./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-difference-det.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 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:24:30,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:24:30,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:24:30,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:24:30,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:24:30,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:24:30,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:24:30,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:24:30,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:24:30,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:24:30,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:24:30,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:24:30,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:24:30,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:24:30,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:24:30,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:24:30,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:24:30,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:24:30,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:24:30,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:24:30,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:24:30,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:24:30,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:24:30,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:24:30,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:24:30,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:24:30,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:24:30,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:24:30,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:24:30,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:24:30,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:24:30,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:24:30,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:24:30,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:24:30,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:24:30,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:24:30,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:24:30,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:24:30,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:24:30,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:24:30,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:24:30,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:24:30,534 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:24:30,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:24:30,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:24:30,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:24:30,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:24:30,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:24:30,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:24:30,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:24:30,537 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:24:30,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:24:30,538 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:24:30,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:24:30,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:24:30,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:24:30,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:24:30,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:24:30,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:24:30,540 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:24:30,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:24:30,540 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:24:30,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:24:30,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:24:30,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:24:30,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:24:30,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:24:30,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:24:30,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:24:30,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:24:30,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:24:30,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:24:30,542 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:24:30,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:24:30,543 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:24:30,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:24:30,543 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:24:30,543 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:24:30,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:24:30,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:24:30,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:24:30,838 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:24:30,838 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:24:30,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-09-01 13:24:32,055 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:24:32,282 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:24:32,283 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-09-01 13:24:32,288 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618af4e9d/80ada1d72b8c4161afc6c739794f8d7c/FLAG1e9efc755 [2023-09-01 13:24:32,298 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618af4e9d/80ada1d72b8c4161afc6c739794f8d7c [2023-09-01 13:24:32,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:24:32,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:24:32,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:24:32,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:24:32,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:24:32,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33bfd7e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32, skipping insertion in model container [2023-09-01 13:24:32,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:24:32,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:24:32,503 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-difference-det.wvr.c[2507,2520] [2023-09-01 13:24:32,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:24:32,521 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:24:32,557 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-difference-det.wvr.c[2507,2520] [2023-09-01 13:24:32,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:24:32,568 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:24:32,568 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:24:32,574 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:24:32,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32 WrapperNode [2023-09-01 13:24:32,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:24:32,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:24:32,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:24:32,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:24:32,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,627 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-09-01 13:24:32,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:24:32,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:24:32,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:24:32,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:24:32,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,668 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:24:32,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:24:32,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:24:32,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:24:32,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (1/1) ... [2023-09-01 13:24:32,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:24:32,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:32,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 13:24:32,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 13:24:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:24:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:24:32,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:24:32,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:24:32,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:24:32,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:24:32,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:24:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 13:24:32,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 13:24:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:24:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:24:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:24:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:24:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:24:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:24:32,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:24:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:24:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:24:32,773 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:24:32,912 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:24:32,914 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:24:33,105 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:24:33,157 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:24:33,157 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 13:24:33,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:24:33 BoogieIcfgContainer [2023-09-01 13:24:33,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:24:33,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:24:33,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:24:33,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:24:33,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:24:32" (1/3) ... [2023-09-01 13:24:33,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b204065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:24:33, skipping insertion in model container [2023-09-01 13:24:33,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:24:32" (2/3) ... [2023-09-01 13:24:33,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b204065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:24:33, skipping insertion in model container [2023-09-01 13:24:33,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:24:33" (3/3) ... [2023-09-01 13:24:33,172 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-09-01 13:24:33,178 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:24:33,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:24:33,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:24:33,187 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:24:33,249 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 13:24:33,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 125 transitions, 282 flow [2023-09-01 13:24:33,329 INFO L130 PetriNetUnfolder]: 9/121 cut-off events. [2023-09-01 13:24:33,329 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:24:33,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 121 events. 9/121 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-09-01 13:24:33,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 125 transitions, 282 flow [2023-09-01 13:24:33,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 109 transitions, 242 flow [2023-09-01 13:24:33,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:24:33,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 109 transitions, 242 flow [2023-09-01 13:24:33,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 109 transitions, 242 flow [2023-09-01 13:24:33,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 109 transitions, 242 flow [2023-09-01 13:24:33,391 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2023-09-01 13:24:33,392 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:24:33,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 109 events. 9/109 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-09-01 13:24:33,396 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-09-01 13:24:36,526 INFO L134 LiptonReduction]: Checked pairs total: 2650 [2023-09-01 13:24:36,526 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-09-01 13:24:36,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:24:36,543 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;@11aaedc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:24:36,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-09-01 13:24:36,551 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2023-09-01 13:24:36,552 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:24:36,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:36,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:36,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:36,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:36,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2017117140, now seen corresponding path program 1 times [2023-09-01 13:24:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:36,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956549368] [2023-09-01 13:24:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:36,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:36,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:36,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956549368] [2023-09-01 13:24:36,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956549368] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:24:36,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:24:36,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:24:36,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820196277] [2023-09-01 13:24:36,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:24:36,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:24:36,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:24:37,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:24:37,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-09-01 13:24:37,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:37,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-09-01 13:24:37,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:37,289 INFO L130 PetriNetUnfolder]: 1537/1954 cut-off events. [2023-09-01 13:24:37,289 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-09-01 13:24:37,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 1954 events. 1537/1954 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6416 event pairs, 141 based on Foata normal form. 1/1135 useless extension candidates. Maximal degree in co-relation 3091. Up to 1733 conditions per place. [2023-09-01 13:24:37,306 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-09-01 13:24:37,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 241 flow [2023-09-01 13:24:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:24:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:24:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-09-01 13:24:37,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707547169811321 [2023-09-01 13:24:37,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-09-01 13:24:37,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-09-01 13:24:37,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:37,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-09-01 13:24:37,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,349 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 363 transitions. [2023-09-01 13:24:37,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 241 flow [2023-09-01 13:24:37,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 51 transitions, 211 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 13:24:37,357 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 99 flow [2023-09-01 13:24:37,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-09-01 13:24:37,365 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-09-01 13:24:37,366 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 99 flow [2023-09-01 13:24:37,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:37,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:37,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:24:37,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:37,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1386775174, now seen corresponding path program 1 times [2023-09-01 13:24:37,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:37,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732906906] [2023-09-01 13:24:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:37,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732906906] [2023-09-01 13:24:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732906906] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:24:37,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:24:37,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:24:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662884506] [2023-09-01 13:24:37,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:24:37,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:24:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:37,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:24:37,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:24:37,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-09-01 13:24:37,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:37,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-09-01 13:24:37,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:37,894 INFO L130 PetriNetUnfolder]: 2495/3283 cut-off events. [2023-09-01 13:24:37,894 INFO L131 PetriNetUnfolder]: For 972/972 co-relation queries the response was YES. [2023-09-01 13:24:37,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8050 conditions, 3283 events. 2495/3283 cut-off events. For 972/972 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13635 event pairs, 520 based on Foata normal form. 48/3311 useless extension candidates. Maximal degree in co-relation 2873. Up to 1616 conditions per place. [2023-09-01 13:24:37,930 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 84 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-09-01 13:24:37,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 91 transitions, 452 flow [2023-09-01 13:24:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-09-01 13:24:37,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405660377358491 [2023-09-01 13:24:37,933 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-09-01 13:24:37,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-09-01 13:24:37,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:37,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-09-01 13:24:37,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,939 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,939 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 99 flow. Second operand 5 states and 573 transitions. [2023-09-01 13:24:37,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 91 transitions, 452 flow [2023-09-01 13:24:37,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 91 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:24:37,942 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 129 flow [2023-09-01 13:24:37,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-09-01 13:24:37,943 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-09-01 13:24:37,943 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 129 flow [2023-09-01 13:24:37,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:37,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:37,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:37,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:24:37,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:37,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:37,945 INFO L85 PathProgramCache]: Analyzing trace with hash -418684095, now seen corresponding path program 1 times [2023-09-01 13:24:37,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:37,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468407344] [2023-09-01 13:24:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:38,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:38,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468407344] [2023-09-01 13:24:38,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468407344] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:38,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474815685] [2023-09-01 13:24:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:38,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:38,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:38,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:38,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:24:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:38,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:24:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:38,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:38,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474815685] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:38,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:38,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 13:24:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784411899] [2023-09-01 13:24:38,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:38,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 13:24:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:38,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 13:24:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 13:24:38,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:24:38,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 100.75) internal successors, (806), 8 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:38,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:38,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:24:38,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:38,833 INFO L130 PetriNetUnfolder]: 3361/4509 cut-off events. [2023-09-01 13:24:38,833 INFO L131 PetriNetUnfolder]: For 3715/4180 co-relation queries the response was YES. [2023-09-01 13:24:38,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12634 conditions, 4509 events. 3361/4509 cut-off events. For 3715/4180 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 20174 event pairs, 707 based on Foata normal form. 570/5006 useless extension candidates. Maximal degree in co-relation 8079. Up to 1944 conditions per place. [2023-09-01 13:24:38,857 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 89 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-09-01 13:24:38,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 97 transitions, 532 flow [2023-09-01 13:24:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 565 transitions. [2023-09-01 13:24:38,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2023-09-01 13:24:38,860 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 565 transitions. [2023-09-01 13:24:38,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 565 transitions. [2023-09-01 13:24:38,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:38,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 565 transitions. [2023-09-01 13:24:38,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:38,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:38,865 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:38,865 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 129 flow. Second operand 5 states and 565 transitions. [2023-09-01 13:24:38,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 97 transitions, 532 flow [2023-09-01 13:24:38,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 97 transitions, 513 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 13:24:38,875 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 159 flow [2023-09-01 13:24:38,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-09-01 13:24:38,876 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-09-01 13:24:38,877 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 159 flow [2023-09-01 13:24:38,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.75) internal successors, (806), 8 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:38,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:38,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:38,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 13:24:39,085 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 [2023-09-01 13:24:39,085 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:39,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1510344313, now seen corresponding path program 1 times [2023-09-01 13:24:39,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:39,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742374859] [2023-09-01 13:24:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:39,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:39,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:39,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742374859] [2023-09-01 13:24:39,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742374859] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:39,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126807150] [2023-09-01 13:24:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:39,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:39,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:39,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:39,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:24:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:24:39,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:39,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:39,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126807150] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:39,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:39,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 13:24:39,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365993761] [2023-09-01 13:24:39,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:39,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 13:24:39,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 13:24:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 13:24:39,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:24:39,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:39,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:39,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:24:39,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:39,931 INFO L130 PetriNetUnfolder]: 3413/4567 cut-off events. [2023-09-01 13:24:39,932 INFO L131 PetriNetUnfolder]: For 5980/6404 co-relation queries the response was YES. [2023-09-01 13:24:39,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14384 conditions, 4567 events. 3413/4567 cut-off events. For 5980/6404 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20233 event pairs, 479 based on Foata normal form. 512/5013 useless extension candidates. Maximal degree in co-relation 11186. Up to 2034 conditions per place. [2023-09-01 13:24:39,960 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 88 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-09-01 13:24:39,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 96 transitions, 573 flow [2023-09-01 13:24:39,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 563 transitions. [2023-09-01 13:24:39,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311320754716982 [2023-09-01 13:24:39,963 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 563 transitions. [2023-09-01 13:24:39,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 563 transitions. [2023-09-01 13:24:39,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:39,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 563 transitions. [2023-09-01 13:24:39,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:39,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:39,967 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:39,968 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 159 flow. Second operand 5 states and 563 transitions. [2023-09-01 13:24:39,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 96 transitions, 573 flow [2023-09-01 13:24:39,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 96 transitions, 564 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 13:24:39,982 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 188 flow [2023-09-01 13:24:39,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-09-01 13:24:39,983 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-09-01 13:24:39,984 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 188 flow [2023-09-01 13:24:39,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:39,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:39,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:39,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:24:40,190 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 [2023-09-01 13:24:40,191 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:40,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1953734941, now seen corresponding path program 2 times [2023-09-01 13:24:40,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:40,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893624526] [2023-09-01 13:24:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:40,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:40,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:40,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893624526] [2023-09-01 13:24:40,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893624526] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:40,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500415641] [2023-09-01 13:24:40,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:24:40,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:40,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:40,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:24:40,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:24:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:24:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:24:40,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:40,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:40,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500415641] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:40,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:40,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 13:24:40,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174959876] [2023-09-01 13:24:40,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:40,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:24:40,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:40,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:24:40,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:24:40,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:24:40,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 188 flow. Second operand has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:40,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:40,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:24:40,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:41,302 INFO L130 PetriNetUnfolder]: 5065/6869 cut-off events. [2023-09-01 13:24:41,303 INFO L131 PetriNetUnfolder]: For 13799/14765 co-relation queries the response was YES. [2023-09-01 13:24:41,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 6869 events. 5065/6869 cut-off events. For 13799/14765 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 33838 event pairs, 649 based on Foata normal form. 1068/7721 useless extension candidates. Maximal degree in co-relation 16109. Up to 2724 conditions per place. [2023-09-01 13:24:41,351 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 149 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2023-09-01 13:24:41,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 166 transitions, 1054 flow [2023-09-01 13:24:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:24:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:24:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 907 transitions. [2023-09-01 13:24:41,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347877358490566 [2023-09-01 13:24:41,355 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 907 transitions. [2023-09-01 13:24:41,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 907 transitions. [2023-09-01 13:24:41,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:41,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 907 transitions. [2023-09-01 13:24:41,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.375) internal successors, (907), 8 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:41,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:41,362 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:41,362 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 188 flow. Second operand 8 states and 907 transitions. [2023-09-01 13:24:41,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 166 transitions, 1054 flow [2023-09-01 13:24:41,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 166 transitions, 1012 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-09-01 13:24:41,384 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 281 flow [2023-09-01 13:24:41,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=281, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-09-01 13:24:41,385 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-09-01 13:24:41,386 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 281 flow [2023-09-01 13:24:41,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:41,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:41,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:41,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:24:41,592 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 [2023-09-01 13:24:41,592 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:41,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:41,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1707640579, now seen corresponding path program 2 times [2023-09-01 13:24:41,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:41,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398307679] [2023-09-01 13:24:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:41,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:41,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:41,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398307679] [2023-09-01 13:24:41,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398307679] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:41,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802467921] [2023-09-01 13:24:41,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:24:41,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:41,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:41,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:41,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:24:41,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:24:41,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:24:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:24:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:41,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:41,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802467921] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:41,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:41,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 13:24:41,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94091259] [2023-09-01 13:24:41,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:41,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:24:41,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:41,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:24:41,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:24:41,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:24:41,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 281 flow. Second operand has 10 states, 10 states have (on average 100.3) internal successors, (1003), 10 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:41,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:41,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:24:41,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:43,001 INFO L130 PetriNetUnfolder]: 8404/11264 cut-off events. [2023-09-01 13:24:43,001 INFO L131 PetriNetUnfolder]: For 34345/36956 co-relation queries the response was YES. [2023-09-01 13:24:43,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43194 conditions, 11264 events. 8404/11264 cut-off events. For 34345/36956 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 57068 event pairs, 736 based on Foata normal form. 951/11972 useless extension candidates. Maximal degree in co-relation 36360. Up to 4803 conditions per place. [2023-09-01 13:24:43,090 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 175 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2023-09-01 13:24:43,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 193 transitions, 1524 flow [2023-09-01 13:24:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:24:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:24:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 901 transitions. [2023-09-01 13:24:43,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-09-01 13:24:43,093 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 901 transitions. [2023-09-01 13:24:43,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 901 transitions. [2023-09-01 13:24:43,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:43,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 901 transitions. [2023-09-01 13:24:43,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.625) internal successors, (901), 8 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:43,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:43,099 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:43,099 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 281 flow. Second operand 8 states and 901 transitions. [2023-09-01 13:24:43,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 193 transitions, 1524 flow [2023-09-01 13:24:43,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 193 transitions, 1424 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-09-01 13:24:43,153 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 370 flow [2023-09-01 13:24:43,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=370, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-09-01 13:24:43,154 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 28 predicate places. [2023-09-01 13:24:43,154 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 370 flow [2023-09-01 13:24:43,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.3) internal successors, (1003), 10 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:43,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:43,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:43,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 13:24:43,361 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 [2023-09-01 13:24:43,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:43,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:43,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2076753269, now seen corresponding path program 3 times [2023-09-01 13:24:43,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:43,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659022531] [2023-09-01 13:24:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:43,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:43,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659022531] [2023-09-01 13:24:43,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659022531] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668910568] [2023-09-01 13:24:43,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:24:43,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:43,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:43,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:43,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:24:43,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:24:43,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:24:43,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:24:43,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:43,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:43,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668910568] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:43,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:43,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 13:24:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753051779] [2023-09-01 13:24:43,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:43,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:24:43,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:43,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:24:43,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:24:43,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:24:43,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:43,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:43,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:24:43,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:45,021 INFO L130 PetriNetUnfolder]: 10652/14308 cut-off events. [2023-09-01 13:24:45,021 INFO L131 PetriNetUnfolder]: For 57338/60554 co-relation queries the response was YES. [2023-09-01 13:24:45,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60004 conditions, 14308 events. 10652/14308 cut-off events. For 57338/60554 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 76201 event pairs, 2167 based on Foata normal form. 1607/15471 useless extension candidates. Maximal degree in co-relation 50602. Up to 6486 conditions per place. [2023-09-01 13:24:45,122 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 125 selfloop transitions, 16 changer transitions 0/146 dead transitions. [2023-09-01 13:24:45,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 146 transitions, 1196 flow [2023-09-01 13:24:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-09-01 13:24:45,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2023-09-01 13:24:45,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-09-01 13:24:45,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-09-01 13:24:45,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:45,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-09-01 13:24:45,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:45,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:45,129 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:45,129 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 370 flow. Second operand 5 states and 570 transitions. [2023-09-01 13:24:45,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 146 transitions, 1196 flow [2023-09-01 13:24:45,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 146 transitions, 1146 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-09-01 13:24:45,237 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 473 flow [2023-09-01 13:24:45,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2023-09-01 13:24:45,238 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-09-01 13:24:45,238 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 473 flow [2023-09-01 13:24:45,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:45,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:45,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:45,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:24:45,445 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 [2023-09-01 13:24:45,445 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:45,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:45,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1065793488, now seen corresponding path program 1 times [2023-09-01 13:24:45,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:45,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250601421] [2023-09-01 13:24:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:45,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:45,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:45,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250601421] [2023-09-01 13:24:45,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250601421] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:24:45,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:24:45,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:24:45,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750851298] [2023-09-01 13:24:45,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:24:45,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:24:45,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:45,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:24:45,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:24:45,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-09-01 13:24:45,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:45,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:45,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-09-01 13:24:45,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:46,727 INFO L130 PetriNetUnfolder]: 11094/14850 cut-off events. [2023-09-01 13:24:46,727 INFO L131 PetriNetUnfolder]: For 61372/64597 co-relation queries the response was YES. [2023-09-01 13:24:46,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65847 conditions, 14850 events. 11094/14850 cut-off events. For 61372/64597 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 79472 event pairs, 971 based on Foata normal form. 1644/16054 useless extension candidates. Maximal degree in co-relation 56268. Up to 7770 conditions per place. [2023-09-01 13:24:46,813 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 115 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2023-09-01 13:24:46,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 1180 flow [2023-09-01 13:24:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-09-01 13:24:46,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349056603773585 [2023-09-01 13:24:46,816 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-09-01 13:24:46,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-09-01 13:24:46,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:46,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-09-01 13:24:46,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:46,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:46,820 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:46,820 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 473 flow. Second operand 5 states and 567 transitions. [2023-09-01 13:24:46,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 1180 flow [2023-09-01 13:24:47,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 1154 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-09-01 13:24:47,018 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 525 flow [2023-09-01 13:24:47,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-09-01 13:24:47,019 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 38 predicate places. [2023-09-01 13:24:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 525 flow [2023-09-01 13:24:47,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:47,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:47,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:47,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 13:24:47,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:47,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1179771516, now seen corresponding path program 2 times [2023-09-01 13:24:47,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:47,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751506142] [2023-09-01 13:24:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:47,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:47,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751506142] [2023-09-01 13:24:47,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751506142] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:24:47,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:24:47,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:24:47,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574967301] [2023-09-01 13:24:47,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:24:47,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:24:47,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:47,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:24:47,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:24:47,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-09-01 13:24:47,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 525 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:47,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:47,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-09-01 13:24:47,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:48,134 INFO L130 PetriNetUnfolder]: 9512/12930 cut-off events. [2023-09-01 13:24:48,134 INFO L131 PetriNetUnfolder]: For 70712/74116 co-relation queries the response was YES. [2023-09-01 13:24:48,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58319 conditions, 12930 events. 9512/12930 cut-off events. For 70712/74116 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 68496 event pairs, 2404 based on Foata normal form. 1498/14218 useless extension candidates. Maximal degree in co-relation 54145. Up to 7286 conditions per place. [2023-09-01 13:24:48,219 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 141 selfloop transitions, 11 changer transitions 0/158 dead transitions. [2023-09-01 13:24:48,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 158 transitions, 1568 flow [2023-09-01 13:24:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-09-01 13:24:48,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386792452830189 [2023-09-01 13:24:48,222 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-09-01 13:24:48,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-09-01 13:24:48,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:48,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-09-01 13:24:48,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:48,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:48,226 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:48,226 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 525 flow. Second operand 5 states and 571 transitions. [2023-09-01 13:24:48,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 158 transitions, 1568 flow [2023-09-01 13:24:48,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 158 transitions, 1508 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 13:24:48,361 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 547 flow [2023-09-01 13:24:48,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=547, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2023-09-01 13:24:48,362 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-09-01 13:24:48,363 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 547 flow [2023-09-01 13:24:48,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:48,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:48,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:48,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 13:24:48,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:48,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1826686174, now seen corresponding path program 2 times [2023-09-01 13:24:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:48,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030541382] [2023-09-01 13:24:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:48,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:48,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:48,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030541382] [2023-09-01 13:24:48,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030541382] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:24:48,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:24:48,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:24:48,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584745568] [2023-09-01 13:24:48,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:24:48,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:24:48,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:48,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:24:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:24:48,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-09-01 13:24:48,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 547 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:48,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:48,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-09-01 13:24:48,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:49,664 INFO L130 PetriNetUnfolder]: 10846/14650 cut-off events. [2023-09-01 13:24:49,664 INFO L131 PetriNetUnfolder]: For 77876/81912 co-relation queries the response was YES. [2023-09-01 13:24:49,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68476 conditions, 14650 events. 10846/14650 cut-off events. For 77876/81912 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 80807 event pairs, 2073 based on Foata normal form. 1808/16120 useless extension candidates. Maximal degree in co-relation 58877. Up to 7788 conditions per place. [2023-09-01 13:24:49,744 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 145 selfloop transitions, 12 changer transitions 2/164 dead transitions. [2023-09-01 13:24:49,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 164 transitions, 1513 flow [2023-09-01 13:24:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 577 transitions. [2023-09-01 13:24:49,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443396226415095 [2023-09-01 13:24:49,747 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 577 transitions. [2023-09-01 13:24:49,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 577 transitions. [2023-09-01 13:24:49,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:49,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 577 transitions. [2023-09-01 13:24:49,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:49,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:49,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:49,751 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 547 flow. Second operand 5 states and 577 transitions. [2023-09-01 13:24:49,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 164 transitions, 1513 flow [2023-09-01 13:24:49,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 164 transitions, 1427 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-09-01 13:24:49,880 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 578 flow [2023-09-01 13:24:49,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=578, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2023-09-01 13:24:49,881 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2023-09-01 13:24:49,881 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 578 flow [2023-09-01 13:24:49,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:49,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:49,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:49,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 13:24:49,882 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:49,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1678969827, now seen corresponding path program 3 times [2023-09-01 13:24:49,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:49,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362131635] [2023-09-01 13:24:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:49,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:49,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362131635] [2023-09-01 13:24:49,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362131635] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:49,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658162653] [2023-09-01 13:24:49,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:24:49,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:49,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:49,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:49,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:24:50,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:24:50,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:24:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:24:50,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:50,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:50,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658162653] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:50,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:50,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 13:24:50,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361354696] [2023-09-01 13:24:50,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:50,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:24:50,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:24:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:24:50,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:24:50,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 100.7) internal successors, (1007), 10 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:50,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:50,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:24:50,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:51,622 INFO L130 PetriNetUnfolder]: 12722/17437 cut-off events. [2023-09-01 13:24:51,622 INFO L131 PetriNetUnfolder]: For 95235/100050 co-relation queries the response was YES. [2023-09-01 13:24:51,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82937 conditions, 17437 events. 12722/17437 cut-off events. For 95235/100050 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 97111 event pairs, 3252 based on Foata normal form. 2507/19640 useless extension candidates. Maximal degree in co-relation 78353. Up to 8886 conditions per place. [2023-09-01 13:24:51,714 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 146 selfloop transitions, 17 changer transitions 0/170 dead transitions. [2023-09-01 13:24:51,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 170 transitions, 1757 flow [2023-09-01 13:24:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2023-09-01 13:24:51,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320754716981132 [2023-09-01 13:24:51,717 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2023-09-01 13:24:51,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2023-09-01 13:24:51,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:51,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2023-09-01 13:24:51,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:51,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:51,720 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:51,721 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 578 flow. Second operand 5 states and 564 transitions. [2023-09-01 13:24:51,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 170 transitions, 1757 flow [2023-09-01 13:24:51,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1685 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-09-01 13:24:51,915 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 676 flow [2023-09-01 13:24:51,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=676, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2023-09-01 13:24:51,915 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-09-01 13:24:51,915 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 676 flow [2023-09-01 13:24:51,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.7) internal successors, (1007), 10 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:51,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:51,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:51,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 13:24:52,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:52,117 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:52,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1635530536, now seen corresponding path program 3 times [2023-09-01 13:24:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:52,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975105489] [2023-09-01 13:24:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:52,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:52,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975105489] [2023-09-01 13:24:52,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975105489] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:24:52,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:24:52,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:24:52,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067201163] [2023-09-01 13:24:52,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:24:52,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:24:52,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:24:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:24:52,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-09-01 13:24:52,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:52,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:52,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-09-01 13:24:52,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:53,731 INFO L130 PetriNetUnfolder]: 11930/16332 cut-off events. [2023-09-01 13:24:53,731 INFO L131 PetriNetUnfolder]: For 107941/112532 co-relation queries the response was YES. [2023-09-01 13:24:53,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81495 conditions, 16332 events. 11930/16332 cut-off events. For 107941/112532 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 93538 event pairs, 3390 based on Foata normal form. 2076/18144 useless extension candidates. Maximal degree in co-relation 66105. Up to 8704 conditions per place. [2023-09-01 13:24:53,851 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 154 selfloop transitions, 16 changer transitions 2/178 dead transitions. [2023-09-01 13:24:53,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 178 transitions, 1746 flow [2023-09-01 13:24:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2023-09-01 13:24:53,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2023-09-01 13:24:53,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2023-09-01 13:24:53,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2023-09-01 13:24:53,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:53,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2023-09-01 13:24:53,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:53,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:53,859 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:53,859 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 676 flow. Second operand 5 states and 575 transitions. [2023-09-01 13:24:53,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 178 transitions, 1746 flow [2023-09-01 13:24:54,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 178 transitions, 1700 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-09-01 13:24:54,033 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 722 flow [2023-09-01 13:24:54,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=722, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2023-09-01 13:24:54,034 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-09-01 13:24:54,034 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 722 flow [2023-09-01 13:24:54,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:54,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:54,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:54,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 13:24:54,035 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:54,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:54,035 INFO L85 PathProgramCache]: Analyzing trace with hash 439687930, now seen corresponding path program 4 times [2023-09-01 13:24:54,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:54,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448024930] [2023-09-01 13:24:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:54,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:54,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:54,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448024930] [2023-09-01 13:24:54,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448024930] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:24:54,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:24:54,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:24:54,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540935677] [2023-09-01 13:24:54,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:24:54,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:24:54,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:54,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:24:54,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:24:54,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-09-01 13:24:54,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 722 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:54,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:54,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-09-01 13:24:54,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:55,513 INFO L130 PetriNetUnfolder]: 12388/16950 cut-off events. [2023-09-01 13:24:55,513 INFO L131 PetriNetUnfolder]: For 111307/115949 co-relation queries the response was YES. [2023-09-01 13:24:55,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86451 conditions, 16950 events. 12388/16950 cut-off events. For 111307/115949 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 95622 event pairs, 3634 based on Foata normal form. 1900/18564 useless extension candidates. Maximal degree in co-relation 76477. Up to 8836 conditions per place. [2023-09-01 13:24:55,612 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 155 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2023-09-01 13:24:55,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 176 transitions, 1769 flow [2023-09-01 13:24:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-09-01 13:24:55,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386792452830189 [2023-09-01 13:24:55,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-09-01 13:24:55,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-09-01 13:24:55,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:55,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-09-01 13:24:55,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:55,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:55,617 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:55,617 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 722 flow. Second operand 5 states and 571 transitions. [2023-09-01 13:24:55,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 176 transitions, 1769 flow [2023-09-01 13:24:55,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 176 transitions, 1725 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-09-01 13:24:55,870 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 728 flow [2023-09-01 13:24:55,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=728, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2023-09-01 13:24:55,871 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-09-01 13:24:55,871 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 728 flow [2023-09-01 13:24:55,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:55,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:55,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:55,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 13:24:55,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:55,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash 496335170, now seen corresponding path program 3 times [2023-09-01 13:24:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:55,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329929321] [2023-09-01 13:24:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:55,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:55,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:55,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329929321] [2023-09-01 13:24:55,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329929321] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:24:55,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:24:55,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:24:55,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595374274] [2023-09-01 13:24:55,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:24:55,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:24:55,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:55,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:24:55,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:24:55,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-09-01 13:24:55,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 728 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:55,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:55,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-09-01 13:24:55,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:57,629 INFO L130 PetriNetUnfolder]: 13022/17777 cut-off events. [2023-09-01 13:24:57,629 INFO L131 PetriNetUnfolder]: For 115257/120649 co-relation queries the response was YES. [2023-09-01 13:24:57,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90874 conditions, 17777 events. 13022/17777 cut-off events. For 115257/120649 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 99379 event pairs, 3174 based on Foata normal form. 2689/20312 useless extension candidates. Maximal degree in co-relation 82150. Up to 9978 conditions per place. [2023-09-01 13:24:57,725 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 159 selfloop transitions, 13 changer transitions 0/179 dead transitions. [2023-09-01 13:24:57,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 179 transitions, 1966 flow [2023-09-01 13:24:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-09-01 13:24:57,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349056603773585 [2023-09-01 13:24:57,727 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-09-01 13:24:57,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-09-01 13:24:57,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:57,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-09-01 13:24:57,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:57,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:57,731 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:57,731 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 728 flow. Second operand 5 states and 567 transitions. [2023-09-01 13:24:57,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 179 transitions, 1966 flow [2023-09-01 13:24:57,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 179 transitions, 1874 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 13:24:57,911 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 735 flow [2023-09-01 13:24:57,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=735, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2023-09-01 13:24:57,911 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 60 predicate places. [2023-09-01 13:24:57,911 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 735 flow [2023-09-01 13:24:57,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:57,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:24:57,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:24:57,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 13:24:57,912 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:24:57,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:24:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash 261516316, now seen corresponding path program 4 times [2023-09-01 13:24:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:24:57,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973257988] [2023-09-01 13:24:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:24:57,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:24:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:24:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:24:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973257988] [2023-09-01 13:24:57,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973257988] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:24:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733122247] [2023-09-01 13:24:57,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:24:57,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:24:57,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:24:57,973 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:24:58,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:24:58,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:24:58,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:24:58,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:24:58,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:24:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:58,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:24:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:24:58,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733122247] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:24:58,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:24:58,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 13:24:58,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516246332] [2023-09-01 13:24:58,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:24:58,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 13:24:58,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:24:58,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 13:24:58,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 13:24:58,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:24:58,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 735 flow. Second operand has 8 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:58,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:24:58,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:24:58,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:24:59,741 INFO L130 PetriNetUnfolder]: 13620/18549 cut-off events. [2023-09-01 13:24:59,741 INFO L131 PetriNetUnfolder]: For 116629/122375 co-relation queries the response was YES. [2023-09-01 13:24:59,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96364 conditions, 18549 events. 13620/18549 cut-off events. For 116629/122375 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 104631 event pairs, 1504 based on Foata normal form. 2887/21276 useless extension candidates. Maximal degree in co-relation 87643. Up to 8289 conditions per place. [2023-09-01 13:24:59,836 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 155 selfloop transitions, 16 changer transitions 0/178 dead transitions. [2023-09-01 13:24:59,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 178 transitions, 1933 flow [2023-09-01 13:24:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:24:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:24:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-09-01 13:24:59,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2023-09-01 13:24:59,838 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-09-01 13:24:59,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-09-01 13:24:59,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:59,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-09-01 13:24:59,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:59,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:59,842 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:59,842 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 735 flow. Second operand 5 states and 555 transitions. [2023-09-01 13:24:59,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 178 transitions, 1933 flow [2023-09-01 13:25:00,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 178 transitions, 1899 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 13:25:00,042 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 777 flow [2023-09-01 13:25:00,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=777, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2023-09-01 13:25:00,042 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2023-09-01 13:25:00,043 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 777 flow [2023-09-01 13:25:00,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:00,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:00,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:00,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:00,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:00,247 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:00,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:00,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1703650341, now seen corresponding path program 4 times [2023-09-01 13:25:00,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:00,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192384213] [2023-09-01 13:25:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:00,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:00,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:00,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192384213] [2023-09-01 13:25:00,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192384213] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:00,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:00,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:00,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301648716] [2023-09-01 13:25:00,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:00,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:25:00,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:00,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:25:00,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:25:00,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-09-01 13:25:00,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 777 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:00,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:00,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-09-01 13:25:00,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:02,102 INFO L130 PetriNetUnfolder]: 13966/19130 cut-off events. [2023-09-01 13:25:02,102 INFO L131 PetriNetUnfolder]: For 140441/146439 co-relation queries the response was YES. [2023-09-01 13:25:02,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100921 conditions, 19130 events. 13966/19130 cut-off events. For 140441/146439 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 109510 event pairs, 3588 based on Foata normal form. 2911/21877 useless extension candidates. Maximal degree in co-relation 91788. Up to 10240 conditions per place. [2023-09-01 13:25:02,203 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 166 selfloop transitions, 17 changer transitions 2/192 dead transitions. [2023-09-01 13:25:02,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 192 transitions, 2089 flow [2023-09-01 13:25:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:25:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:25:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-09-01 13:25:02,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367924528301887 [2023-09-01 13:25:02,205 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-09-01 13:25:02,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-09-01 13:25:02,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:02,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-09-01 13:25:02,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:02,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:02,208 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:02,208 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 777 flow. Second operand 5 states and 569 transitions. [2023-09-01 13:25:02,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 192 transitions, 2089 flow [2023-09-01 13:25:02,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 192 transitions, 2067 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 13:25:02,509 INFO L231 Difference]: Finished difference. Result has 106 places, 85 transitions, 837 flow [2023-09-01 13:25:02,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=837, PETRI_PLACES=106, PETRI_TRANSITIONS=85} [2023-09-01 13:25:02,510 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2023-09-01 13:25:02,510 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 85 transitions, 837 flow [2023-09-01 13:25:02,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:02,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:02,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:02,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 13:25:02,511 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:02,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1101080746, now seen corresponding path program 5 times [2023-09-01 13:25:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:02,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420895324] [2023-09-01 13:25:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:02,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:02,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:02,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420895324] [2023-09-01 13:25:02,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420895324] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:02,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:02,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:02,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217038507] [2023-09-01 13:25:02,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:02,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:25:02,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:25:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:25:02,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-09-01 13:25:02,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 85 transitions, 837 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:02,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:02,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-09-01 13:25:02,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:04,157 INFO L130 PetriNetUnfolder]: 13782/18946 cut-off events. [2023-09-01 13:25:04,157 INFO L131 PetriNetUnfolder]: For 144705/150703 co-relation queries the response was YES. [2023-09-01 13:25:04,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104440 conditions, 18946 events. 13782/18946 cut-off events. For 144705/150703 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 109100 event pairs, 3110 based on Foata normal form. 3003/21785 useless extension candidates. Maximal degree in co-relation 94992. Up to 8406 conditions per place. [2023-09-01 13:25:04,285 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 161 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2023-09-01 13:25:04,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 2056 flow [2023-09-01 13:25:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:25:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:25:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-09-01 13:25:04,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367924528301887 [2023-09-01 13:25:04,289 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-09-01 13:25:04,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-09-01 13:25:04,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:04,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-09-01 13:25:04,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:04,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:04,292 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:04,292 INFO L175 Difference]: Start difference. First operand has 106 places, 85 transitions, 837 flow. Second operand 5 states and 569 transitions. [2023-09-01 13:25:04,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 2056 flow [2023-09-01 13:25:04,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 187 transitions, 2032 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 13:25:04,664 INFO L231 Difference]: Finished difference. Result has 110 places, 86 transitions, 870 flow [2023-09-01 13:25:04,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=870, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2023-09-01 13:25:04,665 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2023-09-01 13:25:04,665 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 870 flow [2023-09-01 13:25:04,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:04,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:04,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:04,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 13:25:04,666 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:04,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1916988810, now seen corresponding path program 6 times [2023-09-01 13:25:04,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:04,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451462272] [2023-09-01 13:25:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:04,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:04,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:04,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451462272] [2023-09-01 13:25:04,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451462272] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:04,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:04,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:04,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585200772] [2023-09-01 13:25:04,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:04,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:25:04,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:04,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:25:04,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:25:04,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-09-01 13:25:04,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:04,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:04,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-09-01 13:25:04,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:06,389 INFO L130 PetriNetUnfolder]: 12572/17218 cut-off events. [2023-09-01 13:25:06,390 INFO L131 PetriNetUnfolder]: For 144675/150095 co-relation queries the response was YES. [2023-09-01 13:25:06,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96545 conditions, 17218 events. 12572/17218 cut-off events. For 144675/150095 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 97225 event pairs, 3226 based on Foata normal form. 2755/19817 useless extension candidates. Maximal degree in co-relation 87804. Up to 9096 conditions per place. [2023-09-01 13:25:06,502 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 177 selfloop transitions, 22 changer transitions 4/210 dead transitions. [2023-09-01 13:25:06,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 210 transitions, 2349 flow [2023-09-01 13:25:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:25:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:25:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 674 transitions. [2023-09-01 13:25:06,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529874213836478 [2023-09-01 13:25:06,505 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 674 transitions. [2023-09-01 13:25:06,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 674 transitions. [2023-09-01 13:25:06,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:06,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 674 transitions. [2023-09-01 13:25:06,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.33333333333333) internal successors, (674), 6 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:06,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:06,509 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:06,509 INFO L175 Difference]: Start difference. First operand has 110 places, 86 transitions, 870 flow. Second operand 6 states and 674 transitions. [2023-09-01 13:25:06,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 210 transitions, 2349 flow [2023-09-01 13:25:07,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 2308 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 13:25:07,088 INFO L231 Difference]: Finished difference. Result has 113 places, 89 transitions, 926 flow [2023-09-01 13:25:07,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=926, PETRI_PLACES=113, PETRI_TRANSITIONS=89} [2023-09-01 13:25:07,088 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-09-01 13:25:07,088 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 89 transitions, 926 flow [2023-09-01 13:25:07,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:07,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:07,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:07,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 13:25:07,089 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:07,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash -834954938, now seen corresponding path program 5 times [2023-09-01 13:25:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:07,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571427779] [2023-09-01 13:25:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:07,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:07,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:07,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571427779] [2023-09-01 13:25:07,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571427779] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:07,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:07,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826913800] [2023-09-01 13:25:07,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:07,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:25:07,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:07,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:25:07,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:25:07,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-09-01 13:25:07,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 89 transitions, 926 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:07,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:07,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-09-01 13:25:07,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:08,460 INFO L130 PetriNetUnfolder]: 11478/15699 cut-off events. [2023-09-01 13:25:08,460 INFO L131 PetriNetUnfolder]: For 158993/165969 co-relation queries the response was YES. [2023-09-01 13:25:08,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88786 conditions, 15699 events. 11478/15699 cut-off events. For 158993/165969 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 90292 event pairs, 2724 based on Foata normal form. 2978/18424 useless extension candidates. Maximal degree in co-relation 80026. Up to 8044 conditions per place. [2023-09-01 13:25:08,572 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 192 selfloop transitions, 22 changer transitions 14/236 dead transitions. [2023-09-01 13:25:08,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 236 transitions, 2900 flow [2023-09-01 13:25:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:25:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:25:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 678 transitions. [2023-09-01 13:25:08,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2023-09-01 13:25:08,574 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 678 transitions. [2023-09-01 13:25:08,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 678 transitions. [2023-09-01 13:25:08,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:08,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 678 transitions. [2023-09-01 13:25:08,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:08,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:08,576 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:08,576 INFO L175 Difference]: Start difference. First operand has 113 places, 89 transitions, 926 flow. Second operand 6 states and 678 transitions. [2023-09-01 13:25:08,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 236 transitions, 2900 flow [2023-09-01 13:25:09,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 236 transitions, 2681 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-09-01 13:25:09,025 INFO L231 Difference]: Finished difference. Result has 116 places, 93 transitions, 983 flow [2023-09-01 13:25:09,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=983, PETRI_PLACES=116, PETRI_TRANSITIONS=93} [2023-09-01 13:25:09,025 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2023-09-01 13:25:09,026 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 93 transitions, 983 flow [2023-09-01 13:25:09,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:09,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:09,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:09,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 13:25:09,027 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:09,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1962537474, now seen corresponding path program 6 times [2023-09-01 13:25:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:09,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769587183] [2023-09-01 13:25:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:09,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:09,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:09,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769587183] [2023-09-01 13:25:09,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769587183] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:09,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:09,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:25:09,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488786163] [2023-09-01 13:25:09,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:09,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:25:09,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:25:09,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:25:09,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-09-01 13:25:09,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 93 transitions, 983 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:09,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:09,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-09-01 13:25:09,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:10,448 INFO L130 PetriNetUnfolder]: 10594/14533 cut-off events. [2023-09-01 13:25:10,448 INFO L131 PetriNetUnfolder]: For 149934/156027 co-relation queries the response was YES. [2023-09-01 13:25:10,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84105 conditions, 14533 events. 10594/14533 cut-off events. For 149934/156027 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 81784 event pairs, 2384 based on Foata normal form. 2529/16860 useless extension candidates. Maximal degree in co-relation 75793. Up to 6316 conditions per place. [2023-09-01 13:25:10,541 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 180 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2023-09-01 13:25:10,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 207 transitions, 2457 flow [2023-09-01 13:25:10,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:25:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:25:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-09-01 13:25:10,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349056603773585 [2023-09-01 13:25:10,543 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-09-01 13:25:10,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-09-01 13:25:10,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:10,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-09-01 13:25:10,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:10,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:10,545 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:10,545 INFO L175 Difference]: Start difference. First operand has 116 places, 93 transitions, 983 flow. Second operand 5 states and 567 transitions. [2023-09-01 13:25:10,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 207 transitions, 2457 flow [2023-09-01 13:25:10,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 207 transitions, 2394 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-09-01 13:25:10,833 INFO L231 Difference]: Finished difference. Result has 118 places, 94 transitions, 990 flow [2023-09-01 13:25:10,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=990, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2023-09-01 13:25:10,833 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-09-01 13:25:10,833 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 990 flow [2023-09-01 13:25:10,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:10,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:10,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:10,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 13:25:10,834 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:10,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1846128017, now seen corresponding path program 1 times [2023-09-01 13:25:10,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:10,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032599677] [2023-09-01 13:25:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:10,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:25:10,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:10,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032599677] [2023-09-01 13:25:10,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032599677] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:25:10,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:25:10,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:25:10,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804447283] [2023-09-01 13:25:10,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:25:10,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:25:10,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:10,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:25:10,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:25:10,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 212 [2023-09-01 13:25:10,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 94 transitions, 990 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:10,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:10,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 212 [2023-09-01 13:25:10,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:11,675 INFO L130 PetriNetUnfolder]: 6080/8552 cut-off events. [2023-09-01 13:25:11,675 INFO L131 PetriNetUnfolder]: For 104356/111588 co-relation queries the response was YES. [2023-09-01 13:25:11,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49938 conditions, 8552 events. 6080/8552 cut-off events. For 104356/111588 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 49692 event pairs, 2052 based on Foata normal form. 3234/11552 useless extension candidates. Maximal degree in co-relation 46225. Up to 5745 conditions per place. [2023-09-01 13:25:11,734 INFO L137 encePairwiseOnDemand]: 209/212 looper letters, 80 selfloop transitions, 10 changer transitions 15/119 dead transitions. [2023-09-01 13:25:11,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 1359 flow [2023-09-01 13:25:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:25:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:25:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-09-01 13:25:11,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738993710691824 [2023-09-01 13:25:11,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-09-01 13:25:11,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-09-01 13:25:11,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:11,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-09-01 13:25:11,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:11,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:11,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:11,740 INFO L175 Difference]: Start difference. First operand has 118 places, 94 transitions, 990 flow. Second operand 3 states and 365 transitions. [2023-09-01 13:25:11,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 1359 flow [2023-09-01 13:25:11,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 1316 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 13:25:11,885 INFO L231 Difference]: Finished difference. Result has 118 places, 83 transitions, 869 flow [2023-09-01 13:25:11,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=869, PETRI_PLACES=118, PETRI_TRANSITIONS=83} [2023-09-01 13:25:11,886 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-09-01 13:25:11,886 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 83 transitions, 869 flow [2023-09-01 13:25:11,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:11,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:11,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:11,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 13:25:11,887 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:11,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:11,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1030320933, now seen corresponding path program 1 times [2023-09-01 13:25:11,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:11,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394873869] [2023-09-01 13:25:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:11,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:11,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:11,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394873869] [2023-09-01 13:25:11,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394873869] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749839832] [2023-09-01 13:25:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:11,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:11,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:12,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:12,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:25:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 13:25:12,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:12,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:25:12,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749839832] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:12,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:12,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-09-01 13:25:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142181610] [2023-09-01 13:25:12,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:12,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:25:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:25:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:25:12,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-09-01 13:25:12,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 83 transitions, 869 flow. Second operand has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:12,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:12,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-09-01 13:25:12,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:13,703 INFO L130 PetriNetUnfolder]: 11144/15339 cut-off events. [2023-09-01 13:25:13,703 INFO L131 PetriNetUnfolder]: For 142210/151798 co-relation queries the response was YES. [2023-09-01 13:25:13,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83356 conditions, 15339 events. 11144/15339 cut-off events. For 142210/151798 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 86220 event pairs, 1030 based on Foata normal form. 4585/19766 useless extension candidates. Maximal degree in co-relation 82420. Up to 8061 conditions per place. [2023-09-01 13:25:13,857 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 163 selfloop transitions, 83 changer transitions 5/265 dead transitions. [2023-09-01 13:25:13,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 265 transitions, 2815 flow [2023-09-01 13:25:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:25:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:25:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2023-09-01 13:25:13,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815363881401617 [2023-09-01 13:25:13,859 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2023-09-01 13:25:13,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2023-09-01 13:25:13,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:13,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2023-09-01 13:25:13,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:13,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:13,861 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:13,862 INFO L175 Difference]: Start difference. First operand has 118 places, 83 transitions, 869 flow. Second operand 7 states and 863 transitions. [2023-09-01 13:25:13,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 265 transitions, 2815 flow [2023-09-01 13:25:14,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 265 transitions, 2738 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-09-01 13:25:14,171 INFO L231 Difference]: Finished difference. Result has 111 places, 150 transitions, 1877 flow [2023-09-01 13:25:14,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1877, PETRI_PLACES=111, PETRI_TRANSITIONS=150} [2023-09-01 13:25:14,172 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2023-09-01 13:25:14,172 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 150 transitions, 1877 flow [2023-09-01 13:25:14,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:14,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:14,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:14,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:14,372 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,SelfDestructingSolverStorable21 [2023-09-01 13:25:14,373 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:14,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1938151797, now seen corresponding path program 2 times [2023-09-01 13:25:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:14,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132698531] [2023-09-01 13:25:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:14,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:14,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:14,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132698531] [2023-09-01 13:25:14,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132698531] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:14,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416628123] [2023-09-01 13:25:14,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:25:14,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:14,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:14,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:14,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:25:14,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:25:14,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:14,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 13:25:14,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:14,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:14,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416628123] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:14,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:14,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-09-01 13:25:14,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820439878] [2023-09-01 13:25:14,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:14,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:25:14,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:25:14,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:25:14,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-09-01 13:25:14,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 150 transitions, 1877 flow. Second operand has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:14,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:14,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-09-01 13:25:14,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:16,838 INFO L130 PetriNetUnfolder]: 16518/22700 cut-off events. [2023-09-01 13:25:16,838 INFO L131 PetriNetUnfolder]: For 224549/237152 co-relation queries the response was YES. [2023-09-01 13:25:16,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131803 conditions, 22700 events. 16518/22700 cut-off events. For 224549/237152 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 133422 event pairs, 2818 based on Foata normal form. 5149/27700 useless extension candidates. Maximal degree in co-relation 115802. Up to 16448 conditions per place. [2023-09-01 13:25:17,039 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 235 selfloop transitions, 79 changer transitions 5/333 dead transitions. [2023-09-01 13:25:17,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 333 transitions, 4176 flow [2023-09-01 13:25:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:25:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:25:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 859 transitions. [2023-09-01 13:25:17,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788409703504043 [2023-09-01 13:25:17,041 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 859 transitions. [2023-09-01 13:25:17,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 859 transitions. [2023-09-01 13:25:17,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:17,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 859 transitions. [2023-09-01 13:25:17,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:17,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:17,044 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:17,044 INFO L175 Difference]: Start difference. First operand has 111 places, 150 transitions, 1877 flow. Second operand 7 states and 859 transitions. [2023-09-01 13:25:17,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 333 transitions, 4176 flow [2023-09-01 13:25:17,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 333 transitions, 3970 flow, removed 103 selfloop flow, removed 0 redundant places. [2023-09-01 13:25:17,668 INFO L231 Difference]: Finished difference. Result has 120 places, 222 transitions, 2956 flow [2023-09-01 13:25:17,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2956, PETRI_PLACES=120, PETRI_TRANSITIONS=222} [2023-09-01 13:25:17,669 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-09-01 13:25:17,669 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 222 transitions, 2956 flow [2023-09-01 13:25:17,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:17,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:17,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:17,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:17,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:17,875 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:17,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1252895162, now seen corresponding path program 3 times [2023-09-01 13:25:17,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:17,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584683787] [2023-09-01 13:25:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:17,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:17,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:17,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584683787] [2023-09-01 13:25:17,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584683787] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:17,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365805725] [2023-09-01 13:25:17,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:25:17,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:17,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:17,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:17,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:25:18,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:25:18,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:18,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:25:18,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:18,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:18,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365805725] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:18,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:18,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 13:25:18,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673795109] [2023-09-01 13:25:18,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:18,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:25:18,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:25:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:25:18,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:25:18,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 222 transitions, 2956 flow. Second operand has 11 states, 11 states have (on average 100.0909090909091) internal successors, (1101), 11 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:18,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:18,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:25:18,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:21,680 INFO L130 PetriNetUnfolder]: 24378/33563 cut-off events. [2023-09-01 13:25:21,681 INFO L131 PetriNetUnfolder]: For 352237/367754 co-relation queries the response was YES. [2023-09-01 13:25:21,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195633 conditions, 33563 events. 24378/33563 cut-off events. For 352237/367754 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 206013 event pairs, 4662 based on Foata normal form. 6301/39773 useless extension candidates. Maximal degree in co-relation 178805. Up to 17876 conditions per place. [2023-09-01 13:25:22,138 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 424 selfloop transitions, 39 changer transitions 0/471 dead transitions. [2023-09-01 13:25:22,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 471 transitions, 6731 flow [2023-09-01 13:25:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:25:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:25:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 786 transitions. [2023-09-01 13:25:22,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296495956873315 [2023-09-01 13:25:22,140 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 786 transitions. [2023-09-01 13:25:22,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 786 transitions. [2023-09-01 13:25:22,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:22,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 786 transitions. [2023-09-01 13:25:22,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.28571428571429) internal successors, (786), 7 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:22,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:22,143 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:22,143 INFO L175 Difference]: Start difference. First operand has 120 places, 222 transitions, 2956 flow. Second operand 7 states and 786 transitions. [2023-09-01 13:25:22,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 471 transitions, 6731 flow [2023-09-01 13:25:23,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 471 transitions, 6219 flow, removed 256 selfloop flow, removed 0 redundant places. [2023-09-01 13:25:23,577 INFO L231 Difference]: Finished difference. Result has 130 places, 245 transitions, 3052 flow [2023-09-01 13:25:23,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3052, PETRI_PLACES=130, PETRI_TRANSITIONS=245} [2023-09-01 13:25:23,578 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-09-01 13:25:23,578 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 245 transitions, 3052 flow [2023-09-01 13:25:23,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 100.0909090909091) internal successors, (1101), 11 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:23,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:23,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:23,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:23,779 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,SelfDestructingSolverStorable23 [2023-09-01 13:25:23,779 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:23,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:23,780 INFO L85 PathProgramCache]: Analyzing trace with hash -563281195, now seen corresponding path program 4 times [2023-09-01 13:25:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:23,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120688009] [2023-09-01 13:25:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:23,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120688009] [2023-09-01 13:25:23,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120688009] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362771788] [2023-09-01 13:25:23,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:25:23,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:23,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:23,855 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:23,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:25:23,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:25:23,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:23,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:25:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:24,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:24,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362771788] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:24,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:24,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 13:25:24,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183278773] [2023-09-01 13:25:24,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:24,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:25:24,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:24,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:25:24,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:25:24,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:25:24,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 245 transitions, 3052 flow. Second operand has 11 states, 11 states have (on average 100.18181818181819) internal successors, (1102), 11 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:24,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:24,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:25:24,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:27,958 INFO L130 PetriNetUnfolder]: 25169/34809 cut-off events. [2023-09-01 13:25:27,958 INFO L131 PetriNetUnfolder]: For 399996/414714 co-relation queries the response was YES. [2023-09-01 13:25:28,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203217 conditions, 34809 events. 25169/34809 cut-off events. For 399996/414714 co-relation queries the response was YES. Maximal size of possible extension queue 1873. Compared 220721 event pairs, 4386 based on Foata normal form. 6104/40636 useless extension candidates. Maximal degree in co-relation 184960. Up to 16345 conditions per place. [2023-09-01 13:25:29,296 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 721 selfloop transitions, 54 changer transitions 34/817 dead transitions. [2023-09-01 13:25:29,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 817 transitions, 11389 flow [2023-09-01 13:25:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:25:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:25:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1215 transitions. [2023-09-01 13:25:29,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210120068610634 [2023-09-01 13:25:29,298 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1215 transitions. [2023-09-01 13:25:29,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1215 transitions. [2023-09-01 13:25:29,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:29,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1215 transitions. [2023-09-01 13:25:29,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 110.45454545454545) internal successors, (1215), 11 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:29,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:29,303 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:29,303 INFO L175 Difference]: Start difference. First operand has 130 places, 245 transitions, 3052 flow. Second operand 11 states and 1215 transitions. [2023-09-01 13:25:29,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 817 transitions, 11389 flow [2023-09-01 13:25:30,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 817 transitions, 11302 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-09-01 13:25:30,311 INFO L231 Difference]: Finished difference. Result has 143 places, 273 transitions, 3501 flow [2023-09-01 13:25:30,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3501, PETRI_PLACES=143, PETRI_TRANSITIONS=273} [2023-09-01 13:25:30,311 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2023-09-01 13:25:30,312 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 273 transitions, 3501 flow [2023-09-01 13:25:30,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 100.18181818181819) internal successors, (1102), 11 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:30,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:30,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:30,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:30,513 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,SelfDestructingSolverStorable24 [2023-09-01 13:25:30,513 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:30,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1667997905, now seen corresponding path program 5 times [2023-09-01 13:25:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:30,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884680771] [2023-09-01 13:25:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:30,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:30,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:30,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884680771] [2023-09-01 13:25:30,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884680771] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846657766] [2023-09-01 13:25:30,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:25:30,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:30,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:30,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:30,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:25:30,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:25:30,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:30,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:25:30,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:30,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:30,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846657766] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:30,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:30,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 13:25:30,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210525241] [2023-09-01 13:25:30,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:30,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:25:30,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:30,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:25:30,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:25:30,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:25:30,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 273 transitions, 3501 flow. Second operand has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:30,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:30,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:25:30,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:39,422 INFO L130 PetriNetUnfolder]: 45403/62726 cut-off events. [2023-09-01 13:25:39,422 INFO L131 PetriNetUnfolder]: For 689282/716371 co-relation queries the response was YES. [2023-09-01 13:25:39,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379482 conditions, 62726 events. 45403/62726 cut-off events. For 689282/716371 co-relation queries the response was YES. Maximal size of possible extension queue 3089. Compared 416038 event pairs, 10097 based on Foata normal form. 11614/74086 useless extension candidates. Maximal degree in co-relation 332966. Up to 23541 conditions per place. [2023-09-01 13:25:40,186 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 740 selfloop transitions, 152 changer transitions 0/900 dead transitions. [2023-09-01 13:25:40,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 900 transitions, 12321 flow [2023-09-01 13:25:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:25:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:25:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1459 transitions. [2023-09-01 13:25:40,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293904208998549 [2023-09-01 13:25:40,188 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1459 transitions. [2023-09-01 13:25:40,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1459 transitions. [2023-09-01 13:25:40,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:40,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1459 transitions. [2023-09-01 13:25:40,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.23076923076923) internal successors, (1459), 13 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:40,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 212.0) internal successors, (2968), 14 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:40,193 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 212.0) internal successors, (2968), 14 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:40,193 INFO L175 Difference]: Start difference. First operand has 143 places, 273 transitions, 3501 flow. Second operand 13 states and 1459 transitions. [2023-09-01 13:25:40,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 900 transitions, 12321 flow [2023-09-01 13:25:44,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 900 transitions, 12068 flow, removed 87 selfloop flow, removed 1 redundant places. [2023-09-01 13:25:44,071 INFO L231 Difference]: Finished difference. Result has 161 places, 372 transitions, 5050 flow [2023-09-01 13:25:44,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5050, PETRI_PLACES=161, PETRI_TRANSITIONS=372} [2023-09-01 13:25:44,071 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2023-09-01 13:25:44,072 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 372 transitions, 5050 flow [2023-09-01 13:25:44,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:44,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:25:44,072 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:25:44,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 13:25:44,272 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,SelfDestructingSolverStorable25 [2023-09-01 13:25:44,273 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:25:44,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:25:44,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2081496792, now seen corresponding path program 6 times [2023-09-01 13:25:44,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:25:44,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386750474] [2023-09-01 13:25:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:25:44,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:25:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:25:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:44,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:25:44,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386750474] [2023-09-01 13:25:44,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386750474] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:25:44,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16645181] [2023-09-01 13:25:44,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:25:44,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:25:44,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:25:44,349 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:25:44,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:25:44,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:25:44,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:25:44,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:25:44,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:25:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:44,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:25:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:25:44,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16645181] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:25:44,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:25:44,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 13:25:44,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479490584] [2023-09-01 13:25:44,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:25:44,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 13:25:44,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:25:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 13:25:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:25:44,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:25:44,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 372 transitions, 5050 flow. Second operand has 13 states, 13 states have (on average 100.15384615384616) internal successors, (1302), 13 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:44,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:25:44,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:25:44,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:25:55,379 INFO L130 PetriNetUnfolder]: 55320/75974 cut-off events. [2023-09-01 13:25:55,379 INFO L131 PetriNetUnfolder]: For 974343/1006837 co-relation queries the response was YES. [2023-09-01 13:25:56,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481478 conditions, 75974 events. 55320/75974 cut-off events. For 974343/1006837 co-relation queries the response was YES. Maximal size of possible extension queue 3587. Compared 506851 event pairs, 13827 based on Foata normal form. 15177/90969 useless extension candidates. Maximal degree in co-relation 422526. Up to 57946 conditions per place. [2023-09-01 13:25:56,472 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 691 selfloop transitions, 103 changer transitions 0/802 dead transitions. [2023-09-01 13:25:56,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 802 transitions, 11760 flow [2023-09-01 13:25:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:25:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:25:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1222 transitions. [2023-09-01 13:25:56,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240137221269296 [2023-09-01 13:25:56,474 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1222 transitions. [2023-09-01 13:25:56,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1222 transitions. [2023-09-01 13:25:56,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:25:56,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1222 transitions. [2023-09-01 13:25:56,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 111.0909090909091) internal successors, (1222), 11 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:56,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:56,477 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:25:56,477 INFO L175 Difference]: Start difference. First operand has 161 places, 372 transitions, 5050 flow. Second operand 11 states and 1222 transitions. [2023-09-01 13:25:56,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 802 transitions, 11760 flow [2023-09-01 13:26:02,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 802 transitions, 11424 flow, removed 99 selfloop flow, removed 5 redundant places. [2023-09-01 13:26:02,775 INFO L231 Difference]: Finished difference. Result has 171 places, 427 transitions, 5892 flow [2023-09-01 13:26:02,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=4749, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5892, PETRI_PLACES=171, PETRI_TRANSITIONS=427} [2023-09-01 13:26:02,776 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 133 predicate places. [2023-09-01 13:26:02,776 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 427 transitions, 5892 flow [2023-09-01 13:26:02,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.15384615384616) internal successors, (1302), 13 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:02,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:02,776 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:02,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:02,977 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,SelfDestructingSolverStorable26 [2023-09-01 13:26:02,977 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:26:02,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:02,978 INFO L85 PathProgramCache]: Analyzing trace with hash 219334723, now seen corresponding path program 7 times [2023-09-01 13:26:02,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:02,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055753964] [2023-09-01 13:26:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:02,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:03,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:03,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055753964] [2023-09-01 13:26:03,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055753964] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:03,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191623298] [2023-09-01 13:26:03,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:26:03,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:03,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:03,044 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:03,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:26:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:03,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:26:03,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:03,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:03,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191623298] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:03,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:03,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 13:26:03,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595012436] [2023-09-01 13:26:03,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:03,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:26:03,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:03,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:26:03,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:26:03,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:26:03,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 427 transitions, 5892 flow. Second operand has 12 states, 12 states have (on average 99.83333333333333) internal successors, (1198), 12 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) [2023-09-01 13:26:03,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:03,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:26:03,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:16,299 INFO L130 PetriNetUnfolder]: 61521/85623 cut-off events. [2023-09-01 13:26:16,299 INFO L131 PetriNetUnfolder]: For 1297055/1334172 co-relation queries the response was YES. [2023-09-01 13:26:17,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573590 conditions, 85623 events. 61521/85623 cut-off events. For 1297055/1334172 co-relation queries the response was YES. Maximal size of possible extension queue 4184. Compared 604658 event pairs, 10504 based on Foata normal form. 16393/101726 useless extension candidates. Maximal degree in co-relation 503489. Up to 29926 conditions per place. [2023-09-01 13:26:17,553 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1284 selfloop transitions, 171 changer transitions 13/1476 dead transitions. [2023-09-01 13:26:17,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1476 transitions, 21403 flow [2023-09-01 13:26:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 13:26:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 13:26:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1996 transitions. [2023-09-01 13:26:17,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230607966457023 [2023-09-01 13:26:17,555 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1996 transitions. [2023-09-01 13:26:17,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1996 transitions. [2023-09-01 13:26:17,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:17,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1996 transitions. [2023-09-01 13:26:17,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.88888888888889) internal successors, (1996), 18 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:17,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:17,561 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:17,562 INFO L175 Difference]: Start difference. First operand has 171 places, 427 transitions, 5892 flow. Second operand 18 states and 1996 transitions. [2023-09-01 13:26:17,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1476 transitions, 21403 flow [2023-09-01 13:26:26,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 1476 transitions, 20887 flow, removed 245 selfloop flow, removed 2 redundant places. [2023-09-01 13:26:26,818 INFO L231 Difference]: Finished difference. Result has 192 places, 492 transitions, 6725 flow [2023-09-01 13:26:26,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6725, PETRI_PLACES=192, PETRI_TRANSITIONS=492} [2023-09-01 13:26:26,819 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 154 predicate places. [2023-09-01 13:26:26,819 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 492 transitions, 6725 flow [2023-09-01 13:26:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.83333333333333) internal successors, (1198), 12 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) [2023-09-01 13:26:26,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:26,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:26,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:27,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:27,025 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:26:27,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:27,026 INFO L85 PathProgramCache]: Analyzing trace with hash -953766959, now seen corresponding path program 8 times [2023-09-01 13:26:27,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:27,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297257571] [2023-09-01 13:26:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:27,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:27,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297257571] [2023-09-01 13:26:27,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297257571] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688572166] [2023-09-01 13:26:27,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:26:27,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:27,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:27,109 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:27,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:26:27,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:26:27,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:27,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:26:27,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:27,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:27,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688572166] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:27,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:27,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 13:26:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245106341] [2023-09-01 13:26:27,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 13:26:27,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 13:26:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:26:27,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:26:27,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 492 transitions, 6725 flow. Second operand has 13 states, 13 states have (on average 100.3076923076923) internal successors, (1304), 13 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:27,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:27,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:26:27,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:26:40,963 INFO L130 PetriNetUnfolder]: 60289/83939 cut-off events. [2023-09-01 13:26:40,964 INFO L131 PetriNetUnfolder]: For 1330333/1365514 co-relation queries the response was YES. [2023-09-01 13:26:41,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566957 conditions, 83939 events. 60289/83939 cut-off events. For 1330333/1365514 co-relation queries the response was YES. Maximal size of possible extension queue 4059. Compared 591297 event pairs, 13863 based on Foata normal form. 15035/98547 useless extension candidates. Maximal degree in co-relation 546224. Up to 40901 conditions per place. [2023-09-01 13:26:42,276 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1088 selfloop transitions, 156 changer transitions 52/1304 dead transitions. [2023-09-01 13:26:42,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1304 transitions, 18926 flow [2023-09-01 13:26:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 13:26:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 13:26:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1985 transitions. [2023-09-01 13:26:42,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201781970649895 [2023-09-01 13:26:42,278 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1985 transitions. [2023-09-01 13:26:42,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1985 transitions. [2023-09-01 13:26:42,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:26:42,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1985 transitions. [2023-09-01 13:26:42,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.27777777777777) internal successors, (1985), 18 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:42,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:42,283 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:42,283 INFO L175 Difference]: Start difference. First operand has 192 places, 492 transitions, 6725 flow. Second operand 18 states and 1985 transitions. [2023-09-01 13:26:42,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1304 transitions, 18926 flow [2023-09-01 13:26:54,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1304 transitions, 18628 flow, removed 96 selfloop flow, removed 6 redundant places. [2023-09-01 13:26:54,149 INFO L231 Difference]: Finished difference. Result has 205 places, 497 transitions, 6863 flow [2023-09-01 13:26:54,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6863, PETRI_PLACES=205, PETRI_TRANSITIONS=497} [2023-09-01 13:26:54,151 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 167 predicate places. [2023-09-01 13:26:54,151 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 497 transitions, 6863 flow [2023-09-01 13:26:54,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.3076923076923) internal successors, (1304), 13 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:54,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:26:54,151 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:26:54,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:26:54,357 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,SelfDestructingSolverStorable28 [2023-09-01 13:26:54,357 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 13:26:54,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:26:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1142683924, now seen corresponding path program 9 times [2023-09-01 13:26:54,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:26:54,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631330218] [2023-09-01 13:26:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:26:54,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:26:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:26:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:54,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:26:54,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631330218] [2023-09-01 13:26:54,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631330218] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:26:54,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514407302] [2023-09-01 13:26:54,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:26:54,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:26:54,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:26:54,440 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:26:54,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:26:54,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:26:54,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:26:54,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:26:54,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:26:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:54,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:26:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:26:54,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514407302] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:26:54,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:26:54,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 13:26:54,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747843891] [2023-09-01 13:26:54,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:26:54,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:26:54,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:26:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:26:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:26:54,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-09-01 13:26:54,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 497 transitions, 6863 flow. Second operand has 12 states, 12 states have (on average 100.66666666666667) internal successors, (1208), 12 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:26:54,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:26:54,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-09-01 13:26:54,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand