./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/bench-exp2x3.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 ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:30:25,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:30:25,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:30:25,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:30:25,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:30:25,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:30:25,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:30:25,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:30:25,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:30:25,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:30:25,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:30:25,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:30:25,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:30:25,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:30:25,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:30:25,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:30:25,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:30:25,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:30:25,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:30:25,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:30:25,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:30:25,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:30:25,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:30:25,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:30:25,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:30:25,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:30:25,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:30:25,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:30:25,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:30:25,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:30:25,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:30:25,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:30:25,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:30:25,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:30:25,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:30:25,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:30:25,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:30:25,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:30:25,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:30:25,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:30:25,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:30:25,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:30:25,536 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:30:25,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:30:25,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:30:25,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:30:25,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:30:25,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:30:25,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:30:25,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:30:25,546 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:30:25,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:30:25,547 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:30:25,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:30:25,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:30:25,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:30:25,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:30:25,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:30:25,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:30:25,548 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:30:25,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:30:25,548 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:30:25,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:30:25,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:30:25,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:30:25,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:30:25,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:30:25,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:30:25,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:30:25,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:30:25,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:30:25,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:30:25,550 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:30:25,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:30:25,550 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:30:25,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:30:25,550 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:30:25,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:30:25,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:30:25,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:30:25,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:30:25,789 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:30:25,790 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:30:25,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2023-08-30 18:30:26,931 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:30:27,112 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:30:27,112 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2023-08-30 18:30:27,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b011ed33b/b6f3c59bed674065bb9035c78a148456/FLAGc234a72f4 [2023-08-30 18:30:27,150 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b011ed33b/b6f3c59bed674065bb9035c78a148456 [2023-08-30 18:30:27,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:30:27,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:30:27,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:30:27,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:30:27,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:30:27,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a0ecc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27, skipping insertion in model container [2023-08-30 18:30:27,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:30:27,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:30:27,328 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/bench-exp2x3.wvr.c[2237,2250] [2023-08-30 18:30:27,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:30:27,346 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:30:27,384 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/bench-exp2x3.wvr.c[2237,2250] [2023-08-30 18:30:27,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:30:27,395 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:30:27,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27 WrapperNode [2023-08-30 18:30:27,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:30:27,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:30:27,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:30:27,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:30:27,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,422 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-08-30 18:30:27,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:30:27,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:30:27,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:30:27,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:30:27,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,440 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:30:27,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:30:27,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:30:27,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:30:27,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (1/1) ... [2023-08-30 18:30:27,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:30:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:27,492 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) [2023-08-30 18:30:27,499 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 [2023-08-30 18:30:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:30:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 18:30:27,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 18:30:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 18:30:27,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 18:30:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 18:30:27,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 18:30:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 18:30:27,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 18:30:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:30:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:30:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:30:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:30:27,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:30:27,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:30:27,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:30:27,531 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:30:27,600 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:30:27,602 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:30:27,825 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:30:27,830 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:30:27,831 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 18:30:27,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:30:27 BoogieIcfgContainer [2023-08-30 18:30:27,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:30:27,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:30:27,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:30:27,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:30:27,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:30:27" (1/3) ... [2023-08-30 18:30:27,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f161c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:30:27, skipping insertion in model container [2023-08-30 18:30:27,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:30:27" (2/3) ... [2023-08-30 18:30:27,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f161c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:30:27, skipping insertion in model container [2023-08-30 18:30:27,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:30:27" (3/3) ... [2023-08-30 18:30:27,838 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2023-08-30 18:30:27,843 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:30:27,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:30:27,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:30:27,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:30:27,943 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 18:30:27,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 123 transitions, 278 flow [2023-08-30 18:30:28,013 INFO L130 PetriNetUnfolder]: 10/119 cut-off events. [2023-08-30 18:30:28,014 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:30:28,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 119 events. 10/119 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-30 18:30:28,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 123 transitions, 278 flow [2023-08-30 18:30:28,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 107 transitions, 238 flow [2023-08-30 18:30:28,024 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:30:28,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 107 transitions, 238 flow [2023-08-30 18:30:28,032 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 107 transitions, 238 flow [2023-08-30 18:30:28,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2023-08-30 18:30:28,076 INFO L130 PetriNetUnfolder]: 10/107 cut-off events. [2023-08-30 18:30:28,076 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:30:28,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 107 events. 10/107 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-30 18:30:28,078 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2023-08-30 18:30:31,082 INFO L134 LiptonReduction]: Checked pairs total: 1522 [2023-08-30 18:30:31,082 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-30 18:30:31,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:30:31,096 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;@26c9f799, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:30:31,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 18:30:31,101 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2023-08-30 18:30:31,101 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:30:31,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:31,102 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] [2023-08-30 18:30:31,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:31,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:31,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1000817363, now seen corresponding path program 1 times [2023-08-30 18:30:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:31,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74909405] [2023-08-30 18:30:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:31,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:31,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:31,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74909405] [2023-08-30 18:30:31,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74909405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:30:31,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:30:31,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 18:30:31,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112309809] [2023-08-30 18:30:31,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:30:31,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:30:31,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:30:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:30:31,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-30 18:30:31,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:31,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:31,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-30 18:30:31,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:31,803 INFO L130 PetriNetUnfolder]: 497/677 cut-off events. [2023-08-30 18:30:31,804 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 18:30:31,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 677 events. 497/677 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1778 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1016. Up to 471 conditions per place. [2023-08-30 18:30:31,809 INFO L137 encePairwiseOnDemand]: 210/216 looper letters, 41 selfloop transitions, 5 changer transitions 1/47 dead transitions. [2023-08-30 18:30:31,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 233 flow [2023-08-30 18:30:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:30:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:30:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-30 18:30:31,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-30 18:30:31,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-30 18:30:31,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-30 18:30:31,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:31,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-30 18:30:31,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:31,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:31,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:31,832 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 336 transitions. [2023-08-30 18:30:31,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 233 flow [2023-08-30 18:30:31,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 18:30:31,836 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 91 flow [2023-08-30 18:30:31,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-08-30 18:30:31,840 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2023-08-30 18:30:31,840 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 91 flow [2023-08-30 18:30:31,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:31,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:31,841 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, 1] [2023-08-30 18:30:31,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:30:31,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:31,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:31,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1019366599, now seen corresponding path program 1 times [2023-08-30 18:30:31,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:31,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4564463] [2023-08-30 18:30:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:31,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:31,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4564463] [2023-08-30 18:30:31,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4564463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:30:31,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:30:31,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:30:31,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779714192] [2023-08-30 18:30:31,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:30:31,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:30:31,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:30:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:30:32,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-30 18:30:32,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:32,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-30 18:30:32,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:32,182 INFO L130 PetriNetUnfolder]: 693/951 cut-off events. [2023-08-30 18:30:32,183 INFO L131 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2023-08-30 18:30:32,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2416 conditions, 951 events. 693/951 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2792 event pairs, 67 based on Foata normal form. 32/983 useless extension candidates. Maximal degree in co-relation 766. Up to 371 conditions per place. [2023-08-30 18:30:32,203 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 68 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2023-08-30 18:30:32,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 78 transitions, 387 flow [2023-08-30 18:30:32,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:30:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:30:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 552 transitions. [2023-08-30 18:30:32,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-08-30 18:30:32,208 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 552 transitions. [2023-08-30 18:30:32,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 552 transitions. [2023-08-30 18:30:32,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:32,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 552 transitions. [2023-08-30 18:30:32,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,215 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 91 flow. Second operand 5 states and 552 transitions. [2023-08-30 18:30:32,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 78 transitions, 387 flow [2023-08-30 18:30:32,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 78 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:30:32,218 INFO L231 Difference]: Finished difference. Result has 34 places, 36 transitions, 151 flow [2023-08-30 18:30:32,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=34, PETRI_TRANSITIONS=36} [2023-08-30 18:30:32,219 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-30 18:30:32,219 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 36 transitions, 151 flow [2023-08-30 18:30:32,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:32,220 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, 1] [2023-08-30 18:30:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:30:32,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:32,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:32,222 INFO L85 PathProgramCache]: Analyzing trace with hash 539503439, now seen corresponding path program 1 times [2023-08-30 18:30:32,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:32,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196884954] [2023-08-30 18:30:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:32,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:32,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:32,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196884954] [2023-08-30 18:30:32,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196884954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:32,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627757578] [2023-08-30 18:30:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:32,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:32,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:32,342 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) [2023-08-30 18:30:32,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:30:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:30:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:32,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:32,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627757578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:32,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:32,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 18:30:32,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779216705] [2023-08-30 18:30:32,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:32,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:30:32,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:30:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:30:32,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-30 18:30:32,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 151 flow. Second operand has 6 states, 6 states have (on average 100.83333333333333) internal successors, (605), 6 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:32,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-30 18:30:32,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:32,927 INFO L130 PetriNetUnfolder]: 1309/1809 cut-off events. [2023-08-30 18:30:32,928 INFO L131 PetriNetUnfolder]: For 1975/1975 co-relation queries the response was YES. [2023-08-30 18:30:32,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 1809 events. 1309/1809 cut-off events. For 1975/1975 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6397 event pairs, 291 based on Foata normal form. 68/1877 useless extension candidates. Maximal degree in co-relation 2898. Up to 757 conditions per place. [2023-08-30 18:30:32,937 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 98 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2023-08-30 18:30:32,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 106 transitions, 641 flow [2023-08-30 18:30:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:30:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:30:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2023-08-30 18:30:32,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203703703703704 [2023-08-30 18:30:32,939 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2023-08-30 18:30:32,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2023-08-30 18:30:32,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:32,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2023-08-30 18:30:32,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,942 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,942 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 151 flow. Second operand 5 states and 562 transitions. [2023-08-30 18:30:32,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 106 transitions, 641 flow [2023-08-30 18:30:32,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 106 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:30:32,947 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 206 flow [2023-08-30 18:30:32,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-08-30 18:30:32,947 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-30 18:30:32,948 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 206 flow [2023-08-30 18:30:32,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.83333333333333) internal successors, (605), 6 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:32,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:32,948 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, 1] [2023-08-30 18:30:32,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:33,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:33,153 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:33,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:33,154 INFO L85 PathProgramCache]: Analyzing trace with hash -905361945, now seen corresponding path program 2 times [2023-08-30 18:30:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:33,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491986478] [2023-08-30 18:30:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:33,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:33,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:33,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491986478] [2023-08-30 18:30:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491986478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:30:33,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:30:33,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:30:33,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437019666] [2023-08-30 18:30:33,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:30:33,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:30:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:30:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:30:33,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-30 18:30:33,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:33,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-30 18:30:33,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:33,504 INFO L130 PetriNetUnfolder]: 1105/1509 cut-off events. [2023-08-30 18:30:33,504 INFO L131 PetriNetUnfolder]: For 2593/2593 co-relation queries the response was YES. [2023-08-30 18:30:33,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5565 conditions, 1509 events. 1105/1509 cut-off events. For 2593/2593 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5157 event pairs, 89 based on Foata normal form. 26/1535 useless extension candidates. Maximal degree in co-relation 3052. Up to 620 conditions per place. [2023-08-30 18:30:33,511 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 94 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-08-30 18:30:33,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 105 transitions, 697 flow [2023-08-30 18:30:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:30:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:30:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 556 transitions. [2023-08-30 18:30:33,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148148148148148 [2023-08-30 18:30:33,513 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 556 transitions. [2023-08-30 18:30:33,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 556 transitions. [2023-08-30 18:30:33,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:33,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 556 transitions. [2023-08-30 18:30:33,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,516 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,516 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 206 flow. Second operand 5 states and 556 transitions. [2023-08-30 18:30:33,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 105 transitions, 697 flow [2023-08-30 18:30:33,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 105 transitions, 697 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:30:33,522 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 267 flow [2023-08-30 18:30:33,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-30 18:30:33,522 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-08-30 18:30:33,523 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 267 flow [2023-08-30 18:30:33,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:33,523 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, 1] [2023-08-30 18:30:33,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 18:30:33,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:33,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:33,524 INFO L85 PathProgramCache]: Analyzing trace with hash -114084107, now seen corresponding path program 1 times [2023-08-30 18:30:33,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:33,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232461730] [2023-08-30 18:30:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:33,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:33,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:33,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232461730] [2023-08-30 18:30:33,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232461730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:30:33,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:30:33,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:30:33,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056787891] [2023-08-30 18:30:33,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:30:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:30:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:33,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:30:33,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:30:33,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-30 18:30:33,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:33,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-30 18:30:33,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:33,869 INFO L130 PetriNetUnfolder]: 1063/1467 cut-off events. [2023-08-30 18:30:33,879 INFO L131 PetriNetUnfolder]: For 3395/3395 co-relation queries the response was YES. [2023-08-30 18:30:33,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5790 conditions, 1467 events. 