./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/popl20-more-max-array-hom.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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:50:31,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:50:31,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:50:31,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:50:31,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:50:31,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:50:31,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:50:31,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:50:31,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:50:31,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:50:31,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:50:31,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:50:31,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:50:31,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:50:31,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:50:31,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:50:31,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:50:31,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:50:31,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:50:31,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:50:31,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:50:31,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:50:31,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:50:31,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:50:31,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:50:31,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:50:31,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:50:31,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:50:31,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:50:31,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:50:31,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:50:31,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:50:31,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:50:31,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:50:31,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:50:31,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:50:31,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:50:31,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:50:31,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:50:31,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:50:31,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:50:31,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:50:31,393 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:50:31,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:50:31,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:50:31,394 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:50:31,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:50:31,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:50:31,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:50:31,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:50:31,396 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:50:31,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:50:31,397 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:50:31,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:50:31,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:50:31,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:50:31,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:50:31,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:50:31,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:50:31,398 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:50:31,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:50:31,399 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:50:31,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:50:31,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:50:31,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:50:31,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:50:31,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:50:31,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:50:31,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:50:31,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:50:31,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:50:31,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:50:31,401 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:50:31,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:50:31,401 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:50:31,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:50:31,402 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:50:31,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:50:31,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:50:31,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:50:31,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:50:31,718 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:50:31,718 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:50:31,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-09-01 13:50:32,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:50:33,091 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:50:33,092 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-09-01 13:50:33,099 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31ea4e614/715322595c6b4b249216bd4584c84820/FLAG22c727e2c [2023-09-01 13:50:33,117 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31ea4e614/715322595c6b4b249216bd4584c84820 [2023-09-01 13:50:33,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:50:33,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:50:33,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:50:33,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:50:33,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:50:33,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ad6b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33, skipping insertion in model container [2023-09-01 13:50:33,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:50:33,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:50:33,336 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/popl20-more-max-array-hom.wvr.c[2586,2599] [2023-09-01 13:50:33,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:50:33,359 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:50:33,396 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/popl20-more-max-array-hom.wvr.c[2586,2599] [2023-09-01 13:50:33,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:50:33,409 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:50:33,409 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:50:33,415 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:50:33,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33 WrapperNode [2023-09-01 13:50:33,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:50:33,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:50:33,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:50:33,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:50:33,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,468 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-09-01 13:50:33,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:50:33,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:50:33,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:50:33,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:50:33,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:50:33,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:50:33,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:50:33,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:50:33,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (1/1) ... [2023-09-01 13:50:33,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:50:33,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:33,558 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) [2023-09-01 13:50:33,578 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 [2023-09-01 13:50:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:50:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:50:33,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:50:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:50:33,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:50:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:50:33,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:50:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:50:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:50:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:50:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:50:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:50:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:50:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:50:33,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:50:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:50:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:50:33,593 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:50:33,708 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:50:33,710 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:50:33,931 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:50:34,045 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:50:34,045 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 13:50:34,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:50:34 BoogieIcfgContainer [2023-09-01 13:50:34,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:50:34,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:50:34,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:50:34,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:50:34,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:50:33" (1/3) ... [2023-09-01 13:50:34,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee4813e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:50:34, skipping insertion in model container [2023-09-01 13:50:34,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:50:33" (2/3) ... [2023-09-01 13:50:34,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee4813e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:50:34, skipping insertion in model container [2023-09-01 13:50:34,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:50:34" (3/3) ... [2023-09-01 13:50:34,054 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2023-09-01 13:50:34,060 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:50:34,069 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:50:34,069 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:50:34,069 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:50:34,181 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 13:50:34,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 145 transitions, 314 flow [2023-09-01 13:50:34,320 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2023-09-01 13:50:34,320 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:50:34,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 12/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-09-01 13:50:34,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 145 transitions, 314 flow [2023-09-01 13:50:34,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 132 transitions, 282 flow [2023-09-01 13:50:34,338 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:50:34,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 132 transitions, 282 flow [2023-09-01 13:50:34,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 132 transitions, 282 flow [2023-09-01 13:50:34,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 132 transitions, 282 flow [2023-09-01 13:50:34,404 INFO L130 PetriNetUnfolder]: 12/132 cut-off events. [2023-09-01 13:50:34,407 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:50:34,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 132 events. 12/132 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-09-01 13:50:34,412 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-09-01 13:50:39,062 INFO L134 LiptonReduction]: Checked pairs total: 1523 [2023-09-01 13:50:39,062 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-09-01 13:50:39,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:50:39,079 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;@70fecc5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:50:39,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 13:50:39,085 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-09-01 13:50:39,085 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:50:39,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:39,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:50:39,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:50:39,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash -924859563, now seen corresponding path program 1 times [2023-09-01 13:50:39,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:39,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865443947] [2023-09-01 13:50:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:39,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:39,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:39,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865443947] [2023-09-01 13:50:39,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865443947] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:50:39,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:50:39,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:50:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929774497] [2023-09-01 13:50:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:50:39,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:50:39,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:50:39,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:50:39,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 267 [2023-09-01 13:50:39,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:39,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:39,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 267 [2023-09-01 13:50:39,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:39,953 INFO L130 PetriNetUnfolder]: 269/376 cut-off events. [2023-09-01 13:50:39,953 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 13:50:39,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 376 events. 269/376 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1112 event pairs, 117 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 593. Up to 367 conditions per place. [2023-09-01 13:50:39,958 INFO L137 encePairwiseOnDemand]: 264/267 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-09-01 13:50:39,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 112 flow [2023-09-01 13:50:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:50:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:50:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-09-01 13:50:39,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48564294631710364 [2023-09-01 13:50:39,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-09-01 13:50:39,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-09-01 13:50:40,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:40,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-09-01 13:50:40,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:40,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:40,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:40,016 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 389 transitions. [2023-09-01 13:50:40,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 112 flow [2023-09-01 13:50:40,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 13:50:40,022 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-09-01 13:50:40,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-09-01 13:50:40,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-09-01 13:50:40,029 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-09-01 13:50:40,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:40,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:40,030 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] [2023-09-01 13:50:40,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:50:40,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:50:40,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:40,031 INFO L85 PathProgramCache]: Analyzing trace with hash 313336442, now seen corresponding path program 1 times [2023-09-01 13:50:40,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:40,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978402913] [2023-09-01 13:50:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:40,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:40,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:40,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978402913] [2023-09-01 13:50:40,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978402913] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:40,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42273090] [2023-09-01 13:50:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:40,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:40,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:40,189 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) [2023-09-01 13:50:40,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:50:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:40,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:50:40,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:40,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:40,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42273090] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:40,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:50:40,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-09-01 13:50:40,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292307462] [2023-09-01 13:50:40,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:50:40,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:50:40,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:40,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:50:40,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:50:40,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 267 [2023-09-01 13:50:40,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:40,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:40,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 267 [2023-09-01 13:50:40,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:40,649 INFO L130 PetriNetUnfolder]: 309/442 cut-off events. [2023-09-01 13:50:40,649 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 13:50:40,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 442 events. 309/442 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1394 event pairs, 49 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 889. Up to 335 conditions per place. [2023-09-01 13:50:40,654 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2023-09-01 13:50:40,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2023-09-01 13:50:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:50:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:50:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 609 transitions. [2023-09-01 13:50:40,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45617977528089887 [2023-09-01 13:50:40,656 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 609 transitions. [2023-09-01 13:50:40,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 609 transitions. [2023-09-01 13:50:40,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:40,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 609 transitions. [2023-09-01 13:50:40,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:40,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:40,663 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:40,663 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 609 transitions. [2023-09-01 13:50:40,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2023-09-01 13:50:40,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:50:40,665 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 78 flow [2023-09-01 13:50:40,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-09-01 13:50:40,666 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-09-01 13:50:40,666 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 78 flow [2023-09-01 13:50:40,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:40,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:40,667 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] [2023-09-01 13:50:40,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:50:40,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:40,873 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:50:40,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:40,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1604052521, now seen corresponding path program 1 times [2023-09-01 13:50:40,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:40,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154115283] [2023-09-01 13:50:40,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:40,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:50:41,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:41,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154115283] [2023-09-01 13:50:41,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154115283] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:41,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930028722] [2023-09-01 13:50:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:41,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:41,073 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) [2023-09-01 13:50:41,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:50:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:50:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:50:41,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:50:41,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930028722] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:41,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:50:41,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-09-01 13:50:41,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974932838] [2023-09-01 13:50:41,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:50:41,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:50:41,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:50:41,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:50:41,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-09-01 13:50:41,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:41,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:41,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-09-01 13:50:41,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:41,587 INFO L130 PetriNetUnfolder]: 409/609 cut-off events. [2023-09-01 13:50:41,587 INFO L131 PetriNetUnfolder]: For 108/152 co-relation queries the response was YES. [2023-09-01 13:50:41,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 609 events. 409/609 cut-off events. For 108/152 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1976 event pairs, 138 based on Foata normal form. 44/483 useless extension candidates. Maximal degree in co-relation 1407. Up to 345 conditions per place. [2023-09-01 13:50:41,590 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 52 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2023-09-01 13:50:41,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 300 flow [2023-09-01 13:50:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:50:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:50:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 821 transitions. [2023-09-01 13:50:41,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43927233814874267 [2023-09-01 13:50:41,594 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 821 transitions. [2023-09-01 13:50:41,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 821 transitions. [2023-09-01 13:50:41,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:41,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 821 transitions. [2023-09-01 13:50:41,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 117.28571428571429) internal successors, (821), 7 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:41,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:41,601 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:41,601 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 78 flow. Second operand 7 states and 821 transitions. [2023-09-01 13:50:41,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 300 flow [2023-09-01 13:50:41,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 283 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 13:50:41,603 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 120 flow [2023-09-01 13:50:41,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-09-01 13:50:41,604 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-09-01 13:50:41,604 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 120 flow [2023-09-01 13:50:41,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:41,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:41,605 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] [2023-09-01 13:50:41,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:50:41,811 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,SelfDestructingSolverStorable2 [2023-09-01 13:50:41,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:50:41,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1189152529, now seen corresponding path program 2 times [2023-09-01 13:50:41,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:41,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906355736] [2023-09-01 13:50:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:41,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906355736] [2023-09-01 13:50:41,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906355736] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441589642] [2023-09-01 13:50:41,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:50:41,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:41,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:41,945 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) [2023-09-01 13:50:41,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:50:42,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 13:50:42,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:50:42,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 13:50:42,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:50:42,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:50:42,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441589642] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:50:42,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:50:42,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-09-01 13:50:42,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266753088] [2023-09-01 13:50:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:50:42,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:50:42,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:50:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:50:42,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 267 [2023-09-01 13:50:42,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:42,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:42,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 267 [2023-09-01 13:50:42,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:42,290 INFO L130 PetriNetUnfolder]: 312/464 cut-off events. [2023-09-01 13:50:42,290 INFO L131 PetriNetUnfolder]: For 218/247 co-relation queries the response was YES. [2023-09-01 13:50:42,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 464 events. 312/464 cut-off events. For 218/247 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1477 event pairs, 119 based on Foata normal form. 55/416 useless extension candidates. Maximal degree in co-relation 1317. Up to 330 conditions per place. [2023-09-01 13:50:42,294 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 34 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-09-01 13:50:42,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 228 flow [2023-09-01 13:50:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:50:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:50:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-09-01 13:50:42,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47659176029962547 [2023-09-01 13:50:42,296 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-09-01 13:50:42,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-09-01 13:50:42,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:42,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-09-01 13:50:42,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:42,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:42,301 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:42,301 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 120 flow. Second operand 4 states and 509 transitions. [2023-09-01 13:50:42,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 228 flow [2023-09-01 13:50:42,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 217 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 13:50:42,305 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 125 flow [2023-09-01 13:50:42,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-09-01 13:50:42,306 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-09-01 13:50:42,306 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 125 flow [2023-09-01 13:50:42,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:42,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:42,307 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] [2023-09-01 13:50:42,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:50:42,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:42,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:50:42,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1697474197, now seen corresponding path program 1 times [2023-09-01 13:50:42,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:42,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066170484] [2023-09-01 13:50:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:43,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066170484] [2023-09-01 13:50:43,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066170484] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:43,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437580780] [2023-09-01 13:50:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:43,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:43,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:43,779 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) [2023-09-01 13:50:43,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:50:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:43,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 13:50:43,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:43,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 13:50:44,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:50:44,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:44,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-09-01 13:50:44,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:44,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-09-01 13:50:44,576 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:50:44,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:44,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-09-01 13:50:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:44,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:45,113 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_~max1~0 c_~max2~0)) (.cse0 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (forall ((v_ArrVal_201 (Array Int Int))) (< c_~max3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse0))) (and (or .cse1 (< c_~max2~0 c_~max3~0)) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0)))) (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse0))) (or (= c_~max1~0 .cse2) (<= .cse2 c_~max3~0) (<= .cse2 c_~max2~0)))) (or .cse1 (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse0))) (or (<= .cse3 c_~max3~0) (< c_~max2~0 .cse3))))))) is different from false [2023-09-01 13:50:45,204 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_~max1~0 c_~max2~0)) (.cse2 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or .cse0 (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse2))) (or (< c_~max2~0 .cse1) (<= .cse1 c_~max3~0))))) (or (and (or .cse0 (< c_~max2~0 c_~max3~0)) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0))) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (< c_~max3~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse2)))) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse3 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse2))) (or (= c_~max1~0 .cse3) (<= .cse3 c_~max2~0) (<= .cse3 c_~max3~0)))))) is different from false [2023-09-01 13:51:08,671 WARN L222 SmtUtils]: Spent 22.26s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:51:08,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:08,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2023-09-01 13:51:08,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:08,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 319 treesize of output 307 [2023-09-01 13:51:08,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 112 [2023-09-01 13:51:08,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:08,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 63 [2023-09-01 13:51:08,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-09-01 13:51:09,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:09,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 73 [2023-09-01 13:51:09,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:09,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 313 [2023-09-01 13:51:09,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 223 [2023-09-01 13:51:09,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 199 [2023-09-01 13:51:09,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:09,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 115 [2023-09-01 13:51:10,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:10,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2023-09-01 13:51:10,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:10,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 324 [2023-09-01 13:51:10,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 112 [2023-09-01 13:51:10,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:10,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 70 [2023-09-01 13:51:10,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-09-01 13:51:10,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:10,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2023-09-01 13:51:10,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:10,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1264 treesize of output 1200 [2023-09-01 13:51:10,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:10,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 82 [2023-09-01 13:51:10,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2023-09-01 13:51:10,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2023-09-01 13:51:10,631 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 13:51:10,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 1 [2023-09-01 13:51:10,642 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 13:51:10,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 1 [2023-09-01 13:51:10,653 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 13:51:10,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 1 [2023-09-01 13:51:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:10,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437580780] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:10,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:10,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-09-01 13:51:10,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407859472] [2023-09-01 13:51:10,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:10,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:51:10,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:51:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=633, Unknown=4, NotChecked=106, Total=870 [2023-09-01 13:51:10,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 267 [2023-09-01 13:51:10,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 125 flow. Second operand has 30 states, 30 states have (on average 74.2) internal successors, (2226), 30 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:10,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:10,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 267 [2023-09-01 13:51:10,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:12,626 INFO L130 PetriNetUnfolder]: 804/1177 cut-off events. [2023-09-01 13:51:12,626 INFO L131 PetriNetUnfolder]: For 1181/1194 co-relation queries the response was YES. [2023-09-01 13:51:12,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3718 conditions, 1177 events. 804/1177 cut-off events. For 1181/1194 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4687 event pairs, 60 based on Foata normal form. 14/950 useless extension candidates. Maximal degree in co-relation 2861. Up to 722 conditions per place. [2023-09-01 13:51:12,637 INFO L137 encePairwiseOnDemand]: 253/267 looper letters, 84 selfloop transitions, 51 changer transitions 1/138 dead transitions. [2023-09-01 13:51:12,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 138 transitions, 825 flow [2023-09-01 13:51:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:51:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:51:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 899 transitions. [2023-09-01 13:51:12,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30609465440926115 [2023-09-01 13:51:12,643 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 899 transitions. [2023-09-01 13:51:12,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 899 transitions. [2023-09-01 13:51:12,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:12,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 899 transitions. [2023-09-01 13:51:12,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 81.72727272727273) internal successors, (899), 11 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:12,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:12,649 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:12,649 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 125 flow. Second operand 11 states and 899 transitions. [2023-09-01 13:51:12,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 138 transitions, 825 flow [2023-09-01 13:51:12,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 138 transitions, 749 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-09-01 13:51:12,659 INFO L231 Difference]: Finished difference. Result has 50 places, 81 transitions, 482 flow [2023-09-01 13:51:12,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=482, PETRI_PLACES=50, PETRI_TRANSITIONS=81} [2023-09-01 13:51:12,661 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-09-01 13:51:12,661 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 81 transitions, 482 flow [2023-09-01 13:51:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 74.2) internal successors, (2226), 30 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:12,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:12,662 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] [2023-09-01 13:51:12,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:12,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:12,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:12,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1093688525, now seen corresponding path program 2 times [2023-09-01 13:51:12,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:12,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568593686] [2023-09-01 13:51:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:12,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:13,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:13,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568593686] [2023-09-01 13:51:13,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568593686] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:13,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130388571] [2023-09-01 13:51:13,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:51:13,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:13,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:13,664 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) [2023-09-01 13:51:13,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:51:13,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:51:13,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:13,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:51:13,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:14,210 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:51:14,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:14,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-09-01 13:51:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:14,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:14,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:14,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 69 [2023-09-01 13:51:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:14,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130388571] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:14,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:14,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-09-01 13:51:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127110069] [2023-09-01 13:51:14,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 13:51:14,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 13:51:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-09-01 13:51:15,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 267 [2023-09-01 13:51:15,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 81 transitions, 482 flow. Second operand has 27 states, 27 states have (on average 97.55555555555556) internal successors, (2634), 27 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:15,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:15,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 267 [2023-09-01 13:51:15,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:16,623 INFO L130 PetriNetUnfolder]: 1054/1547 cut-off events. [2023-09-01 13:51:16,623 INFO L131 PetriNetUnfolder]: For 2446/2446 co-relation queries the response was YES. [2023-09-01 13:51:16,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6082 conditions, 1547 events. 1054/1547 cut-off events. For 2446/2446 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5886 event pairs, 142 based on Foata normal form. 1/1547 useless extension candidates. Maximal degree in co-relation 5301. Up to 1191 conditions per place. [2023-09-01 13:51:16,633 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 99 selfloop transitions, 58 changer transitions 1/158 dead transitions. [2023-09-01 13:51:16,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 158 transitions, 1202 flow [2023-09-01 13:51:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:51:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:51:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1226 transitions. [2023-09-01 13:51:16,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38264669163545567 [2023-09-01 13:51:16,638 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1226 transitions. [2023-09-01 13:51:16,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1226 transitions. [2023-09-01 13:51:16,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:16,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1226 transitions. [2023-09-01 13:51:16,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 102.16666666666667) internal successors, (1226), 12 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:16,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:16,645 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:16,645 INFO L175 Difference]: Start difference. First operand has 50 places, 81 transitions, 482 flow. Second operand 12 states and 1226 transitions. [2023-09-01 13:51:16,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 158 transitions, 1202 flow [2023-09-01 13:51:16,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 158 transitions, 1180 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-09-01 13:51:16,653 INFO L231 Difference]: Finished difference. Result has 67 places, 118 transitions, 900 flow [2023-09-01 13:51:16,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=900, PETRI_PLACES=67, PETRI_TRANSITIONS=118} [2023-09-01 13:51:16,653 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2023-09-01 13:51:16,654 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 118 transitions, 900 flow [2023-09-01 13:51:16,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 97.55555555555556) internal successors, (2634), 27 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:16,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:16,655 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] [2023-09-01 13:51:16,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:16,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:16,861 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:16,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:16,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1787047017, now seen corresponding path program 3 times [2023-09-01 13:51:16,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:16,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313834054] [2023-09-01 13:51:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:16,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:17,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:17,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313834054] [2023-09-01 13:51:17,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313834054] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:17,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421350072] [2023-09-01 13:51:17,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:51:17,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:17,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:17,530 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:17,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:51:17,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:51:17,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:17,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 13:51:17,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:17,915 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:51:17,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:17,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-09-01 13:51:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:17,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:18,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:18,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 69 [2023-09-01 13:51:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:18,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421350072] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:18,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:18,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2023-09-01 13:51:18,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287111879] [2023-09-01 13:51:18,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:18,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:51:18,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:18,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:51:18,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:51:19,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 267 [2023-09-01 13:51:19,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 118 transitions, 900 flow. Second operand has 24 states, 24 states have (on average 102.5) internal successors, (2460), 24 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:19,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:19,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 267 [2023-09-01 13:51:19,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:20,339 INFO L130 PetriNetUnfolder]: 1157/1702 cut-off events. [2023-09-01 13:51:20,339 INFO L131 PetriNetUnfolder]: For 4740/4851 co-relation queries the response was YES. [2023-09-01 13:51:20,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7800 conditions, 1702 events. 1157/1702 cut-off events. For 4740/4851 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7076 event pairs, 161 based on Foata normal form. 25/1698 useless extension candidates. Maximal degree in co-relation 7265. Up to 1316 conditions per place. [2023-09-01 13:51:20,353 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 120 selfloop transitions, 71 changer transitions 1/196 dead transitions. [2023-09-01 13:51:20,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 196 transitions, 1779 flow [2023-09-01 13:51:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:51:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:51:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1087 transitions. [2023-09-01 13:51:20,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40711610486891386 [2023-09-01 13:51:20,357 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1087 transitions. [2023-09-01 13:51:20,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1087 transitions. [2023-09-01 13:51:20,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:20,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1087 transitions. [2023-09-01 13:51:20,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:20,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:20,363 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:20,363 INFO L175 Difference]: Start difference. First operand has 67 places, 118 transitions, 900 flow. Second operand 10 states and 1087 transitions. [2023-09-01 13:51:20,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 196 transitions, 1779 flow [2023-09-01 13:51:20,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 196 transitions, 1751 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-09-01 13:51:20,378 INFO L231 Difference]: Finished difference. Result has 78 places, 145 transitions, 1318 flow [2023-09-01 13:51:20,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1318, PETRI_PLACES=78, PETRI_TRANSITIONS=145} [2023-09-01 13:51:20,379 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2023-09-01 13:51:20,379 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 145 transitions, 1318 flow [2023-09-01 13:51:20,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 102.5) internal successors, (2460), 24 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:20,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:20,381 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] [2023-09-01 13:51:20,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 13:51:20,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:20,589 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:20,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash 374391591, now seen corresponding path program 4 times [2023-09-01 13:51:20,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:20,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002344682] [2023-09-01 13:51:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:20,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:21,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002344682] [2023-09-01 13:51:21,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002344682] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660621079] [2023-09-01 13:51:21,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:51:21,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:21,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:21,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:21,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:51:21,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:51:21,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:21,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 13:51:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:21,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:21,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2023-09-01 13:51:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:21,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:22,034 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:51:22,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 65 [2023-09-01 13:51:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:22,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660621079] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:22,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:22,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-09-01 13:51:22,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349851219] [2023-09-01 13:51:22,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:22,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:51:22,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:51:22,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:51:22,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 267 [2023-09-01 13:51:22,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 145 transitions, 1318 flow. Second operand has 22 states, 22 states have (on average 104.72727272727273) internal successors, (2304), 22 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:22,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:22,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 267 [2023-09-01 13:51:22,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:23,703 INFO L130 PetriNetUnfolder]: 1934/2871 cut-off events. [2023-09-01 13:51:23,704 INFO L131 PetriNetUnfolder]: For 10604/10867 co-relation queries the response was YES. [2023-09-01 13:51:23,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13617 conditions, 2871 events. 1934/2871 cut-off events. For 10604/10867 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13626 event pairs, 152 based on Foata normal form. 82/2907 useless extension candidates. Maximal degree in co-relation 12487. Up to 1313 conditions per place. [2023-09-01 13:51:23,728 INFO L137 encePairwiseOnDemand]: 253/267 looper letters, 154 selfloop transitions, 180 changer transitions 7/345 dead transitions. [2023-09-01 13:51:23,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 345 transitions, 3275 flow [2023-09-01 13:51:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:51:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:51:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1906 transitions. [2023-09-01 13:51:23,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41991628111918927 [2023-09-01 13:51:23,734 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1906 transitions. [2023-09-01 13:51:23,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1906 transitions. [2023-09-01 13:51:23,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:23,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1906 transitions. [2023-09-01 13:51:23,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 112.11764705882354) internal successors, (1906), 17 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:23,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:23,745 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:23,745 INFO L175 Difference]: Start difference. First operand has 78 places, 145 transitions, 1318 flow. Second operand 17 states and 1906 transitions. [2023-09-01 13:51:23,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 345 transitions, 3275 flow [2023-09-01 13:51:23,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 345 transitions, 3144 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-09-01 13:51:23,778 INFO L231 Difference]: Finished difference. Result has 97 places, 242 transitions, 2560 flow [2023-09-01 13:51:23,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2560, PETRI_PLACES=97, PETRI_TRANSITIONS=242} [2023-09-01 13:51:23,779 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2023-09-01 13:51:23,779 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 242 transitions, 2560 flow [2023-09-01 13:51:23,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 104.72727272727273) internal successors, (2304), 22 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:23,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:23,780 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] [2023-09-01 13:51:23,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:23,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:23,992 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:23,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1063576487, now seen corresponding path program 5 times [2023-09-01 13:51:23,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:23,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675085917] [2023-09-01 13:51:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:23,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:24,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:24,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675085917] [2023-09-01 13:51:24,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675085917] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:24,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999487277] [2023-09-01 13:51:24,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:51:24,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:24,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:24,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:24,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:51:24,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:51:24,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 13:51:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:25,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 37 [2023-09-01 13:51:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:25,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:25,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:25,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 69 [2023-09-01 13:51:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:26,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999487277] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:26,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:26,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 25 [2023-09-01 13:51:26,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053525473] [2023-09-01 13:51:26,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:26,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 13:51:26,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:26,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 13:51:26,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2023-09-01 13:51:27,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 267 [2023-09-01 13:51:27,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 242 transitions, 2560 flow. Second operand has 27 states, 27 states have (on average 91.55555555555556) internal successors, (2472), 27 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:27,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:27,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 267 [2023-09-01 13:51:27,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:30,276 INFO L130 PetriNetUnfolder]: 2688/4018 cut-off events. [2023-09-01 13:51:30,276 INFO L131 PetriNetUnfolder]: For 22948/22948 co-relation queries the response was YES. [2023-09-01 13:51:30,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22156 conditions, 4018 events. 2688/4018 cut-off events. For 22948/22948 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19339 event pairs, 339 based on Foata normal form. 27/4045 useless extension candidates. Maximal degree in co-relation 21951. Up to 2697 conditions per place. [2023-09-01 13:51:30,308 INFO L137 encePairwiseOnDemand]: 254/267 looper letters, 282 selfloop transitions, 196 changer transitions 12/490 dead transitions. [2023-09-01 13:51:30,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 490 transitions, 5541 flow [2023-09-01 13:51:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 13:51:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 13:51:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3571 transitions. [2023-09-01 13:51:30,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36147383338394573 [2023-09-01 13:51:30,318 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3571 transitions. [2023-09-01 13:51:30,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3571 transitions. [2023-09-01 13:51:30,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:30,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3571 transitions. [2023-09-01 13:51:30,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 96.51351351351352) internal successors, (3571), 37 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:30,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:30,339 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:30,340 INFO L175 Difference]: Start difference. First operand has 97 places, 242 transitions, 2560 flow. Second operand 37 states and 3571 transitions. [2023-09-01 13:51:30,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 490 transitions, 5541 flow [2023-09-01 13:51:30,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 490 transitions, 5195 flow, removed 132 selfloop flow, removed 5 redundant places. [2023-09-01 13:51:30,419 INFO L231 Difference]: Finished difference. Result has 147 places, 339 transitions, 3919 flow [2023-09-01 13:51:30,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3919, PETRI_PLACES=147, PETRI_TRANSITIONS=339} [2023-09-01 13:51:30,421 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2023-09-01 13:51:30,421 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 339 transitions, 3919 flow [2023-09-01 13:51:30,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 91.55555555555556) internal successors, (2472), 27 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:30,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:30,422 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] [2023-09-01 13:51:30,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:30,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-09-01 13:51:30,633 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:30,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:30,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1819272483, now seen corresponding path program 6 times [2023-09-01 13:51:30,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:30,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055255297] [2023-09-01 13:51:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:30,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:31,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:31,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055255297] [2023-09-01 13:51:31,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055255297] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:31,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117581099] [2023-09-01 13:51:31,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:51:31,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:31,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:31,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:31,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:51:31,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:51:31,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:51:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:31,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2023-09-01 13:51:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:31,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:31,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:31,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 69 [2023-09-01 13:51:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:32,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117581099] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:32,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:32,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-09-01 13:51:32,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828570421] [2023-09-01 13:51:32,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:32,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:51:32,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:32,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:51:32,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:51:33,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 267 [2023-09-01 13:51:33,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 339 transitions, 3919 flow. Second operand has 24 states, 24 states have (on average 100.875) internal successors, (2421), 24 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:33,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:33,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 267 [2023-09-01 13:51:33,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:34,506 INFO L130 PetriNetUnfolder]: 2884/4316 cut-off events. [2023-09-01 13:51:34,506 INFO L131 PetriNetUnfolder]: For 35838/35838 co-relation queries the response was YES. [2023-09-01 13:51:34,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26977 conditions, 4316 events. 2884/4316 cut-off events. For 35838/35838 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21266 event pairs, 600 based on Foata normal form. 2/4318 useless extension candidates. Maximal degree in co-relation 26710. Up to 3788 conditions per place. [2023-09-01 13:51:34,547 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 292 selfloop transitions, 142 changer transitions 1/435 dead transitions. [2023-09-01 13:51:34,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 435 transitions, 5843 flow [2023-09-01 13:51:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 13:51:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 13:51:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1883 transitions. [2023-09-01 13:51:34,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3918019142738244 [2023-09-01 13:51:34,551 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1883 transitions. [2023-09-01 13:51:34,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1883 transitions. [2023-09-01 13:51:34,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:34,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1883 transitions. [2023-09-01 13:51:34,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.61111111111111) internal successors, (1883), 18 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:34,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:34,560 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:34,560 INFO L175 Difference]: Start difference. First operand has 147 places, 339 transitions, 3919 flow. Second operand 18 states and 1883 transitions. [2023-09-01 13:51:34,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 435 transitions, 5843 flow [2023-09-01 13:51:34,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 435 transitions, 5438 flow, removed 166 selfloop flow, removed 7 redundant places. [2023-09-01 13:51:34,708 INFO L231 Difference]: Finished difference. Result has 162 places, 386 transitions, 4563 flow [2023-09-01 13:51:34,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4563, PETRI_PLACES=162, PETRI_TRANSITIONS=386} [2023-09-01 13:51:34,711 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2023-09-01 13:51:34,712 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 386 transitions, 4563 flow [2023-09-01 13:51:34,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.875) internal successors, (2421), 24 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:34,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:34,712 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] [2023-09-01 13:51:34,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:34,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 13:51:34,918 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:34,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:34,919 INFO L85 PathProgramCache]: Analyzing trace with hash 9615099, now seen corresponding path program 7 times [2023-09-01 13:51:34,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:34,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614870008] [2023-09-01 13:51:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:34,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:35,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:35,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614870008] [2023-09-01 13:51:35,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614870008] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:35,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111224081] [2023-09-01 13:51:35,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:51:35,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:35,504 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:35,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:51:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:35,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 13:51:35,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:35,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 13:51:35,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:51:35,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:51:35,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:51:36,169 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-09-01 13:51:36,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 59 [2023-09-01 13:51:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:36,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:37,323 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (< c_~max2~0 c_~max3~0)) (.cse4 (<= c_~max3~0 c_~max2~0)) (.cse10 (= c_~max1~0 c_~max2~0)) (.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse0 (select .cse2 .cse3)) (.cse1 (select .cse2 c_~A~0.offset))) (or (<= .cse0 c_~max2~0) (<= .cse0 c_~max3~0) (= .cse0 .cse1) (<= .cse1 c_~max1~0))))) (or .cse4 (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse6 (select .cse5 c_~A~0.offset))) (or (< c_~max3~0 (select .cse5 .cse3)) (= .cse6 c_~max3~0) (<= .cse6 c_~max1~0)))))) (or (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse8 (select .cse7 c_~A~0.offset))) (or (< c_~max3~0 (select .cse7 .cse3)) (<= .cse8 c_~max1~0) (= .cse8 c_~max2~0))))) .cse9) (or (and (or .cse10 .cse9) (or (= c_~max1~0 c_~max3~0) .cse4)) (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (or (< c_~max3~0 (select .cse11 .cse3)) (< c_~max1~0 (select .cse11 c_~A~0.offset)))))) (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse12 (select .cse14 .cse3)) (.cse13 (select .cse14 c_~A~0.offset))) (or (<= .cse12 c_~max3~0) (< c_~max2~0 .cse12) (<= .cse13 c_~max1~0) (= .cse13 c_~max2~0))))) (or (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse16 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse15 (select .cse16 .cse3))) (or (<= .cse15 c_~max3~0) (< c_~max1~0 (select .cse16 c_~A~0.offset)) (< c_~max2~0 .cse15))))) .cse10) (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse18 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse17 (select .cse18 .cse3))) (or (<= .cse17 c_~max2~0) (<= .cse17 c_~max3~0) (< c_~max1~0 (select .cse18 c_~A~0.offset)) (= c_~max1~0 .cse17))))))) is different from false [2023-09-01 13:51:37,512 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (= c_~max1~0 c_~max2~0)) (.cse12 (<= c_~max3~0 c_~max2~0)) (.cse15 (< c_~max2~0 c_~max3~0)) (.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse0 (select .cse2 .cse3)) (.cse1 (select .cse2 c_~A~0.offset))) (or (< c_~max2~0 .cse0) (<= .cse0 c_~max3~0) (= .cse1 c_~max2~0) (<= .cse1 c_~max1~0))))) (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse4 (select .cse6 .cse3)) (.cse5 (select .cse6 c_~A~0.offset))) (or (= .cse4 .cse5) (<= .cse4 c_~max3~0) (<= .cse4 c_~max2~0) (<= .cse5 c_~max1~0))))) (or (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse8 (select .cse7 .cse3))) (or (< c_~max1~0 (select .cse7 c_~A~0.offset)) (< c_~max2~0 .cse8) (<= .cse8 c_~max3~0))))) .cse9) (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse10 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse11 (select .cse10 .cse3))) (or (< c_~max1~0 (select .cse10 c_~A~0.offset)) (= c_~max1~0 .cse11) (<= .cse11 c_~max3~0) (<= .cse11 c_~max2~0))))) (or .cse12 (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse14 (select .cse13 c_~A~0.offset))) (or (< c_~max3~0 (select .cse13 .cse3)) (= .cse14 c_~max3~0) (<= .cse14 c_~max1~0)))))) (or (and (or .cse9 .cse15) (or (= c_~max1~0 c_~max3~0) .cse12)) (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (or (< c_~max3~0 (select .cse16 .cse3)) (< c_~max1~0 (select .cse16 c_~A~0.offset)))))) (or .cse15 (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse17 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse18 (select .cse17 c_~A~0.offset))) (or (< c_~max3~0 (select .cse17 .cse3)) (= .cse18 c_~max2~0) (<= .cse18 c_~max1~0)))))))) is different from false [2023-09-01 13:51:38,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:38,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 65 [2023-09-01 13:51:38,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:38,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 764 treesize of output 740 [2023-09-01 13:51:38,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:38,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 338 [2023-09-01 13:51:38,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:38,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 167 [2023-09-01 13:51:38,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:38,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 320 treesize of output 288 [2023-09-01 13:51:39,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:39,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 102 [2023-09-01 13:51:39,507 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 13:51:39,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1161 treesize of output 1100 [2023-09-01 13:51:39,558 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:51:39,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 527 treesize of output 483 [2023-09-01 13:51:39,579 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:51:39,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 483 treesize of output 395 [2023-09-01 13:51:39,601 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:51:39,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 185 [2023-09-01 13:51:39,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:39,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 69 [2023-09-01 13:51:39,860 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:51:39,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 828 treesize of output 792 [2023-09-01 13:51:39,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:51:39,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 170 [2023-09-01 13:51:39,910 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:51:39,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 364 treesize of output 312 [2023-09-01 13:51:39,939 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:51:39,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 143 [2023-09-01 13:51:40,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:40,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 89 [2023-09-01 13:51:40,157 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:51:40,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1125 treesize of output 1073 [2023-09-01 13:51:40,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:51:40,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 245 [2023-09-01 13:51:40,238 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:51:40,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 493 treesize of output 457 [2023-09-01 13:51:40,263 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:51:40,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 453 treesize of output 377 [2023-09-01 13:51:40,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:40,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2023-09-01 13:51:40,488 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:51:40,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1083 treesize of output 1039 [2023-09-01 13:51:40,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:51:40,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 103 [2023-09-01 13:51:40,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:51:40,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 95 [2023-09-01 13:51:40,545 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:51:40,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 97 [2023-09-01 13:51:40,667 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 13:51:40,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 1 [2023-09-01 13:51:40,678 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 13:51:40,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 1 [2023-09-01 13:51:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:40,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111224081] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:40,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:40,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-09-01 13:51:40,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532938530] [2023-09-01 13:51:40,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:40,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:51:40,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:51:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=588, Unknown=2, NotChecked=102, Total=812 [2023-09-01 13:51:41,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 267 [2023-09-01 13:51:41,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 386 transitions, 4563 flow. Second operand has 29 states, 29 states have (on average 71.17241379310344) internal successors, (2064), 29 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:41,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:41,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 267 [2023-09-01 13:51:41,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:43,693 INFO L130 PetriNetUnfolder]: 3197/4831 cut-off events. [2023-09-01 13:51:43,693 INFO L131 PetriNetUnfolder]: For 41164/41164 co-relation queries the response was YES. [2023-09-01 13:51:43,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30457 conditions, 4831 events. 3197/4831 cut-off events. For 41164/41164 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24697 event pairs, 644 based on Foata normal form. 3/4834 useless extension candidates. Maximal degree in co-relation 30177. Up to 3787 conditions per place. [2023-09-01 13:51:43,733 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 325 selfloop transitions, 206 changer transitions 9/540 dead transitions. [2023-09-01 13:51:43,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 540 transitions, 7032 flow [2023-09-01 13:51:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 13:51:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 13:51:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1904 transitions. [2023-09-01 13:51:43,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2852434456928839 [2023-09-01 13:51:43,737 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1904 transitions. [2023-09-01 13:51:43,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1904 transitions. [2023-09-01 13:51:43,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:43,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1904 transitions. [2023-09-01 13:51:43,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:43,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 267.0) internal successors, (6942), 26 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:43,748 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 267.0) internal successors, (6942), 26 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:43,748 INFO L175 Difference]: Start difference. First operand has 162 places, 386 transitions, 4563 flow. Second operand 25 states and 1904 transitions. [2023-09-01 13:51:43,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 540 transitions, 7032 flow [2023-09-01 13:51:43,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 540 transitions, 6806 flow, removed 91 selfloop flow, removed 6 redundant places. [2023-09-01 13:51:43,908 INFO L231 Difference]: Finished difference. Result has 189 places, 435 transitions, 5582 flow [2023-09-01 13:51:43,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4381, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5582, PETRI_PLACES=189, PETRI_TRANSITIONS=435} [2023-09-01 13:51:43,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2023-09-01 13:51:43,908 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 435 transitions, 5582 flow [2023-09-01 13:51:43,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 71.17241379310344) internal successors, (2064), 29 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:43,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:43,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:51:43,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:44,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 13:51:44,113 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:44,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash -791178686, now seen corresponding path program 8 times [2023-09-01 13:51:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:44,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404180881] [2023-09-01 13:51:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:44,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:44,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:44,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404180881] [2023-09-01 13:51:44,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404180881] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:44,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758109944] [2023-09-01 13:51:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:51:44,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:44,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:44,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:44,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:51:44,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:51:44,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:44,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:51:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:44,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758109944] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:44,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:44,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-09-01 13:51:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849080308] [2023-09-01 13:51:44,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:51:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:51:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:51:44,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-09-01 13:51:44,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 435 transitions, 5582 flow. Second operand has 20 states, 20 states have (on average 107.6) internal successors, (2152), 20 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:44,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:44,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-09-01 13:51:44,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:46,333 INFO L130 PetriNetUnfolder]: 3692/5552 cut-off events. [2023-09-01 13:51:46,333 INFO L131 PetriNetUnfolder]: For 61132/61132 co-relation queries the response was YES. [2023-09-01 13:51:46,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38045 conditions, 5552 events. 3692/5552 cut-off events. For 61132/61132 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28827 event pairs, 1142 based on Foata normal form. 149/5701 useless extension candidates. Maximal degree in co-relation 37976. Up to 3722 conditions per place. [2023-09-01 13:51:46,459 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 469 selfloop transitions, 150 changer transitions 0/619 dead transitions. [2023-09-01 13:51:46,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 619 transitions, 9064 flow [2023-09-01 13:51:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:51:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:51:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2165 transitions. [2023-09-01 13:51:46,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426769170116302 [2023-09-01 13:51:46,469 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2165 transitions. [2023-09-01 13:51:46,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2165 transitions. [2023-09-01 13:51:46,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:46,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2165 transitions. [2023-09-01 13:51:46,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.94736842105263) internal successors, (2165), 19 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:46,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:46,478 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:46,478 INFO L175 Difference]: Start difference. First operand has 189 places, 435 transitions, 5582 flow. Second operand 19 states and 2165 transitions. [2023-09-01 13:51:46,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 619 transitions, 9064 flow [2023-09-01 13:51:46,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 619 transitions, 8734 flow, removed 91 selfloop flow, removed 14 redundant places. [2023-09-01 13:51:46,665 INFO L231 Difference]: Finished difference. Result has 202 places, 482 transitions, 6570 flow [2023-09-01 13:51:46,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4973, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6570, PETRI_PLACES=202, PETRI_TRANSITIONS=482} [2023-09-01 13:51:46,666 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-09-01 13:51:46,666 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 482 transitions, 6570 flow [2023-09-01 13:51:46,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.6) internal successors, (2152), 20 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:46,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:46,667 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, 1] [2023-09-01 13:51:46,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:46,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:51:46,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:46,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:46,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1356484867, now seen corresponding path program 1 times [2023-09-01 13:51:46,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:46,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782686435] [2023-09-01 13:51:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:46,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:46,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:46,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782686435] [2023-09-01 13:51:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782686435] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:46,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897467794] [2023-09-01 13:51:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:46,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:46,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:46,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:46,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:51:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 13:51:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:47,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:47,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897467794] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:47,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:47,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 13:51:47,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450607824] [2023-09-01 13:51:47,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:51:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:47,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:51:47,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:51:47,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-09-01 13:51:47,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 482 transitions, 6570 flow. Second operand has 16 states, 16 states have (on average 111.5) internal successors, (1784), 16 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:47,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:47,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-09-01 13:51:47,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:48,727 INFO L130 PetriNetUnfolder]: 3918/5943 cut-off events. [2023-09-01 13:51:48,727 INFO L131 PetriNetUnfolder]: For 111415/111472 co-relation queries the response was YES. [2023-09-01 13:51:48,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47348 conditions, 5943 events. 3918/5943 cut-off events. For 111415/111472 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32147 event pairs, 602 based on Foata normal form. 37/5972 useless extension candidates. Maximal degree in co-relation 47268. Up to 2063 conditions per place. [2023-09-01 13:51:48,790 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 565 selfloop transitions, 116 changer transitions 16/719 dead transitions. [2023-09-01 13:51:48,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 719 transitions, 10963 flow [2023-09-01 13:51:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:51:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:51:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1424 transitions. [2023-09-01 13:51:48,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-09-01 13:51:48,793 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1424 transitions. [2023-09-01 13:51:48,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1424 transitions. [2023-09-01 13:51:48,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:48,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1424 transitions. [2023-09-01 13:51:48,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 118.66666666666667) internal successors, (1424), 12 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:48,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:48,799 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:48,799 INFO L175 Difference]: Start difference. First operand has 202 places, 482 transitions, 6570 flow. Second operand 12 states and 1424 transitions. [2023-09-01 13:51:48,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 719 transitions, 10963 flow [2023-09-01 13:51:49,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 719 transitions, 10479 flow, removed 190 selfloop flow, removed 5 redundant places. [2023-09-01 13:51:49,203 INFO L231 Difference]: Finished difference. Result has 212 places, 506 transitions, 6902 flow [2023-09-01 13:51:49,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6160, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6902, PETRI_PLACES=212, PETRI_TRANSITIONS=506} [2023-09-01 13:51:49,203 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2023-09-01 13:51:49,204 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 506 transitions, 6902 flow [2023-09-01 13:51:49,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 111.5) internal successors, (1784), 16 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:49,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:49,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:51:49,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:49,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 13:51:49,406 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:49,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:49,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2138929705, now seen corresponding path program 9 times [2023-09-01 13:51:49,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:49,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349228967] [2023-09-01 13:51:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:49,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:49,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:49,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349228967] [2023-09-01 13:51:49,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349228967] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:49,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005243965] [2023-09-01 13:51:49,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:51:49,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:49,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:49,536 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:49,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:51:49,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:51:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:49,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 13:51:49,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:49,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:49,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005243965] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:49,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:49,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 13:51:49,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855264019] [2023-09-01 13:51:49,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:49,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:51:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:51:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:51:50,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 267 [2023-09-01 13:51:50,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 506 transitions, 6902 flow. Second operand has 14 states, 14 states have (on average 115.85714285714286) internal successors, (1622), 14 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:50,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:50,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 267 [2023-09-01 13:51:50,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:50,859 INFO L130 PetriNetUnfolder]: 2958/4691 cut-off events. [2023-09-01 13:51:50,859 INFO L131 PetriNetUnfolder]: For 100043/100375 co-relation queries the response was YES. [2023-09-01 13:51:50,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39154 conditions, 4691 events. 2958/4691 cut-off events. For 100043/100375 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26952 event pairs, 473 based on Foata normal form. 368/4997 useless extension candidates. Maximal degree in co-relation 39073. Up to 1783 conditions per place. [2023-09-01 13:51:50,979 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 399 selfloop transitions, 60 changer transitions 6/506 dead transitions. [2023-09-01 13:51:50,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 506 transitions, 8174 flow [2023-09-01 13:51:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:51:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:51:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 976 transitions. [2023-09-01 13:51:50,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45692883895131087 [2023-09-01 13:51:50,981 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 976 transitions. [2023-09-01 13:51:50,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 976 transitions. [2023-09-01 13:51:50,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:50,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 976 transitions. [2023-09-01 13:51:50,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:50,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:50,985 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:50,986 INFO L175 Difference]: Start difference. First operand has 212 places, 506 transitions, 6902 flow. Second operand 8 states and 976 transitions. [2023-09-01 13:51:50,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 506 transitions, 8174 flow [2023-09-01 13:51:51,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 506 transitions, 8079 flow, removed 45 selfloop flow, removed 11 redundant places. [2023-09-01 13:51:51,286 INFO L231 Difference]: Finished difference. Result has 200 places, 438 transitions, 6465 flow [2023-09-01 13:51:51,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6184, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6465, PETRI_PLACES=200, PETRI_TRANSITIONS=438} [2023-09-01 13:51:51,286 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-09-01 13:51:51,287 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 438 transitions, 6465 flow [2023-09-01 13:51:51,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 115.85714285714286) internal successors, (1622), 14 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:51,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:51,287 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, 1] [2023-09-01 13:51:51,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:51,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 13:51:51,488 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:51,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1906507639, now seen corresponding path program 2 times [2023-09-01 13:51:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:51,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672556862] [2023-09-01 13:51:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:51,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:51,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:51,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672556862] [2023-09-01 13:51:51,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672556862] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:51,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111576143] [2023-09-01 13:51:51,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:51:51,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:51,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:51,602 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:51,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:51:51,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:51:51,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:51,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 13:51:51,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:51:51,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:51:51,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111576143] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:51,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:51,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-09-01 13:51:51,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79837846] [2023-09-01 13:51:51,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:51,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:51:51,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:51:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:51:52,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-09-01 13:51:52,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 438 transitions, 6465 flow. Second operand has 16 states, 16 states have (on average 112.6875) internal successors, (1803), 16 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:52,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:52,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-09-01 13:51:52,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:53,186 INFO L130 PetriNetUnfolder]: 2974/4799 cut-off events. [2023-09-01 13:51:53,186 INFO L131 PetriNetUnfolder]: For 92869/92911 co-relation queries the response was YES. [2023-09-01 13:51:53,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37009 conditions, 4799 events. 2974/4799 cut-off events. For 92869/92911 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28189 event pairs, 267 based on Foata normal form. 374/5163 useless extension candidates. Maximal degree in co-relation 36933. Up to 1848 conditions per place. [2023-09-01 13:51:53,229 INFO L137 encePairwiseOnDemand]: 258/267 looper letters, 467 selfloop transitions, 65 changer transitions 20/572 dead transitions. [2023-09-01 13:51:53,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 572 transitions, 9052 flow [2023-09-01 13:51:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:51:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:51:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1415 transitions. [2023-09-01 13:51:53,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416354556803995 [2023-09-01 13:51:53,231 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1415 transitions. [2023-09-01 13:51:53,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1415 transitions. [2023-09-01 13:51:53,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:53,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1415 transitions. [2023-09-01 13:51:53,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 117.91666666666667) internal successors, (1415), 12 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:53,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:53,237 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:53,237 INFO L175 Difference]: Start difference. First operand has 200 places, 438 transitions, 6465 flow. Second operand 12 states and 1415 transitions. [2023-09-01 13:51:53,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 572 transitions, 9052 flow [2023-09-01 13:51:53,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 572 transitions, 8866 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-09-01 13:51:53,542 INFO L231 Difference]: Finished difference. Result has 205 places, 387 transitions, 5780 flow [2023-09-01 13:51:53,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5780, PETRI_PLACES=205, PETRI_TRANSITIONS=387} [2023-09-01 13:51:53,542 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2023-09-01 13:51:53,542 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 387 transitions, 5780 flow [2023-09-01 13:51:53,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 112.6875) internal successors, (1803), 16 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:53,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:53,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:51:53,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:53,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:53,744 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:53,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 267708470, now seen corresponding path program 10 times [2023-09-01 13:51:53,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:53,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049409756] [2023-09-01 13:51:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:53,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:53,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:53,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049409756] [2023-09-01 13:51:53,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049409756] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:53,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497969105] [2023-09-01 13:51:53,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:51:53,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:53,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:53,834 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:53,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:51:53,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:51:53,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:53,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:51:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:54,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:51:54,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497969105] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:54,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:54,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 18 [2023-09-01 13:51:54,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026144639] [2023-09-01 13:51:54,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:54,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:51:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:51:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:51:54,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 267 [2023-09-01 13:51:54,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 387 transitions, 5780 flow. Second operand has 18 states, 18 states have (on average 109.05555555555556) internal successors, (1963), 18 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:54,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:54,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 267 [2023-09-01 13:51:54,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:55,911 INFO L130 PetriNetUnfolder]: 2676/4433 cut-off events. [2023-09-01 13:51:55,911 INFO L131 PetriNetUnfolder]: For 96592/96592 co-relation queries the response was YES. [2023-09-01 13:51:55,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37214 conditions, 4433 events. 2676/4433 cut-off events. For 96592/96592 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25616 event pairs, 472 based on Foata normal form. 234/4667 useless extension candidates. Maximal degree in co-relation 37139. Up to 1654 conditions per place. [2023-09-01 13:51:55,944 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 336 selfloop transitions, 151 changer transitions 147/634 dead transitions. [2023-09-01 13:51:55,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 634 transitions, 10670 flow [2023-09-01 13:51:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 13:51:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 13:51:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3757 transitions. [2023-09-01 13:51:55,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42639881965724663 [2023-09-01 13:51:55,947 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3757 transitions. [2023-09-01 13:51:55,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3757 transitions. [2023-09-01 13:51:55,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:55,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3757 transitions. [2023-09-01 13:51:55,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 113.84848484848484) internal successors, (3757), 33 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:55,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:55,960 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:55,961 INFO L175 Difference]: Start difference. First operand has 205 places, 387 transitions, 5780 flow. Second operand 33 states and 3757 transitions. [2023-09-01 13:51:55,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 634 transitions, 10670 flow [2023-09-01 13:51:56,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 634 transitions, 10118 flow, removed 146 selfloop flow, removed 12 redundant places. [2023-09-01 13:51:56,226 INFO L231 Difference]: Finished difference. Result has 240 places, 301 transitions, 5165 flow [2023-09-01 13:51:56,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4759, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5165, PETRI_PLACES=240, PETRI_TRANSITIONS=301} [2023-09-01 13:51:56,227 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2023-09-01 13:51:56,227 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 301 transitions, 5165 flow [2023-09-01 13:51:56,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.05555555555556) internal successors, (1963), 18 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:56,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:56,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:51:56,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:56,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 13:51:56,433 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:51:56,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:56,434 INFO L85 PathProgramCache]: Analyzing trace with hash -421217089, now seen corresponding path program 11 times [2023-09-01 13:51:56,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:56,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841823378] [2023-09-01 13:51:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:56,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:56,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:56,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841823378] [2023-09-01 13:51:56,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841823378] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:56,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256530105] [2023-09-01 13:51:56,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:51:56,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:56,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:56,561 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:51:56,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:51:56,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:51:56,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:56,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:51:56,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:51:56,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:51:56,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256530105] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:56,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:56,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-09-01 13:51:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532057810] [2023-09-01 13:51:56,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:56,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:51:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:51:56,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:51:57,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-09-01 13:51:57,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 301 transitions, 5165 flow. Second operand has 21 states, 21 states have (on average 107.28571428571429) internal successors, (2253), 21 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:57,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:57,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-09-01 13:51:57,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:00,143 INFO L130 PetriNetUnfolder]: 3770/5799 cut-off events. [2023-09-01 13:52:00,143 INFO L131 PetriNetUnfolder]: For 169305/169305 co-relation queries the response was YES. [2023-09-01 13:52:00,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58170 conditions, 5799 events. 3770/5799 cut-off events. For 169305/169305 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31051 event pairs, 194 based on Foata normal form. 44/5843 useless extension candidates. Maximal degree in co-relation 58083. Up to 2106 conditions per place. [2023-09-01 13:52:00,204 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 514 selfloop transitions, 484 changer transitions 0/998 dead transitions. [2023-09-01 13:52:00,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 998 transitions, 18849 flow [2023-09-01 13:52:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-09-01 13:52:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-09-01 13:52:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 7601 transitions. [2023-09-01 13:52:00,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418649482264816 [2023-09-01 13:52:00,212 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 7601 transitions. [2023-09-01 13:52:00,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 7601 transitions. [2023-09-01 13:52:00,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:00,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 7601 transitions. [2023-09-01 13:52:00,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 111.77941176470588) internal successors, (7601), 68 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:00,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 267.0) internal successors, (18423), 69 states have internal predecessors, (18423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:00,236 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 267.0) internal successors, (18423), 69 states have internal predecessors, (18423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:00,236 INFO L175 Difference]: Start difference. First operand has 240 places, 301 transitions, 5165 flow. Second operand 68 states and 7601 transitions. [2023-09-01 13:52:00,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 998 transitions, 18849 flow [2023-09-01 13:52:00,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 998 transitions, 16228 flow, removed 1186 selfloop flow, removed 21 redundant places. [2023-09-01 13:52:00,807 INFO L231 Difference]: Finished difference. Result has 270 places, 615 transitions, 11397 flow [2023-09-01 13:52:00,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=11397, PETRI_PLACES=270, PETRI_TRANSITIONS=615} [2023-09-01 13:52:00,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2023-09-01 13:52:00,808 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 615 transitions, 11397 flow [2023-09-01 13:52:00,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.28571428571429) internal successors, (2253), 21 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:00,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:00,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:00,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-09-01 13:52:01,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 13:52:01,015 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:52:01,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1654813385, now seen corresponding path program 12 times [2023-09-01 13:52:01,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:01,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650929318] [2023-09-01 13:52:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:01,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:52:01,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:52:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650929318] [2023-09-01 13:52:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650929318] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:52:01,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704702619] [2023-09-01 13:52:01,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:52:01,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:01,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:52:01,145 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:52:01,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:52:01,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:52:01,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:52:01,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:52:01,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:52:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:52:01,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:52:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:52:01,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704702619] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:52:01,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:52:01,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-09-01 13:52:01,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383706345] [2023-09-01 13:52:01,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:52:01,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:52:01,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:52:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:52:01,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:52:01,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-09-01 13:52:01,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 615 transitions, 11397 flow. Second operand has 20 states, 20 states have (on average 111.4) internal successors, (2228), 20 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:01,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:52:01,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-09-01 13:52:01,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:03,104 INFO L130 PetriNetUnfolder]: 3756/5827 cut-off events. [2023-09-01 13:52:03,104 INFO L131 PetriNetUnfolder]: For 192034/192040 co-relation queries the response was YES. [2023-09-01 13:52:03,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59025 conditions, 5827 events. 3756/5827 cut-off events. For 192034/192040 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31757 event pairs, 588 based on Foata normal form. 58/5878 useless extension candidates. Maximal degree in co-relation 58929. Up to 2790 conditions per place. [2023-09-01 13:52:03,173 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 553 selfloop transitions, 176 changer transitions 0/765 dead transitions. [2023-09-01 13:52:03,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 765 transitions, 15928 flow [2023-09-01 13:52:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:52:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:52:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1049 transitions. [2023-09-01 13:52:03,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43653766125676235 [2023-09-01 13:52:03,174 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1049 transitions. [2023-09-01 13:52:03,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1049 transitions. [2023-09-01 13:52:03,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:03,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1049 transitions. [2023-09-01 13:52:03,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.55555555555556) internal successors, (1049), 9 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:03,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:03,177 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:03,177 INFO L175 Difference]: Start difference. First operand has 270 places, 615 transitions, 11397 flow. Second operand 9 states and 1049 transitions. [2023-09-01 13:52:03,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 765 transitions, 15928 flow [2023-09-01 13:52:04,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 765 transitions, 12716 flow, removed 1330 selfloop flow, removed 13 redundant places. [2023-09-01 13:52:04,027 INFO L231 Difference]: Finished difference. Result has 268 places, 652 transitions, 10006 flow [2023-09-01 13:52:04,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10006, PETRI_PLACES=268, PETRI_TRANSITIONS=652} [2023-09-01 13:52:04,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2023-09-01 13:52:04,028 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 652 transitions, 10006 flow [2023-09-01 13:52:04,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.4) internal successors, (2228), 20 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:04,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:04,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:04,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 13:52:04,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 13:52:04,229 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:52:04,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:04,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2126703127, now seen corresponding path program 13 times [2023-09-01 13:52:04,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:04,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174400897] [2023-09-01 13:52:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:04,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:04,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:52:04,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174400897] [2023-09-01 13:52:04,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174400897] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:52:04,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854448309] [2023-09-01 13:52:04,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:52:04,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:04,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:52:04,361 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:52:04,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 13:52:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:52:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:52:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:04,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:52:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:04,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854448309] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:52:04,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:52:04,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-09-01 13:52:04,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835664517] [2023-09-01 13:52:04,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:52:04,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:52:04,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:52:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:52:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:52:04,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-09-01 13:52:04,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 652 transitions, 10006 flow. Second operand has 21 states, 21 states have (on average 110.85714285714286) internal successors, (2328), 21 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:04,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:52:04,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-09-01 13:52:04,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:06,477 INFO L130 PetriNetUnfolder]: 3815/5935 cut-off events. [2023-09-01 13:52:06,477 INFO L131 PetriNetUnfolder]: For 162297/162301 co-relation queries the response was YES. [2023-09-01 13:52:06,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53997 conditions, 5935 events. 3815/5935 cut-off events. For 162297/162301 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32741 event pairs, 547 based on Foata normal form. 54/5975 useless extension candidates. Maximal degree in co-relation 53903. Up to 2837 conditions per place. [2023-09-01 13:52:06,545 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 554 selfloop transitions, 274 changer transitions 0/864 dead transitions. [2023-09-01 13:52:06,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 864 transitions, 15143 flow [2023-09-01 13:52:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 13:52:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 13:52:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1637 transitions. [2023-09-01 13:52:06,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379347244515784 [2023-09-01 13:52:06,548 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1637 transitions. [2023-09-01 13:52:06,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1637 transitions. [2023-09-01 13:52:06,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:06,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1637 transitions. [2023-09-01 13:52:06,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.92857142857143) internal successors, (1637), 14 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:06,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 267.0) internal successors, (4005), 15 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:06,553 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 267.0) internal successors, (4005), 15 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:06,553 INFO L175 Difference]: Start difference. First operand has 268 places, 652 transitions, 10006 flow. Second operand 14 states and 1637 transitions. [2023-09-01 13:52:06,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 864 transitions, 15143 flow [2023-09-01 13:52:07,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 864 transitions, 14956 flow, removed 91 selfloop flow, removed 3 redundant places. [2023-09-01 13:52:07,157 INFO L231 Difference]: Finished difference. Result has 282 places, 733 transitions, 12187 flow [2023-09-01 13:52:07,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=9873, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12187, PETRI_PLACES=282, PETRI_TRANSITIONS=733} [2023-09-01 13:52:07,158 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 252 predicate places. [2023-09-01 13:52:07,158 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 733 transitions, 12187 flow [2023-09-01 13:52:07,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.85714285714286) internal successors, (2328), 21 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:07,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:07,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:07,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 13:52:07,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:07,360 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:52:07,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2112852909, now seen corresponding path program 14 times [2023-09-01 13:52:07,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:07,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484962576] [2023-09-01 13:52:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:07,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:07,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:52:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484962576] [2023-09-01 13:52:07,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484962576] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:52:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785059573] [2023-09-01 13:52:07,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:52:07,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:07,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:52:07,502 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:52:07,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 13:52:07,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:52:07,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:52:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:52:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:52:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:07,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:52:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:07,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785059573] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:52:07,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:52:07,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-09-01 13:52:07,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649889668] [2023-09-01 13:52:07,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:52:07,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:52:07,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:52:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:52:07,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:52:08,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-09-01 13:52:08,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 733 transitions, 12187 flow. Second operand has 22 states, 22 states have (on average 110.81818181818181) internal successors, (2438), 22 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:08,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:52:08,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-09-01 13:52:08,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:09,499 INFO L130 PetriNetUnfolder]: 3750/5798 cut-off events. [2023-09-01 13:52:09,499 INFO L131 PetriNetUnfolder]: For 152279/152283 co-relation queries the response was YES. [2023-09-01 13:52:09,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53707 conditions, 5798 events. 3750/5798 cut-off events. For 152279/152283 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31421 event pairs, 567 based on Foata normal form. 48/5832 useless extension candidates. Maximal degree in co-relation 53609. Up to 2837 conditions per place. [2023-09-01 13:52:09,569 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 513 selfloop transitions, 261 changer transitions 0/809 dead transitions. [2023-09-01 13:52:09,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 809 transitions, 14860 flow [2023-09-01 13:52:09,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:52:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:52:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1169 transitions. [2023-09-01 13:52:09,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378277153558052 [2023-09-01 13:52:09,570 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1169 transitions. [2023-09-01 13:52:09,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1169 transitions. [2023-09-01 13:52:09,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:09,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1169 transitions. [2023-09-01 13:52:09,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.9) internal successors, (1169), 10 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:09,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:09,574 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:09,574 INFO L175 Difference]: Start difference. First operand has 282 places, 733 transitions, 12187 flow. Second operand 10 states and 1169 transitions. [2023-09-01 13:52:09,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 809 transitions, 14860 flow [2023-09-01 13:52:10,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 809 transitions, 14506 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-09-01 13:52:10,195 INFO L231 Difference]: Finished difference. Result has 285 places, 726 transitions, 12247 flow [2023-09-01 13:52:10,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11725, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12247, PETRI_PLACES=285, PETRI_TRANSITIONS=726} [2023-09-01 13:52:10,196 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2023-09-01 13:52:10,196 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 726 transitions, 12247 flow [2023-09-01 13:52:10,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 110.81818181818181) internal successors, (2438), 22 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:10,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:10,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:10,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 13:52:10,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:10,397 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:52:10,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:10,398 INFO L85 PathProgramCache]: Analyzing trace with hash -710293371, now seen corresponding path program 15 times [2023-09-01 13:52:10,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:10,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675333107] [2023-09-01 13:52:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:10,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:52:10,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:52:10,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675333107] [2023-09-01 13:52:10,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675333107] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:52:10,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534063348] [2023-09-01 13:52:10,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:52:10,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:10,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:52:10,521 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:52:10,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 13:52:10,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:52:10,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:52:10,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:52:10,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:52:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:52:10,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:52:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:52:10,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534063348] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:52:10,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:52:10,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-09-01 13:52:10,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975123677] [2023-09-01 13:52:10,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:52:10,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:52:10,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:52:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:52:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:52:11,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-09-01 13:52:11,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 726 transitions, 12247 flow. Second operand has 20 states, 20 states have (on average 111.15) internal successors, (2223), 20 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:11,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:52:11,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-09-01 13:52:11,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:12,528 INFO L130 PetriNetUnfolder]: 3816/5907 cut-off events. [2023-09-01 13:52:12,528 INFO L131 PetriNetUnfolder]: For 148796/148817 co-relation queries the response was YES. [2023-09-01 13:52:12,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54386 conditions, 5907 events. 3816/5907 cut-off events. For 148796/148817 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32272 event pairs, 449 based on Foata normal form. 55/5945 useless extension candidates. Maximal degree in co-relation 54288. Up to 2467 conditions per place. [2023-09-01 13:52:12,599 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 457 selfloop transitions, 324 changer transitions 0/816 dead transitions. [2023-09-01 13:52:12,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 816 transitions, 15247 flow [2023-09-01 13:52:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:52:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:52:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1048 transitions. [2023-09-01 13:52:12,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43612151477320016 [2023-09-01 13:52:12,601 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1048 transitions. [2023-09-01 13:52:12,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1048 transitions. [2023-09-01 13:52:12,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:12,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1048 transitions. [2023-09-01 13:52:12,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.44444444444444) internal successors, (1048), 9 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:12,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:12,603 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:12,603 INFO L175 Difference]: Start difference. First operand has 285 places, 726 transitions, 12247 flow. Second operand 9 states and 1048 transitions. [2023-09-01 13:52:12,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 816 transitions, 15247 flow [2023-09-01 13:52:13,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 816 transitions, 14846 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-09-01 13:52:13,165 INFO L231 Difference]: Finished difference. Result has 287 places, 744 transitions, 13007 flow [2023-09-01 13:52:13,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11865, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13007, PETRI_PLACES=287, PETRI_TRANSITIONS=744} [2023-09-01 13:52:13,166 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2023-09-01 13:52:13,166 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 744 transitions, 13007 flow [2023-09-01 13:52:13,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.15) internal successors, (2223), 20 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:13,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:13,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:13,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 13:52:13,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-09-01 13:52:13,367 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:52:13,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1132259183, now seen corresponding path program 16 times [2023-09-01 13:52:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:13,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364167519] [2023-09-01 13:52:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:13,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:52:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364167519] [2023-09-01 13:52:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364167519] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:52:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582690230] [2023-09-01 13:52:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:52:13,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:52:13,484 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:52:13,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 13:52:13,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:52:13,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:52:13,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:52:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:52:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:13,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:52:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:13,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582690230] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:52:13,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:52:13,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 13:52:13,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581023510] [2023-09-01 13:52:13,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:52:13,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:52:13,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:52:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:52:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:52:14,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-09-01 13:52:14,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 744 transitions, 13007 flow. Second operand has 20 states, 20 states have (on average 107.05) internal successors, (2141), 20 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:14,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:52:14,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-09-01 13:52:14,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:16,417 INFO L130 PetriNetUnfolder]: 4032/6165 cut-off events. [2023-09-01 13:52:16,417 INFO L131 PetriNetUnfolder]: For 161246/161246 co-relation queries the response was YES. [2023-09-01 13:52:16,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57813 conditions, 6165 events. 4032/6165 cut-off events. For 161246/161246 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32954 event pairs, 322 based on Foata normal form. 48/6213 useless extension candidates. Maximal degree in co-relation 57713. Up to 2100 conditions per place. [2023-09-01 13:52:16,491 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 458 selfloop transitions, 511 changer transitions 0/969 dead transitions. [2023-09-01 13:52:16,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 969 transitions, 18309 flow [2023-09-01 13:52:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 13:52:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 13:52:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4147 transitions. [2023-09-01 13:52:16,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197793298916894 [2023-09-01 13:52:16,495 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4147 transitions. [2023-09-01 13:52:16,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4147 transitions. [2023-09-01 13:52:16,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:16,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4147 transitions. [2023-09-01 13:52:16,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 112.08108108108108) internal successors, (4147), 37 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:16,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:16,508 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:16,508 INFO L175 Difference]: Start difference. First operand has 287 places, 744 transitions, 13007 flow. Second operand 37 states and 4147 transitions. [2023-09-01 13:52:16,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 969 transitions, 18309 flow [2023-09-01 13:52:17,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 969 transitions, 18016 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-09-01 13:52:17,204 INFO L231 Difference]: Finished difference. Result has 313 places, 751 transitions, 14178 flow [2023-09-01 13:52:17,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=12512, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14178, PETRI_PLACES=313, PETRI_TRANSITIONS=751} [2023-09-01 13:52:17,204 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2023-09-01 13:52:17,205 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 751 transitions, 14178 flow [2023-09-01 13:52:17,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.05) internal successors, (2141), 20 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:17,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:17,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:17,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 13:52:17,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 13:52:17,406 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:52:17,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash -409751995, now seen corresponding path program 17 times [2023-09-01 13:52:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:17,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629720361] [2023-09-01 13:52:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:17,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:52:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629720361] [2023-09-01 13:52:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629720361] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:52:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360702167] [2023-09-01 13:52:17,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:52:17,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:17,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:52:17,525 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:52:17,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 13:52:17,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:52:17,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:52:17,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:52:17,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:52:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:17,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:52:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:52:17,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360702167] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:52:17,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:52:17,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-09-01 13:52:17,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352066328] [2023-09-01 13:52:17,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:52:17,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:52:17,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:52:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:52:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:52:18,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-09-01 13:52:18,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 751 transitions, 14178 flow. Second operand has 18 states, 18 states have (on average 107.44444444444444) internal successors, (1934), 18 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:18,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:52:18,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-09-01 13:52:18,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:19,816 INFO L130 PetriNetUnfolder]: 3960/6021 cut-off events. [2023-09-01 13:52:19,816 INFO L131 PetriNetUnfolder]: For 170854/170854 co-relation queries the response was YES. [2023-09-01 13:52:19,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58580 conditions, 6021 events. 3960/6021 cut-off events. For 170854/170854 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 31814 event pairs, 736 based on Foata normal form. 54/6067 useless extension candidates. Maximal degree in co-relation 58479. Up to 4351 conditions per place. [2023-09-01 13:52:19,890 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 574 selfloop transitions, 268 changer transitions 0/842 dead transitions. [2023-09-01 13:52:19,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 842 transitions, 17075 flow [2023-09-01 13:52:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:52:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:52:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2116 transitions. [2023-09-01 13:52:19,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41711019120835796 [2023-09-01 13:52:19,893 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2116 transitions. [2023-09-01 13:52:19,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2116 transitions. [2023-09-01 13:52:19,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:19,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2116 transitions. [2023-09-01 13:52:19,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.36842105263158) internal successors, (2116), 19 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:19,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:19,899 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:19,899 INFO L175 Difference]: Start difference. First operand has 313 places, 751 transitions, 14178 flow. Second operand 19 states and 2116 transitions. [2023-09-01 13:52:19,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 842 transitions, 17075 flow [2023-09-01 13:52:20,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 842 transitions, 16345 flow, removed 32 selfloop flow, removed 28 redundant places. [2023-09-01 13:52:20,623 INFO L231 Difference]: Finished difference. Result has 306 places, 751 transitions, 13891 flow [2023-09-01 13:52:20,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=13147, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13891, PETRI_PLACES=306, PETRI_TRANSITIONS=751} [2023-09-01 13:52:20,624 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2023-09-01 13:52:20,624 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 751 transitions, 13891 flow [2023-09-01 13:52:20,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.44444444444444) internal successors, (1934), 18 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:20,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:20,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:20,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-09-01 13:52:20,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:20,831 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:52:20,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1627145777, now seen corresponding path program 3 times [2023-09-01 13:52:20,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:20,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86150199] [2023-09-01 13:52:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:20,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:52:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:52:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86150199] [2023-09-01 13:52:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86150199] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:52:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516254800] [2023-09-01 13:52:21,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:52:21,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:21,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:52:21,833 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:52:21,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 13:52:21,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:52:21,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:52:21,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2023-09-01 13:52:21,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:52:22,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:52:22,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 89 [2023-09-01 13:52:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:52:23,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:52:27,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:52:27,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 691 treesize of output 1179 [2023-09-01 13:52:31,753 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 13:52:55,520 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 13:54:14,185 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 13:55:47,987 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-09-01 14:01:15,053 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 14:03:43,491 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. Killed by 15