36:21,342 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 274 transitions, 615 flow [2022-07-22 21:36:21,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,343 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:21,343 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] [2022-07-22 21:36:21,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:36:21,343 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 1 more)] === [2022-07-22 21:36:21,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:21,344 INFO L85 PathProgramCache]: Analyzing trace with hash 565775480, now seen corresponding path program 1 times [2022-07-22 21:36:21,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:21,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782734993] [2022-07-22 21:36:21,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:21,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:21,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:21,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782734993] [2022-07-22 21:36:21,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782734993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:21,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:21,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:36:21,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717248106] [2022-07-22 21:36:21,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:21,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:36:21,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:21,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:36:21,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:36:21,475 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-22 21:36:21,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 274 transitions, 615 flow. Second operand has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:21,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-22 21:36:21,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:21,802 INFO L129 PetriNetUnfolder]: 189/1089 cut-off events. [2022-07-22 21:36:21,802 INFO L130 PetriNetUnfolder]: For 43/74 co-relation queries the response was YES. [2022-07-22 21:36:21,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 1089 events. 189/1089 cut-off events. For 43/74 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5504 event pairs, 56 based on Foata normal form. 2/957 useless extension candidates. Maximal degree in co-relation 1544. Up to 135 conditions per place. [2022-07-22 21:36:21,811 INFO L132 encePairwiseOnDemand]: 292/306 looper letters, 103 selfloop transitions, 14 changer transitions 2/325 dead transitions. [2022-07-22 21:36:21,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 325 transitions, 974 flow [2022-07-22 21:36:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:36:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:36:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2603 transitions. [2022-07-22 21:36:21,818 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.773321449792038 [2022-07-22 21:36:21,818 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2603 transitions. [2022-07-22 21:36:21,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2603 transitions. [2022-07-22 21:36:21,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:21,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2603 transitions. [2022-07-22 21:36:21,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 236.63636363636363) internal successors, (2603), 11 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,830 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,830 INFO L186 Difference]: Start difference. First operand has 275 places, 274 transitions, 615 flow. Second operand 11 states and 2603 transitions. [2022-07-22 21:36:21,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 325 transitions, 974 flow [2022-07-22 21:36:21,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 325 transitions, 956 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-07-22 21:36:21,838 INFO L242 Difference]: Finished difference. Result has 280 places, 278 transitions, 649 flow [2022-07-22 21:36:21,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=649, PETRI_PLACES=280, PETRI_TRANSITIONS=278} [2022-07-22 21:36:21,839 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 8 predicate places. [2022-07-22 21:36:21,839 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 278 transitions, 649 flow [2022-07-22 21:36:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,840 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:21,840 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] [2022-07-22 21:36:21,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:36:21,841 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 1 more)] === [2022-07-22 21:36:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:21,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1692416661, now seen corresponding path program 1 times [2022-07-22 21:36:21,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:21,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981049961] [2022-07-22 21:36:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:21,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:21,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981049961] [2022-07-22 21:36:21,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981049961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:21,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:21,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:36:21,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151583111] [2022-07-22 21:36:21,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:21,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:36:21,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:21,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:36:21,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:36:21,962 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-07-22 21:36:21,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 278 transitions, 649 flow. Second operand has 7 states, 7 states have (on average 238.14285714285714) internal successors, (1667), 7 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:21,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-07-22 21:36:21,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:22,307 INFO L129 PetriNetUnfolder]: 252/1683 cut-off events. [2022-07-22 21:36:22,308 INFO L130 PetriNetUnfolder]: For 181/198 co-relation queries the response was YES. [2022-07-22 21:36:22,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 1683 events. 252/1683 cut-off events. For 181/198 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9746 event pairs, 86 based on Foata normal form. 0/1538 useless extension candidates. Maximal degree in co-relation 2425. Up to 213 conditions per place. [2022-07-22 21:36:22,321 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 111 selfloop transitions, 14 changer transitions 3/342 dead transitions. [2022-07-22 21:36:22,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 342 transitions, 1082 flow [2022-07-22 21:36:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:36:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:36:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2438 transitions. [2022-07-22 21:36:22,326 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7967320261437908 [2022-07-22 21:36:22,327 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2438 transitions. [2022-07-22 21:36:22,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2438 transitions. [2022-07-22 21:36:22,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:22,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2438 transitions. [2022-07-22 21:36:22,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.8) internal successors, (2438), 10 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:22,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:22,338 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:22,338 INFO L186 Difference]: Start difference. First operand has 280 places, 278 transitions, 649 flow. Second operand 10 states and 2438 transitions. [2022-07-22 21:36:22,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 342 transitions, 1082 flow [2022-07-22 21:36:22,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 342 transitions, 1069 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-22 21:36:22,345 INFO L242 Difference]: Finished difference. Result has 287 places, 283 transitions, 701 flow [2022-07-22 21:36:22,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=701, PETRI_PLACES=287, PETRI_TRANSITIONS=283} [2022-07-22 21:36:22,346 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 15 predicate places. [2022-07-22 21:36:22,346 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 283 transitions, 701 flow [2022-07-22 21:36:22,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.14285714285714) internal successors, (1667), 7 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:22,347 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:22,348 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] [2022-07-22 21:36:22,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:36:22,348 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 1 more)] === [2022-07-22 21:36:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1914456625, now seen corresponding path program 1 times [2022-07-22 21:36:22,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:22,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10796568] [2022-07-22 21:36:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:22,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:22,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:22,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10796568] [2022-07-22 21:36:22,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10796568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:22,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418191863] [2022-07-22 21:36:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:22,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:22,479 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) [2022-07-22 21:36:22,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:36:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:36:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:23,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:23,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418191863] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:23,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:36:23,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-07-22 21:36:23,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193599696] [2022-07-22 21:36:23,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:23,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:36:23,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:23,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:36:23,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:36:23,353 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-22 21:36:23,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 283 transitions, 701 flow. Second operand has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:23,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:23,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-22 21:36:23,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:24,082 INFO L129 PetriNetUnfolder]: 622/3678 cut-off events. [2022-07-22 21:36:24,083 INFO L130 PetriNetUnfolder]: For 324/346 co-relation queries the response was YES. [2022-07-22 21:36:24,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5485 conditions, 3678 events. 622/3678 cut-off events. For 324/346 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 29526 event pairs, 198 based on Foata normal form. 0/3349 useless extension candidates. Maximal degree in co-relation 5472. Up to 484 conditions per place. [2022-07-22 21:36:24,106 INFO L132 encePairwiseOnDemand]: 290/306 looper letters, 112 selfloop transitions, 25 changer transitions 0/348 dead transitions. [2022-07-22 21:36:24,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 348 transitions, 1127 flow [2022-07-22 21:36:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:36:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:36:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3524 transitions. [2022-07-22 21:36:24,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7677559912854031 [2022-07-22 21:36:24,120 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3524 transitions. [2022-07-22 21:36:24,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3524 transitions. [2022-07-22 21:36:24,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:24,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3524 transitions. [2022-07-22 21:36:24,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 234.93333333333334) internal successors, (3524), 15 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:24,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:24,150 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:24,150 INFO L186 Difference]: Start difference. First operand has 287 places, 283 transitions, 701 flow. Second operand 15 states and 3524 transitions. [2022-07-22 21:36:24,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 348 transitions, 1127 flow [2022-07-22 21:36:24,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 348 transitions, 1119 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:36:24,161 INFO L242 Difference]: Finished difference. Result has 306 places, 295 transitions, 820 flow [2022-07-22 21:36:24,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=820, PETRI_PLACES=306, PETRI_TRANSITIONS=295} [2022-07-22 21:36:24,163 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 34 predicate places. [2022-07-22 21:36:24,163 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 295 transitions, 820 flow [2022-07-22 21:36:24,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:24,164 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:24,164 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] [2022-07-22 21:36:24,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:36:24,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:24,383 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 1 more)] === [2022-07-22 21:36:24,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:24,383 INFO L85 PathProgramCache]: Analyzing trace with hash -591311525, now seen corresponding path program 1 times [2022-07-22 21:36:24,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:24,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752619623] [2022-07-22 21:36:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:24,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:36:24,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752619623] [2022-07-22 21:36:24,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752619623] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:24,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:24,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 21:36:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404965505] [2022-07-22 21:36:24,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:24,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:36:24,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:36:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:36:24,701 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-07-22 21:36:24,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 295 transitions, 820 flow. Second operand has 13 states, 13 states have (on average 197.07692307692307) internal successors, (2562), 13 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:24,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:24,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-07-22 21:36:24,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:26,304 INFO L129 PetriNetUnfolder]: 1582/7211 cut-off events. [2022-07-22 21:36:26,305 INFO L130 PetriNetUnfolder]: For 1785/1915 co-relation queries the response was YES. [2022-07-22 21:36:26,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12079 conditions, 7211 events. 1582/7211 cut-off events. For 1785/1915 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 69072 event pairs, 449 based on Foata normal form. 61/6755 useless extension candidates. Maximal degree in co-relation 12059. Up to 1131 conditions per place. [2022-07-22 21:36:26,358 INFO L132 encePairwiseOnDemand]: 280/306 looper letters, 162 selfloop transitions, 29 changer transitions 4/382 dead transitions. [2022-07-22 21:36:26,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 382 transitions, 1460 flow [2022-07-22 21:36:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 21:36:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-22 21:36:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3991 transitions. [2022-07-22 21:36:26,367 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.652124183006536 [2022-07-22 21:36:26,367 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3991 transitions. [2022-07-22 21:36:26,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3991 transitions. [2022-07-22 21:36:26,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:26,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3991 transitions. [2022-07-22 21:36:26,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 199.55) internal successors, (3991), 20 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:26,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 306.0) internal successors, (6426), 21 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:26,385 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 306.0) internal successors, (6426), 21 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:26,386 INFO L186 Difference]: Start difference. First operand has 306 places, 295 transitions, 820 flow. Second operand 20 states and 3991 transitions. [2022-07-22 21:36:26,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 382 transitions, 1460 flow [2022-07-22 21:36:26,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 382 transitions, 1449 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:36:26,399 INFO L242 Difference]: Finished difference. Result has 326 places, 303 transitions, 926 flow [2022-07-22 21:36:26,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=926, PETRI_PLACES=326, PETRI_TRANSITIONS=303} [2022-07-22 21:36:26,400 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-07-22 21:36:26,400 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 303 transitions, 926 flow [2022-07-22 21:36:26,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 197.07692307692307) internal successors, (2562), 13 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:26,401 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:26,402 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] [2022-07-22 21:36:26,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:36:26,402 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 1 more)] === [2022-07-22 21:36:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:26,403 INFO L85 PathProgramCache]: Analyzing trace with hash -484011581, now seen corresponding path program 1 times [2022-07-22 21:36:26,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:26,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486502662] [2022-07-22 21:36:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:26,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:36:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:26,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486502662] [2022-07-22 21:36:26,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486502662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:26,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555980943] [2022-07-22 21:36:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:26,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:26,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:26,517 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) [2022-07-22 21:36:26,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:36:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:26,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:36:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:36:26,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:36:26,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555980943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:26,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:36:26,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-07-22 21:36:26,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510063717] [2022-07-22 21:36:26,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:26,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:36:26,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:36:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:36:26,891 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-07-22 21:36:26,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 303 transitions, 926 flow. Second operand has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:26,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:26,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-07-22 21:36:26,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:28,005 INFO L129 PetriNetUnfolder]: 1266/7212 cut-off events. [2022-07-22 21:36:28,005 INFO L130 PetriNetUnfolder]: For 1948/1990 co-relation queries the response was YES. [2022-07-22 21:36:28,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11200 conditions, 7212 events. 1266/7212 cut-off events. For 1948/1990 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 71914 event pairs, 552 based on Foata normal form. 85/6699 useless extension candidates. Maximal degree in co-relation 11174. Up to 884 conditions per place. [2022-07-22 21:36:28,061 INFO L132 encePairwiseOnDemand]: 296/306 looper letters, 98 selfloop transitions, 11 changer transitions 2/342 dead transitions. [2022-07-22 21:36:28,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 342 transitions, 1263 flow [2022-07-22 21:36:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:36:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:36:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1950 transitions. [2022-07-22 21:36:28,066 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7965686274509803 [2022-07-22 21:36:28,066 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1950 transitions. [2022-07-22 21:36:28,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1950 transitions. [2022-07-22 21:36:28,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:28,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1950 transitions. [2022-07-22 21:36:28,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 243.75) internal successors, (1950), 8 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:28,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:28,076 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:28,076 INFO L186 Difference]: Start difference. First operand has 326 places, 303 transitions, 926 flow. Second operand 8 states and 1950 transitions. [2022-07-22 21:36:28,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 342 transitions, 1263 flow [2022-07-22 21:36:28,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 342 transitions, 1219 flow, removed 6 selfloop flow, removed 13 redundant places. [2022-07-22 21:36:28,093 INFO L242 Difference]: Finished difference. Result has 320 places, 305 transitions, 922 flow [2022-07-22 21:36:28,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=922, PETRI_PLACES=320, PETRI_TRANSITIONS=305} [2022-07-22 21:36:28,095 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 48 predicate places. [2022-07-22 21:36:28,095 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 305 transitions, 922 flow [2022-07-22 21:36:28,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:28,096 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:28,096 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] [2022-07-22 21:36:28,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:28,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 21:36:28,321 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 1 more)] === [2022-07-22 21:36:28,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash -541306598, now seen corresponding path program 1 times [2022-07-22 21:36:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:28,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368832220] [2022-07-22 21:36:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:28,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:36:28,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:28,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368832220] [2022-07-22 21:36:28,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368832220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:28,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:28,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:36:28,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307353022] [2022-07-22 21:36:28,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:28,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:36:28,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:28,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:36:28,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:36:28,449 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-07-22 21:36:28,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 305 transitions, 922 flow. Second operand has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:28,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:28,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-07-22 21:36:28,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:29,136 INFO L129 PetriNetUnfolder]: 383/3677 cut-off events. [2022-07-22 21:36:29,137 INFO L130 PetriNetUnfolder]: For 992/1125 co-relation queries the response was YES. [2022-07-22 21:36:29,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5472 conditions, 3677 events. 383/3677 cut-off events. For 992/1125 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 30511 event pairs, 151 based on Foata normal form. 10/3439 useless extension candidates. Maximal degree in co-relation 5445. Up to 408 conditions per place. [2022-07-22 21:36:29,167 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 80 selfloop transitions, 11 changer transitions 41/362 dead transitions. [2022-07-22 21:36:29,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 362 transitions, 1393 flow [2022-07-22 21:36:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:36:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:36:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2434 transitions. [2022-07-22 21:36:29,172 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954248366013071 [2022-07-22 21:36:29,172 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2434 transitions. [2022-07-22 21:36:29,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2434 transitions. [2022-07-22 21:36:29,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:29,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2434 transitions. [2022-07-22 21:36:29,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.4) internal successors, (2434), 10 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:29,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:29,183 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:29,183 INFO L186 Difference]: Start difference. First operand has 320 places, 305 transitions, 922 flow. Second operand 10 states and 2434 transitions. [2022-07-22 21:36:29,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 362 transitions, 1393 flow [2022-07-22 21:36:29,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 362 transitions, 1375 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:36:29,193 INFO L242 Difference]: Finished difference. Result has 326 places, 302 transitions, 913 flow [2022-07-22 21:36:29,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=913, PETRI_PLACES=326, PETRI_TRANSITIONS=302} [2022-07-22 21:36:29,194 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-07-22 21:36:29,194 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 302 transitions, 913 flow [2022-07-22 21:36:29,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:29,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:29,195 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] [2022-07-22 21:36:29,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:36:29,195 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 1 more)] === [2022-07-22 21:36:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash -671641809, now seen corresponding path program 1 times [2022-07-22 21:36:29,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:29,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077749745] [2022-07-22 21:36:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:29,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:29,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:29,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077749745] [2022-07-22 21:36:29,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077749745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:29,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564130019] [2022-07-22 21:36:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:29,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:29,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:29,303 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) [2022-07-22 21:36:29,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:36:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:29,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:36:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:29,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:30,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564130019] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:30,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:36:30,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-07-22 21:36:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770824900] [2022-07-22 21:36:30,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:30,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:36:30,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:30,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:36:30,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:36:30,153 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-22 21:36:30,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 302 transitions, 913 flow. Second operand has 8 states, 8 states have (on average 232.25) internal successors, (1858), 8 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:30,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:30,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-22 21:36:30,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:30,761 INFO L129 PetriNetUnfolder]: 363/3496 cut-off events. [2022-07-22 21:36:30,761 INFO L130 PetriNetUnfolder]: For 1105/1214 co-relation queries the response was YES. [2022-07-22 21:36:30,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5337 conditions, 3496 events. 363/3496 cut-off events. For 1105/1214 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 29275 event pairs, 121 based on Foata normal form. 23/3284 useless extension candidates. Maximal degree in co-relation 5309. Up to 393 conditions per place. [2022-07-22 21:36:30,795 INFO L132 encePairwiseOnDemand]: 295/306 looper letters, 96 selfloop transitions, 17 changer transitions 6/330 dead transitions. [2022-07-22 21:36:30,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 330 transitions, 1221 flow [2022-07-22 21:36:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:36:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:36:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2591 transitions. [2022-07-22 21:36:30,801 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7697563874034462 [2022-07-22 21:36:30,801 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2591 transitions. [2022-07-22 21:36:30,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2591 transitions. [2022-07-22 21:36:30,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:30,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2591 transitions. [2022-07-22 21:36:30,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 235.54545454545453) internal successors, (2591), 11 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:30,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:30,812 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:30,813 INFO L186 Difference]: Start difference. First operand has 326 places, 302 transitions, 913 flow. Second operand 11 states and 2591 transitions. [2022-07-22 21:36:30,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 330 transitions, 1221 flow [2022-07-22 21:36:30,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 330 transitions, 1171 flow, removed 6 selfloop flow, removed 13 redundant places. [2022-07-22 21:36:30,823 INFO L242 Difference]: Finished difference. Result has 320 places, 296 transitions, 879 flow [2022-07-22 21:36:30,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=879, PETRI_PLACES=320, PETRI_TRANSITIONS=296} [2022-07-22 21:36:30,825 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 48 predicate places. [2022-07-22 21:36:30,825 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 296 transitions, 879 flow [2022-07-22 21:36:30,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.25) internal successors, (1858), 8 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:30,826 