1063/1467 cut-off events. For 3395/3395 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5166 event pairs, 83 based on Foata normal form. 42/1509 useless extension candidates. Maximal degree in co-relation 3213. Up to 619 conditions per place. [2023-08-30 18:30:33,913 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 93 selfloop transitions, 8 changer transitions 2/103 dead transitions. [2023-08-30 18:30:33,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 103 transitions, 710 flow [2023-08-30 18:30:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:30:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:30:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-08-30 18:30:33,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-30 18:30:33,915 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-08-30 18:30:33,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-08-30 18:30:33,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:33,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-08-30 18:30:33,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,930 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 267 flow. Second operand 5 states and 555 transitions. [2023-08-30 18:30:33,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 103 transitions, 710 flow [2023-08-30 18:30:33,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 103 transitions, 699 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 18:30:33,935 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 270 flow [2023-08-30 18:30:33,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-30 18:30:33,936 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 16 predicate places. [2023-08-30 18:30:33,936 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 270 flow [2023-08-30 18:30:33,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:33,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:33,936 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, 1] [2023-08-30 18:30:33,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 18:30:33,936 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:33,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:33,937 INFO L85 PathProgramCache]: Analyzing trace with hash 555709242, now seen corresponding path program 1 times [2023-08-30 18:30:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:33,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025579528] [2023-08-30 18:30:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:33,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:34,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:34,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025579528] [2023-08-30 18:30:34,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025579528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425729587] [2023-08-30 18:30:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:34,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:34,037 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) [2023-08-30 18:30:34,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:30:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:30:34,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:34,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:34,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425729587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:34,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:34,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 18:30:34,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103163035] [2023-08-30 18:30:34,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:34,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:30:34,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:30:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:30:34,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-30 18:30:34,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:34,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:34,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-30 18:30:34,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:34,680 INFO L130 PetriNetUnfolder]: 1407/1959 cut-off events. [2023-08-30 18:30:34,681 INFO L131 PetriNetUnfolder]: For 4939/4939 co-relation queries the response was YES. [2023-08-30 18:30:34,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8040 conditions, 1959 events. 1407/1959 cut-off events. For 4939/4939 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7090 event pairs, 287 based on Foata normal form. 72/2031 useless extension candidates. Maximal degree in co-relation 4020. Up to 786 conditions per place. [2023-08-30 18:30:34,691 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 104 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2023-08-30 18:30:34,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 114 transitions, 893 flow [2023-08-30 18:30:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:30:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:30:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-08-30 18:30:34,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512962962962963 [2023-08-30 18:30:34,694 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-08-30 18:30:34,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-08-30 18:30:34,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:34,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-08-30 18:30:34,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:34,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:34,697 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:34,697 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 270 flow. Second operand 5 states and 554 transitions. [2023-08-30 18:30:34,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 114 transitions, 893 flow [2023-08-30 18:30:34,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 114 transitions, 860 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 18:30:34,702 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 315 flow [2023-08-30 18:30:34,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-30 18:30:34,704 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2023-08-30 18:30:34,705 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 315 flow [2023-08-30 18:30:34,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:34,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:34,705 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, 1] [2023-08-30 18:30:34,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:34,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 18:30:34,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:34,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:34,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1193580880, now seen corresponding path program 2 times [2023-08-30 18:30:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:34,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132118382] [2023-08-30 18:30:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:34,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:35,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:35,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132118382] [2023-08-30 18:30:35,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132118382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:30:35,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:30:35,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:30:35,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491813339] [2023-08-30 18:30:35,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:30:35,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:30:35,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:30:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:30:35,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-30 18:30:35,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:35,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:35,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-30 18:30:35,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:35,239 INFO L130 PetriNetUnfolder]: 1237/1713 cut-off events. [2023-08-30 18:30:35,239 INFO L131 PetriNetUnfolder]: For 4450/4450 co-relation queries the response was YES. [2023-08-30 18:30:35,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 1713 events. 1237/1713 cut-off events. For 4450/4450 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6045 event pairs, 65 based on Foata normal form. 34/1747 useless extension candidates. Maximal degree in co-relation 5277. Up to 672 conditions per place. [2023-08-30 18:30:35,248 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 98 selfloop transitions, 9 changer transitions 4/111 dead transitions. [2023-08-30 18:30:35,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 875 flow [2023-08-30 18:30:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:30:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:30:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2023-08-30 18:30:35,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101851851851852 [2023-08-30 18:30:35,251 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2023-08-30 18:30:35,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2023-08-30 18:30:35,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:35,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2023-08-30 18:30:35,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:35,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:35,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:35,254 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 315 flow. Second operand 5 states and 551 transitions. [2023-08-30 18:30:35,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 875 flow [2023-08-30 18:30:35,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 111 transitions, 866 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 18:30:35,262 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 319 flow [2023-08-30 18:30:35,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-08-30 18:30:35,263 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 25 predicate places. [2023-08-30 18:30:35,263 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 319 flow [2023-08-30 18:30:35,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:35,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:35,264 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, 1] [2023-08-30 18:30:35,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 18:30:35,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:35,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:35,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1446487525, now seen corresponding path program 2 times [2023-08-30 18:30:35,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:35,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613751495] [2023-08-30 18:30:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:35,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:35,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:35,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613751495] [2023-08-30 18:30:35,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613751495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:35,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667740788] [2023-08-30 18:30:35,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:30:35,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:35,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:35,378 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) [2023-08-30 18:30:35,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 18:30:35,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:30:35,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:35,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:30:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:35,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:35,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667740788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:35,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:35,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:30:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368974184] [2023-08-30 18:30:35,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:35,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:30:35,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:35,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:30:35,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:30:35,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 216 [2023-08-30 18:30:35,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 319 flow. Second operand has 7 states, 7 states have (on average 98.0) internal successors, (686), 7 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:35,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:35,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 216 [2023-08-30 18:30:35,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:36,025 INFO L130 PetriNetUnfolder]: 1441/1985 cut-off events. [2023-08-30 18:30:36,025 INFO L131 PetriNetUnfolder]: For 5224/5224 co-relation queries the response was YES. [2023-08-30 18:30:36,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9185 conditions, 1985 events. 1441/1985 cut-off events. For 5224/5224 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7183 event pairs, 129 based on Foata normal form. 68/2053 useless extension candidates. Maximal degree in co-relation 5914. Up to 1119 conditions per place. [2023-08-30 18:30:36,038 INFO L137 encePairwiseOnDemand]: 209/216 looper letters, 114 selfloop transitions, 10 changer transitions 3/127 dead transitions. [2023-08-30 18:30:36,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 127 transitions, 994 flow [2023-08-30 18:30:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:30:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:30:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2023-08-30 18:30:36,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2023-08-30 18:30:36,040 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2023-08-30 18:30:36,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2023-08-30 18:30:36,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:36,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2023-08-30 18:30:36,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:36,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 216.0) internal successors, (1512), 7 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:36,044 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 216.0) internal successors, (1512), 7 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:36,044 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 319 flow. Second operand 6 states and 630 transitions. [2023-08-30 18:30:36,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 127 transitions, 994 flow [2023-08-30 18:30:36,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 127 transitions, 985 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:30:36,050 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 370 flow [2023-08-30 18:30:36,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-08-30 18:30:36,052 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 31 predicate places. [2023-08-30 18:30:36,053 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 370 flow [2023-08-30 18:30:36,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.0) internal successors, (686), 7 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:36,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:36,054 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, 1] [2023-08-30 18:30:36,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:36,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:36,259 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:36,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2141398155, now seen corresponding path program 2 times [2023-08-30 18:30:36,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:36,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845454127] [2023-08-30 18:30:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:36,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:36,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:36,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845454127] [2023-08-30 18:30:36,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845454127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:30:36,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:30:36,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:30:36,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499860711] [2023-08-30 18:30:36,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:30:36,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:30:36,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:30:36,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:30:36,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 216 [2023-08-30 18:30:36,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:36,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:36,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 216 [2023-08-30 18:30:36,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:36,603 INFO L130 PetriNetUnfolder]: 1657/2269 cut-off events. [2023-08-30 18:30:36,603 INFO L131 PetriNetUnfolder]: For 8538/8538 co-relation queries the response was YES. [2023-08-30 18:30:36,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11206 conditions, 2269 events. 1657/2269 cut-off events. For 8538/8538 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8107 event pairs, 481 based on Foata normal form. 68/2337 useless extension candidates. Maximal degree in co-relation 9738. Up to 1331 conditions per place. [2023-08-30 18:30:36,615 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 117 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2023-08-30 18:30:36,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 125 transitions, 1158 flow [2023-08-30 18:30:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:30:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:30:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 552 transitions. [2023-08-30 18:30:36,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-08-30 18:30:36,617 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 552 transitions. [2023-08-30 18:30:36,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 552 transitions. [2023-08-30 18:30:36,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:36,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 552 transitions. [2023-08-30 18:30:36,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:36,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:36,621 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:36,621 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 370 flow. Second operand 5 states and 552 transitions. [2023-08-30 18:30:36,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 125 transitions, 1158 flow [2023-08-30 18:30:36,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 125 transitions, 1105 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-08-30 18:30:36,630 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 404 flow [2023-08-30 18:30:36,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=404, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2023-08-30 18:30:36,631 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2023-08-30 18:30:36,631 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 404 flow [2023-08-30 18:30:36,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:36,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:36,631 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, 1, 1] [2023-08-30 18:30:36,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 18:30:36,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:30:36,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash -567521946, now seen corresponding path program 1 times [2023-08-30 18:30:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:36,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775260349] [2023-08-30 18:30:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:36,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:37,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:37,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775260349] [2023-08-30 18:30:37,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775260349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:37,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841027111] [2023-08-30 18:30:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:37,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:37,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:37,137 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) [2023-08-30 18:30:37,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 18:30:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:37,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 18:30:37,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:46,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:47,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841027111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:47,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:47,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-30 18:30:47,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077494598] [2023-08-30 18:30:47,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:47,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 18:30:47,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:47,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 18:30:47,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:30:49,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:30:52,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:30:54,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:30:57,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:30:59,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:02,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 216 [2023-08-30 18:31:02,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 404 flow. Second operand has 14 states, 14 states have (on average 89.42857142857143) internal successors, (1252), 14 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:31:02,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:31:02,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 216 [2023-08-30 18:31:02,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:31:08,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:12,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:22,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:24,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:26,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:29,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:33,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:36,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:40,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:43,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:46,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:48,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:51,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:56,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 18:31:59,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 18:32:01,437 INFO L130 PetriNetUnfolder]: 2979/4106 cut-off events. [2023-08-30 18:32:01,437 INFO L131 PetriNetUnfolder]: For 14804/14804 co-relation queries the response was YES. [2023-08-30 18:32:01,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21391 conditions, 4106 events. 2979/4106 cut-off events. For 14804/14804 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16868 event pairs, 347 based on Foata normal form. 3/4109 useless extension candidates. Maximal degree in co-relation 19139. Up to 2337 conditions per place. [2023-08-30 18:32:01,458 INFO L137 encePairwiseOnDemand]: 208/216 looper letters, 215 selfloop transitions, 97 changer transitions 10/322 dead transitions. [2023-08-30 18:32:01,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 322 transitions, 2805 flow [2023-08-30 18:32:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:32:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:32:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1587 transitions. [2023-08-30 18:32:01,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592013888888889 [2023-08-30 18:32:01,462 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1587 transitions. [2023-08-30 18:32:01,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1587 transitions. [2023-08-30 18:32:01,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:32:01,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1587 transitions. [2023-08-30 18:32:01,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 99.1875) internal successors, (1587), 16 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:01,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 216.0) internal successors, (3672), 17 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:01,470 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 216.0) internal successors, (3672), 17 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:01,470 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 404 flow. Second operand 16 states and 1587 transitions. [2023-08-30 18:32:01,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 322 transitions, 2805 flow [2023-08-30 18:32:01,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 322 transitions, 2643 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-08-30 18:32:01,493 INFO L231 Difference]: Finished difference. Result has 90 places, 149 transitions, 1529 flow [2023-08-30 18:32:01,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1529, PETRI_PLACES=90, PETRI_TRANSITIONS=149} [2023-08-30 18:32:01,494 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 56 predicate places. [2023-08-30 18:32:01,494 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 149 transitions, 1529 flow [2023-08-30 18:32:01,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 89.42857142857143) internal successors, (1252), 14 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:01,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:32:01,495 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, 1, 1] [2023-08-30 18:32:01,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 18:32:01,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:32:01,703 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 18:32:01,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:32:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1310504207, now seen corresponding path program 1 times [2023-08-30 18:32:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:32:01,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86178377] [2023-08-30 18:32:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:32:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:32:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:32:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:32:02,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:32:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86178377] [2023-08-30 18:32:02,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86178377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:32:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955234203] [2023-08-30 18:32:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:32:02,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:32:02,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:32:02,137 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) [2023-08-30 18:32:02,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 18:32:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:32:02,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 18:32:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:32:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:32:30,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:35:47,716 WARN L222 SmtUtils]: Spent 3.22m on a formula simplification. DAG size of input: 3055 DAG size of output: 3017 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15