./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/chl-name-comparator-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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:16:36,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:16:36,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:16:36,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:16:36,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:16:36,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:16:36,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:16:36,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:16:36,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:16:36,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:16:36,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:16:36,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:16:36,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:16:36,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:16:36,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:16:36,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:16:36,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:16:36,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:16:36,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:16:36,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:16:36,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:16:36,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:16:36,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:16:36,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:16:36,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:16:36,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:16:36,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:16:36,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:16:36,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:16:36,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:16:36,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:16:36,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:16:36,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:16:36,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:16:36,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:16:36,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:16:36,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:16:36,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:16:36,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:16:36,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:16:36,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:16:36,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:16:36,410 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:16:36,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:16:36,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:16:36,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:16:36,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:16:36,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:16:36,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:16:36,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:16:36,414 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:16:36,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:16:36,415 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:16:36,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:16:36,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:16:36,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:16:36,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:16:36,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:16:36,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:16:36,416 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:16:36,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:16:36,417 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:16:36,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:16:36,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:16:36,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:16:36,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:16:36,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:16:36,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:16:36,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:16:36,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:16:36,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:16:36,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:16:36,419 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:16:36,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:16:36,420 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:16:36,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:16:36,420 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:16:36,420 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:16:36,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:16:36,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:16:36,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:16:36,760 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:16:36,760 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:16:36,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-08-31 01:16:37,869 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:16:38,076 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:16:38,077 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-08-31 01:16:38,083 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e357f0238/4ced9bc04b2f4bccaa6f97ff95a25163/FLAGf4f20b3df [2023-08-31 01:16:38,095 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e357f0238/4ced9bc04b2f4bccaa6f97ff95a25163 [2023-08-31 01:16:38,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:16:38,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:16:38,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:16:38,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:16:38,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:16:38,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2794c52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38, skipping insertion in model container [2023-08-31 01:16:38,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:16:38,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:16:38,264 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-08-31 01:16:38,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:16:38,281 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:16:38,319 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-08-31 01:16:38,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:16:38,349 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:16:38,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38 WrapperNode [2023-08-31 01:16:38,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:16:38,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:16:38,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:16:38,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:16:38,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,419 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 316 [2023-08-31 01:16:38,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:16:38,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:16:38,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:16:38,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:16:38,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,475 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:16:38,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:16:38,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:16:38,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:16:38,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (1/1) ... [2023-08-31 01:16:38,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:16:38,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:38,527 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) [2023-08-31 01:16:38,550 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 [2023-08-31 01:16:38,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:16:38,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:16:38,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:16:38,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:16:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:16:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:16:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:16:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:16:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:16:38,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:16:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:16:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:16:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:16:38,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:16:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:16:38,572 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:16:38,732 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:16:38,746 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:16:39,214 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:16:39,226 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:16:39,227 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 01:16:39,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:16:39 BoogieIcfgContainer [2023-08-31 01:16:39,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:16:39,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:16:39,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:16:39,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:16:39,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:16:38" (1/3) ... [2023-08-31 01:16:39,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174e500b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:16:39, skipping insertion in model container [2023-08-31 01:16:39,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:38" (2/3) ... [2023-08-31 01:16:39,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174e500b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:16:39, skipping insertion in model container [2023-08-31 01:16:39,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:16:39" (3/3) ... [2023-08-31 01:16:39,254 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-08-31 01:16:39,261 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:16:39,268 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:16:39,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:16:39,269 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:16:39,366 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:16:39,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 360 transitions, 744 flow [2023-08-31 01:16:39,583 INFO L130 PetriNetUnfolder]: 26/357 cut-off events. [2023-08-31 01:16:39,583 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:16:39,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 357 events. 26/357 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-08-31 01:16:39,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 360 transitions, 744 flow [2023-08-31 01:16:39,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 347 transitions, 712 flow [2023-08-31 01:16:39,610 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:16:39,632 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 331 places, 347 transitions, 712 flow [2023-08-31 01:16:39,637 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 331 places, 347 transitions, 712 flow [2023-08-31 01:16:39,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 347 transitions, 712 flow [2023-08-31 01:16:39,714 INFO L130 PetriNetUnfolder]: 26/347 cut-off events. [2023-08-31 01:16:39,715 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:16:39,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 26/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 807 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-08-31 01:16:39,733 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-08-31 01:16:49,653 INFO L134 LiptonReduction]: Checked pairs total: 26332 [2023-08-31 01:16:49,654 INFO L136 LiptonReduction]: Total number of compositions: 411 [2023-08-31 01:16:49,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:16:49,671 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e7cb1d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:16:49,672 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:16:49,678 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-08-31 01:16:49,678 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:16:49,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:49,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:49,680 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)] === [2023-08-31 01:16:49,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:49,685 INFO L85 PathProgramCache]: Analyzing trace with hash 938001691, now seen corresponding path program 1 times [2023-08-31 01:16:49,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:49,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199031382] [2023-08-31 01:16:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:49,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:16:50,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:50,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199031382] [2023-08-31 01:16:50,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199031382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:50,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:50,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:16:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639124003] [2023-08-31 01:16:50,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:50,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:16:50,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:50,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:16:50,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:16:50,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 771 [2023-08-31 01:16:50,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:50,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:50,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 771 [2023-08-31 01:16:50,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:50,267 INFO L130 PetriNetUnfolder]: 221/328 cut-off events. [2023-08-31 01:16:50,268 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-31 01:16:50,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-08-31 01:16:50,271 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-31 01:16:50,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-08-31 01:16:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:16:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:16:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2023-08-31 01:16:50,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43925637699956765 [2023-08-31 01:16:50,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2023-08-31 01:16:50,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2023-08-31 01:16:50,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:50,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2023-08-31 01:16:50,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:50,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:50,305 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:50,307 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 1016 transitions. [2023-08-31 01:16:50,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-08-31 01:16:50,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:16:50,311 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-08-31 01:16:50,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-08-31 01:16:50,315 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-31 01:16:50,315 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-08-31 01:16:50,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:50,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:50,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:50,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:16:50,317 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)] === [2023-08-31 01:16:50,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1524160958, now seen corresponding path program 1 times [2023-08-31 01:16:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962553924] [2023-08-31 01:16:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:16:50,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:50,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962553924] [2023-08-31 01:16:50,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962553924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:50,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807525056] [2023-08-31 01:16:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:50,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:50,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:50,555 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) [2023-08-31 01:16:50,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:16:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 01:16:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:16:50,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:16:50,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807525056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:16:50,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:16:50,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 01:16:50,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544408593] [2023-08-31 01:16:50,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:16:50,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:16:50,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:16:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:16:50,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 771 [2023-08-31 01:16:50,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 331.85714285714283) internal successors, (2323), 7 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:50,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:50,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 771 [2023-08-31 01:16:50,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:51,007 INFO L130 PetriNetUnfolder]: 221/330 cut-off events. [2023-08-31 01:16:51,008 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:16:51,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-08-31 01:16:51,010 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-31 01:16:51,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-08-31 01:16:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1669 transitions. [2023-08-31 01:16:51,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329442282749676 [2023-08-31 01:16:51,014 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1669 transitions. [2023-08-31 01:16:51,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1669 transitions. [2023-08-31 01:16:51,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:51,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1669 transitions. [2023-08-31 01:16:51,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 333.8) internal successors, (1669), 5 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,027 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,027 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1669 transitions. [2023-08-31 01:16:51,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-08-31 01:16:51,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:16:51,029 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-08-31 01:16:51,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-31 01:16:51,030 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-31 01:16:51,030 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-08-31 01:16:51,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 331.85714285714283) internal successors, (2323), 7 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:51,032 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:51,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 01:16:51,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:51,241 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)] === [2023-08-31 01:16:51,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash -793936030, now seen corresponding path program 2 times [2023-08-31 01:16:51,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:51,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100816881] [2023-08-31 01:16:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:51,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:51,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:51,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100816881] [2023-08-31 01:16:51,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100816881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:51,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:51,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:16:51,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981695009] [2023-08-31 01:16:51,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:51,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:51,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:51,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:16:51,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 771 [2023-08-31 01:16:51,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:51,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 771 [2023-08-31 01:16:51,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:51,978 INFO L130 PetriNetUnfolder]: 381/567 cut-off events. [2023-08-31 01:16:51,978 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 01:16:51,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1711 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2023-08-31 01:16:51,981 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2023-08-31 01:16:51,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2023-08-31 01:16:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:16:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:16:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1286 transitions. [2023-08-31 01:16:51,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169909208819715 [2023-08-31 01:16:51,985 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1286 transitions. [2023-08-31 01:16:51,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1286 transitions. [2023-08-31 01:16:51,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:51,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1286 transitions. [2023-08-31 01:16:51,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 321.5) internal successors, (1286), 4 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,994 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,995 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1286 transitions. [2023-08-31 01:16:51,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2023-08-31 01:16:51,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 01:16:51,997 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-08-31 01:16:51,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-31 01:16:51,998 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-08-31 01:16:51,998 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-08-31 01:16:51,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:51,999 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:52,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:16:52,000 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)] === [2023-08-31 01:16:52,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash 529846484, now seen corresponding path program 1 times [2023-08-31 01:16:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:52,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132695742] [2023-08-31 01:16:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:52,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:52,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:52,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132695742] [2023-08-31 01:16:52,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132695742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:52,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:52,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:16:52,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409235232] [2023-08-31 01:16:52,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:52,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:16:52,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:16:52,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:16:52,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 771 [2023-08-31 01:16:52,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:52,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:52,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 771 [2023-08-31 01:16:52,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:52,640 INFO L130 PetriNetUnfolder]: 462/680 cut-off events. [2023-08-31 01:16:52,640 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-31 01:16:52,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2167 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2023-08-31 01:16:52,644 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2023-08-31 01:16:52,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2023-08-31 01:16:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:16:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:16:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1328 transitions. [2023-08-31 01:16:52,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43060959792477305 [2023-08-31 01:16:52,647 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1328 transitions. [2023-08-31 01:16:52,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1328 transitions. [2023-08-31 01:16:52,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:52,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1328 transitions. [2023-08-31 01:16:52,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:52,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:52,657 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:52,658 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1328 transitions. [2023-08-31 01:16:52,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2023-08-31 01:16:52,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 01:16:52,661 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-08-31 01:16:52,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-31 01:16:52,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-31 01:16:52,664 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-08-31 01:16:52,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:52,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:52,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:52,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 01:16:52,673 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)] === [2023-08-31 01:16:52,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:52,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1499019307, now seen corresponding path program 1 times [2023-08-31 01:16:52,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:52,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652951697] [2023-08-31 01:16:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:52,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:16:54,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:54,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652951697] [2023-08-31 01:16:54,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652951697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:54,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463214501] [2023-08-31 01:16:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:54,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:54,533 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) [2023-08-31 01:16:54,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:16:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:54,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 01:16:54,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:55,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 138 [2023-08-31 01:16:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:56,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:57,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:16:57,781 INFO L350 Elim1Store]: Elim1 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 200 treesize of output 108 [2023-08-31 01:16:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:57,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463214501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:16:57,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:16:57,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 32 [2023-08-31 01:16:57,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467343241] [2023-08-31 01:16:57,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:16:57,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 01:16:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:57,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 01:16:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 01:17:01,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 771 [2023-08-31 01:17:01,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 33 states, 33 states have (on average 266.1515151515151) internal successors, (8783), 33 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:01,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:01,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 771 [2023-08-31 01:17:01,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:22,955 INFO L130 PetriNetUnfolder]: 2871/4544 cut-off events. [2023-08-31 01:17:22,955 INFO L131 PetriNetUnfolder]: For 1055/1055 co-relation queries the response was YES. [2023-08-31 01:17:22,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 4544 events. 2871/4544 cut-off events. For 1055/1055 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25278 event pairs, 148 based on Foata normal form. 15/3302 useless extension candidates. Maximal degree in co-relation 11225. Up to 1113 conditions per place. [2023-08-31 01:17:22,979 INFO L137 encePairwiseOnDemand]: 758/771 looper letters, 603 selfloop transitions, 231 changer transitions 99/933 dead transitions. [2023-08-31 01:17:22,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 933 transitions, 4425 flow [2023-08-31 01:17:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-08-31 01:17:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-08-31 01:17:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 30505 transitions. [2023-08-31 01:17:23,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35326338706688903 [2023-08-31 01:17:23,045 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 30505 transitions. [2023-08-31 01:17:23,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 30505 transitions. [2023-08-31 01:17:23,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:23,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 30505 transitions. [2023-08-31 01:17:23,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 272.36607142857144) internal successors, (30505), 112 states have internal predecessors, (30505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:23,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:23,241 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:23,242 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 112 states and 30505 transitions. [2023-08-31 01:17:23,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 933 transitions, 4425 flow [2023-08-31 01:17:23,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 933 transitions, 4305 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-08-31 01:17:23,262 INFO L231 Difference]: Finished difference. Result has 216 places, 271 transitions, 1851 flow [2023-08-31 01:17:23,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=1851, PETRI_PLACES=216, PETRI_TRANSITIONS=271} [2023-08-31 01:17:23,264 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2023-08-31 01:17:23,264 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 271 transitions, 1851 flow [2023-08-31 01:17:23,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 266.1515151515151) internal successors, (8783), 33 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:23,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:23,267 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:23,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 01:17:23,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:23,473 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)] === [2023-08-31 01:17:23,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash -99656019, now seen corresponding path program 2 times [2023-08-31 01:17:23,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:23,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356345603] [2023-08-31 01:17:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:23,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:24,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:24,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356345603] [2023-08-31 01:17:24,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356345603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:24,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313626229] [2023-08-31 01:17:24,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:17:24,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:24,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:24,848 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) [2023-08-31 01:17:24,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:17:24,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:17:24,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:24,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-31 01:17:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:25,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:17:25,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 90 [2023-08-31 01:17:26,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 115 [2023-08-31 01:17:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:26,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:27,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:27,548 INFO L350 Elim1Store]: Elim1 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 219 treesize of output 139 [2023-08-31 01:17:27,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-08-31 01:17:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313626229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:27,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:27,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-31 01:17:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053590718] [2023-08-31 01:17:27,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:27,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 01:17:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:27,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 01:17:27,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1075, Unknown=1, NotChecked=0, Total=1190 [2023-08-31 01:17:30,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-08-31 01:17:30,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 271 transitions, 1851 flow. Second operand has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:30,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:30,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-08-31 01:17:30,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:43,823 INFO L130 PetriNetUnfolder]: 6428/10131 cut-off events. [2023-08-31 01:17:43,824 INFO L131 PetriNetUnfolder]: For 601915/601915 co-relation queries the response was YES. [2023-08-31 01:17:43,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109709 conditions, 10131 events. 6428/10131 cut-off events. For 601915/601915 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 64574 event pairs, 460 based on Foata normal form. 5/8713 useless extension candidates. Maximal degree in co-relation 109612. Up to 3098 conditions per place. [2023-08-31 01:17:43,968 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 416 selfloop transitions, 522 changer transitions 25/963 dead transitions. [2023-08-31 01:17:43,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 963 transitions, 11580 flow [2023-08-31 01:17:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-31 01:17:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-31 01:17:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 12488 transitions. [2023-08-31 01:17:43,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31759110907657484 [2023-08-31 01:17:43,986 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 12488 transitions. [2023-08-31 01:17:43,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 12488 transitions. [2023-08-31 01:17:43,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:43,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 12488 transitions. [2023-08-31 01:17:44,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 244.86274509803923) internal successors, (12488), 51 states have internal predecessors, (12488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:44,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:44,045 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:44,045 INFO L175 Difference]: Start difference. First operand has 216 places, 271 transitions, 1851 flow. Second operand 51 states and 12488 transitions. [2023-08-31 01:17:44,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 963 transitions, 11580 flow [2023-08-31 01:17:46,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 963 transitions, 10471 flow, removed 518 selfloop flow, removed 17 redundant places. [2023-08-31 01:17:46,261 INFO L231 Difference]: Finished difference. Result has 254 places, 671 transitions, 8994 flow [2023-08-31 01:17:46,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8994, PETRI_PLACES=254, PETRI_TRANSITIONS=671} [2023-08-31 01:17:46,262 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2023-08-31 01:17:46,262 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 671 transitions, 8994 flow [2023-08-31 01:17:46,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:46,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:46,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:46,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 01:17:46,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:46,473 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)] === [2023-08-31 01:17:46,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:46,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1692020307, now seen corresponding path program 3 times [2023-08-31 01:17:46,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:46,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859680482] [2023-08-31 01:17:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:46,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:47,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:47,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859680482] [2023-08-31 01:17:47,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859680482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:47,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878720529] [2023-08-31 01:17:47,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:17:47,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:47,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:47,349 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) [2023-08-31 01:17:47,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:17:47,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:17:47,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 01:17:47,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:48,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 89 [2023-08-31 01:17:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:48,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:49,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:49,144 INFO L350 Elim1Store]: Elim1 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 136 treesize of output 76 [2023-08-31 01:17:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878720529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:49,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:49,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-31 01:17:49,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968915321] [2023-08-31 01:17:49,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:49,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 01:17:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 01:17:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-08-31 01:17:50,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 771 [2023-08-31 01:17:50,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 671 transitions, 8994 flow. Second operand has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:50,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:50,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 771 [2023-08-31 01:17:50,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:55,753 INFO L130 PetriNetUnfolder]: 8336/12983 cut-off events. [2023-08-31 01:17:55,753 INFO L131 PetriNetUnfolder]: For 877237/877237 co-relation queries the response was YES. [2023-08-31 01:17:55,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147306 conditions, 12983 events. 8336/12983 cut-off events. For 877237/877237 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83351 event pairs, 1143 based on Foata normal form. 8/11887 useless extension candidates. Maximal degree in co-relation 147205. Up to 3916 conditions per place. [2023-08-31 01:17:55,904 INFO L137 encePairwiseOnDemand]: 761/771 looper letters, 962 selfloop transitions, 361 changer transitions 71/1394 dead transitions. [2023-08-31 01:17:55,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1394 transitions, 30002 flow [2023-08-31 01:17:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 01:17:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 01:17:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 8591 transitions. [2023-08-31 01:17:55,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842300639563487 [2023-08-31 01:17:55,915 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 8591 transitions. [2023-08-31 01:17:55,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 8591 transitions. [2023-08-31 01:17:55,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:55,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 8591 transitions. [2023-08-31 01:17:55,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 296.2413793103448) internal successors, (8591), 29 states have internal predecessors, (8591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:55,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:55,944 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:55,944 INFO L175 Difference]: Start difference. First operand has 254 places, 671 transitions, 8994 flow. Second operand 29 states and 8591 transitions. [2023-08-31 01:17:55,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1394 transitions, 30002 flow [2023-08-31 01:18:27,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1394 transitions, 13642 flow, removed 8142 selfloop flow, removed 4 redundant places. [2023-08-31 01:18:27,045 INFO L231 Difference]: Finished difference. Result has 297 places, 875 transitions, 7455 flow [2023-08-31 01:18:27,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7455, PETRI_PLACES=297, PETRI_TRANSITIONS=875} [2023-08-31 01:18:27,046 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2023-08-31 01:18:27,046 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 875 transitions, 7455 flow [2023-08-31 01:18:27,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:27,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:27,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:27,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 01:18:27,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:27,248 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)] === [2023-08-31 01:18:27,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1447694667, now seen corresponding path program 4 times [2023-08-31 01:18:27,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:27,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835677068] [2023-08-31 01:18:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:27,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:28,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835677068] [2023-08-31 01:18:28,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835677068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124016387] [2023-08-31 01:18:28,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:18:28,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:28,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:28,077 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) [2023-08-31 01:18:28,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:18:28,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:18:28,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:18:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:28,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:18:28,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-08-31 01:18:28,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 81 [2023-08-31 01:18:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:29,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:30,005 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (or (< (+ 2147483647 c_~name_1~0) c_~name_2~0) (<= c_~name_2~0 c_~name_1~0) (forall ((v_ArrVal_326 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_1~0)))) (<= c_~result_4~0 0)) is different from false [2023-08-31 01:18:30,208 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (let ((.cse0 (= c_~break_7~0 0))) (and (or .cse0 (<= c_~result_4~0 0)) (or (<= c_~name_1~0 c_~name_2~0) (< (+ 2147483647 c_~name_2~0) c_~name_1~0) (< c_~i_5~0 3) (not .cse0)))) (and (forall ((v_ArrVal_326 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (or (< (+ 2147483647 c_~name_1~0) c_~name_2~0) (<= c_~name_2~0 c_~name_1~0) (forall ((v_ArrVal_326 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_1~0))))) is different from false [2023-08-31 01:18:30,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:30,337 INFO L350 Elim1Store]: Elim1 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 212 treesize of output 132 [2023-08-31 01:18:30,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2023-08-31 01:18:30,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-08-31 01:18:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-31 01:18:30,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124016387] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:30,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:30,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-31 01:18:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340627791] [2023-08-31 01:18:30,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 01:18:30,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 01:18:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=8, NotChecked=118, Total=1056 [2023-08-31 01:18:30,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-08-31 01:18:30,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 875 transitions, 7455 flow. Second operand has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:30,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:30,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-08-31 01:18:30,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:42,732 INFO L130 PetriNetUnfolder]: 13749/21844 cut-off events. [2023-08-31 01:18:42,732 INFO L131 PetriNetUnfolder]: For 240435/240435 co-relation queries the response was YES. [2023-08-31 01:18:42,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118823 conditions, 21844 events. 13749/21844 cut-off events. For 240435/240435 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 157779 event pairs, 1668 based on Foata normal form. 21/20057 useless extension candidates. Maximal degree in co-relation 118715. Up to 4592 conditions per place. [2023-08-31 01:18:42,970 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 1167 selfloop transitions, 668 changer transitions 73/1908 dead transitions. [2023-08-31 01:18:42,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1908 transitions, 21276 flow [2023-08-31 01:18:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 01:18:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 01:18:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 8895 transitions. [2023-08-31 01:18:42,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32047124945957634 [2023-08-31 01:18:42,981 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 8895 transitions. [2023-08-31 01:18:42,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 8895 transitions. [2023-08-31 01:18:42,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:42,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 8895 transitions. [2023-08-31 01:18:42,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 247.08333333333334) internal successors, (8895), 36 states have internal predecessors, (8895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:43,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 771.0) internal successors, (28527), 37 states have internal predecessors, (28527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:43,015 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 771.0) internal successors, (28527), 37 states have internal predecessors, (28527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:43,015 INFO L175 Difference]: Start difference. First operand has 297 places, 875 transitions, 7455 flow. Second operand 36 states and 8895 transitions. [2023-08-31 01:18:43,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1908 transitions, 21276 flow [2023-08-31 01:18:46,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1908 transitions, 20865 flow, removed 179 selfloop flow, removed 8 redundant places. [2023-08-31 01:18:46,128 INFO L231 Difference]: Finished difference. Result has 341 places, 1237 transitions, 13386 flow [2023-08-31 01:18:46,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13386, PETRI_PLACES=341, PETRI_TRANSITIONS=1237} [2023-08-31 01:18:46,129 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 311 predicate places. [2023-08-31 01:18:46,129 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1237 transitions, 13386 flow [2023-08-31 01:18:46,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:46,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:46,131 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:46,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:46,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:46,331 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)] === [2023-08-31 01:18:46,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:46,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1234564250, now seen corresponding path program 5 times [2023-08-31 01:18:46,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:46,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479351088] [2023-08-31 01:18:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:46,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:18:47,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:47,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479351088] [2023-08-31 01:18:47,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479351088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:47,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23039636] [2023-08-31 01:18:47,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:18:47,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:47,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:47,755 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) [2023-08-31 01:18:47,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:18:47,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:18:47,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:18:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:48,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 72 [2023-08-31 01:18:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:48,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:48,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:48,841 INFO L350 Elim1Store]: Elim1 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 117 treesize of output 69 [2023-08-31 01:18:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:48,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23039636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:48,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:48,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 31 [2023-08-31 01:18:48,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970239710] [2023-08-31 01:18:48,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:48,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:18:48,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:18:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-08-31 01:18:51,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 771 [2023-08-31 01:18:51,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1237 transitions, 13386 flow. Second operand has 31 states, 31 states have (on average 276.1290322580645) internal successors, (8560), 31 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:51,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:51,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 771 [2023-08-31 01:18:51,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:04,463 INFO L130 PetriNetUnfolder]: 17724/29221 cut-off events. [2023-08-31 01:19:04,464 INFO L131 PetriNetUnfolder]: For 405257/405257 co-relation queries the response was YES. [2023-08-31 01:19:04,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176807 conditions, 29221 events. 17724/29221 cut-off events. For 405257/405257 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 233697 event pairs, 3151 based on Foata normal form. 64/26735 useless extension candidates. Maximal degree in co-relation 176668. Up to 10768 conditions per place. [2023-08-31 01:19:04,952 INFO L137 encePairwiseOnDemand]: 757/771 looper letters, 1573 selfloop transitions, 697 changer transitions 27/2297 dead transitions. [2023-08-31 01:19:04,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 2297 transitions, 30541 flow [2023-08-31 01:19:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 01:19:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 01:19:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 11639 transitions. [2023-08-31 01:19:04,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36819461579829804 [2023-08-31 01:19:04,975 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 11639 transitions. [2023-08-31 01:19:04,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 11639 transitions. [2023-08-31 01:19:04,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:04,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 11639 transitions. [2023-08-31 01:19:04,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 283.8780487804878) internal successors, (11639), 41 states have internal predecessors, (11639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:05,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:05,031 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:05,032 INFO L175 Difference]: Start difference. First operand has 341 places, 1237 transitions, 13386 flow. Second operand 41 states and 11639 transitions. [2023-08-31 01:19:05,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 2297 transitions, 30541 flow [2023-08-31 01:19:13,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 2297 transitions, 27987 flow, removed 1249 selfloop flow, removed 8 redundant places. [2023-08-31 01:19:13,483 INFO L231 Difference]: Finished difference. Result has 397 places, 1552 transitions, 19131 flow [2023-08-31 01:19:13,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=12424, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=19131, PETRI_PLACES=397, PETRI_TRANSITIONS=1552} [2023-08-31 01:19:13,485 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2023-08-31 01:19:13,485 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1552 transitions, 19131 flow [2023-08-31 01:19:13,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 276.1290322580645) internal successors, (8560), 31 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:13,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:13,487 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:13,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:13,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:13,689 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)] === [2023-08-31 01:19:13,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:13,690 INFO L85 PathProgramCache]: Analyzing trace with hash -791885760, now seen corresponding path program 6 times [2023-08-31 01:19:13,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:13,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863037938] [2023-08-31 01:19:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:13,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:19:14,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:14,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863037938] [2023-08-31 01:19:14,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863037938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:14,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848708755] [2023-08-31 01:19:14,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:19:14,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:14,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:14,945 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) [2023-08-31 01:19:14,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:19:15,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:19:15,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:15,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 01:19:15,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:15,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 72 [2023-08-31 01:19:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:15,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:16,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:16,361 INFO L350 Elim1Store]: Elim1 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 117 treesize of output 69 [2023-08-31 01:19:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848708755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:16,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:16,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-31 01:19:16,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892301191] [2023-08-31 01:19:16,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:16,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:19:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:19:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2023-08-31 01:19:18,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 771 [2023-08-31 01:19:18,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1552 transitions, 19131 flow. Second operand has 31 states, 31 states have (on average 275.1290322580645) internal successors, (8529), 31 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:18,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:18,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 771 [2023-08-31 01:19:18,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:33,132 INFO L130 PetriNetUnfolder]: 19652/32601 cut-off events. [2023-08-31 01:19:33,132 INFO L131 PetriNetUnfolder]: For 584593/584593 co-relation queries the response was YES. [2023-08-31 01:19:34,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221645 conditions, 32601 events. 19652/32601 cut-off events. For 584593/584593 co-relation queries the response was YES. Maximal size of possible extension queue 1750. Compared 267281 event pairs, 3374 based on Foata normal form. 60/29599 useless extension candidates. Maximal degree in co-relation 221483. Up to 11973 conditions per place. [2023-08-31 01:19:34,167 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 1528 selfloop transitions, 696 changer transitions 1/2225 dead transitions. [2023-08-31 01:19:34,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 2225 transitions, 32568 flow [2023-08-31 01:19:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:19:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:19:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 6238 transitions. [2023-08-31 01:19:34,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3677632354675156 [2023-08-31 01:19:34,173 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 6238 transitions. [2023-08-31 01:19:34,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 6238 transitions. [2023-08-31 01:19:34,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:34,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 6238 transitions. [2023-08-31 01:19:34,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 283.54545454545456) internal successors, (6238), 22 states have internal predecessors, (6238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:34,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 771.0) internal successors, (17733), 23 states have internal predecessors, (17733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:34,192 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 771.0) internal successors, (17733), 23 states have internal predecessors, (17733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:34,192 INFO L175 Difference]: Start difference. First operand has 397 places, 1552 transitions, 19131 flow. Second operand 22 states and 6238 transitions. [2023-08-31 01:19:34,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 2225 transitions, 32568 flow [2023-08-31 01:19:49,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 2225 transitions, 31112 flow, removed 681 selfloop flow, removed 13 redundant places. [2023-08-31 01:19:49,981 INFO L231 Difference]: Finished difference. Result has 414 places, 1708 transitions, 23194 flow [2023-08-31 01:19:49,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=17851, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=23194, PETRI_PLACES=414, PETRI_TRANSITIONS=1708} [2023-08-31 01:19:49,984 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 384 predicate places. [2023-08-31 01:19:49,984 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1708 transitions, 23194 flow [2023-08-31 01:19:49,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 275.1290322580645) internal successors, (8529), 31 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:49,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:49,985 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:49,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:50,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:50,191 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)] === [2023-08-31 01:19:50,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1590517810, now seen corresponding path program 7 times [2023-08-31 01:19:50,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:50,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699157642] [2023-08-31 01:19:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:50,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699157642] [2023-08-31 01:19:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699157642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:50,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189756361] [2023-08-31 01:19:50,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:19:50,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:50,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:50,850 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) [2023-08-31 01:19:50,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:19:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:50,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-31 01:19:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:51,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 80 [2023-08-31 01:19:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:51,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:52,222 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 01:19:52,223 INFO L350 Elim1Store]: Elim1 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 109 treesize of output 56 [2023-08-31 01:19:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:52,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189756361] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:52,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:52,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-08-31 01:19:52,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916766727] [2023-08-31 01:19:52,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:52,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:19:52,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:19:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-08-31 01:19:54,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 771 [2023-08-31 01:19:54,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1708 transitions, 23194 flow. Second operand has 28 states, 28 states have (on average 277.39285714285717) internal successors, (7767), 28 states have internal predecessors, (7767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:54,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:54,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 771 [2023-08-31 01:19:54,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:10,034 INFO L130 PetriNetUnfolder]: 19546/32381 cut-off events. [2023-08-31 01:20:10,034 INFO L131 PetriNetUnfolder]: For 694504/694504 co-relation queries the response was YES. [2023-08-31 01:20:10,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238080 conditions, 32381 events. 19546/32381 cut-off events. For 694504/694504 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 263486 event pairs, 3801 based on Foata normal form. 170/29891 useless extension candidates. Maximal degree in co-relation 237916. Up to 17228 conditions per place. [2023-08-31 01:20:10,626 INFO L137 encePairwiseOnDemand]: 760/771 looper letters, 1602 selfloop transitions, 628 changer transitions 3/2233 dead transitions. [2023-08-31 01:20:10,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 2233 transitions, 34727 flow [2023-08-31 01:20:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 01:20:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 01:20:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 9387 transitions. [2023-08-31 01:20:10,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36894234170498763 [2023-08-31 01:20:10,633 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 9387 transitions. [2023-08-31 01:20:10,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 9387 transitions. [2023-08-31 01:20:10,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:10,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 9387 transitions. [2023-08-31 01:20:10,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 284.45454545454544) internal successors, (9387), 33 states have internal predecessors, (9387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:10,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 771.0) internal successors, (26214), 34 states have internal predecessors, (26214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:10,661 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 771.0) internal successors, (26214), 34 states have internal predecessors, (26214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:10,661 INFO L175 Difference]: Start difference. First operand has 414 places, 1708 transitions, 23194 flow. Second operand 33 states and 9387 transitions. [2023-08-31 01:20:10,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 2233 transitions, 34727 flow [2023-08-31 01:20:27,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 2233 transitions, 33484 flow, removed 471 selfloop flow, removed 12 redundant places. [2023-08-31 01:20:27,395 INFO L231 Difference]: Finished difference. Result has 445 places, 1762 transitions, 24887 flow [2023-08-31 01:20:27,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=22172, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=24887, PETRI_PLACES=445, PETRI_TRANSITIONS=1762} [2023-08-31 01:20:27,397 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 415 predicate places. [2023-08-31 01:20:27,397 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1762 transitions, 24887 flow [2023-08-31 01:20:27,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 277.39285714285717) internal successors, (7767), 28 states have internal predecessors, (7767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:27,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:20:27,398 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:20:27,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 01:20:27,604 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,SelfDestructingSolverStorable10 [2023-08-31 01:20:27,605 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)] === [2023-08-31 01:20:27,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:20:27,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1714295696, now seen corresponding path program 8 times [2023-08-31 01:20:27,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:20:27,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903870745] [2023-08-31 01:20:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:20:27,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:20:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:28,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:20:28,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903870745] [2023-08-31 01:20:28,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903870745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:20:28,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186905363] [2023-08-31 01:20:28,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:20:28,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:28,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:20:28,194 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:20:28,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 01:20:28,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:20:28,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:20:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 01:20:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:20:28,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 78 [2023-08-31 01:20:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:28,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:20:29,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:20:29,067 INFO L350 Elim1Store]: Elim1 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 117 treesize of output 69 [2023-08-31 01:20:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:29,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186905363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:20:29,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:20:29,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2023-08-31 01:20:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771973860] [2023-08-31 01:20:29,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:20:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:20:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:20:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:20:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:20:30,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 771 [2023-08-31 01:20:30,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1762 transitions, 24887 flow. Second operand has 23 states, 23 states have (on average 291.17391304347825) internal successors, (6697), 23 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:30,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:20:30,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 771 [2023-08-31 01:20:30,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:47,674 INFO L130 PetriNetUnfolder]: 20477/33896 cut-off events. [2023-08-31 01:20:47,674 INFO L131 PetriNetUnfolder]: For 713737/713737 co-relation queries the response was YES. [2023-08-31 01:20:48,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251655 conditions, 33896 events. 20477/33896 cut-off events. For 713737/713737 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 277767 event pairs, 5474 based on Foata normal form. 72/31184 useless extension candidates. Maximal degree in co-relation 251483. Up to 21954 conditions per place. [2023-08-31 01:20:48,500 INFO L137 encePairwiseOnDemand]: 760/771 looper letters, 1890 selfloop transitions, 370 changer transitions 0/2260 dead transitions. [2023-08-31 01:20:48,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 2260 transitions, 35918 flow [2023-08-31 01:20:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 01:20:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 01:20:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7811 transitions. [2023-08-31 01:20:48,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38965379626858226 [2023-08-31 01:20:48,508 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7811 transitions. [2023-08-31 01:20:48,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7811 transitions. [2023-08-31 01:20:48,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:48,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7811 transitions. [2023-08-31 01:20:48,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 300.4230769230769) internal successors, (7811), 26 states have internal predecessors, (7811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:48,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 771.0) internal successors, (20817), 27 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:48,535 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 771.0) internal successors, (20817), 27 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:48,535 INFO L175 Difference]: Start difference. First operand has 445 places, 1762 transitions, 24887 flow. Second operand 26 states and 7811 transitions. [2023-08-31 01:20:48,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 2260 transitions, 35918 flow [2023-08-31 01:21:05,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2260 transitions, 34807 flow, removed 405 selfloop flow, removed 9 redundant places. [2023-08-31 01:21:05,469 INFO L231 Difference]: Finished difference. Result has 469 places, 1806 transitions, 25847 flow [2023-08-31 01:21:05,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=24109, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=25847, PETRI_PLACES=469, PETRI_TRANSITIONS=1806} [2023-08-31 01:21:05,472 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 439 predicate places. [2023-08-31 01:21:05,472 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1806 transitions, 25847 flow [2023-08-31 01:21:05,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 291.17391304347825) internal successors, (6697), 23 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:05,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:21:05,473 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:21:05,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 01:21:05,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:05,679 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)] === [2023-08-31 01:21:05,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:21:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1663316273, now seen corresponding path program 9 times [2023-08-31 01:21:05,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:21:05,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443514332] [2023-08-31 01:21:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:21:05,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:21:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:21:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:06,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:21:06,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443514332] [2023-08-31 01:21:06,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443514332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:21:06,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236119254] [2023-08-31 01:21:06,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:21:06,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:06,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:21:06,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:21:06,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 01:21:06,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:21:06,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:21:06,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 01:21:06,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:21:06,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 99 [2023-08-31 01:21:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:07,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:21:07,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:21:07,708 INFO L350 Elim1Store]: Elim1 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 164 treesize of output 92 [2023-08-31 01:21:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236119254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:21:08,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:21:08,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 27 [2023-08-31 01:21:08,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184742177] [2023-08-31 01:21:08,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:21:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:21:08,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:21:08,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:21:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-08-31 01:21:10,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 771 [2023-08-31 01:21:10,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1806 transitions, 25847 flow. Second operand has 28 states, 28 states have (on average 275.4642857142857) internal successors, (7713), 28 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:10,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:21:10,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 771 [2023-08-31 01:21:10,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:21:38,863 INFO L130 PetriNetUnfolder]: 30907/52503 cut-off events. [2023-08-31 01:21:38,863 INFO L131 PetriNetUnfolder]: For 919683/919683 co-relation queries the response was YES. [2023-08-31 01:21:40,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373771 conditions, 52503 events. 30907/52503 cut-off events. For 919683/919683 co-relation queries the response was YES. Maximal size of possible extension queue 2818. Compared 475643 event pairs, 3029 based on Foata normal form. 39/46586 useless extension candidates. Maximal degree in co-relation 373590. Up to 23670 conditions per place. [2023-08-31 01:21:40,958 INFO L137 encePairwiseOnDemand]: 760/771 looper letters, 1976 selfloop transitions, 1471 changer transitions 206/3653 dead transitions. [2023-08-31 01:21:40,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 3653 transitions, 58010 flow [2023-08-31 01:21:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-31 01:21:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-31 01:21:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 14009 transitions. [2023-08-31 01:21:40,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633981841763943 [2023-08-31 01:21:40,968 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 14009 transitions. [2023-08-31 01:21:40,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 14009 transitions. [2023-08-31 01:21:40,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:21:40,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 14009 transitions. [2023-08-31 01:21:40,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 280.18) internal successors, (14009), 50 states have internal predecessors, (14009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:41,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 771.0) internal successors, (39321), 51 states have internal predecessors, (39321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:41,011 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 771.0) internal successors, (39321), 51 states have internal predecessors, (39321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:41,011 INFO L175 Difference]: Start difference. First operand has 469 places, 1806 transitions, 25847 flow. Second operand 50 states and 14009 transitions. [2023-08-31 01:21:41,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 3653 transitions, 58010 flow [2023-08-31 01:22:02,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 3653 transitions, 57136 flow, removed 27 selfloop flow, removed 11 redundant places. [2023-08-31 01:22:02,875 INFO L231 Difference]: Finished difference. Result has 532 places, 2572 transitions, 42344 flow [2023-08-31 01:22:02,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=25442, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=953, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=42344, PETRI_PLACES=532, PETRI_TRANSITIONS=2572} [2023-08-31 01:22:02,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 502 predicate places. [2023-08-31 01:22:02,877 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 2572 transitions, 42344 flow [2023-08-31 01:22:02,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 275.4642857142857) internal successors, (7713), 28 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:02,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:02,878 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:02,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 01:22:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 01:22:03,087 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)] === [2023-08-31 01:22:03,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash -886775817, now seen corresponding path program 10 times [2023-08-31 01:22:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:03,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275598303] [2023-08-31 01:22:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:03,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:03,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:03,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275598303] [2023-08-31 01:22:03,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275598303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:22:03,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050033662] [2023-08-31 01:22:03,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:22:03,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:03,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:22:03,664 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:22:03,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 01:22:03,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:22:03,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:22:03,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 01:22:03,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:22:04,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 80 [2023-08-31 01:22:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:04,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:22:04,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:22:04,924 INFO L350 Elim1Store]: Elim1 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 223 treesize of output 119 [2023-08-31 01:22:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:05,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050033662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:22:05,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:22:05,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-31 01:22:05,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130027213] [2023-08-31 01:22:05,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:22:05,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 01:22:05,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:05,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 01:22:05,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-08-31 01:22:06,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 771 [2023-08-31 01:22:06,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 2572 transitions, 42344 flow. Second operand has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:06,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:06,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 771 [2023-08-31 01:22:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:50,202 INFO L130 PetriNetUnfolder]: 40045/67977 cut-off events. [2023-08-31 01:22:50,202 INFO L131 PetriNetUnfolder]: For 1557291/1557291 co-relation queries the response was YES. [2023-08-31 01:22:53,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544806 conditions, 67977 events. 40045/67977 cut-off events. For 1557291/1557291 co-relation queries the response was YES. Maximal size of possible extension queue 3688. Compared 633313 event pairs, 7564 based on Foata normal form. 50/61383 useless extension candidates. Maximal degree in co-relation 544599. Up to 25347 conditions per place. [2023-08-31 01:22:53,675 INFO L137 encePairwiseOnDemand]: 761/771 looper letters, 1774 selfloop transitions, 1935 changer transitions 127/3836 dead transitions. [2023-08-31 01:22:53,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 3836 transitions, 71516 flow [2023-08-31 01:22:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 01:22:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 01:22:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 9162 transitions. [2023-08-31 01:22:53,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333124137065394 [2023-08-31 01:22:53,681 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 9162 transitions. [2023-08-31 01:22:53,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 9162 transitions. [2023-08-31 01:22:53,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:53,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 9162 transitions. [2023-08-31 01:22:53,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 295.5483870967742) internal successors, (9162), 31 states have internal predecessors, (9162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:53,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 771.0) internal successors, (24672), 32 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:53,706 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 771.0) internal successors, (24672), 32 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:53,707 INFO L175 Difference]: Start difference. First operand has 532 places, 2572 transitions, 42344 flow. Second operand 31 states and 9162 transitions. [2023-08-31 01:22:53,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 3836 transitions, 71516 flow [2023-08-31 01:24:50,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 3836 transitions, 68581 flow, removed 1450 selfloop flow, removed 12 redundant places. [2023-08-31 01:24:50,081 INFO L231 Difference]: Finished difference. Result has 549 places, 3115 transitions, 56418 flow [2023-08-31 01:24:50,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=40895, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1006, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=56418, PETRI_PLACES=549, PETRI_TRANSITIONS=3115} [2023-08-31 01:24:50,082 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 519 predicate places. [2023-08-31 01:24:50,083 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 3115 transitions, 56418 flow [2023-08-31 01:24:50,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:50,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:24:50,084 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:24:50,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 01:24:50,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 01:24:50,284 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)] === [2023-08-31 01:24:50,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:24:50,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1934763223, now seen corresponding path program 11 times [2023-08-31 01:24:50,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:24:50,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546393225] [2023-08-31 01:24:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:24:50,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:24:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:24:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:24:50,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:24:50,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546393225] [2023-08-31 01:24:50,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546393225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:24:50,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520730253] [2023-08-31 01:24:50,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:24:50,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:24:50,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:24:50,821 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:24:50,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 01:24:50,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:24:50,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:24:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:24:50,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:24:51,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 84 [2023-08-31 01:24:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:24:51,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:24:52,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:24:52,498 INFO L350 Elim1Store]: Elim1 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 108 treesize of output 68 [2023-08-31 01:24:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:24:52,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520730253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:24:52,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:24:52,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-08-31 01:24:52,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063586386] [2023-08-31 01:24:52,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:24:52,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 01:24:52,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:24:52,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 01:24:52,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:24:55,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 771 [2023-08-31 01:24:55,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 3115 transitions, 56418 flow. Second operand has 26 states, 26 states have (on average 274.34615384615387) internal successors, (7133), 26 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:55,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:24:55,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 771 [2023-08-31 01:24:55,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:25:54,497 INFO L130 PetriNetUnfolder]: 42508/75246 cut-off events. [2023-08-31 01:25:54,497 INFO L131 PetriNetUnfolder]: For 1693035/1693035 co-relation queries the response was YES. [2023-08-31 01:25:57,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566404 conditions, 75246 events. 42508/75246 cut-off events. For 1693035/1693035 co-relation queries the response was YES. Maximal size of possible extension queue 4199. Compared 751658 event pairs, 8773 based on Foata normal form. 23/69733 useless extension candidates. Maximal degree in co-relation 566190. Up to 30023 conditions per place. [2023-08-31 01:25:58,172 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 2160 selfloop transitions, 1926 changer transitions 57/4143 dead transitions. [2023-08-31 01:25:58,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 4143 transitions, 80468 flow [2023-08-31 01:25:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 01:25:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 01:25:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 9844 transitions. [2023-08-31 01:25:58,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3647952566240504 [2023-08-31 01:25:58,178 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 9844 transitions. [2023-08-31 01:25:58,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 9844 transitions. [2023-08-31 01:25:58,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:25:58,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 9844 transitions. [2023-08-31 01:25:58,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 281.25714285714287) internal successors, (9844), 35 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:58,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 771.0) internal successors, (27756), 36 states have internal predecessors, (27756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:58,195 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 771.0) internal successors, (27756), 36 states have internal predecessors, (27756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:58,195 INFO L175 Difference]: Start difference. First operand has 549 places, 3115 transitions, 56418 flow. Second operand 35 states and 9844 transitions. [2023-08-31 01:25:58,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 4143 transitions, 80468 flow [2023-08-31 01:27:37,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 4143 transitions, 78641 flow, removed 842 selfloop flow, removed 10 redundant places. [2023-08-31 01:27:37,451 INFO L231 Difference]: Finished difference. Result has 588 places, 3517 transitions, 68675 flow [2023-08-31 01:27:37,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=54885, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=68675, PETRI_PLACES=588, PETRI_TRANSITIONS=3517} [2023-08-31 01:27:37,453 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 558 predicate places. [2023-08-31 01:27:37,453 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 3517 transitions, 68675 flow [2023-08-31 01:27:37,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 274.34615384615387) internal successors, (7133), 26 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:27:37,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:27:37,454 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:27:37,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-31 01:27:37,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 01:27:37,655 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)] === [2023-08-31 01:27:37,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:27:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash 423070181, now seen corresponding path program 12 times [2023-08-31 01:27:37,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:27:37,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449950425] [2023-08-31 01:27:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:27:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:27:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:27:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:27:38,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:27:38,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449950425] [2023-08-31 01:27:38,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449950425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:27:38,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696591734] [2023-08-31 01:27:38,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:27:38,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:27:38,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:27:38,383 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:27:38,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 01:27:38,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:27:38,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:27:38,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 01:27:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:27:38,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 126 [2023-08-31 01:27:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:27:39,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:27:40,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:27:40,368 INFO L350 Elim1Store]: Elim1 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 247 treesize of output 143 [2023-08-31 01:27:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:27:40,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696591734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:27:40,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:27:40,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-31 01:27:40,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087022955] [2023-08-31 01:27:40,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:27:40,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:27:40,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:27:40,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:27:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-08-31 01:27:42,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 771 [2023-08-31 01:27:42,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 3517 transitions, 68675 flow. Second operand has 28 states, 28 states have (on average 273.14285714285717) internal successors, (7648), 28 states have internal predecessors, (7648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:27:42,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:27:42,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 771 [2023-08-31 01:27:42,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:28:55,863 INFO L130 PetriNetUnfolder]: 44577/79238 cut-off events. [2023-08-31 01:28:55,863 INFO L131 PetriNetUnfolder]: For 1968419/1968419 co-relation queries the response was YES. [2023-08-31 01:29:00,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618479 conditions, 79238 events. 44577/79238 cut-off events. For 1968419/1968419 co-relation queries the response was YES. Maximal size of possible extension queue 4485. Compared 799466 event pairs, 9902 based on Foata normal form. 40/74696 useless extension candidates. Maximal degree in co-relation 618251. Up to 28015 conditions per place. [2023-08-31 01:29:00,577 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 2425 selfloop transitions, 2039 changer transitions 90/4554 dead transitions. [2023-08-31 01:29:00,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 4554 transitions, 92727 flow [2023-08-31 01:29:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-31 01:29:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-31 01:29:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 17053 transitions. [2023-08-31 01:29:00,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36259063171099915 [2023-08-31 01:29:00,586 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 17053 transitions. [2023-08-31 01:29:00,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 17053 transitions. [2023-08-31 01:29:00,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:29:00,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 17053 transitions. [2023-08-31 01:29:00,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 279.55737704918033) internal successors, (17053), 61 states have internal predecessors, (17053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:29:00,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 771.0) internal successors, (47802), 62 states have internal predecessors, (47802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:29:00,620 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 771.0) internal successors, (47802), 62 states have internal predecessors, (47802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:29:00,621 INFO L175 Difference]: Start difference. First operand has 588 places, 3517 transitions, 68675 flow. Second operand 61 states and 17053 transitions. [2023-08-31 01:29:00,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 4554 transitions, 92727 flow Killed by 15