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:30,826 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] [2022-07-22 21:36:30,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:31,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:31,051 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 1 more)] === [2022-07-22 21:36:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:31,052 INFO L85 PathProgramCache]: Analyzing trace with hash 45230378, now seen corresponding path program 1 times [2022-07-22 21:36:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:31,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518595677] [2022-07-22 21:36:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:31,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:36:31,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:31,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518595677] [2022-07-22 21:36:31,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518595677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:31,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:31,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:36:31,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562856097] [2022-07-22 21:36:31,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:31,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:36:31,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:31,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:36:31,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:36:31,137 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 306 [2022-07-22 21:36:31,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 296 transitions, 879 flow. Second operand has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:31,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:31,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 306 [2022-07-22 21:36:31,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:31,504 INFO L129 PetriNetUnfolder]: 60/2324 cut-off events. [2022-07-22 21:36:31,504 INFO L130 PetriNetUnfolder]: For 494/503 co-relation queries the response was YES. [2022-07-22 21:36:31,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3749 conditions, 2324 events. 60/2324 cut-off events. For 494/503 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 18121 event pairs, 0 based on Foata normal form. 27/2256 useless extension candidates. Maximal degree in co-relation 3723. Up to 577 conditions per place. [2022-07-22 21:36:31,517 INFO L132 encePairwiseOnDemand]: 300/306 looper letters, 52 selfloop transitions, 5 changer transitions 7/302 dead transitions. [2022-07-22 21:36:31,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 302 transitions, 1030 flow [2022-07-22 21:36:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:36:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:36:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1426 transitions. [2022-07-22 21:36:31,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7766884531590414 [2022-07-22 21:36:31,520 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1426 transitions. [2022-07-22 21:36:31,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1426 transitions. [2022-07-22 21:36:31,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:31,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1426 transitions. [2022-07-22 21:36:31,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.66666666666666) internal successors, (1426), 6 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:31,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:31,525 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:31,525 INFO L186 Difference]: Start difference. First operand has 320 places, 296 transitions, 879 flow. Second operand 6 states and 1426 transitions. [2022-07-22 21:36:31,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 302 transitions, 1030 flow [2022-07-22 21:36:31,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 302 transitions, 990 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-07-22 21:36:31,534 INFO L242 Difference]: Finished difference. Result has 314 places, 295 transitions, 853 flow [2022-07-22 21:36:31,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=853, PETRI_PLACES=314, PETRI_TRANSITIONS=295} [2022-07-22 21:36:31,535 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 42 predicate places. [2022-07-22 21:36:31,535 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 295 transitions, 853 flow [2022-07-22 21:36:31,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:31,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:31,536 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] [2022-07-22 21:36:31,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:36:31,537 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 1 more)] === [2022-07-22 21:36:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:31,537 INFO L85 PathProgramCache]: Analyzing trace with hash -940246847, now seen corresponding path program 1 times [2022-07-22 21:36:31,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:31,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811733056] [2022-07-22 21:36:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:31,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:31,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:31,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811733056] [2022-07-22 21:36:31,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811733056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:31,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110324459] [2022-07-22 21:36:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:31,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:31,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:31,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:36:31,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:36:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:31,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:36:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:36:32,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:36:32,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110324459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:32,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:36:32,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2022-07-22 21:36:32,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763971952] [2022-07-22 21:36:32,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:32,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:36:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:36:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:36:32,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-22 21:36:32,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 295 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:32,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:32,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-22 21:36:32,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:32,770 INFO L129 PetriNetUnfolder]: 749/3930 cut-off events. [2022-07-22 21:36:32,770 INFO L130 PetriNetUnfolder]: For 1235/1255 co-relation queries the response was YES. [2022-07-22 21:36:32,784 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6245 conditions, 3930 events. 749/3930 cut-off events. For 1235/1255 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 34531 event pairs, 269 based on Foata normal form. 15/3552 useless extension candidates. Maximal degree in co-relation 6218. Up to 651 conditions per place. [2022-07-22 21:36:32,792 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 86 selfloop transitions, 8 changer transitions 11/325 dead transitions. [2022-07-22 21:36:32,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 325 transitions, 1139 flow [2022-07-22 21:36:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:36:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:36:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2135 transitions. [2022-07-22 21:36:32,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7752360203340596 [2022-07-22 21:36:32,797 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2135 transitions. [2022-07-22 21:36:32,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2135 transitions. [2022-07-22 21:36:32,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:32,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2135 transitions. [2022-07-22 21:36:32,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 237.22222222222223) internal successors, (2135), 9 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:32,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:32,805 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:32,805 INFO L186 Difference]: Start difference. First operand has 314 places, 295 transitions, 853 flow. Second operand 9 states and 2135 transitions. [2022-07-22 21:36:32,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 325 transitions, 1139 flow [2022-07-22 21:36:32,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 325 transitions, 1123 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-07-22 21:36:32,815 INFO L242 Difference]: Finished difference. Result has 316 places, 294 transitions, 853 flow [2022-07-22 21:36:32,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=853, PETRI_PLACES=316, PETRI_TRANSITIONS=294} [2022-07-22 21:36:32,816 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 44 predicate places. [2022-07-22 21:36:32,816 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 294 transitions, 853 flow [2022-07-22 21:36:32,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:32,817 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:32,817 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] [2022-07-22 21:36:32,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:33,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:33,042 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 1 more)] === [2022-07-22 21:36:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1218469367, now seen corresponding path program 1 times [2022-07-22 21:36:33,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:33,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896499354] [2022-07-22 21:36:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:33,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:36:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:33,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896499354] [2022-07-22 21:36:33,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896499354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:33,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162200525] [2022-07-22 21:36:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:33,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:33,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:36:33,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:36:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:33,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:36:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:36:33,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:36:34,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162200525] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:34,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:36:34,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 27 [2022-07-22 21:36:34,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266726834] [2022-07-22 21:36:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:34,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:36:34,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:36:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-07-22 21:36:34,405 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 306 [2022-07-22 21:36:34,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 294 transitions, 853 flow. Second operand has 11 states, 11 states have (on average 222.8181818181818) internal successors, (2451), 11 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:34,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:34,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 306 [2022-07-22 21:36:34,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:35,326 INFO L129 PetriNetUnfolder]: 1313/5654 cut-off events. [2022-07-22 21:36:35,326 INFO L130 PetriNetUnfolder]: For 2150/2225 co-relation queries the response was YES. [2022-07-22 21:36:35,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9797 conditions, 5654 events. 1313/5654 cut-off events. For 2150/2225 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 52443 event pairs, 404 based on Foata normal form. 58/5327 useless extension candidates. Maximal degree in co-relation 9771. Up to 800 conditions per place. [2022-07-22 21:36:35,373 INFO L132 encePairwiseOnDemand]: 290/306 looper letters, 130 selfloop transitions, 13 changer transitions 5/356 dead transitions. [2022-07-22 21:36:35,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 356 transitions, 1342 flow [2022-07-22 21:36:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:36:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:36:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3392 transitions. [2022-07-22 21:36:35,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7389978213507625 [2022-07-22 21:36:35,379 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3392 transitions. [2022-07-22 21:36:35,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3392 transitions. [2022-07-22 21:36:35,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:35,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3392 transitions. [2022-07-22 21:36:35,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 226.13333333333333) internal successors, (3392), 15 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:35,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:35,392 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:35,392 INFO L186 Difference]: Start difference. First operand has 316 places, 294 transitions, 853 flow. Second operand 15 states and 3392 transitions. [2022-07-22 21:36:35,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 356 transitions, 1342 flow [2022-07-22 21:36:35,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 356 transitions, 1306 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-07-22 21:36:35,405 INFO L242 Difference]: Finished difference. Result has 325 places, 296 transitions, 881 flow [2022-07-22 21:36:35,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=881, PETRI_PLACES=325, PETRI_TRANSITIONS=296} [2022-07-22 21:36:35,406 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 53 predicate places. [2022-07-22 21:36:35,406 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 296 transitions, 881 flow [2022-07-22 21:36:35,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 222.8181818181818) internal successors, (2451), 11 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:35,407 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:35,407 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] [2022-07-22 21:36:35,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:35,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 21:36:35,632 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 1 more)] === [2022-07-22 21:36:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:35,632 INFO L85 PathProgramCache]: Analyzing trace with hash -36899099, now seen corresponding path program 1 times [2022-07-22 21:36:35,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:35,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694756550] [2022-07-22 21:36:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:35,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:36:35,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:35,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694756550] [2022-07-22 21:36:35,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694756550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:35,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123449211] [2022-07-22 21:36:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:35,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:35,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:35,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:36:35,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:36:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:35,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:36:35,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:36:36,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:36:36,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123449211] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:36,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:36:36,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-07-22 21:36:36,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950146490] [2022-07-22 21:36:36,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:36,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:36:36,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:36:36,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:36:36,656 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-22 21:36:36,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 296 transitions, 881 flow. Second operand has 8 states, 8 states have (on average 232.75) internal successors, (1862), 8 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:36,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:36,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-22 21:36:36,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:37,306 INFO L129 PetriNetUnfolder]: 792/4472 cut-off events. [2022-07-22 21:36:37,307 INFO L130 PetriNetUnfolder]: For 1858/1941 co-relation queries the response was YES. [2022-07-22 21:36:37,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7486 conditions, 4472 events. 792/4472 cut-off events. For 1858/1941 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 40822 event pairs, 300 based on Foata normal form. 72/4086 useless extension candidates. Maximal degree in co-relation 7457. Up to 622 conditions per place. [2022-07-22 21:36:37,335 INFO L132 encePairwiseOnDemand]: 291/306 looper letters, 92 selfloop transitions, 19 changer transitions 0/334 dead transitions. [2022-07-22 21:36:37,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 334 transitions, 1217 flow [2022-07-22 21:36:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:36:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:36:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3039 transitions. [2022-07-22 21:36:37,340 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7639517345399698 [2022-07-22 21:36:37,340 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3039 transitions. [2022-07-22 21:36:37,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3039 transitions. [2022-07-22 21:36:37,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:37,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3039 transitions. [2022-07-22 21:36:37,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 233.76923076923077) internal successors, (3039), 13 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:37,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:37,350 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:37,350 INFO L186 Difference]: Start difference. First operand has 325 places, 296 transitions, 881 flow. Second operand 13 states and 3039 transitions. [2022-07-22 21:36:37,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 334 transitions, 1217 flow [2022-07-22 21:36:37,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 334 transitions, 1183 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-07-22 21:36:37,362 INFO L242 Difference]: Finished difference. Result has 326 places, 303 transitions, 930 flow [2022-07-22 21:36:37,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=930, PETRI_PLACES=326, PETRI_TRANSITIONS=303} [2022-07-22 21:36:37,363 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-07-22 21:36:37,363 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 303 transitions, 930 flow [2022-07-22 21:36:37,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.75) internal successors, (1862), 8 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:37,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:37,364 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] [2022-07-22 21:36:37,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:37,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 21:36:37,584 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 1 more)] === [2022-07-22 21:36:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash -864065180, now seen corresponding path program 1 times [2022-07-22 21:36:37,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:37,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020637205] [2022-07-22 21:36:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:37,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:36:37,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:37,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020637205] [2022-07-22 21:36:37,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020637205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:37,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414710642] [2022-07-22 21:36:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:37,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:37,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:37,733 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:36:37,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:36:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:37,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:36:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:36:38,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:36:39,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414710642] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:39,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:36:39,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 25 [2022-07-22 21:36:39,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847295606] [2022-07-22 21:36:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:39,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:36:39,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:36:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-07-22 21:36:39,053 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 306 [2022-07-22 21:36:39,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 303 transitions, 930 flow. Second operand has 11 states, 11 states have (on average 222.9090909090909) internal successors, (2452), 11 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:39,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:39,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 306 [2022-07-22 21:36:39,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:39,960 INFO L129 PetriNetUnfolder]: 1240/6600 cut-off events. [2022-07-22 21:36:39,960 INFO L130 PetriNetUnfolder]: For 3856/4031 co-relation queries the response was YES. [2022-07-22 21:36:39,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11898 conditions, 6600 events. 1240/6600 cut-off events. For 3856/4031 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 64529 event pairs, 444 based on Foata normal form. 161/6417 useless extension candidates. Maximal degree in co-relation 11870. Up to 956 conditions per place. [2022-07-22 21:36:40,001 INFO L132 encePairwiseOnDemand]: 292/306 looper letters, 143 selfloop transitions, 12 changer transitions 9/374 dead transitions. [2022-07-22 21:36:40,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 374 transitions, 1524 flow [2022-07-22 21:36:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:36:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:36:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2956 transitions. [2022-07-22 21:36:40,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.743086978381096 [2022-07-22 21:36:40,006 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2956 transitions. [2022-07-22 21:36:40,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2956 transitions. [2022-07-22 21:36:40,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:40,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2956 transitions. [2022-07-22 21:36:40,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 227.3846153846154) internal successors, (2956), 13 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:40,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:40,015 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:40,015 INFO L186 Difference]: Start difference. First operand has 326 places, 303 transitions, 930 flow. Second operand 13 states and 2956 transitions. [2022-07-22 21:36:40,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 374 transitions, 1524 flow [2022-07-22 21:36:40,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 374 transitions, 1501 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-22 21:36:40,033 INFO L242 Difference]: Finished difference. Result has 338 places, 305 transitions, 954 flow [2022-07-22 21:36:40,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=954, PETRI_PLACES=338, PETRI_TRANSITIONS=305} [2022-07-22 21:36:40,034 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 66 predicate places. [2022-07-22 21:36:40,034 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 305 transitions, 954 flow [2022-07-22 21:36:40,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 222.9090909090909) internal successors, (2452), 11 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:40,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:40,035 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] [2022-07-22 21:36:40,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:40,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:40,252 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 1 more)] === [2022-07-22 21:36:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1537255849, now seen corresponding path program 1 times [2022-07-22 21:36:40,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:40,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571088959] [2022-07-22 21:36:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:36:41,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571088959] [2022-07-22 21:36:41,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571088959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104154831] [2022-07-22 21:36:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:41,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:41,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:41,320 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:36:41,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:36:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:41,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-22 21:36:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:42,712 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-22 21:36:42,712 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 26 treesize of output 10 [2022-07-22 21:36:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:36:42,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:44,735 INFO L356 Elim1Store]: treesize reduction 62, result has 77.6 percent of original size [2022-07-22 21:36:44,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 226 [2022-07-22 21:36:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:36:46,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104154831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:36:46,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:36:46,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 13] total 42 [2022-07-22 21:36:46,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309179923] [2022-07-22 21:36:46,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:36:46,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 21:36:46,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 21:36:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1503, Unknown=1, NotChecked=0, Total=1722 [2022-07-22 21:36:46,049 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-07-22 21:36:46,053 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 305 transitions, 954 flow. Second operand has 42 states, 42 states have (on average 194.76190476190476) internal successors, (8180), 42 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:46,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:46,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-07-22 21:36:46,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:15,226 INFO L129 PetriNetUnfolder]: 134232/212146 cut-off events. [2022-07-22 21:37:15,227 INFO L130 PetriNetUnfolder]: For 177761/177761 co-relation queries the response was YES. [2022-07-22 21:37:17,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487849 conditions, 212146 events. 134232/212146 cut-off events. For 177761/177761 co-relation queries the response was YES. Maximal size of possible extension queue 6132. Compared 1980921 event pairs, 16534 based on Foata normal form. 0/198627 useless extension candidates. Maximal degree in co-relation 487815. Up to 56933 conditions per place. [2022-07-22 21:37:17,872 INFO L132 encePairwiseOnDemand]: 257/306 looper letters, 1425 selfloop transitions, 355 changer transitions 61/2029 dead transitions. [2022-07-22 21:37:17,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 2029 transitions, 9935 flow [2022-07-22 21:37:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-22 21:37:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-07-22 21:37:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 22057 transitions. [2022-07-22 21:37:17,894 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6800160315698607 [2022-07-22 21:37:17,895 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 22057 transitions. [2022-07-22 21:37:17,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 22057 transitions. [2022-07-22 21:37:17,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:17,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 22057 transitions. [2022-07-22 21:37:17,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 208.08490566037736) internal successors, (22057), 106 states have internal predecessors, (22057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:17,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 306.0) internal successors, (32742), 107 states have internal predecessors, (32742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:17,960 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 306.0) internal successors, (32742), 107 states have internal predecessors, (32742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:17,960 INFO L186 Difference]: Start difference. First operand has 338 places, 305 transitions, 954 flow. Second operand 106 states and 22057 transitions. [2022-07-22 21:37:17,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 2029 transitions, 9935 flow [2022-07-22 21:37:20,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2029 transitions, 9887 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-07-22 21:37:20,796 INFO L242 Difference]: Finished difference. Result has 502 places, 650 transitions, 4042 flow [2022-07-22 21:37:20,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=4042, PETRI_PLACES=502, PETRI_TRANSITIONS=650} [2022-07-22 21:37:20,796 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 230 predicate places. [2022-07-22 21:37:20,797 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 650 transitions, 4042 flow [2022-07-22 21:37:20,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 194.76190476190476) internal successors, (8180), 42 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:20,798 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:20,798 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] [2022-07-22 21:37:20,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:37:20,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:37:20,999 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:37:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash 109038267, now seen corresponding path program 2 times [2022-07-22 21:37:21,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:21,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104942659] [2022-07-22 21:37:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:21,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:37:21,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:21,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104942659] [2022-07-22 21:37:21,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104942659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:21,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:21,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-22 21:37:21,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533431150] [2022-07-22 21:37:21,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:21,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 21:37:21,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:21,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 21:37:21,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-07-22 21:37:21,868 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-07-22 21:37:21,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 650 transitions, 4042 flow. Second operand has 29 states, 29 states have (on average 193.79310344827587) internal successors, (5620), 29 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:21,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:21,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-07-22 21:37:21,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand