./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:13:13,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:13:13,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:13:13,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:13:13,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:13:13,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:13:13,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:13:13,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:13:13,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:13:13,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:13:13,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:13:13,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:13:13,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:13:13,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:13:13,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:13:13,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:13:13,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:13:13,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:13:13,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:13:13,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:13:13,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:13:13,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:13:13,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:13:13,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:13:13,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:13:13,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:13:13,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:13:13,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:13:13,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:13:13,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:13:13,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:13:13,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:13:13,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:13:13,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:13:13,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:13:13,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:13:13,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:13:13,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:13:13,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:13:13,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:13:13,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:13:13,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:13:13,339 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:13:13,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:13:13,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:13:13,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:13:13,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:13:13,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:13:13,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:13:13,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:13:13,343 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:13:13,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:13:13,344 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:13:13,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:13:13,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:13:13,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:13:13,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:13:13,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:13:13,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:13:13,345 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:13:13,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:13:13,345 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:13:13,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:13:13,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:13:13,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:13:13,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:13:13,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:13:13,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:13:13,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:13:13,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:13:13,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:13:13,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:13:13,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:13:13,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:13:13,347 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:13:13,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:13:13,348 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:13:13,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:13:13,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:13:13,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:13:13,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:13:13,660 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:13:13,661 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:13:13,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 21:13:14,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:13:15,104 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:13:15,105 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 21:13:15,112 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f389783c/ef0399236acb4974b0f6a2ad4433c9f1/FLAG575ef4a1e [2023-08-30 21:13:15,131 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f389783c/ef0399236acb4974b0f6a2ad4433c9f1 [2023-08-30 21:13:15,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:13:15,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:13:15,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:13:15,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:13:15,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:13:15,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a7f958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15, skipping insertion in model container [2023-08-30 21:13:15,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:13:15,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:13:15,321 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-30 21:13:15,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:13:15,334 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:13:15,357 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-30 21:13:15,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:13:15,369 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:13:15,369 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:13:15,374 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:13:15,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15 WrapperNode [2023-08-30 21:13:15,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:13:15,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:13:15,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:13:15,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:13:15,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,408 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2023-08-30 21:13:15,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:13:15,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:13:15,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:13:15,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:13:15,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,443 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:13:15,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:13:15,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:13:15,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:13:15,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (1/1) ... [2023-08-30 21:13:15,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:13:15,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:15,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 21:13:15,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 21:13:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:13:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:13:15,510 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:13:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:13:15,510 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:13:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:13:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:13:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:13:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:13:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:13:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:13:15,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:13:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:13:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:13:15,513 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:13:15,630 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:13:15,631 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:13:15,841 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:13:15,889 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:13:15,892 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 21:13:15,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:13:15 BoogieIcfgContainer [2023-08-30 21:13:15,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:13:15,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:13:15,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:13:15,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:13:15,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:13:15" (1/3) ... [2023-08-30 21:13:15,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595a1fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:13:15, skipping insertion in model container [2023-08-30 21:13:15,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:13:15" (2/3) ... [2023-08-30 21:13:15,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595a1fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:13:15, skipping insertion in model container [2023-08-30 21:13:15,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:13:15" (3/3) ... [2023-08-30 21:13:15,903 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 21:13:15,909 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:13:15,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:13:15,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:13:15,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:13:15,995 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:13:16,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2023-08-30 21:13:16,093 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2023-08-30 21:13:16,093 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:13:16,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 21:13:16,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2023-08-30 21:13:16,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-08-30 21:13:16,106 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:13:16,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-08-30 21:13:16,117 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-08-30 21:13:16,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-08-30 21:13:16,137 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2023-08-30 21:13:16,137 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:13:16,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 21:13:16,138 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-08-30 21:13:18,205 INFO L134 LiptonReduction]: Checked pairs total: 449 [2023-08-30 21:13:18,205 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-30 21:13:18,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:13:18,219 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;@5ac2881a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:13:18,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:13:18,223 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 21:13:18,223 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:13:18,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:18,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:18,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:18,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:18,228 INFO L85 PathProgramCache]: Analyzing trace with hash -507941003, now seen corresponding path program 1 times [2023-08-30 21:13:18,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:18,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31979250] [2023-08-30 21:13:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:18,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:18,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31979250] [2023-08-30 21:13:18,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31979250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:13:18,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:13:18,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:13:18,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983726307] [2023-08-30 21:13:18,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:13:18,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:13:18,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:13:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:13:18,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-08-30 21:13:18,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:18,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:18,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-08-30 21:13:18,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:18,761 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2023-08-30 21:13:18,761 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 21:13:18,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 95 events. 54/95 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 238 event pairs, 10 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 160. Up to 73 conditions per place. [2023-08-30 21:13:18,778 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-30 21:13:18,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-30 21:13:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:13:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:13:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-30 21:13:18,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706896551724138 [2023-08-30 21:13:18,797 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-30 21:13:18,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-30 21:13:18,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:18,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-30 21:13:18,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:18,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:18,812 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:18,814 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 273 transitions. [2023-08-30 21:13:18,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-30 21:13:18,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:13:18,818 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-30 21:13:18,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-30 21:13:18,824 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-30 21:13:18,824 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-30 21:13:18,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:18,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:18,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:18,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:13:18,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:18,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:18,837 INFO L85 PathProgramCache]: Analyzing trace with hash -259176130, now seen corresponding path program 1 times [2023-08-30 21:13:18,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303540351] [2023-08-30 21:13:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:13:18,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303540351] [2023-08-30 21:13:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303540351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:13:18,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:13:18,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:13:18,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380216418] [2023-08-30 21:13:18,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:13:18,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:13:18,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:13:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:13:18,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 145 [2023-08-30 21:13:18,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:18,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:18,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 145 [2023-08-30 21:13:18,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:19,008 INFO L130 PetriNetUnfolder]: 51/93 cut-off events. [2023-08-30 21:13:19,009 INFO L131 PetriNetUnfolder]: For 22/31 co-relation queries the response was YES. [2023-08-30 21:13:19,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 93 events. 51/93 cut-off events. For 22/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 204 event pairs, 24 based on Foata normal form. 9/84 useless extension candidates. Maximal degree in co-relation 154. Up to 73 conditions per place. [2023-08-30 21:13:19,010 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-30 21:13:19,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 114 flow [2023-08-30 21:13:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:13:19,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:13:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 277 transitions. [2023-08-30 21:13:19,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47758620689655173 [2023-08-30 21:13:19,012 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 277 transitions. [2023-08-30 21:13:19,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 277 transitions. [2023-08-30 21:13:19,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:19,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 277 transitions. [2023-08-30 21:13:19,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:19,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:19,015 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:19,015 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 277 transitions. [2023-08-30 21:13:19,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 114 flow [2023-08-30 21:13:19,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 105 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 21:13:19,017 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-08-30 21:13:19,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-30 21:13:19,018 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-08-30 21:13:19,018 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-08-30 21:13:19,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:19,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:19,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:19,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:13:19,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:19,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:19,019 INFO L85 PathProgramCache]: Analyzing trace with hash 746860219, now seen corresponding path program 1 times [2023-08-30 21:13:19,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:19,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321913088] [2023-08-30 21:13:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:19,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321913088] [2023-08-30 21:13:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321913088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688067089] [2023-08-30 21:13:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:19,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:19,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:19,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:13:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:19,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:13:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:19,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:20,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688067089] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:20,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:20,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 21:13:20,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30640758] [2023-08-30 21:13:20,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:20,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:13:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:13:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:13:20,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:20,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:20,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:20,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:20,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:20,798 INFO L130 PetriNetUnfolder]: 167/315 cut-off events. [2023-08-30 21:13:20,798 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-30 21:13:20,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 315 events. 167/315 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1203 event pairs, 5 based on Foata normal form. 3/244 useless extension candidates. Maximal degree in co-relation 238. Up to 109 conditions per place. [2023-08-30 21:13:20,801 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 53 selfloop transitions, 26 changer transitions 39/118 dead transitions. [2023-08-30 21:13:20,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 118 transitions, 612 flow [2023-08-30 21:13:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 21:13:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 21:13:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1160 transitions. [2023-08-30 21:13:20,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-30 21:13:20,804 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1160 transitions. [2023-08-30 21:13:20,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1160 transitions. [2023-08-30 21:13:20,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:20,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1160 transitions. [2023-08-30 21:13:20,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:20,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:20,816 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:20,816 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 18 states and 1160 transitions. [2023-08-30 21:13:20,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 118 transitions, 612 flow [2023-08-30 21:13:20,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 118 transitions, 580 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 21:13:20,821 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 249 flow [2023-08-30 21:13:20,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=249, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-30 21:13:20,822 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-08-30 21:13:20,822 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 249 flow [2023-08-30 21:13:20,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:20,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:20,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:20,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:21,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:21,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:21,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash 979621307, now seen corresponding path program 2 times [2023-08-30 21:13:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:21,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261288041] [2023-08-30 21:13:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:21,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:21,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261288041] [2023-08-30 21:13:21,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261288041] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:21,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994944142] [2023-08-30 21:13:21,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:13:21,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:21,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:21,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:21,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:13:21,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:13:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:13:21,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:21,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:21,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994944142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:21,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:21,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:13:21,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972573548] [2023-08-30 21:13:21,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:21,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:13:21,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:13:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:13:21,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:21,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 249 flow. Second operand has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:21,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:21,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:21,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:23,071 INFO L130 PetriNetUnfolder]: 304/598 cut-off events. [2023-08-30 21:13:23,071 INFO L131 PetriNetUnfolder]: For 1473/1473 co-relation queries the response was YES. [2023-08-30 21:13:23,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 598 events. 304/598 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2830 event pairs, 31 based on Foata normal form. 10/604 useless extension candidates. Maximal degree in co-relation 2310. Up to 228 conditions per place. [2023-08-30 21:13:23,077 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 95 selfloop transitions, 40 changer transitions 70/205 dead transitions. [2023-08-30 21:13:23,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 205 transitions, 1461 flow [2023-08-30 21:13:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:13:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:13:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2220 transitions. [2023-08-30 21:13:23,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4374384236453202 [2023-08-30 21:13:23,084 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2220 transitions. [2023-08-30 21:13:23,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2220 transitions. [2023-08-30 21:13:23,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:23,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2220 transitions. [2023-08-30 21:13:23,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 63.42857142857143) internal successors, (2220), 35 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:23,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:23,100 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:23,100 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 249 flow. Second operand 35 states and 2220 transitions. [2023-08-30 21:13:23,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 205 transitions, 1461 flow [2023-08-30 21:13:23,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 205 transitions, 1286 flow, removed 82 selfloop flow, removed 5 redundant places. [2023-08-30 21:13:23,116 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 613 flow [2023-08-30 21:13:23,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=613, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2023-08-30 21:13:23,118 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-08-30 21:13:23,118 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 613 flow [2023-08-30 21:13:23,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:23,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:23,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:23,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:23,324 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,SelfDestructingSolverStorable3 [2023-08-30 21:13:23,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:23,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash -632437385, now seen corresponding path program 3 times [2023-08-30 21:13:23,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:23,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952152112] [2023-08-30 21:13:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:23,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:23,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:23,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952152112] [2023-08-30 21:13:23,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952152112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:23,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097377730] [2023-08-30 21:13:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:13:23,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:23,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:23,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:23,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:13:23,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:13:23,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:23,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:13:23,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:23,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:23,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097377730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:23,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:23,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 21:13:23,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142001798] [2023-08-30 21:13:23,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:23,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:13:23,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:13:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:13:24,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:24,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 613 flow. Second operand has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:24,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:24,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:24,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:24,720 INFO L130 PetriNetUnfolder]: 289/582 cut-off events. [2023-08-30 21:13:24,720 INFO L131 PetriNetUnfolder]: For 5801/5801 co-relation queries the response was YES. [2023-08-30 21:13:24,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 582 events. 289/582 cut-off events. For 5801/5801 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2838 event pairs, 17 based on Foata normal form. 3/585 useless extension candidates. Maximal degree in co-relation 2915. Up to 159 conditions per place. [2023-08-30 21:13:24,726 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 73 selfloop transitions, 50 changer transitions 47/170 dead transitions. [2023-08-30 21:13:24,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 170 transitions, 1577 flow [2023-08-30 21:13:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 21:13:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 21:13:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1409 transitions. [2023-08-30 21:13:24,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441692789968652 [2023-08-30 21:13:24,731 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1409 transitions. [2023-08-30 21:13:24,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1409 transitions. [2023-08-30 21:13:24,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:24,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1409 transitions. [2023-08-30 21:13:24,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.04545454545455) internal successors, (1409), 22 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:24,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:24,740 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:24,740 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 613 flow. Second operand 22 states and 1409 transitions. [2023-08-30 21:13:24,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 170 transitions, 1577 flow [2023-08-30 21:13:24,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 170 transitions, 1367 flow, removed 104 selfloop flow, removed 11 redundant places. [2023-08-30 21:13:24,766 INFO L231 Difference]: Finished difference. Result has 107 places, 80 transitions, 699 flow [2023-08-30 21:13:24,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=699, PETRI_PLACES=107, PETRI_TRANSITIONS=80} [2023-08-30 21:13:24,768 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-08-30 21:13:24,768 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 80 transitions, 699 flow [2023-08-30 21:13:24,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:24,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:24,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:24,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:24,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:24,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:24,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2086276037, now seen corresponding path program 4 times [2023-08-30 21:13:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:24,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647754220] [2023-08-30 21:13:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:24,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647754220] [2023-08-30 21:13:25,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647754220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952376186] [2023-08-30 21:13:25,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:13:25,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:25,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:25,171 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:25,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:13:25,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:13:25,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:13:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:25,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:25,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952376186] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:25,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:25,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 21:13:25,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217142874] [2023-08-30 21:13:25,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:25,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:13:25,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:25,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:13:25,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:13:25,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:25,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 80 transitions, 699 flow. Second operand has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:25,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:25,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:25,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:26,314 INFO L130 PetriNetUnfolder]: 295/603 cut-off events. [2023-08-30 21:13:26,314 INFO L131 PetriNetUnfolder]: For 6131/6131 co-relation queries the response was YES. [2023-08-30 21:13:26,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 603 events. 295/603 cut-off events. For 6131/6131 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2999 event pairs, 29 based on Foata normal form. 2/603 useless extension candidates. Maximal degree in co-relation 3086. Up to 160 conditions per place. [2023-08-30 21:13:26,320 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 61 changer transitions 22/173 dead transitions. [2023-08-30 21:13:26,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1710 flow [2023-08-30 21:13:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 21:13:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 21:13:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1411 transitions. [2023-08-30 21:13:26,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44231974921630096 [2023-08-30 21:13:26,327 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1411 transitions. [2023-08-30 21:13:26,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1411 transitions. [2023-08-30 21:13:26,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:26,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1411 transitions. [2023-08-30 21:13:26,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:26,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:26,337 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:26,337 INFO L175 Difference]: Start difference. First operand has 107 places, 80 transitions, 699 flow. Second operand 22 states and 1411 transitions. [2023-08-30 21:13:26,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1710 flow [2023-08-30 21:13:26,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 1478 flow, removed 75 selfloop flow, removed 14 redundant places. [2023-08-30 21:13:26,378 INFO L231 Difference]: Finished difference. Result has 115 places, 91 transitions, 853 flow [2023-08-30 21:13:26,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=853, PETRI_PLACES=115, PETRI_TRANSITIONS=91} [2023-08-30 21:13:26,380 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-08-30 21:13:26,380 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 91 transitions, 853 flow [2023-08-30 21:13:26,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:26,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:26,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:26,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:26,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:26,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:26,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1344414463, now seen corresponding path program 5 times [2023-08-30 21:13:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119426554] [2023-08-30 21:13:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:26,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119426554] [2023-08-30 21:13:26,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119426554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:26,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892780480] [2023-08-30 21:13:26,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:13:26,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:26,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:26,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:26,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:13:26,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:13:26,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 21:13:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:27,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:27,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892780480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:27,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:27,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 21:13:27,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809762109] [2023-08-30 21:13:27,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:27,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:13:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:27,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:13:27,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-08-30 21:13:27,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:27,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 91 transitions, 853 flow. Second operand has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:27,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:27,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:27,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:28,026 INFO L130 PetriNetUnfolder]: 277/579 cut-off events. [2023-08-30 21:13:28,026 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2023-08-30 21:13:28,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 579 events. 277/579 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2886 event pairs, 5 based on Foata normal form. 1/578 useless extension candidates. Maximal degree in co-relation 2934. Up to 300 conditions per place. [2023-08-30 21:13:28,032 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 80 selfloop transitions, 49 changer transitions 20/149 dead transitions. [2023-08-30 21:13:28,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 149 transitions, 1482 flow [2023-08-30 21:13:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:13:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:13:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1081 transitions. [2023-08-30 21:13:28,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385395537525355 [2023-08-30 21:13:28,035 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1081 transitions. [2023-08-30 21:13:28,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1081 transitions. [2023-08-30 21:13:28,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:28,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1081 transitions. [2023-08-30 21:13:28,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.588235294117645) internal successors, (1081), 17 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:28,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:28,041 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:28,041 INFO L175 Difference]: Start difference. First operand has 115 places, 91 transitions, 853 flow. Second operand 17 states and 1081 transitions. [2023-08-30 21:13:28,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 149 transitions, 1482 flow [2023-08-30 21:13:28,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 149 transitions, 1285 flow, removed 43 selfloop flow, removed 13 redundant places. [2023-08-30 21:13:28,060 INFO L231 Difference]: Finished difference. Result has 123 places, 96 transitions, 879 flow [2023-08-30 21:13:28,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=879, PETRI_PLACES=123, PETRI_TRANSITIONS=96} [2023-08-30 21:13:28,061 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2023-08-30 21:13:28,061 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 96 transitions, 879 flow [2023-08-30 21:13:28,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:28,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:28,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:28,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:28,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:28,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:28,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash 538396011, now seen corresponding path program 6 times [2023-08-30 21:13:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:28,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307805218] [2023-08-30 21:13:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:28,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:13:28,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307805218] [2023-08-30 21:13:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307805218] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168529559] [2023-08-30 21:13:28,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:13:28,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:28,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:28,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:28,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:13:28,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:13:28,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:28,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 21:13:28,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:13:28,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:13:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168529559] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:28,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:28,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-30 21:13:28,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260678609] [2023-08-30 21:13:28,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:28,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:13:28,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:28,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:13:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:13:28,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 145 [2023-08-30 21:13:28,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 96 transitions, 879 flow. Second operand has 7 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:28,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:28,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 145 [2023-08-30 21:13:28,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:28,546 INFO L130 PetriNetUnfolder]: 237/471 cut-off events. [2023-08-30 21:13:28,546 INFO L131 PetriNetUnfolder]: For 5720/5720 co-relation queries the response was YES. [2023-08-30 21:13:28,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 471 events. 237/471 cut-off events. For 5720/5720 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2059 event pairs, 30 based on Foata normal form. 20/486 useless extension candidates. Maximal degree in co-relation 2415. Up to 401 conditions per place. [2023-08-30 21:13:28,551 INFO L137 encePairwiseOnDemand]: 140/145 looper letters, 79 selfloop transitions, 17 changer transitions 2/101 dead transitions. [2023-08-30 21:13:28,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 101 transitions, 1050 flow [2023-08-30 21:13:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:13:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:13:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 417 transitions. [2023-08-30 21:13:28,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793103448275862 [2023-08-30 21:13:28,553 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 417 transitions. [2023-08-30 21:13:28,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 417 transitions. [2023-08-30 21:13:28,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:28,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 417 transitions. [2023-08-30 21:13:28,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.5) internal successors, (417), 6 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:28,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:28,555 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:28,555 INFO L175 Difference]: Start difference. First operand has 123 places, 96 transitions, 879 flow. Second operand 6 states and 417 transitions. [2023-08-30 21:13:28,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 101 transitions, 1050 flow [2023-08-30 21:13:28,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 101 transitions, 949 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-08-30 21:13:28,573 INFO L231 Difference]: Finished difference. Result has 112 places, 86 transitions, 724 flow [2023-08-30 21:13:28,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=112, PETRI_TRANSITIONS=86} [2023-08-30 21:13:28,574 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 92 predicate places. [2023-08-30 21:13:28,574 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 86 transitions, 724 flow [2023-08-30 21:13:28,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:28,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:28,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:28,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:28,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:28,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:28,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1447872089, now seen corresponding path program 7 times [2023-08-30 21:13:28,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:28,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192598329] [2023-08-30 21:13:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:28,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:28,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:28,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192598329] [2023-08-30 21:13:28,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192598329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:28,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248756339] [2023-08-30 21:13:28,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:13:28,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:28,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:28,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:13:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:29,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:13:29,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:29,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:29,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248756339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:29,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:29,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:13:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585133650] [2023-08-30 21:13:29,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:29,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:13:29,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:13:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:13:29,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:29,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 86 transitions, 724 flow. Second operand has 19 states, 19 states have (on average 59.8421052631579) internal successors, (1137), 19 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:29,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:29,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:29,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:30,444 INFO L130 PetriNetUnfolder]: 333/677 cut-off events. [2023-08-30 21:13:30,444 INFO L131 PetriNetUnfolder]: For 8509/8509 co-relation queries the response was YES. [2023-08-30 21:13:30,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3752 conditions, 677 events. 333/677 cut-off events. For 8509/8509 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3447 event pairs, 29 based on Foata normal form. 4/679 useless extension candidates. Maximal degree in co-relation 3559. Up to 272 conditions per place. [2023-08-30 21:13:30,450 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 105 selfloop transitions, 53 changer transitions 67/225 dead transitions. [2023-08-30 21:13:30,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 225 transitions, 2130 flow [2023-08-30 21:13:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:13:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:13:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2210 transitions. [2023-08-30 21:13:30,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354679802955665 [2023-08-30 21:13:30,454 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2210 transitions. [2023-08-30 21:13:30,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2210 transitions. [2023-08-30 21:13:30,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:30,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2210 transitions. [2023-08-30 21:13:30,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 63.142857142857146) internal successors, (2210), 35 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:30,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:30,465 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:30,465 INFO L175 Difference]: Start difference. First operand has 112 places, 86 transitions, 724 flow. Second operand 35 states and 2210 transitions. [2023-08-30 21:13:30,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 225 transitions, 2130 flow [2023-08-30 21:13:30,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 225 transitions, 2039 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-08-30 21:13:30,495 INFO L231 Difference]: Finished difference. Result has 151 places, 98 transitions, 1039 flow [2023-08-30 21:13:30,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1039, PETRI_PLACES=151, PETRI_TRANSITIONS=98} [2023-08-30 21:13:30,496 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2023-08-30 21:13:30,496 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 98 transitions, 1039 flow [2023-08-30 21:13:30,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.8421052631579) internal successors, (1137), 19 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:30,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:30,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:30,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:30,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:30,702 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:30,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1306012647, now seen corresponding path program 8 times [2023-08-30 21:13:30,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:30,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004834640] [2023-08-30 21:13:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:30,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:30,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:30,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004834640] [2023-08-30 21:13:30,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004834640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:30,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754887071] [2023-08-30 21:13:30,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:13:30,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:30,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:30,869 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:30,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:13:30,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:13:30,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:30,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:13:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:31,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:31,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754887071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:31,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:31,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:13:31,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31978306] [2023-08-30 21:13:31,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:31,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:13:31,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:31,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:13:31,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:13:31,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:31,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 98 transitions, 1039 flow. Second operand has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:31,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:31,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:31,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:32,159 INFO L130 PetriNetUnfolder]: 291/615 cut-off events. [2023-08-30 21:13:32,159 INFO L131 PetriNetUnfolder]: For 12380/12380 co-relation queries the response was YES. [2023-08-30 21:13:32,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4030 conditions, 615 events. 291/615 cut-off events. For 12380/12380 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3168 event pairs, 29 based on Foata normal form. 7/620 useless extension candidates. Maximal degree in co-relation 3930. Up to 267 conditions per place. [2023-08-30 21:13:32,164 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 113 selfloop transitions, 63 changer transitions 26/202 dead transitions. [2023-08-30 21:13:32,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 202 transitions, 2273 flow [2023-08-30 21:13:32,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 21:13:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 21:13:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1650 transitions. [2023-08-30 21:13:32,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376657824933687 [2023-08-30 21:13:32,167 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1650 transitions. [2023-08-30 21:13:32,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1650 transitions. [2023-08-30 21:13:32,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:32,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1650 transitions. [2023-08-30 21:13:32,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 63.46153846153846) internal successors, (1650), 26 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:32,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:32,176 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:32,176 INFO L175 Difference]: Start difference. First operand has 151 places, 98 transitions, 1039 flow. Second operand 26 states and 1650 transitions. [2023-08-30 21:13:32,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 202 transitions, 2273 flow [2023-08-30 21:13:32,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 202 transitions, 1605 flow, removed 250 selfloop flow, removed 37 redundant places. [2023-08-30 21:13:32,211 INFO L231 Difference]: Finished difference. Result has 137 places, 112 transitions, 1050 flow [2023-08-30 21:13:32,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1050, PETRI_PLACES=137, PETRI_TRANSITIONS=112} [2023-08-30 21:13:32,212 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-08-30 21:13:32,212 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 112 transitions, 1050 flow [2023-08-30 21:13:32,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:32,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:32,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:32,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:32,420 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,SelfDestructingSolverStorable9 [2023-08-30 21:13:32,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:32,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1376530827, now seen corresponding path program 9 times [2023-08-30 21:13:32,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:32,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24552556] [2023-08-30 21:13:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:32,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24552556] [2023-08-30 21:13:32,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24552556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:32,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575400829] [2023-08-30 21:13:32,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:13:32,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:32,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:32,617 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:32,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:13:32,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:13:32,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:32,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:13:32,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:32,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575400829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:32,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:32,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:13:32,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764785468] [2023-08-30 21:13:32,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:32,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:13:32,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:32,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:13:32,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:13:33,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:33,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 112 transitions, 1050 flow. Second operand has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:33,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:33,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:33,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:34,069 INFO L130 PetriNetUnfolder]: 271/538 cut-off events. [2023-08-30 21:13:34,070 INFO L131 PetriNetUnfolder]: For 6580/6580 co-relation queries the response was YES. [2023-08-30 21:13:34,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 538 events. 271/538 cut-off events. For 6580/6580 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2489 event pairs, 29 based on Foata normal form. 6/538 useless extension candidates. Maximal degree in co-relation 2920. Up to 267 conditions per place. [2023-08-30 21:13:34,074 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 91 selfloop transitions, 56 changer transitions 39/186 dead transitions. [2023-08-30 21:13:34,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 186 transitions, 1777 flow [2023-08-30 21:13:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 21:13:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 21:13:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1879 transitions. [2023-08-30 21:13:34,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43195402298850577 [2023-08-30 21:13:34,078 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1879 transitions. [2023-08-30 21:13:34,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1879 transitions. [2023-08-30 21:13:34,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:34,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1879 transitions. [2023-08-30 21:13:34,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 62.63333333333333) internal successors, (1879), 30 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:34,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:34,087 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:34,087 INFO L175 Difference]: Start difference. First operand has 137 places, 112 transitions, 1050 flow. Second operand 30 states and 1879 transitions. [2023-08-30 21:13:34,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 186 transitions, 1777 flow [2023-08-30 21:13:34,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 186 transitions, 1484 flow, removed 114 selfloop flow, removed 18 redundant places. [2023-08-30 21:13:34,114 INFO L231 Difference]: Finished difference. Result has 152 places, 107 transitions, 929 flow [2023-08-30 21:13:34,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=929, PETRI_PLACES=152, PETRI_TRANSITIONS=107} [2023-08-30 21:13:34,114 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 132 predicate places. [2023-08-30 21:13:34,115 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 107 transitions, 929 flow [2023-08-30 21:13:34,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:34,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:34,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:34,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:34,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:34,321 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:34,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:34,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480629, now seen corresponding path program 10 times [2023-08-30 21:13:34,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646787185] [2023-08-30 21:13:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:34,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:34,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646787185] [2023-08-30 21:13:34,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646787185] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:34,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473408014] [2023-08-30 21:13:34,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:13:34,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:34,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:34,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:34,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:13:34,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:13:34,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:13:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:34,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:34,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473408014] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:34,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:34,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:13:34,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557429899] [2023-08-30 21:13:34,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:34,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:13:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:13:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:13:34,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:34,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 107 transitions, 929 flow. Second operand has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:34,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:34,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:34,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:35,647 INFO L130 PetriNetUnfolder]: 252/497 cut-off events. [2023-08-30 21:13:35,648 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-08-30 21:13:35,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 497 events. 252/497 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2170 event pairs, 11 based on Foata normal form. 5/492 useless extension candidates. Maximal degree in co-relation 2536. Up to 270 conditions per place. [2023-08-30 21:13:35,653 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 121 selfloop transitions, 34 changer transitions 22/177 dead transitions. [2023-08-30 21:13:35,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 177 transitions, 1718 flow [2023-08-30 21:13:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 21:13:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 21:13:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1452 transitions. [2023-08-30 21:13:35,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353823088455772 [2023-08-30 21:13:35,657 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1452 transitions. [2023-08-30 21:13:35,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1452 transitions. [2023-08-30 21:13:35,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:35,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1452 transitions. [2023-08-30 21:13:35,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 63.130434782608695) internal successors, (1452), 23 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:35,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:35,663 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:35,663 INFO L175 Difference]: Start difference. First operand has 152 places, 107 transitions, 929 flow. Second operand 23 states and 1452 transitions. [2023-08-30 21:13:35,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 177 transitions, 1718 flow [2023-08-30 21:13:35,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 177 transitions, 1503 flow, removed 42 selfloop flow, removed 36 redundant places. [2023-08-30 21:13:35,681 INFO L231 Difference]: Finished difference. Result has 137 places, 107 transitions, 872 flow [2023-08-30 21:13:35,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=872, PETRI_PLACES=137, PETRI_TRANSITIONS=107} [2023-08-30 21:13:35,682 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-08-30 21:13:35,682 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 107 transitions, 872 flow [2023-08-30 21:13:35,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:35,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:35,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:35,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:35,888 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,SelfDestructingSolverStorable11 [2023-08-30 21:13:35,888 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:35,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1918495045, now seen corresponding path program 11 times [2023-08-30 21:13:35,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:35,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494248518] [2023-08-30 21:13:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:36,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:36,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494248518] [2023-08-30 21:13:36,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494248518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:36,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014201106] [2023-08-30 21:13:36,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:13:36,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:36,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:36,061 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:36,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:13:36,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:13:36,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:36,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 21:13:36,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:36,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:36,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014201106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:36,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:36,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 21:13:36,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286687547] [2023-08-30 21:13:36,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:36,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:13:36,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:13:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-08-30 21:13:36,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:36,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 107 transitions, 872 flow. Second operand has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:36,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:36,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:36,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:36,907 INFO L130 PetriNetUnfolder]: 224/434 cut-off events. [2023-08-30 21:13:36,907 INFO L131 PetriNetUnfolder]: For 3069/3069 co-relation queries the response was YES. [2023-08-30 21:13:36,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 434 events. 224/434 cut-off events. For 3069/3069 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1755 event pairs, 9 based on Foata normal form. 1/431 useless extension candidates. Maximal degree in co-relation 2144. Up to 362 conditions per place. [2023-08-30 21:13:36,910 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 98 selfloop transitions, 23 changer transitions 8/129 dead transitions. [2023-08-30 21:13:36,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 129 transitions, 1214 flow [2023-08-30 21:13:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 21:13:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 21:13:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 690 transitions. [2023-08-30 21:13:36,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43260188087774293 [2023-08-30 21:13:36,912 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 690 transitions. [2023-08-30 21:13:36,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 690 transitions. [2023-08-30 21:13:36,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:36,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 690 transitions. [2023-08-30 21:13:36,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 62.72727272727273) internal successors, (690), 11 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:36,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:36,915 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:36,915 INFO L175 Difference]: Start difference. First operand has 137 places, 107 transitions, 872 flow. Second operand 11 states and 690 transitions. [2023-08-30 21:13:36,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 129 transitions, 1214 flow [2023-08-30 21:13:36,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 129 transitions, 1116 flow, removed 18 selfloop flow, removed 20 redundant places. [2023-08-30 21:13:36,929 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 859 flow [2023-08-30 21:13:36,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=859, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2023-08-30 21:13:36,930 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-08-30 21:13:36,930 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 859 flow [2023-08-30 21:13:36,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:36,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:36,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:36,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:37,136 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,SelfDestructingSolverStorable12 [2023-08-30 21:13:37,136 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:37,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:37,136 INFO L85 PathProgramCache]: Analyzing trace with hash -762529050, now seen corresponding path program 12 times [2023-08-30 21:13:37,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:37,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300585430] [2023-08-30 21:13:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:37,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:37,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:37,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300585430] [2023-08-30 21:13:37,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300585430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:37,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511625903] [2023-08-30 21:13:37,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:13:37,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:37,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:37,308 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:37,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:13:37,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:13:37,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:13:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:37,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:37,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511625903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:37,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:37,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 21:13:37,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382076244] [2023-08-30 21:13:37,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:13:37,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:37,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:13:37,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:13:37,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:37,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 859 flow. Second operand has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:37,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:37,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:37,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:38,508 INFO L130 PetriNetUnfolder]: 277/546 cut-off events. [2023-08-30 21:13:38,508 INFO L131 PetriNetUnfolder]: For 3628/3628 co-relation queries the response was YES. [2023-08-30 21:13:38,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 546 events. 277/546 cut-off events. For 3628/3628 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2468 event pairs, 11 based on Foata normal form. 4/546 useless extension candidates. Maximal degree in co-relation 2651. Up to 302 conditions per place. [2023-08-30 21:13:38,513 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 71 changer transitions 28/189 dead transitions. [2023-08-30 21:13:38,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 189 transitions, 1716 flow [2023-08-30 21:13:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 21:13:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 21:13:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1509 transitions. [2023-08-30 21:13:38,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336206896551724 [2023-08-30 21:13:38,516 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1509 transitions. [2023-08-30 21:13:38,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1509 transitions. [2023-08-30 21:13:38,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:38,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1509 transitions. [2023-08-30 21:13:38,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 62.875) internal successors, (1509), 24 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:38,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:38,526 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:38,526 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 859 flow. Second operand 24 states and 1509 transitions. [2023-08-30 21:13:38,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 189 transitions, 1716 flow [2023-08-30 21:13:38,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1637 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-08-30 21:13:38,544 INFO L231 Difference]: Finished difference. Result has 145 places, 131 transitions, 1208 flow [2023-08-30 21:13:38,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1208, PETRI_PLACES=145, PETRI_TRANSITIONS=131} [2023-08-30 21:13:38,545 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2023-08-30 21:13:38,546 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 131 transitions, 1208 flow [2023-08-30 21:13:38,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:38,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:38,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:38,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:38,753 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,SelfDestructingSolverStorable13 [2023-08-30 21:13:38,753 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:38,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash -944601462, now seen corresponding path program 13 times [2023-08-30 21:13:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:38,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955531783] [2023-08-30 21:13:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:38,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:38,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:38,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955531783] [2023-08-30 21:13:38,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955531783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:38,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957463272] [2023-08-30 21:13:38,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:13:38,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:38,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:38,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:13:38,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 21:13:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:39,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:13:39,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:39,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:39,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957463272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:39,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:39,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 21:13:39,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410575447] [2023-08-30 21:13:39,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:39,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:13:39,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:39,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:13:39,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:13:39,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:39,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 131 transitions, 1208 flow. Second operand has 22 states, 22 states have (on average 59.72727272727273) internal successors, (1314), 22 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:39,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:39,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:39,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:40,002 INFO L130 PetriNetUnfolder]: 368/739 cut-off events. [2023-08-30 21:13:40,002 INFO L131 PetriNetUnfolder]: For 5772/5772 co-relation queries the response was YES. [2023-08-30 21:13:40,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4047 conditions, 739 events. 368/739 cut-off events. For 5772/5772 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3741 event pairs, 13 based on Foata normal form. 6/741 useless extension candidates. Maximal degree in co-relation 3945. Up to 205 conditions per place. [2023-08-30 21:13:40,007 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 109 selfloop transitions, 80 changer transitions 67/256 dead transitions. [2023-08-30 21:13:40,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 256 transitions, 2591 flow [2023-08-30 21:13:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 21:13:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 21:13:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1825 transitions. [2023-08-30 21:13:40,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340071343638526 [2023-08-30 21:13:40,010 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1825 transitions. [2023-08-30 21:13:40,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1825 transitions. [2023-08-30 21:13:40,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:40,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1825 transitions. [2023-08-30 21:13:40,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 62.93103448275862) internal successors, (1825), 29 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:40,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:40,017 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:40,017 INFO L175 Difference]: Start difference. First operand has 145 places, 131 transitions, 1208 flow. Second operand 29 states and 1825 transitions. [2023-08-30 21:13:40,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 256 transitions, 2591 flow [2023-08-30 21:13:40,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 256 transitions, 2349 flow, removed 79 selfloop flow, removed 12 redundant places. [2023-08-30 21:13:40,043 INFO L231 Difference]: Finished difference. Result has 173 places, 128 transitions, 1364 flow [2023-08-30 21:13:40,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1364, PETRI_PLACES=173, PETRI_TRANSITIONS=128} [2023-08-30 21:13:40,044 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-08-30 21:13:40,044 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 128 transitions, 1364 flow [2023-08-30 21:13:40,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.72727272727273) internal successors, (1314), 22 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:40,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:40,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:40,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:40,250 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,SelfDestructingSolverStorable14 [2023-08-30 21:13:40,250 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:40,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1875183464, now seen corresponding path program 14 times [2023-08-30 21:13:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:40,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964897949] [2023-08-30 21:13:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:40,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:40,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964897949] [2023-08-30 21:13:40,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964897949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:40,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003517000] [2023-08-30 21:13:40,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:13:40,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:40,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:40,437 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) [2023-08-30 21:13:40,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 21:13:40,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:13:40,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:40,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:13:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:40,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:40,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003517000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:40,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:40,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 21:13:40,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544693946] [2023-08-30 21:13:40,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:40,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:13:40,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:13:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:13:40,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:40,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 128 transitions, 1364 flow. Second operand has 23 states, 23 states have (on average 59.73913043478261) internal successors, (1374), 23 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:40,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:40,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:40,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:41,771 INFO L130 PetriNetUnfolder]: 402/798 cut-off events. [2023-08-30 21:13:41,772 INFO L131 PetriNetUnfolder]: For 10464/10464 co-relation queries the response was YES. [2023-08-30 21:13:41,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5262 conditions, 798 events. 402/798 cut-off events. For 10464/10464 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4068 event pairs, 13 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 5137. Up to 223 conditions per place. [2023-08-30 21:13:41,779 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 123 selfloop transitions, 96 changer transitions 32/251 dead transitions. [2023-08-30 21:13:41,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3165 flow [2023-08-30 21:13:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 21:13:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 21:13:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1957 transitions. [2023-08-30 21:13:41,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353726362625139 [2023-08-30 21:13:41,781 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1957 transitions. [2023-08-30 21:13:41,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1957 transitions. [2023-08-30 21:13:41,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:41,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1957 transitions. [2023-08-30 21:13:41,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 63.12903225806452) internal successors, (1957), 31 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:41,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:41,789 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:41,789 INFO L175 Difference]: Start difference. First operand has 173 places, 128 transitions, 1364 flow. Second operand 31 states and 1957 transitions. [2023-08-30 21:13:41,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3165 flow [2023-08-30 21:13:41,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 251 transitions, 2504 flow, removed 295 selfloop flow, removed 23 redundant places. [2023-08-30 21:13:41,819 INFO L231 Difference]: Finished difference. Result has 175 places, 152 transitions, 1761 flow [2023-08-30 21:13:41,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1761, PETRI_PLACES=175, PETRI_TRANSITIONS=152} [2023-08-30 21:13:41,820 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 155 predicate places. [2023-08-30 21:13:41,820 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 152 transitions, 1761 flow [2023-08-30 21:13:41,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.73913043478261) internal successors, (1374), 23 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:41,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:41,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:41,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:42,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:42,026 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:42,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:42,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1804665284, now seen corresponding path program 15 times [2023-08-30 21:13:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635447847] [2023-08-30 21:13:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:42,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:42,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635447847] [2023-08-30 21:13:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635447847] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560743042] [2023-08-30 21:13:42,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:13:42,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:42,197 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) [2023-08-30 21:13:42,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 21:13:42,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:13:42,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:42,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:13:42,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:42,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:42,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560743042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:42,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:42,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 21:13:42,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44847331] [2023-08-30 21:13:42,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:42,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:13:42,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:42,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:13:42,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:13:42,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:42,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 152 transitions, 1761 flow. Second operand has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:42,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:42,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:42,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:43,636 INFO L130 PetriNetUnfolder]: 371/747 cut-off events. [2023-08-30 21:13:43,636 INFO L131 PetriNetUnfolder]: For 9071/9071 co-relation queries the response was YES. [2023-08-30 21:13:43,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 747 events. 371/747 cut-off events. For 9071/9071 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3741 event pairs, 11 based on Foata normal form. 5/748 useless extension candidates. Maximal degree in co-relation 4675. Up to 221 conditions per place. [2023-08-30 21:13:43,646 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 120 selfloop transitions, 98 changer transitions 31/249 dead transitions. [2023-08-30 21:13:43,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 249 transitions, 2918 flow [2023-08-30 21:13:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 21:13:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 21:13:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1833 transitions. [2023-08-30 21:13:43,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359096313912009 [2023-08-30 21:13:43,649 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1833 transitions. [2023-08-30 21:13:43,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1833 transitions. [2023-08-30 21:13:43,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:43,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1833 transitions. [2023-08-30 21:13:43,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 63.206896551724135) internal successors, (1833), 29 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:43,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:43,656 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:43,656 INFO L175 Difference]: Start difference. First operand has 175 places, 152 transitions, 1761 flow. Second operand 29 states and 1833 transitions. [2023-08-30 21:13:43,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 249 transitions, 2918 flow [2023-08-30 21:13:43,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 249 transitions, 2458 flow, removed 177 selfloop flow, removed 18 redundant places. [2023-08-30 21:13:43,690 INFO L231 Difference]: Finished difference. Result has 190 places, 154 transitions, 1710 flow [2023-08-30 21:13:43,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1710, PETRI_PLACES=190, PETRI_TRANSITIONS=154} [2023-08-30 21:13:43,691 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-08-30 21:13:43,691 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 154 transitions, 1710 flow [2023-08-30 21:13:43,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:43,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:43,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:43,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:43,897 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,SelfDestructingSolverStorable16 [2023-08-30 21:13:43,897 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:43,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:43,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1268773024, now seen corresponding path program 16 times [2023-08-30 21:13:43,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:43,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966430137] [2023-08-30 21:13:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:43,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:44,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:44,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966430137] [2023-08-30 21:13:44,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966430137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:44,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578533248] [2023-08-30 21:13:44,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:13:44,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:44,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:44,057 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) [2023-08-30 21:13:44,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 21:13:44,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:13:44,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:44,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:13:44,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:44,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:44,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578533248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:44,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:44,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-30 21:13:44,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591077141] [2023-08-30 21:13:44,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:44,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:13:44,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:13:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-08-30 21:13:44,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:44,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 154 transitions, 1710 flow. Second operand has 21 states, 21 states have (on average 59.76190476190476) internal successors, (1255), 21 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:44,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:44,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:44,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:45,125 INFO L130 PetriNetUnfolder]: 394/790 cut-off events. [2023-08-30 21:13:45,125 INFO L131 PetriNetUnfolder]: For 10103/10103 co-relation queries the response was YES. [2023-08-30 21:13:45,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 790 events. 394/790 cut-off events. For 10103/10103 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3994 event pairs, 15 based on Foata normal form. 5/791 useless extension candidates. Maximal degree in co-relation 4945. Up to 511 conditions per place. [2023-08-30 21:13:45,146 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 157 selfloop transitions, 41 changer transitions 41/239 dead transitions. [2023-08-30 21:13:45,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 239 transitions, 2764 flow [2023-08-30 21:13:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 21:13:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 21:13:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1623 transitions. [2023-08-30 21:13:45,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43050397877984087 [2023-08-30 21:13:45,149 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1623 transitions. [2023-08-30 21:13:45,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1623 transitions. [2023-08-30 21:13:45,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:45,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1623 transitions. [2023-08-30 21:13:45,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 62.42307692307692) internal successors, (1623), 26 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:45,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:45,155 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:45,156 INFO L175 Difference]: Start difference. First operand has 190 places, 154 transitions, 1710 flow. Second operand 26 states and 1623 transitions. [2023-08-30 21:13:45,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 239 transitions, 2764 flow [2023-08-30 21:13:45,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 239 transitions, 2488 flow, removed 61 selfloop flow, removed 23 redundant places. [2023-08-30 21:13:45,191 INFO L231 Difference]: Finished difference. Result has 194 places, 157 transitions, 1684 flow [2023-08-30 21:13:45,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1684, PETRI_PLACES=194, PETRI_TRANSITIONS=157} [2023-08-30 21:13:45,191 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-08-30 21:13:45,191 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 157 transitions, 1684 flow [2023-08-30 21:13:45,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.76190476190476) internal successors, (1255), 21 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:45,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:45,192 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:45,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:45,397 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,SelfDestructingSolverStorable17 [2023-08-30 21:13:45,397 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:45,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1188036426, now seen corresponding path program 17 times [2023-08-30 21:13:45,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:45,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017354720] [2023-08-30 21:13:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:45,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:45,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:45,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017354720] [2023-08-30 21:13:45,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017354720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:45,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783594639] [2023-08-30 21:13:45,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:13:45,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:45,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:45,573 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) [2023-08-30 21:13:45,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 21:13:45,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:13:45,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:45,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:13:45,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:45,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:45,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783594639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:45,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:45,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 21:13:45,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851198649] [2023-08-30 21:13:45,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:45,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:13:45,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:13:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:13:46,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:46,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 157 transitions, 1684 flow. Second operand has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:46,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:46,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:46,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:46,799 INFO L130 PetriNetUnfolder]: 466/942 cut-off events. [2023-08-30 21:13:46,799 INFO L131 PetriNetUnfolder]: For 17504/17504 co-relation queries the response was YES. [2023-08-30 21:13:46,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 942 events. 466/942 cut-off events. For 17504/17504 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4987 event pairs, 19 based on Foata normal form. 7/945 useless extension candidates. Maximal degree in co-relation 6269. Up to 517 conditions per place. [2023-08-30 21:13:46,807 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 178 selfloop transitions, 57 changer transitions 32/267 dead transitions. [2023-08-30 21:13:46,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 267 transitions, 3232 flow [2023-08-30 21:13:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 21:13:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 21:13:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1698 transitions. [2023-08-30 21:13:46,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337164750957854 [2023-08-30 21:13:46,809 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1698 transitions. [2023-08-30 21:13:46,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1698 transitions. [2023-08-30 21:13:46,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:46,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1698 transitions. [2023-08-30 21:13:46,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 62.888888888888886) internal successors, (1698), 27 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:46,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:46,815 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:46,815 INFO L175 Difference]: Start difference. First operand has 194 places, 157 transitions, 1684 flow. Second operand 27 states and 1698 transitions. [2023-08-30 21:13:46,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 267 transitions, 3232 flow [2023-08-30 21:13:46,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 267 transitions, 2923 flow, removed 128 selfloop flow, removed 18 redundant places. [2023-08-30 21:13:46,857 INFO L231 Difference]: Finished difference. Result has 204 places, 174 transitions, 2008 flow [2023-08-30 21:13:46,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2008, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2023-08-30 21:13:46,858 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2023-08-30 21:13:46,858 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 2008 flow [2023-08-30 21:13:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:46,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:46,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:46,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:47,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:47,064 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:47,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:47,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2122586034, now seen corresponding path program 18 times [2023-08-30 21:13:47,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:47,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250577230] [2023-08-30 21:13:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:47,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:47,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:47,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250577230] [2023-08-30 21:13:47,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250577230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:47,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065886611] [2023-08-30 21:13:47,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:13:47,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:47,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:47,233 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) [2023-08-30 21:13:47,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 21:13:47,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:13:47,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:13:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:47,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:47,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065886611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:47,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:47,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 21:13:47,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122271094] [2023-08-30 21:13:47,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:47,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:13:47,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:13:47,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:13:47,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:47,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 2008 flow. Second operand has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:47,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:47,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:47,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:48,769 INFO L130 PetriNetUnfolder]: 556/1126 cut-off events. [2023-08-30 21:13:48,769 INFO L131 PetriNetUnfolder]: For 22866/22866 co-relation queries the response was YES. [2023-08-30 21:13:48,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1126 events. 556/1126 cut-off events. For 22866/22866 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6267 event pairs, 25 based on Foata normal form. 5/1127 useless extension candidates. Maximal degree in co-relation 7887. Up to 616 conditions per place. [2023-08-30 21:13:48,777 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 191 selfloop transitions, 68 changer transitions 39/298 dead transitions. [2023-08-30 21:13:48,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 298 transitions, 3805 flow [2023-08-30 21:13:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 21:13:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 21:13:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1711 transitions. [2023-08-30 21:13:48,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2023-08-30 21:13:48,787 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1711 transitions. [2023-08-30 21:13:48,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1711 transitions. [2023-08-30 21:13:48,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:48,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1711 transitions. [2023-08-30 21:13:48,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 63.370370370370374) internal successors, (1711), 27 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:48,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:48,794 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:48,794 INFO L175 Difference]: Start difference. First operand has 204 places, 174 transitions, 2008 flow. Second operand 27 states and 1711 transitions. [2023-08-30 21:13:48,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 298 transitions, 3805 flow [2023-08-30 21:13:48,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 298 transitions, 3518 flow, removed 121 selfloop flow, removed 16 redundant places. [2023-08-30 21:13:48,871 INFO L231 Difference]: Finished difference. Result has 222 places, 196 transitions, 2493 flow [2023-08-30 21:13:48,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2493, PETRI_PLACES=222, PETRI_TRANSITIONS=196} [2023-08-30 21:13:48,871 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2023-08-30 21:13:48,871 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 196 transitions, 2493 flow [2023-08-30 21:13:48,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:48,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:48,872 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:48,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:49,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:49,077 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:49,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash 56355927, now seen corresponding path program 19 times [2023-08-30 21:13:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727552091] [2023-08-30 21:13:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:49,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:49,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727552091] [2023-08-30 21:13:49,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727552091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:49,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964479563] [2023-08-30 21:13:49,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:13:49,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:49,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:49,261 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) [2023-08-30 21:13:49,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 21:13:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:49,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:13:49,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:49,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:49,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964479563] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:49,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:49,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 21:13:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561664810] [2023-08-30 21:13:49,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:49,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 21:13:49,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 21:13:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-08-30 21:13:49,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:49,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 196 transitions, 2493 flow. Second operand has 26 states, 26 states have (on average 59.57692307692308) internal successors, (1549), 26 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:49,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:49,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:49,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:51,039 INFO L130 PetriNetUnfolder]: 743/1452 cut-off events. [2023-08-30 21:13:51,040 INFO L131 PetriNetUnfolder]: For 36204/36204 co-relation queries the response was YES. [2023-08-30 21:13:51,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10999 conditions, 1452 events. 743/1452 cut-off events. For 36204/36204 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8361 event pairs, 37 based on Foata normal form. 8/1456 useless extension candidates. Maximal degree in co-relation 10923. Up to 581 conditions per place. [2023-08-30 21:13:51,054 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 189 selfloop transitions, 149 changer transitions 36/374 dead transitions. [2023-08-30 21:13:51,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 374 transitions, 4925 flow [2023-08-30 21:13:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 21:13:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 21:13:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2388 transitions. [2023-08-30 21:13:51,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43339382940108895 [2023-08-30 21:13:51,058 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2388 transitions. [2023-08-30 21:13:51,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2388 transitions. [2023-08-30 21:13:51,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:51,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2388 transitions. [2023-08-30 21:13:51,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 62.8421052631579) internal successors, (2388), 38 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:51,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:51,063 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:51,063 INFO L175 Difference]: Start difference. First operand has 222 places, 196 transitions, 2493 flow. Second operand 38 states and 2388 transitions. [2023-08-30 21:13:51,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 374 transitions, 4925 flow [2023-08-30 21:13:51,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 374 transitions, 4570 flow, removed 145 selfloop flow, removed 15 redundant places. [2023-08-30 21:13:51,178 INFO L231 Difference]: Finished difference. Result has 249 places, 247 transitions, 3451 flow [2023-08-30 21:13:51,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3451, PETRI_PLACES=249, PETRI_TRANSITIONS=247} [2023-08-30 21:13:51,178 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2023-08-30 21:13:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 247 transitions, 3451 flow [2023-08-30 21:13:51,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.57692307692308) internal successors, (1549), 26 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:51,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:51,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:51,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:51,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:51,379 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:51,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:51,380 INFO L85 PathProgramCache]: Analyzing trace with hash -376590837, now seen corresponding path program 20 times [2023-08-30 21:13:51,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:51,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586265607] [2023-08-30 21:13:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:51,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:51,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:51,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586265607] [2023-08-30 21:13:51,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586265607] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:51,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273748260] [2023-08-30 21:13:51,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:13:51,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:51,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:51,661 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) [2023-08-30 21:13:51,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 21:13:51,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:13:51,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:13:51,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:51,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:52,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273748260] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:52,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:52,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 21:13:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173694829] [2023-08-30 21:13:52,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:52,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 21:13:52,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 21:13:52,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-08-30 21:13:52,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:52,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 247 transitions, 3451 flow. Second operand has 24 states, 24 states have (on average 59.666666666666664) internal successors, (1432), 24 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:52,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:52,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:52,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:53,484 INFO L130 PetriNetUnfolder]: 1024/1951 cut-off events. [2023-08-30 21:13:53,484 INFO L131 PetriNetUnfolder]: For 66721/66721 co-relation queries the response was YES. [2023-08-30 21:13:53,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17262 conditions, 1951 events. 1024/1951 cut-off events. For 66721/66721 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11822 event pairs, 63 based on Foata normal form. 16/1963 useless extension candidates. Maximal degree in co-relation 17179. Up to 915 conditions per place. [2023-08-30 21:13:53,501 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 256 selfloop transitions, 118 changer transitions 89/463 dead transitions. [2023-08-30 21:13:53,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 463 transitions, 7305 flow [2023-08-30 21:13:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 21:13:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 21:13:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2870 transitions. [2023-08-30 21:13:53,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302848575712144 [2023-08-30 21:13:53,505 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2870 transitions. [2023-08-30 21:13:53,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2870 transitions. [2023-08-30 21:13:53,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:53,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2870 transitions. [2023-08-30 21:13:53,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 62.391304347826086) internal successors, (2870), 46 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:53,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:53,513 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:53,514 INFO L175 Difference]: Start difference. First operand has 249 places, 247 transitions, 3451 flow. Second operand 46 states and 2870 transitions. [2023-08-30 21:13:53,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 463 transitions, 7305 flow [2023-08-30 21:13:53,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 463 transitions, 6297 flow, removed 432 selfloop flow, removed 25 redundant places. [2023-08-30 21:13:53,749 INFO L231 Difference]: Finished difference. Result has 282 places, 270 transitions, 3999 flow [2023-08-30 21:13:53,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3999, PETRI_PLACES=282, PETRI_TRANSITIONS=270} [2023-08-30 21:13:53,750 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 262 predicate places. [2023-08-30 21:13:53,750 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 270 transitions, 3999 flow [2023-08-30 21:13:53,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.666666666666664) internal successors, (1432), 24 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:53,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:53,750 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:53,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:53,950 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,SelfDestructingSolverStorable21 [2023-08-30 21:13:53,951 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:53,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash -857253995, now seen corresponding path program 21 times [2023-08-30 21:13:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:53,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849744977] [2023-08-30 21:13:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:13:54,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:54,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849744977] [2023-08-30 21:13:54,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849744977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:54,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667298193] [2023-08-30 21:13:54,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:13:54,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:54,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:54,140 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) [2023-08-30 21:13:54,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 21:13:54,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:13:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:13:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:54,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:13:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667298193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:54,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:54,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 21 [2023-08-30 21:13:54,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227189885] [2023-08-30 21:13:54,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:54,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:13:54,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:13:54,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:13:54,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:54,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 270 transitions, 3999 flow. Second operand has 23 states, 23 states have (on average 59.82608695652174) internal successors, (1376), 23 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:54,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:54,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:54,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:56,281 INFO L130 PetriNetUnfolder]: 1208/2243 cut-off events. [2023-08-30 21:13:56,281 INFO L131 PetriNetUnfolder]: For 95392/95392 co-relation queries the response was YES. [2023-08-30 21:13:56,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21946 conditions, 2243 events. 1208/2243 cut-off events. For 95392/95392 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13533 event pairs, 83 based on Foata normal form. 8/2247 useless extension candidates. Maximal degree in co-relation 21847. Up to 1364 conditions per place. [2023-08-30 21:13:56,305 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 291 selfloop transitions, 162 changer transitions 32/485 dead transitions. [2023-08-30 21:13:56,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 485 transitions, 8434 flow [2023-08-30 21:13:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 21:13:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 21:13:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2806 transitions. [2023-08-30 21:13:56,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300383141762452 [2023-08-30 21:13:56,309 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2806 transitions. [2023-08-30 21:13:56,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2806 transitions. [2023-08-30 21:13:56,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:56,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2806 transitions. [2023-08-30 21:13:56,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.355555555555554) internal successors, (2806), 45 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:56,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:56,317 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:56,318 INFO L175 Difference]: Start difference. First operand has 282 places, 270 transitions, 3999 flow. Second operand 45 states and 2806 transitions. [2023-08-30 21:13:56,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 485 transitions, 8434 flow [2023-08-30 21:13:56,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 485 transitions, 7272 flow, removed 500 selfloop flow, removed 34 redundant places. [2023-08-30 21:13:56,644 INFO L231 Difference]: Finished difference. Result has 288 places, 353 transitions, 5741 flow [2023-08-30 21:13:56,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5741, PETRI_PLACES=288, PETRI_TRANSITIONS=353} [2023-08-30 21:13:56,645 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 268 predicate places. [2023-08-30 21:13:56,645 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 353 transitions, 5741 flow [2023-08-30 21:13:56,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.82608695652174) internal successors, (1376), 23 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:56,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:56,645 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:56,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 21:13:56,845 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,SelfDestructingSolverStorable22 [2023-08-30 21:13:56,845 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:56,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1236654659, now seen corresponding path program 22 times [2023-08-30 21:13:56,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:56,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101958807] [2023-08-30 21:13:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:56,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:13:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:57,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:13:57,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101958807] [2023-08-30 21:13:57,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101958807] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:13:57,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164753956] [2023-08-30 21:13:57,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:13:57,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:57,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:13:57,054 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) [2023-08-30 21:13:57,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 21:13:57,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:13:57,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:13:57,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:13:57,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:13:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:57,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:13:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:13:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164753956] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:13:57,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:13:57,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-30 21:13:57,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368358030] [2023-08-30 21:13:57,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:13:57,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 21:13:57,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:13:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 21:13:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-08-30 21:13:57,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:13:57,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 353 transitions, 5741 flow. Second operand has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:57,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:13:57,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:13:57,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:59,345 INFO L130 PetriNetUnfolder]: 1239/2321 cut-off events. [2023-08-30 21:13:59,346 INFO L131 PetriNetUnfolder]: For 105658/105658 co-relation queries the response was YES. [2023-08-30 21:13:59,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22555 conditions, 2321 events. 1239/2321 cut-off events. For 105658/105658 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14077 event pairs, 63 based on Foata normal form. 11/2328 useless extension candidates. Maximal degree in co-relation 22455. Up to 1049 conditions per place. [2023-08-30 21:13:59,369 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 309 selfloop transitions, 180 changer transitions 33/522 dead transitions. [2023-08-30 21:13:59,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 522 transitions, 9259 flow [2023-08-30 21:13:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 21:13:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 21:13:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2627 transitions. [2023-08-30 21:13:59,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43136288998357963 [2023-08-30 21:13:59,371 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2627 transitions. [2023-08-30 21:13:59,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2627 transitions. [2023-08-30 21:13:59,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:59,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2627 transitions. [2023-08-30 21:13:59,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 62.54761904761905) internal successors, (2627), 42 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:59,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:59,380 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:59,380 INFO L175 Difference]: Start difference. First operand has 288 places, 353 transitions, 5741 flow. Second operand 42 states and 2627 transitions. [2023-08-30 21:13:59,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 522 transitions, 9259 flow [2023-08-30 21:13:59,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 522 transitions, 7914 flow, removed 626 selfloop flow, removed 25 redundant places. [2023-08-30 21:13:59,728 INFO L231 Difference]: Finished difference. Result has 312 places, 363 transitions, 5781 flow [2023-08-30 21:13:59,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4930, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5781, PETRI_PLACES=312, PETRI_TRANSITIONS=363} [2023-08-30 21:13:59,729 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-08-30 21:13:59,729 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 363 transitions, 5781 flow [2023-08-30 21:13:59,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:13:59,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:13:59,730 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:13:59,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-30 21:13:59,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:13:59,930 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:13:59,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:13:59,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1224381777, now seen corresponding path program 23 times [2023-08-30 21:13:59,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:13:59,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235672930] [2023-08-30 21:13:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:13:59,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:13:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:00,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:00,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235672930] [2023-08-30 21:14:00,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235672930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:00,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128863810] [2023-08-30 21:14:00,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:14:00,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:00,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:00,161 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) [2023-08-30 21:14:00,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 21:14:00,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:14:00,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:00,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:14:00,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:00,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:00,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128863810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:00,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:00,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-30 21:14:00,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008276361] [2023-08-30 21:14:00,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:00,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 21:14:00,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:00,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 21:14:00,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-30 21:14:00,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:00,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 363 transitions, 5781 flow. Second operand has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:00,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:00,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:00,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:03,068 INFO L130 PetriNetUnfolder]: 1665/3168 cut-off events. [2023-08-30 21:14:03,068 INFO L131 PetriNetUnfolder]: For 159603/159603 co-relation queries the response was YES. [2023-08-30 21:14:03,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31816 conditions, 3168 events. 1665/3168 cut-off events. For 159603/159603 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21180 event pairs, 57 based on Foata normal form. 26/3190 useless extension candidates. Maximal degree in co-relation 31709. Up to 1694 conditions per place. [2023-08-30 21:14:03,102 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 409 selfloop transitions, 190 changer transitions 74/673 dead transitions. [2023-08-30 21:14:03,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 673 transitions, 11632 flow [2023-08-30 21:14:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-30 21:14:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-30 21:14:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3464 transitions. [2023-08-30 21:14:03,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343573667711599 [2023-08-30 21:14:03,108 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3464 transitions. [2023-08-30 21:14:03,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3464 transitions. [2023-08-30 21:14:03,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:03,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3464 transitions. [2023-08-30 21:14:03,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 62.981818181818184) internal successors, (3464), 55 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:03,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:03,119 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:03,119 INFO L175 Difference]: Start difference. First operand has 312 places, 363 transitions, 5781 flow. Second operand 55 states and 3464 transitions. [2023-08-30 21:14:03,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 673 transitions, 11632 flow [2023-08-30 21:14:03,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 673 transitions, 11103 flow, removed 156 selfloop flow, removed 30 redundant places. [2023-08-30 21:14:03,620 INFO L231 Difference]: Finished difference. Result has 340 places, 484 transitions, 8710 flow [2023-08-30 21:14:03,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=8710, PETRI_PLACES=340, PETRI_TRANSITIONS=484} [2023-08-30 21:14:03,621 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2023-08-30 21:14:03,621 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 484 transitions, 8710 flow [2023-08-30 21:14:03,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:03,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:03,621 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:03,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 21:14:03,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:03,822 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:03,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:03,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1590475332, now seen corresponding path program 24 times [2023-08-30 21:14:03,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:03,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375376834] [2023-08-30 21:14:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:03,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:04,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:04,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375376834] [2023-08-30 21:14:04,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375376834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:04,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498438085] [2023-08-30 21:14:04,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:14:04,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:04,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:04,056 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:04,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 21:14:04,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:14:04,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 21:14:04,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:04,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:04,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498438085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:04,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:04,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 21:14:04,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568861612] [2023-08-30 21:14:04,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:04,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:14:04,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:14:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:14:04,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:04,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 484 transitions, 8710 flow. Second operand has 28 states, 28 states have (on average 59.57142857142857) internal successors, (1668), 28 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:04,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:04,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:04,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:07,648 INFO L130 PetriNetUnfolder]: 2973/5695 cut-off events. [2023-08-30 21:14:07,649 INFO L131 PetriNetUnfolder]: For 363228/363228 co-relation queries the response was YES. [2023-08-30 21:14:07,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65947 conditions, 5695 events. 2973/5695 cut-off events. For 363228/363228 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43216 event pairs, 99 based on Foata normal form. 39/5730 useless extension candidates. Maximal degree in co-relation 65835. Up to 1775 conditions per place. [2023-08-30 21:14:07,718 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 476 selfloop transitions, 439 changer transitions 90/1005 dead transitions. [2023-08-30 21:14:07,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1005 transitions, 20173 flow [2023-08-30 21:14:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 21:14:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 21:14:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3353 transitions. [2023-08-30 21:14:07,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363044892648016 [2023-08-30 21:14:07,723 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3353 transitions. [2023-08-30 21:14:07,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3353 transitions. [2023-08-30 21:14:07,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:07,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3353 transitions. [2023-08-30 21:14:07,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 63.264150943396224) internal successors, (3353), 53 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:07,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:07,733 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:07,733 INFO L175 Difference]: Start difference. First operand has 340 places, 484 transitions, 8710 flow. Second operand 53 states and 3353 transitions. [2023-08-30 21:14:07,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1005 transitions, 20173 flow [2023-08-30 21:14:08,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1005 transitions, 17491 flow, removed 1243 selfloop flow, removed 31 redundant places. [2023-08-30 21:14:08,956 INFO L231 Difference]: Finished difference. Result has 371 places, 750 transitions, 13577 flow [2023-08-30 21:14:08,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=13577, PETRI_PLACES=371, PETRI_TRANSITIONS=750} [2023-08-30 21:14:08,957 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 351 predicate places. [2023-08-30 21:14:08,957 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 750 transitions, 13577 flow [2023-08-30 21:14:08,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 59.57142857142857) internal successors, (1668), 28 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:08,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:08,958 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:08,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 21:14:09,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 21:14:09,162 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:09,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:09,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1528243986, now seen corresponding path program 25 times [2023-08-30 21:14:09,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:09,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38235320] [2023-08-30 21:14:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:09,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:09,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38235320] [2023-08-30 21:14:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38235320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504210750] [2023-08-30 21:14:09,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:14:09,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:09,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:09,469 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:09,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 21:14:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:09,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 21:14:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:09,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:10,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504210750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:10,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:10,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 21:14:10,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466261402] [2023-08-30 21:14:10,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:10,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:14:10,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:10,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:14:10,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:14:10,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:10,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 750 transitions, 13577 flow. Second operand has 28 states, 28 states have (on average 59.642857142857146) internal successors, (1670), 28 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:10,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:10,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:10,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:13,237 INFO L130 PetriNetUnfolder]: 3346/6465 cut-off events. [2023-08-30 21:14:13,237 INFO L131 PetriNetUnfolder]: For 341006/341006 co-relation queries the response was YES. [2023-08-30 21:14:13,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73310 conditions, 6465 events. 3346/6465 cut-off events. For 341006/341006 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 50467 event pairs, 173 based on Foata normal form. 45/6506 useless extension candidates. Maximal degree in co-relation 73189. Up to 3403 conditions per place. [2023-08-30 21:14:13,313 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 567 selfloop transitions, 284 changer transitions 183/1034 dead transitions. [2023-08-30 21:14:13,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1034 transitions, 21725 flow [2023-08-30 21:14:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 21:14:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 21:14:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2804 transitions. [2023-08-30 21:14:13,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42973180076628353 [2023-08-30 21:14:13,317 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2804 transitions. [2023-08-30 21:14:13,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2804 transitions. [2023-08-30 21:14:13,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:13,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2804 transitions. [2023-08-30 21:14:13,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.31111111111111) internal successors, (2804), 45 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:13,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:13,326 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:13,326 INFO L175 Difference]: Start difference. First operand has 371 places, 750 transitions, 13577 flow. Second operand 45 states and 2804 transitions. [2023-08-30 21:14:13,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1034 transitions, 21725 flow [2023-08-30 21:14:15,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1034 transitions, 19051 flow, removed 1271 selfloop flow, removed 29 redundant places. [2023-08-30 21:14:15,096 INFO L231 Difference]: Finished difference. Result has 399 places, 763 transitions, 13433 flow [2023-08-30 21:14:15,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=11913, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13433, PETRI_PLACES=399, PETRI_TRANSITIONS=763} [2023-08-30 21:14:15,096 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-08-30 21:14:15,096 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 763 transitions, 13433 flow [2023-08-30 21:14:15,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 59.642857142857146) internal successors, (1670), 28 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:15,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:15,097 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:15,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 21:14:15,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 21:14:15,297 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:15,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash 834360269, now seen corresponding path program 26 times [2023-08-30 21:14:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:15,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886576320] [2023-08-30 21:14:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:15,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:15,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886576320] [2023-08-30 21:14:15,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886576320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:15,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875707327] [2023-08-30 21:14:15,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:14:15,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:15,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:15,505 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:15,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 21:14:15,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:14:15,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:15,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:14:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:15,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875707327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:16,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-30 21:14:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540078089] [2023-08-30 21:14:16,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 21:14:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 21:14:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-08-30 21:14:16,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:16,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 763 transitions, 13433 flow. Second operand has 30 states, 30 states have (on average 59.56666666666667) internal successors, (1787), 30 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:16,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:16,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:16,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:18,782 INFO L130 PetriNetUnfolder]: 2635/5302 cut-off events. [2023-08-30 21:14:18,782 INFO L131 PetriNetUnfolder]: For 177078/177078 co-relation queries the response was YES. [2023-08-30 21:14:18,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50188 conditions, 5302 events. 2635/5302 cut-off events. For 177078/177078 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41478 event pairs, 81 based on Foata normal form. 30/5328 useless extension candidates. Maximal degree in co-relation 50059. Up to 1415 conditions per place. [2023-08-30 21:14:18,844 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 416 selfloop transitions, 422 changer transitions 155/993 dead transitions. [2023-08-30 21:14:18,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 993 transitions, 19676 flow [2023-08-30 21:14:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 21:14:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 21:14:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2812 transitions. [2023-08-30 21:14:18,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43095785440613027 [2023-08-30 21:14:18,847 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2812 transitions. [2023-08-30 21:14:18,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2812 transitions. [2023-08-30 21:14:18,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:18,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2812 transitions. [2023-08-30 21:14:18,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.48888888888889) internal successors, (2812), 45 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:18,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:18,856 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:18,856 INFO L175 Difference]: Start difference. First operand has 399 places, 763 transitions, 13433 flow. Second operand 45 states and 2812 transitions. [2023-08-30 21:14:18,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 993 transitions, 19676 flow [2023-08-30 21:14:20,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 993 transitions, 18505 flow, removed 499 selfloop flow, removed 39 redundant places. [2023-08-30 21:14:20,037 INFO L231 Difference]: Finished difference. Result has 402 places, 749 transitions, 14038 flow [2023-08-30 21:14:20,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12630, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=14038, PETRI_PLACES=402, PETRI_TRANSITIONS=749} [2023-08-30 21:14:20,037 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 382 predicate places. [2023-08-30 21:14:20,037 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 749 transitions, 14038 flow [2023-08-30 21:14:20,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 59.56666666666667) internal successors, (1787), 30 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:20,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:20,038 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:20,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-30 21:14:20,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 21:14:20,243 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:20,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:20,243 INFO L85 PathProgramCache]: Analyzing trace with hash -25703553, now seen corresponding path program 27 times [2023-08-30 21:14:20,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:20,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16099167] [2023-08-30 21:14:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:20,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:20,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:20,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16099167] [2023-08-30 21:14:20,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16099167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:20,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328791561] [2023-08-30 21:14:20,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:14:20,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:20,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:20,456 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:20,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 21:14:20,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 21:14:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:14:20,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:20,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:21,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328791561] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:21,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:21,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-30 21:14:21,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654182404] [2023-08-30 21:14:21,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:21,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 21:14:21,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 21:14:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2023-08-30 21:14:21,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:21,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 749 transitions, 14038 flow. Second operand has 31 states, 31 states have (on average 59.516129032258064) internal successors, (1845), 31 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:21,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:21,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:21,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:23,735 INFO L130 PetriNetUnfolder]: 2416/4845 cut-off events. [2023-08-30 21:14:23,735 INFO L131 PetriNetUnfolder]: For 160642/160642 co-relation queries the response was YES. [2023-08-30 21:14:23,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45963 conditions, 4845 events. 2416/4845 cut-off events. For 160642/160642 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37225 event pairs, 83 based on Foata normal form. 28/4869 useless extension candidates. Maximal degree in co-relation 45835. Up to 1415 conditions per place. [2023-08-30 21:14:23,786 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 397 selfloop transitions, 429 changer transitions 52/878 dead transitions. [2023-08-30 21:14:23,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 878 transitions, 16975 flow [2023-08-30 21:14:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 21:14:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 21:14:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2745 transitions. [2023-08-30 21:14:23,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43025078369905956 [2023-08-30 21:14:23,789 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2745 transitions. [2023-08-30 21:14:23,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2745 transitions. [2023-08-30 21:14:23,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:23,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2745 transitions. [2023-08-30 21:14:23,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 62.38636363636363) internal successors, (2745), 44 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:23,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:23,797 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:23,797 INFO L175 Difference]: Start difference. First operand has 402 places, 749 transitions, 14038 flow. Second operand 44 states and 2745 transitions. [2023-08-30 21:14:23,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 878 transitions, 16975 flow [2023-08-30 21:14:25,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 878 transitions, 15765 flow, removed 492 selfloop flow, removed 38 redundant places. [2023-08-30 21:14:25,019 INFO L231 Difference]: Finished difference. Result has 399 places, 743 transitions, 13814 flow [2023-08-30 21:14:25,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12973, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13814, PETRI_PLACES=399, PETRI_TRANSITIONS=743} [2023-08-30 21:14:25,020 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-08-30 21:14:25,020 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 743 transitions, 13814 flow [2023-08-30 21:14:25,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.516129032258064) internal successors, (1845), 31 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:25,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:25,021 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:25,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 21:14:25,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 21:14:25,225 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:25,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:25,225 INFO L85 PathProgramCache]: Analyzing trace with hash 125395759, now seen corresponding path program 28 times [2023-08-30 21:14:25,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:25,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475632242] [2023-08-30 21:14:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:25,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:25,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475632242] [2023-08-30 21:14:25,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475632242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365154214] [2023-08-30 21:14:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:14:25,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:25,435 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:25,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 21:14:25,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:14:25,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:25,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:14:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:25,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:25,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365154214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:25,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:25,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-30 21:14:25,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337983505] [2023-08-30 21:14:25,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:25,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 21:14:25,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:25,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 21:14:25,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2023-08-30 21:14:26,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:26,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 743 transitions, 13814 flow. Second operand has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:26,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:26,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:26,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:29,364 INFO L130 PetriNetUnfolder]: 3625/6950 cut-off events. [2023-08-30 21:14:29,364 INFO L131 PetriNetUnfolder]: For 199928/199928 co-relation queries the response was YES. [2023-08-30 21:14:29,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67025 conditions, 6950 events. 3625/6950 cut-off events. For 199928/199928 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 53940 event pairs, 171 based on Foata normal form. 50/6996 useless extension candidates. Maximal degree in co-relation 66903. Up to 1805 conditions per place. [2023-08-30 21:14:29,445 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 364 selfloop transitions, 558 changer transitions 384/1306 dead transitions. [2023-08-30 21:14:29,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1306 transitions, 28646 flow [2023-08-30 21:14:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 21:14:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 21:14:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3240 transitions. [2023-08-30 21:14:29,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297082228116711 [2023-08-30 21:14:29,448 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3240 transitions. [2023-08-30 21:14:29,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3240 transitions. [2023-08-30 21:14:29,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:29,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3240 transitions. [2023-08-30 21:14:29,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 62.30769230769231) internal successors, (3240), 52 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:29,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:29,455 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:29,456 INFO L175 Difference]: Start difference. First operand has 399 places, 743 transitions, 13814 flow. Second operand 52 states and 3240 transitions. [2023-08-30 21:14:29,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1306 transitions, 28646 flow [2023-08-30 21:14:30,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1306 transitions, 26993 flow, removed 165 selfloop flow, removed 39 redundant places. [2023-08-30 21:14:30,931 INFO L231 Difference]: Finished difference. Result has 414 places, 812 transitions, 16633 flow [2023-08-30 21:14:30,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12766, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=16633, PETRI_PLACES=414, PETRI_TRANSITIONS=812} [2023-08-30 21:14:30,933 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-08-30 21:14:30,933 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 812 transitions, 16633 flow [2023-08-30 21:14:30,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:30,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:30,934 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:30,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 21:14:31,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:31,138 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:31,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1213169703, now seen corresponding path program 29 times [2023-08-30 21:14:31,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:31,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629551927] [2023-08-30 21:14:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:31,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:31,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629551927] [2023-08-30 21:14:31,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629551927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:31,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158561636] [2023-08-30 21:14:31,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:14:31,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:31,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:31,406 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:31,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 21:14:31,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:14:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:14:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:31,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:31,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158561636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:31,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:31,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-30 21:14:31,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80252107] [2023-08-30 21:14:31,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:31,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 21:14:31,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:31,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 21:14:31,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-08-30 21:14:32,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:32,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 812 transitions, 16633 flow. Second operand has 30 states, 30 states have (on average 59.53333333333333) internal successors, (1786), 30 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:32,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:32,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:32,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:35,062 INFO L130 PetriNetUnfolder]: 2999/5935 cut-off events. [2023-08-30 21:14:35,062 INFO L131 PetriNetUnfolder]: For 160320/160320 co-relation queries the response was YES. [2023-08-30 21:14:35,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56225 conditions, 5935 events. 2999/5935 cut-off events. For 160320/160320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45872 event pairs, 151 based on Foata normal form. 29/5960 useless extension candidates. Maximal degree in co-relation 56103. Up to 3402 conditions per place. [2023-08-30 21:14:35,130 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 719 selfloop transitions, 234 changer transitions 149/1102 dead transitions. [2023-08-30 21:14:35,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1102 transitions, 22714 flow [2023-08-30 21:14:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 21:14:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 21:14:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2868 transitions. [2023-08-30 21:14:35,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42998500749625185 [2023-08-30 21:14:35,132 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2868 transitions. [2023-08-30 21:14:35,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2868 transitions. [2023-08-30 21:14:35,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:35,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2868 transitions. [2023-08-30 21:14:35,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 62.34782608695652) internal successors, (2868), 46 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:35,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:35,141 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:35,141 INFO L175 Difference]: Start difference. First operand has 414 places, 812 transitions, 16633 flow. Second operand 46 states and 2868 transitions. [2023-08-30 21:14:35,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1102 transitions, 22714 flow [2023-08-30 21:14:36,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1102 transitions, 20479 flow, removed 858 selfloop flow, removed 47 redundant places. [2023-08-30 21:14:36,774 INFO L231 Difference]: Finished difference. Result has 403 places, 873 transitions, 16702 flow [2023-08-30 21:14:36,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=14940, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16702, PETRI_PLACES=403, PETRI_TRANSITIONS=873} [2023-08-30 21:14:36,775 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-08-30 21:14:36,775 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 873 transitions, 16702 flow [2023-08-30 21:14:36,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 59.53333333333333) internal successors, (1786), 30 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:36,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:36,776 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:36,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 21:14:36,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:36,980 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:36,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:36,981 INFO L85 PathProgramCache]: Analyzing trace with hash -808262398, now seen corresponding path program 30 times [2023-08-30 21:14:36,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:36,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203924634] [2023-08-30 21:14:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:36,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:14:37,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:37,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203924634] [2023-08-30 21:14:37,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203924634] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:37,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424536073] [2023-08-30 21:14:37,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:14:37,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:37,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:37,227 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:37,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 21:14:37,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 21:14:37,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 21:14:37,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:37,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:14:37,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424536073] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:37,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:37,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2023-08-30 21:14:37,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409751805] [2023-08-30 21:14:37,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:37,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 21:14:37,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 21:14:37,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-08-30 21:14:38,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:38,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 873 transitions, 16702 flow. Second operand has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:38,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:38,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:38,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:40,693 INFO L130 PetriNetUnfolder]: 2565/5240 cut-off events. [2023-08-30 21:14:40,694 INFO L131 PetriNetUnfolder]: For 111733/111733 co-relation queries the response was YES. [2023-08-30 21:14:40,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46269 conditions, 5240 events. 2565/5240 cut-off events. For 111733/111733 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40939 event pairs, 77 based on Foata normal form. 64/5300 useless extension candidates. Maximal degree in co-relation 46155. Up to 1509 conditions per place. [2023-08-30 21:14:40,751 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 457 selfloop transitions, 512 changer transitions 72/1041 dead transitions. [2023-08-30 21:14:40,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1041 transitions, 21050 flow [2023-08-30 21:14:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 21:14:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 21:14:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3034 transitions. [2023-08-30 21:14:40,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42702322308233637 [2023-08-30 21:14:40,754 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3034 transitions. [2023-08-30 21:14:40,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3034 transitions. [2023-08-30 21:14:40,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:40,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3034 transitions. [2023-08-30 21:14:40,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 61.91836734693877) internal successors, (3034), 49 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:40,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:40,765 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:40,765 INFO L175 Difference]: Start difference. First operand has 403 places, 873 transitions, 16702 flow. Second operand 49 states and 3034 transitions. [2023-08-30 21:14:40,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1041 transitions, 21050 flow [2023-08-30 21:14:41,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1041 transitions, 20410 flow, removed 268 selfloop flow, removed 32 redundant places. [2023-08-30 21:14:41,735 INFO L231 Difference]: Finished difference. Result has 412 places, 891 transitions, 18343 flow [2023-08-30 21:14:41,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=16130, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18343, PETRI_PLACES=412, PETRI_TRANSITIONS=891} [2023-08-30 21:14:41,736 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-08-30 21:14:41,736 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 891 transitions, 18343 flow [2023-08-30 21:14:41,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:41,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:41,736 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:41,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-30 21:14:41,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 21:14:41,937 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:41,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1662152656, now seen corresponding path program 31 times [2023-08-30 21:14:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:41,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923135852] [2023-08-30 21:14:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:41,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:14:42,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:42,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923135852] [2023-08-30 21:14:42,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923135852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:42,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896295464] [2023-08-30 21:14:42,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:14:42,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:42,181 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:42,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 21:14:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 21:14:42,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:42,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:42,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896295464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:42,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:42,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 29 [2023-08-30 21:14:42,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759203168] [2023-08-30 21:14:42,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:42,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 21:14:42,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 21:14:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2023-08-30 21:14:42,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:42,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 891 transitions, 18343 flow. Second operand has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:42,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:42,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:42,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:45,497 INFO L130 PetriNetUnfolder]: 2335/4642 cut-off events. [2023-08-30 21:14:45,497 INFO L131 PetriNetUnfolder]: For 85783/85783 co-relation queries the response was YES. [2023-08-30 21:14:45,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41724 conditions, 4642 events. 2335/4642 cut-off events. For 85783/85783 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34274 event pairs, 3 based on Foata normal form. 30/4668 useless extension candidates. Maximal degree in co-relation 41612. Up to 2668 conditions per place. [2023-08-30 21:14:45,546 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 752 selfloop transitions, 259 changer transitions 50/1061 dead transitions. [2023-08-30 21:14:45,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1061 transitions, 22180 flow [2023-08-30 21:14:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 21:14:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 21:14:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2376 transitions. [2023-08-30 21:14:45,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43121597096188746 [2023-08-30 21:14:45,549 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2376 transitions. [2023-08-30 21:14:45,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2376 transitions. [2023-08-30 21:14:45,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:45,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2376 transitions. [2023-08-30 21:14:45,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 62.526315789473685) internal successors, (2376), 38 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:45,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:45,553 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:45,553 INFO L175 Difference]: Start difference. First operand has 412 places, 891 transitions, 18343 flow. Second operand 38 states and 2376 transitions. [2023-08-30 21:14:45,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1061 transitions, 22180 flow [2023-08-30 21:14:46,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1061 transitions, 21212 flow, removed 235 selfloop flow, removed 43 redundant places. [2023-08-30 21:14:46,323 INFO L231 Difference]: Finished difference. Result has 413 places, 941 transitions, 19037 flow [2023-08-30 21:14:46,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=17393, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=19037, PETRI_PLACES=413, PETRI_TRANSITIONS=941} [2023-08-30 21:14:46,325 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 393 predicate places. [2023-08-30 21:14:46,325 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 941 transitions, 19037 flow [2023-08-30 21:14:46,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:46,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:46,325 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:46,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 21:14:46,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:46,530 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:46,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:46,530 INFO L85 PathProgramCache]: Analyzing trace with hash 543377190, now seen corresponding path program 32 times [2023-08-30 21:14:46,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:46,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403798818] [2023-08-30 21:14:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:46,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:46,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:46,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403798818] [2023-08-30 21:14:46,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403798818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:46,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127454230] [2023-08-30 21:14:46,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:14:46,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:46,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:46,765 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:46,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 21:14:46,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:14:46,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:46,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 21:14:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:47,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:47,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127454230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:47,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:47,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-08-30 21:14:47,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815078277] [2023-08-30 21:14:47,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:47,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 21:14:47,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 21:14:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-08-30 21:14:47,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:47,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 941 transitions, 19037 flow. Second operand has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:47,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:47,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:47,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:51,292 INFO L130 PetriNetUnfolder]: 3109/6832 cut-off events. [2023-08-30 21:14:51,292 INFO L131 PetriNetUnfolder]: For 113362/113362 co-relation queries the response was YES. [2023-08-30 21:14:51,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55455 conditions, 6832 events. 3109/6832 cut-off events. For 113362/113362 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59404 event pairs, 7 based on Foata normal form. 84/6912 useless extension candidates. Maximal degree in co-relation 55335. Up to 2818 conditions per place. [2023-08-30 21:14:51,370 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 931 selfloop transitions, 302 changer transitions 474/1707 dead transitions. [2023-08-30 21:14:51,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1707 transitions, 32940 flow [2023-08-30 21:14:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 21:14:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 21:14:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4078 transitions. [2023-08-30 21:14:51,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326790450928382 [2023-08-30 21:14:51,373 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4078 transitions. [2023-08-30 21:14:51,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4078 transitions. [2023-08-30 21:14:51,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:51,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4078 transitions. [2023-08-30 21:14:51,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 62.738461538461536) internal successors, (4078), 65 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:51,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:51,380 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:51,380 INFO L175 Difference]: Start difference. First operand has 413 places, 941 transitions, 19037 flow. Second operand 65 states and 4078 transitions. [2023-08-30 21:14:51,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1707 transitions, 32940 flow [2023-08-30 21:14:52,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1707 transitions, 32635 flow, removed 83 selfloop flow, removed 23 redundant places. [2023-08-30 21:14:52,398 INFO L231 Difference]: Finished difference. Result has 477 places, 1043 transitions, 21861 flow [2023-08-30 21:14:52,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=18882, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=21861, PETRI_PLACES=477, PETRI_TRANSITIONS=1043} [2023-08-30 21:14:52,399 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 457 predicate places. [2023-08-30 21:14:52,399 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1043 transitions, 21861 flow [2023-08-30 21:14:52,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:52,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:52,400 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:52,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 21:14:52,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:52,605 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:52,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1301031468, now seen corresponding path program 33 times [2023-08-30 21:14:52,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:52,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039505449] [2023-08-30 21:14:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:52,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:52,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:52,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039505449] [2023-08-30 21:14:52,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039505449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:52,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808361746] [2023-08-30 21:14:52,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:14:52,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:52,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:52,829 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:52,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 21:14:52,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 21:14:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:52,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 21:14:52,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:53,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:53,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808361746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:53,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:53,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-30 21:14:53,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692272816] [2023-08-30 21:14:53,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:53,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 21:14:53,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:53,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 21:14:53,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 21:14:53,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:14:53,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1043 transitions, 21861 flow. Second operand has 33 states, 33 states have (on average 59.484848484848484) internal successors, (1963), 33 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) [2023-08-30 21:14:53,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:53,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:14:53,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:14:57,172 INFO L130 PetriNetUnfolder]: 3094/6954 cut-off events. [2023-08-30 21:14:57,172 INFO L131 PetriNetUnfolder]: For 162610/162610 co-relation queries the response was YES. [2023-08-30 21:14:57,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61972 conditions, 6954 events. 3094/6954 cut-off events. For 162610/162610 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 61590 event pairs, 3 based on Foata normal form. 137/7087 useless extension candidates. Maximal degree in co-relation 61831. Up to 2668 conditions per place. [2023-08-30 21:14:57,257 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 724 selfloop transitions, 492 changer transitions 144/1360 dead transitions. [2023-08-30 21:14:57,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1360 transitions, 30216 flow [2023-08-30 21:14:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:14:57,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:14:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2191 transitions. [2023-08-30 21:14:57,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317241379310345 [2023-08-30 21:14:57,259 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2191 transitions. [2023-08-30 21:14:57,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2191 transitions. [2023-08-30 21:14:57,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:14:57,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2191 transitions. [2023-08-30 21:14:57,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 62.6) internal successors, (2191), 35 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:57,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:57,264 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:14:57,264 INFO L175 Difference]: Start difference. First operand has 477 places, 1043 transitions, 21861 flow. Second operand 35 states and 2191 transitions. [2023-08-30 21:14:57,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1360 transitions, 30216 flow [2023-08-30 21:14:59,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1360 transitions, 26633 flow, removed 1403 selfloop flow, removed 48 redundant places. [2023-08-30 21:14:59,419 INFO L231 Difference]: Finished difference. Result has 445 places, 1163 transitions, 23234 flow [2023-08-30 21:14:59,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=19952, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=23234, PETRI_PLACES=445, PETRI_TRANSITIONS=1163} [2023-08-30 21:14:59,419 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 425 predicate places. [2023-08-30 21:14:59,420 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1163 transitions, 23234 flow [2023-08-30 21:14:59,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 59.484848484848484) internal successors, (1963), 33 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) [2023-08-30 21:14:59,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:59,420 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:59,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-30 21:14:59,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 21:14:59,621 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:14:59,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash -34981713, now seen corresponding path program 34 times [2023-08-30 21:14:59,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:59,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893642012] [2023-08-30 21:14:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:59,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:14:59,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:59,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893642012] [2023-08-30 21:14:59,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893642012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:59,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893469361] [2023-08-30 21:14:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:14:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:59,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:59,856 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:14:59,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 21:14:59,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:14:59,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:59,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:14:59,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:00,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:00,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893469361] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:00,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:00,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2023-08-30 21:15:00,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096553669] [2023-08-30 21:15:00,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:00,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 21:15:00,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 21:15:00,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 21:15:00,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:15:00,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1163 transitions, 23234 flow. Second operand has 33 states, 33 states have (on average 59.57575757575758) internal successors, (1966), 33 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:00,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:00,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:15:00,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:02,951 INFO L130 PetriNetUnfolder]: 2730/5071 cut-off events. [2023-08-30 21:15:02,951 INFO L131 PetriNetUnfolder]: For 64336/64336 co-relation queries the response was YES. [2023-08-30 21:15:02,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45809 conditions, 5071 events. 2730/5071 cut-off events. For 64336/64336 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34760 event pairs, 3 based on Foata normal form. 12/5079 useless extension candidates. Maximal degree in co-relation 45687. Up to 2030 conditions per place. [2023-08-30 21:15:03,018 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 662 selfloop transitions, 572 changer transitions 83/1317 dead transitions. [2023-08-30 21:15:03,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1317 transitions, 27831 flow [2023-08-30 21:15:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 21:15:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 21:15:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2434 transitions. [2023-08-30 21:15:03,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304155614500442 [2023-08-30 21:15:03,021 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2434 transitions. [2023-08-30 21:15:03,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2434 transitions. [2023-08-30 21:15:03,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:03,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2434 transitions. [2023-08-30 21:15:03,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 62.41025641025641) internal successors, (2434), 39 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:03,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:03,027 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:03,027 INFO L175 Difference]: Start difference. First operand has 445 places, 1163 transitions, 23234 flow. Second operand 39 states and 2434 transitions. [2023-08-30 21:15:03,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1317 transitions, 27831 flow [2023-08-30 21:15:03,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1317 transitions, 26548 flow, removed 505 selfloop flow, removed 26 redundant places. [2023-08-30 21:15:03,959 INFO L231 Difference]: Finished difference. Result has 451 places, 1176 transitions, 24146 flow [2023-08-30 21:15:03,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=22013, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24146, PETRI_PLACES=451, PETRI_TRANSITIONS=1176} [2023-08-30 21:15:03,960 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 431 predicate places. [2023-08-30 21:15:03,960 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1176 transitions, 24146 flow [2023-08-30 21:15:03,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 59.57575757575758) internal successors, (1966), 33 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:03,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:03,961 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:03,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:04,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 21:15:04,161 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:04,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:04,162 INFO L85 PathProgramCache]: Analyzing trace with hash -801870177, now seen corresponding path program 35 times [2023-08-30 21:15:04,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:04,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404611503] [2023-08-30 21:15:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:15:04,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:04,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404611503] [2023-08-30 21:15:04,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404611503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:04,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076986823] [2023-08-30 21:15:04,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:15:04,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:04,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:04,417 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:04,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 21:15:04,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 21:15:04,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:15:04,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:04,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:05,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076986823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:05,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:05,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2023-08-30 21:15:05,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131613799] [2023-08-30 21:15:05,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:05,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 21:15:05,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 21:15:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 21:15:05,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:15:05,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1176 transitions, 24146 flow. Second operand has 34 states, 34 states have (on average 59.529411764705884) internal successors, (2024), 34 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:05,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:05,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:15:05,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:07,750 INFO L130 PetriNetUnfolder]: 2657/4893 cut-off events. [2023-08-30 21:15:07,750 INFO L131 PetriNetUnfolder]: For 58703/58703 co-relation queries the response was YES. [2023-08-30 21:15:07,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44050 conditions, 4893 events. 2657/4893 cut-off events. For 58703/58703 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33134 event pairs, 3 based on Foata normal form. 9/4898 useless extension candidates. Maximal degree in co-relation 43931. Up to 2030 conditions per place. [2023-08-30 21:15:07,800 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 523 selfloop transitions, 36 changer transitions 717/1276 dead transitions. [2023-08-30 21:15:07,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1276 transitions, 27396 flow [2023-08-30 21:15:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 21:15:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 21:15:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2546 transitions. [2023-08-30 21:15:07,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42825904121110175 [2023-08-30 21:15:07,802 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2546 transitions. [2023-08-30 21:15:07,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2546 transitions. [2023-08-30 21:15:07,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:07,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2546 transitions. [2023-08-30 21:15:07,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 62.09756097560975) internal successors, (2546), 41 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:07,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:07,807 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:07,807 INFO L175 Difference]: Start difference. First operand has 451 places, 1176 transitions, 24146 flow. Second operand 41 states and 2546 transitions. [2023-08-30 21:15:07,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1276 transitions, 27396 flow [2023-08-30 21:15:08,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1276 transitions, 26889 flow, removed 177 selfloop flow, removed 29 redundant places. [2023-08-30 21:15:08,563 INFO L231 Difference]: Finished difference. Result has 456 places, 548 transitions, 8216 flow [2023-08-30 21:15:08,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=23747, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8216, PETRI_PLACES=456, PETRI_TRANSITIONS=548} [2023-08-30 21:15:08,564 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 436 predicate places. [2023-08-30 21:15:08,564 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 548 transitions, 8216 flow [2023-08-30 21:15:08,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 59.529411764705884) internal successors, (2024), 34 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:08,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:15:08,565 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:15:08,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:08,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 21:15:08,770 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:15:08,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:15:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1643464096, now seen corresponding path program 36 times [2023-08-30 21:15:08,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:15:08,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823672468] [2023-08-30 21:15:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:15:08,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:15:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:15:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:09,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:15:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823672468] [2023-08-30 21:15:09,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823672468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:15:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578215264] [2023-08-30 21:15:09,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:15:09,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:09,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:15:09,051 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:15:09,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 21:15:09,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 21:15:09,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:15:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 21:15:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:15:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:15:09,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:15:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:15:09,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578215264] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:15:09,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:15:09,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 40 [2023-08-30 21:15:09,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025942871] [2023-08-30 21:15:09,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:15:09,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 21:15:09,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:15:09,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 21:15:09,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 21:15:10,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-30 21:15:10,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 548 transitions, 8216 flow. Second operand has 42 states, 42 states have (on average 59.42857142857143) internal successors, (2496), 42 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:10,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:15:10,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-30 21:15:10,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:15:11,901 INFO L130 PetriNetUnfolder]: 1693/3215 cut-off events. [2023-08-30 21:15:11,901 INFO L131 PetriNetUnfolder]: For 10432/10432 co-relation queries the response was YES. [2023-08-30 21:15:11,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21453 conditions, 3215 events. 1693/3215 cut-off events. For 10432/10432 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20402 event pairs, 0 based on Foata normal form. 17/3230 useless extension candidates. Maximal degree in co-relation 21339. Up to 985 conditions per place. [2023-08-30 21:15:11,933 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 0 selfloop transitions, 0 changer transitions 905/905 dead transitions. [2023-08-30 21:15:11,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 905 transitions, 14323 flow [2023-08-30 21:15:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 21:15:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 21:15:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3138 transitions. [2023-08-30 21:15:11,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243407707910751 [2023-08-30 21:15:11,935 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3138 transitions. [2023-08-30 21:15:11,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3138 transitions. [2023-08-30 21:15:11,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:15:11,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3138 transitions. [2023-08-30 21:15:11,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 61.529411764705884) internal successors, (3138), 51 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:11,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:11,941 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:11,941 INFO L175 Difference]: Start difference. First operand has 456 places, 548 transitions, 8216 flow. Second operand 51 states and 3138 transitions. [2023-08-30 21:15:11,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 905 transitions, 14323 flow [2023-08-30 21:15:12,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 905 transitions, 13429 flow, removed 258 selfloop flow, removed 42 redundant places. [2023-08-30 21:15:12,144 INFO L231 Difference]: Finished difference. Result has 276 places, 0 transitions, 0 flow [2023-08-30 21:15:12,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=0, PETRI_PLACES=276, PETRI_TRANSITIONS=0} [2023-08-30 21:15:12,144 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-08-30 21:15:12,144 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 0 transitions, 0 flow [2023-08-30 21:15:12,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 59.42857142857143) internal successors, (2496), 42 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:15:12,147 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 21:15:12,147 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-30 21:15:12,147 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-30 21:15:12,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 21:15:12,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:15:12,349 INFO L445 BasicCegarLoop]: Path program histogram: [36, 1, 1] [2023-08-30 21:15:12,351 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 21:15:12,351 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 21:15:12,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 09:15:12 BasicIcfg [2023-08-30 21:15:12,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 21:15:12,354 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 21:15:12,354 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 21:15:12,354 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 21:15:12,354 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:13:15" (3/4) ... [2023-08-30 21:15:12,356 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 21:15:12,360 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 21:15:12,360 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 21:15:12,362 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-30 21:15:12,363 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 21:15:12,363 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 21:15:12,363 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 21:15:12,387 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 21:15:12,387 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 21:15:12,388 INFO L158 Benchmark]: Toolchain (without parser) took 117253.01ms. Allocated memory was 67.1MB in the beginning and 2.9GB in the end (delta: 2.8GB). Free memory was 31.8MB in the beginning and 2.2GB in the end (delta: -2.2GB). Peak memory consumption was 649.4MB. Max. memory is 16.1GB. [2023-08-30 21:15:12,388 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory is still 44.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 21:15:12,388 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.48ms. Allocated memory is still 67.1MB. Free memory was 31.6MB in the beginning and 40.9MB in the end (delta: -9.2MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2023-08-30 21:15:12,388 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.52ms. Allocated memory is still 67.1MB. Free memory was 40.9MB in the beginning and 39.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 21:15:12,389 INFO L158 Benchmark]: Boogie Preprocessor took 40.91ms. Allocated memory is still 67.1MB. Free memory was 39.2MB in the beginning and 38.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 21:15:12,389 INFO L158 Benchmark]: RCFGBuilder took 444.10ms. Allocated memory was 67.1MB in the beginning and 107.0MB in the end (delta: 39.8MB). Free memory was 38.0MB in the beginning and 80.5MB in the end (delta: -42.5MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2023-08-30 21:15:12,389 INFO L158 Benchmark]: TraceAbstraction took 116455.96ms. Allocated memory was 107.0MB in the beginning and 2.9GB in the end (delta: 2.8GB). Free memory was 80.1MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. [2023-08-30 21:15:12,390 INFO L158 Benchmark]: Witness Printer took 33.89ms. Allocated memory is still 2.9GB. Free memory was 2.2GB in the beginning and 2.2GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 21:15:12,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory is still 44.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.48ms. Allocated memory is still 67.1MB. Free memory was 31.6MB in the beginning and 40.9MB in the end (delta: -9.2MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.52ms. Allocated memory is still 67.1MB. Free memory was 40.9MB in the beginning and 39.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.91ms. Allocated memory is still 67.1MB. Free memory was 39.2MB in the beginning and 38.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 444.10ms. Allocated memory was 67.1MB in the beginning and 107.0MB in the end (delta: 39.8MB). Free memory was 38.0MB in the beginning and 80.5MB in the end (delta: -42.5MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * TraceAbstraction took 116455.96ms. Allocated memory was 107.0MB in the beginning and 2.9GB in the end (delta: 2.8GB). Free memory was 80.1MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. * Witness Printer took 33.89ms. Allocated memory is still 2.9GB. Free memory was 2.2GB in the beginning and 2.2GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 72 PlacesBefore, 20 PlacesAfterwards, 71 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 449 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 448, independent: 446, independent conditional: 0, independent unconditional: 446, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 218, independent: 216, independent conditional: 0, independent unconditional: 216, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 448, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 218, unknown conditional: 0, unknown unconditional: 218] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 78]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 116.3s, OverallIterations: 38, TraceHistogramMax: 8, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 81.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8844 SdHoareTripleChecker+Valid, 18.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8511 mSDsluCounter, 3473 SdHoareTripleChecker+Invalid, 15.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3300 mSDsCounter, 1605 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44673 IncrementalHoareTripleChecker+Invalid, 46278 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1605 mSolverCounterUnsat, 173 mSDtfsCounter, 44673 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2465 GetRequests, 623 SyntacticMatches, 50 SemanticMatches, 1792 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31147 ImplicationChecksByTransitivity, 29.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24146occurred in iteration=36, InterpolantAutomatonStates: 1275, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 21.9s InterpolantComputationTime, 1267 NumberOfCodeBlocks, 1267 NumberOfCodeBlocksAsserted, 130 NumberOfCheckSat, 1777 ConstructedInterpolants, 0 QuantifiedInterpolants, 19557 SizeOfPredicates, 219 NumberOfNonLiveVariables, 4594 ConjunctsInSsa, 931 ConjunctsInUnsatCore, 110 InterpolantComputations, 2 PerfectInterpolantSequences, 47/922 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 21:15:12,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE