./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.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/parallel-parallel-sum-2.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 c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --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 12:55:55,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:55:55,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:55:55,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:55:55,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:55:55,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:55:55,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:55:55,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:55:55,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:55:55,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:55:55,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:55:55,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:55:55,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:55:55,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:55:55,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:55:55,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:55:55,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:55:55,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:55:55,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:55:55,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:55:55,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:55:55,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:55:55,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:55:55,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:55:55,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:55:55,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:55:55,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:55:55,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:55:55,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:55:55,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:55:55,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:55:55,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:55:55,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:55:55,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:55:55,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:55:55,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:55:55,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:55:55,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:55:55,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:55:55,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:55:55,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:55:55,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:55:55,794 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:55:55,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:55:55,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:55:55,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:55:55,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:55:55,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:55:55,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:55:55,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:55:55,798 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:55:55,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:55:55,799 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:55:55,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:55:55,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:55:55,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:55:55,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:55:55,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:55:55,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:55:55,800 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:55:55,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:55:55,800 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:55:55,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:55:55,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:55:55,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:55:55,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:55:55,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:55:55,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:55:55,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:55:55,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:55:55,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:55:55,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:55:55,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:55:55,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:55:55,802 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:55:55,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:55:55,803 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:55:55,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:55:56,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:55:56,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:55:56,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:55:56,129 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:55:56,129 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:55:56,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-09-01 12:55:57,258 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:55:57,469 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:55:57,471 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-09-01 12:55:57,479 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12e82454f/e9e5178d7beb4f6bb76fcda98fb5e978/FLAG5ab901677 [2023-09-01 12:55:57,490 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12e82454f/e9e5178d7beb4f6bb76fcda98fb5e978 [2023-09-01 12:55:57,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:55:57,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:55:57,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:55:57,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:55:57,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:55:57,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5990fd3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57, skipping insertion in model container [2023-09-01 12:55:57,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:55:57,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:55:57,658 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-09-01 12:55:57,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:55:57,674 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:55:57,701 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-09-01 12:55:57,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:55:57,712 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:55:57,712 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:55:57,718 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:55:57,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57 WrapperNode [2023-09-01 12:55:57,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:55:57,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:55:57,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:55:57,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:55:57,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,771 INFO L138 Inliner]: procedures = 29, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 403 [2023-09-01 12:55:57,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:55:57,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:55:57,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:55:57,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:55:57,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,806 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:55:57,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:55:57,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:55:57,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:55:57,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (1/1) ... [2023-09-01 12:55:57,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:55:57,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:55:57,862 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 12:55:57,890 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 12:55:57,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:55:57,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:55:57,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:55:57,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:55:57,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:55:57,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:55:57,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:55:57,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:55:57,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:55:57,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:55:57,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 12:55:57,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 12:55:57,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:55:57,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-09-01 12:55:57,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-09-01 12:55:57,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-09-01 12:55:57,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-09-01 12:55:57,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 12:55:57,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 12:55:57,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:55:57,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:55:57,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:55:57,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:55:57,912 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 12:55:58,096 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:55:58,098 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:55:58,573 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:55:58,768 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:55:58,769 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 12:55:58,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:55:58 BoogieIcfgContainer [2023-09-01 12:55:58,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:55:58,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:55:58,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:55:58,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:55:58,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:55:57" (1/3) ... [2023-09-01 12:55:58,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc2983f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:55:58, skipping insertion in model container [2023-09-01 12:55:58,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:55:57" (2/3) ... [2023-09-01 12:55:58,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc2983f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:55:58, skipping insertion in model container [2023-09-01 12:55:58,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:55:58" (3/3) ... [2023-09-01 12:55:58,778 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2023-09-01 12:55:58,785 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:55:58,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:55:58,793 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:55:58,793 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:55:58,920 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-09-01 12:55:58,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 306 places, 310 transitions, 692 flow [2023-09-01 12:55:59,098 INFO L130 PetriNetUnfolder]: 21/266 cut-off events. [2023-09-01 12:55:59,099 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 12:55:59,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 266 events. 21/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 309 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 228. Up to 3 conditions per place. [2023-09-01 12:55:59,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 310 transitions, 692 flow [2023-09-01 12:55:59,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 258 transitions, 564 flow [2023-09-01 12:55:59,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:55:59,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 258 transitions, 564 flow [2023-09-01 12:55:59,140 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 258 transitions, 564 flow [2023-09-01 12:55:59,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 258 transitions, 564 flow [2023-09-01 12:55:59,193 INFO L130 PetriNetUnfolder]: 21/258 cut-off events. [2023-09-01 12:55:59,194 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 12:55:59,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 258 events. 21/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 306 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 228. Up to 3 conditions per place. [2023-09-01 12:55:59,203 INFO L119 LiptonReduction]: Number of co-enabled transitions 8992 [2023-09-01 12:56:06,553 INFO L134 LiptonReduction]: Checked pairs total: 29590 [2023-09-01 12:56:06,553 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-09-01 12:56:06,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:56:06,575 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;@37e9315d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:56:06,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-09-01 12:56:06,586 INFO L130 PetriNetUnfolder]: 9/60 cut-off events. [2023-09-01 12:56:06,587 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 12:56:06,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:56:06,588 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, 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 12:56:06,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-09-01 12:56:06,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:56:06,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1294203465, now seen corresponding path program 1 times [2023-09-01 12:56:06,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:56:06,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405086003] [2023-09-01 12:56:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:06,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:56:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:07,285 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 12:56:07,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:56:07,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405086003] [2023-09-01 12:56:07,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405086003] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:56:07,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:56:07,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:56:07,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654027161] [2023-09-01 12:56:07,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:56:07,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:56:07,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:56:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:56:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:56:07,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 551 [2023-09-01 12:56:07,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 263.5) internal successors, (1054), 4 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:07,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:56:07,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 551 [2023-09-01 12:56:07,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:56:08,249 INFO L130 PetriNetUnfolder]: 4669/6705 cut-off events. [2023-09-01 12:56:08,251 INFO L131 PetriNetUnfolder]: For 1489/1489 co-relation queries the response was YES. [2023-09-01 12:56:08,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14639 conditions, 6705 events. 4669/6705 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 31411 event pairs, 3014 based on Foata normal form. 36/4933 useless extension candidates. Maximal degree in co-relation 7761. Up to 3367 conditions per place. [2023-09-01 12:56:08,279 INFO L137 encePairwiseOnDemand]: 545/551 looper letters, 38 selfloop transitions, 2 changer transitions 31/93 dead transitions. [2023-09-01 12:56:08,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 421 flow [2023-09-01 12:56:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:56:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:56:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1098 transitions. [2023-09-01 12:56:08,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981851179673321 [2023-09-01 12:56:08,300 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1098 transitions. [2023-09-01 12:56:08,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1098 transitions. [2023-09-01 12:56:08,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:56:08,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1098 transitions. [2023-09-01 12:56:08,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.5) internal successors, (1098), 4 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:08,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:08,321 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:08,323 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 170 flow. Second operand 4 states and 1098 transitions. [2023-09-01 12:56:08,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 421 flow [2023-09-01 12:56:08,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 359 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 12:56:08,416 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 156 flow [2023-09-01 12:56:08,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-09-01 12:56:08,420 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-09-01 12:56:08,421 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 156 flow [2023-09-01 12:56:08,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 263.5) internal successors, (1054), 4 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:08,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:56:08,432 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, 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 12:56:08,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:56:08,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-09-01 12:56:08,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:56:08,433 INFO L85 PathProgramCache]: Analyzing trace with hash 117533720, now seen corresponding path program 1 times [2023-09-01 12:56:08,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:56:08,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548648935] [2023-09-01 12:56:08,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:08,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:56:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:09,185 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 12:56:09,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:56:09,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548648935] [2023-09-01 12:56:09,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548648935] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:56:09,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956434021] [2023-09-01 12:56:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:09,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:09,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:56:09,193 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 12:56:09,217 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 12:56:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:56:09,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:56:10,063 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 12:56:10,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:56:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:56:10,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956434021] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:56:10,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:56:10,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 13 [2023-09-01 12:56:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318640900] [2023-09-01 12:56:10,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:56:10,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:56:10,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:56:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:56:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:56:10,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 551 [2023-09-01 12:56:10,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:10,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:56:10,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 551 [2023-09-01 12:56:10,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:56:11,280 INFO L130 PetriNetUnfolder]: 5283/7284 cut-off events. [2023-09-01 12:56:11,280 INFO L131 PetriNetUnfolder]: For 1133/1141 co-relation queries the response was YES. [2023-09-01 12:56:11,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15431 conditions, 7284 events. 5283/7284 cut-off events. For 1133/1141 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 31914 event pairs, 2115 based on Foata normal form. 5/5876 useless extension candidates. Maximal degree in co-relation 15419. Up to 4193 conditions per place. [2023-09-01 12:56:11,318 INFO L137 encePairwiseOnDemand]: 543/551 looper letters, 81 selfloop transitions, 8 changer transitions 9/120 dead transitions. [2023-09-01 12:56:11,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 504 flow [2023-09-01 12:56:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:56:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:56:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1338 transitions. [2023-09-01 12:56:11,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48566243194192377 [2023-09-01 12:56:11,322 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1338 transitions. [2023-09-01 12:56:11,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1338 transitions. [2023-09-01 12:56:11,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:56:11,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1338 transitions. [2023-09-01 12:56:11,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:11,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:11,332 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:11,332 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 156 flow. Second operand 5 states and 1338 transitions. [2023-09-01 12:56:11,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 504 flow [2023-09-01 12:56:11,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 494 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 12:56:11,342 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 211 flow [2023-09-01 12:56:11,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-09-01 12:56:11,343 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-09-01 12:56:11,344 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 211 flow [2023-09-01 12:56:11,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:11,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:56:11,345 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, 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 12:56:11,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:56:11,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:11,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-09-01 12:56:11,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:56:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash 918312716, now seen corresponding path program 2 times [2023-09-01 12:56:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:56:11,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016307112] [2023-09-01 12:56:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:56:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:12,163 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 12:56:12,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:56:12,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016307112] [2023-09-01 12:56:12,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016307112] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:56:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976911771] [2023-09-01 12:56:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:56:12,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:12,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:56:12,166 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 12:56:12,176 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 12:56:12,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:56:12,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:56:12,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 12:56:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:56:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:56:12,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:56:12,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976911771] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:56:12,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:56:12,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-09-01 12:56:12,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545087034] [2023-09-01 12:56:12,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:56:12,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:56:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:56:12,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:56:12,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:56:12,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 551 [2023-09-01 12:56:12,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 260.1666666666667) internal successors, (1561), 6 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:12,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:56:12,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 551 [2023-09-01 12:56:12,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:56:13,988 INFO L130 PetriNetUnfolder]: 7715/10366 cut-off events. [2023-09-01 12:56:13,989 INFO L131 PetriNetUnfolder]: For 4941/4993 co-relation queries the response was YES. [2023-09-01 12:56:13,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25631 conditions, 10366 events. 7715/10366 cut-off events. For 4941/4993 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 46113 event pairs, 2067 based on Foata normal form. 31/9569 useless extension candidates. Maximal degree in co-relation 25617. Up to 3712 conditions per place. [2023-09-01 12:56:14,041 INFO L137 encePairwiseOnDemand]: 542/551 looper letters, 106 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2023-09-01 12:56:14,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 149 transitions, 690 flow [2023-09-01 12:56:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:56:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:56:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1655 transitions. [2023-09-01 12:56:14,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500604960677556 [2023-09-01 12:56:14,046 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1655 transitions. [2023-09-01 12:56:14,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1655 transitions. [2023-09-01 12:56:14,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:56:14,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1655 transitions. [2023-09-01 12:56:14,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 275.8333333333333) internal successors, (1655), 6 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:14,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:14,065 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:14,065 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 211 flow. Second operand 6 states and 1655 transitions. [2023-09-01 12:56:14,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 149 transitions, 690 flow [2023-09-01 12:56:14,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 149 transitions, 670 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 12:56:14,090 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 267 flow [2023-09-01 12:56:14,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-09-01 12:56:14,092 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-09-01 12:56:14,092 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 267 flow [2023-09-01 12:56:14,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.1666666666667) internal successors, (1561), 6 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:14,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:56:14,097 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, 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 12:56:14,105 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 12:56:14,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 12:56:14,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-09-01 12:56:14,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:56:14,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1783620550, now seen corresponding path program 1 times [2023-09-01 12:56:14,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:56:14,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952635925] [2023-09-01 12:56:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:14,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:56:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:56:14,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:56:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952635925] [2023-09-01 12:56:14,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952635925] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:56:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517414871] [2023-09-01 12:56:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:14,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:14,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:56:14,657 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 12:56:14,659 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 12:56:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:14,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 12:56:14,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:56:15,008 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 12:56:15,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:56:15,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517414871] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:56:15,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:56:15,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-09-01 12:56:15,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823219383] [2023-09-01 12:56:15,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:56:15,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:56:15,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:56:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:56:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:56:15,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 551 [2023-09-01 12:56:15,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:15,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:56:15,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 551 [2023-09-01 12:56:15,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:56:16,541 INFO L130 PetriNetUnfolder]: 11863/15713 cut-off events. [2023-09-01 12:56:16,541 INFO L131 PetriNetUnfolder]: For 8889/9087 co-relation queries the response was YES. [2023-09-01 12:56:16,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39689 conditions, 15713 events. 11863/15713 cut-off events. For 8889/9087 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 72010 event pairs, 2155 based on Foata normal form. 164/14651 useless extension candidates. Maximal degree in co-relation 39666. Up to 7293 conditions per place. [2023-09-01 12:56:16,621 INFO L137 encePairwiseOnDemand]: 545/551 looper letters, 96 selfloop transitions, 11 changer transitions 2/131 dead transitions. [2023-09-01 12:56:16,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 131 transitions, 648 flow [2023-09-01 12:56:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:56:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:56:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1135 transitions. [2023-09-01 12:56:16,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51497277676951 [2023-09-01 12:56:16,625 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1135 transitions. [2023-09-01 12:56:16,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1135 transitions. [2023-09-01 12:56:16,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:56:16,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1135 transitions. [2023-09-01 12:56:16,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:16,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:16,634 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:16,634 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 267 flow. Second operand 4 states and 1135 transitions. [2023-09-01 12:56:16,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 131 transitions, 648 flow [2023-09-01 12:56:16,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 131 transitions, 635 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 12:56:16,676 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 301 flow [2023-09-01 12:56:16,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2023-09-01 12:56:16,678 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-09-01 12:56:16,678 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 301 flow [2023-09-01 12:56:16,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:16,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:56:16,680 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, 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 12:56:16,689 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 12:56:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:16,890 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-09-01 12:56:16,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:56:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1944478364, now seen corresponding path program 1 times [2023-09-01 12:56:16,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:56:16,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398694540] [2023-09-01 12:56:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:56:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:56:17,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:56:17,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398694540] [2023-09-01 12:56:17,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398694540] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:56:17,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345713170] [2023-09-01 12:56:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:17,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:17,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:56:17,209 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 12:56:17,212 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 12:56:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 12:56:17,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:56:17,557 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 12:56:17,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:56:17,640 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 12:56:17,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345713170] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:56:17,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:56:17,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-09-01 12:56:17,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284211435] [2023-09-01 12:56:17,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:56:17,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:56:17,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:56:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:56:17,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:56:17,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 551 [2023-09-01 12:56:17,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 301 flow. Second operand has 9 states, 9 states have (on average 262.77777777777777) internal successors, (2365), 9 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:17,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:56:17,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 551 [2023-09-01 12:56:17,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:56:19,778 INFO L130 PetriNetUnfolder]: 15199/20692 cut-off events. [2023-09-01 12:56:19,778 INFO L131 PetriNetUnfolder]: For 25443/25613 co-relation queries the response was YES. [2023-09-01 12:56:19,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52360 conditions, 20692 events. 15199/20692 cut-off events. For 25443/25613 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 105822 event pairs, 2824 based on Foata normal form. 1074/20023 useless extension candidates. Maximal degree in co-relation 49911. Up to 10211 conditions per place. [2023-09-01 12:56:19,868 INFO L137 encePairwiseOnDemand]: 542/551 looper letters, 122 selfloop transitions, 18 changer transitions 68/230 dead transitions. [2023-09-01 12:56:19,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 230 transitions, 1136 flow [2023-09-01 12:56:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:56:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:56:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2996 transitions. [2023-09-01 12:56:19,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943078699884508 [2023-09-01 12:56:19,875 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2996 transitions. [2023-09-01 12:56:19,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2996 transitions. [2023-09-01 12:56:19,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:56:19,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2996 transitions. [2023-09-01 12:56:19,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 272.3636363636364) internal successors, (2996), 11 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:19,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 551.0) internal successors, (6612), 12 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:19,891 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 551.0) internal successors, (6612), 12 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:19,891 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 301 flow. Second operand 11 states and 2996 transitions. [2023-09-01 12:56:19,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 230 transitions, 1136 flow [2023-09-01 12:56:19,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 230 transitions, 1120 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:56:19,909 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 356 flow [2023-09-01 12:56:19,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=356, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2023-09-01 12:56:19,912 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-09-01 12:56:19,913 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 356 flow [2023-09-01 12:56:19,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 262.77777777777777) internal successors, (2365), 9 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:19,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:56:19,914 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, 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, 1] [2023-09-01 12:56:19,923 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 12:56:20,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:20,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-09-01 12:56:20,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:56:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -501703849, now seen corresponding path program 1 times [2023-09-01 12:56:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:56:20,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7004020] [2023-09-01 12:56:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:20,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:56:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:56:21,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:56:21,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7004020] [2023-09-01 12:56:21,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7004020] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:56:21,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427584795] [2023-09-01 12:56:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:21,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:56:21,409 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 12:56:21,437 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 12:56:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:21,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 74 conjunts are in the unsatisfiable core [2023-09-01 12:56:21,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:56:22,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 12:56:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:56:22,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:56:22,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:56:22,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-09-01 12:56:22,414 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:56:22,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2023-09-01 12:56:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:56:22,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427584795] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:56:22,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:56:22,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-09-01 12:56:22,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250564450] [2023-09-01 12:56:22,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:56:22,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:56:22,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:56:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:56:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:56:23,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 551 [2023-09-01 12:56:23,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 356 flow. Second operand has 18 states, 18 states have (on average 237.72222222222223) internal successors, (4279), 18 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:23,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:56:23,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 551 [2023-09-01 12:56:23,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:56:32,039 INFO L130 PetriNetUnfolder]: 65456/87003 cut-off events. [2023-09-01 12:56:32,039 INFO L131 PetriNetUnfolder]: For 89558/90137 co-relation queries the response was YES. [2023-09-01 12:56:32,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233976 conditions, 87003 events. 65456/87003 cut-off events. For 89558/90137 co-relation queries the response was YES. Maximal size of possible extension queue 1776. Compared 490236 event pairs, 6868 based on Foata normal form. 1980/82979 useless extension candidates. Maximal degree in co-relation 233961. Up to 13423 conditions per place. [2023-09-01 12:56:32,634 INFO L137 encePairwiseOnDemand]: 537/551 looper letters, 647 selfloop transitions, 170 changer transitions 81/915 dead transitions. [2023-09-01 12:56:32,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 915 transitions, 5169 flow [2023-09-01 12:56:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 12:56:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 12:56:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 9409 transitions. [2023-09-01 12:56:32,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4615195958208662 [2023-09-01 12:56:32,654 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 9409 transitions. [2023-09-01 12:56:32,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 9409 transitions. [2023-09-01 12:56:32,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:56:32,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 9409 transitions. [2023-09-01 12:56:32,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 254.2972972972973) internal successors, (9409), 37 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:32,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 551.0) internal successors, (20938), 38 states have internal predecessors, (20938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:32,705 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 551.0) internal successors, (20938), 38 states have internal predecessors, (20938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:32,705 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 356 flow. Second operand 37 states and 9409 transitions. [2023-09-01 12:56:32,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 915 transitions, 5169 flow [2023-09-01 12:56:32,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 915 transitions, 5001 flow, removed 73 selfloop flow, removed 3 redundant places. [2023-09-01 12:56:32,909 INFO L231 Difference]: Finished difference. Result has 138 places, 258 transitions, 1990 flow [2023-09-01 12:56:32,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1990, PETRI_PLACES=138, PETRI_TRANSITIONS=258} [2023-09-01 12:56:32,910 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 67 predicate places. [2023-09-01 12:56:32,910 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 258 transitions, 1990 flow [2023-09-01 12:56:32,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 237.72222222222223) internal successors, (4279), 18 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:32,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:56:32,912 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, 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, 1] [2023-09-01 12:56:32,927 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 12:56:33,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:33,117 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-09-01 12:56:33,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:56:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash 598885593, now seen corresponding path program 1 times [2023-09-01 12:56:33,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:56:33,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800896433] [2023-09-01 12:56:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:33,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:56:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:56:34,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:56:34,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800896433] [2023-09-01 12:56:34,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800896433] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:56:34,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007718279] [2023-09-01 12:56:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:34,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:34,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:56:34,417 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 12:56:34,420 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 12:56:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 87 conjunts are in the unsatisfiable core [2023-09-01 12:56:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:56:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:56:35,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:56:35,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 12:56:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:56:35,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:56:35,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:56:35,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 46 [2023-09-01 12:56:35,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2023-09-01 12:56:35,907 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 12:56:35,913 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 12:56:35,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 12:56:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:56:36,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007718279] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:56:36,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:56:36,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-09-01 12:56:36,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444238880] [2023-09-01 12:56:36,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:56:36,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:56:36,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:56:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:56:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=764, Unknown=1, NotChecked=0, Total=870 [2023-09-01 12:56:37,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 551 [2023-09-01 12:56:37,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 258 transitions, 1990 flow. Second operand has 30 states, 30 states have (on average 202.16666666666666) internal successors, (6065), 30 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:37,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:56:37,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 551 [2023-09-01 12:56:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:56:44,819 WARN L222 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 73 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:56:51,184 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 67 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:57:41,146 INFO L130 PetriNetUnfolder]: 198339/260446 cut-off events. [2023-09-01 12:57:41,147 INFO L131 PetriNetUnfolder]: For 448863/449051 co-relation queries the response was YES. [2023-09-01 12:57:42,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773051 conditions, 260446 events. 198339/260446 cut-off events. For 448863/449051 co-relation queries the response was YES. Maximal size of possible extension queue 5003. Compared 1607414 event pairs, 11227 based on Foata normal form. 965/244704 useless extension candidates. Maximal degree in co-relation 773014. Up to 28741 conditions per place. [2023-09-01 12:57:43,207 INFO L137 encePairwiseOnDemand]: 534/551 looper letters, 2102 selfloop transitions, 822 changer transitions 276/3211 dead transitions. [2023-09-01 12:57:43,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 3211 transitions, 21363 flow [2023-09-01 12:57:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-09-01 12:57:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2023-09-01 12:57:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 30132 transitions. [2023-09-01 12:57:43,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39627554643730767 [2023-09-01 12:57:43,254 INFO L72 ComplementDD]: Start complementDD. Operand 138 states and 30132 transitions. [2023-09-01 12:57:43,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 30132 transitions. [2023-09-01 12:57:43,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:43,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 138 states and 30132 transitions. [2023-09-01 12:57:43,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 139 states, 138 states have (on average 218.34782608695653) internal successors, (30132), 138 states have internal predecessors, (30132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:43,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 139 states, 139 states have (on average 551.0) internal successors, (76589), 139 states have internal predecessors, (76589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:43,406 INFO L81 ComplementDD]: Finished complementDD. Result has 139 states, 139 states have (on average 551.0) internal successors, (76589), 139 states have internal predecessors, (76589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:43,407 INFO L175 Difference]: Start difference. First operand has 138 places, 258 transitions, 1990 flow. Second operand 138 states and 30132 transitions. [2023-09-01 12:57:43,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 3211 transitions, 21363 flow [2023-09-01 12:57:55,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 3211 transitions, 19833 flow, removed 649 selfloop flow, removed 14 redundant places. [2023-09-01 12:57:55,171 INFO L231 Difference]: Finished difference. Result has 344 places, 962 transitions, 9283 flow [2023-09-01 12:57:55,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=9283, PETRI_PLACES=344, PETRI_TRANSITIONS=962} [2023-09-01 12:57:55,172 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 273 predicate places. [2023-09-01 12:57:55,172 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 962 transitions, 9283 flow [2023-09-01 12:57:55,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 202.16666666666666) internal successors, (6065), 30 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:55,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:55,174 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, 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, 1] [2023-09-01 12:57:55,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:57:55,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:55,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-09-01 12:57:55,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1453018889, now seen corresponding path program 1 times [2023-09-01 12:57:55,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:55,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689465371] [2023-09-01 12:57:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:55,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:56,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:56,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689465371] [2023-09-01 12:57:56,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689465371] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:56,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804370779] [2023-09-01 12:57:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:56,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:56,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:56,537 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 12:57:56,562 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 12:57:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 74 conjunts are in the unsatisfiable core [2023-09-01 12:57:56,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:57,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 12:57:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:57:57,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:57,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:57,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-09-01 12:57:57,586 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:57:57,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2023-09-01 12:57:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:57:57,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804370779] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:57:57,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:57:57,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-09-01 12:57:57,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819028772] [2023-09-01 12:57:57,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:57:57,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:57:57,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:57:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:57:59,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 551 [2023-09-01 12:57:59,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 962 transitions, 9283 flow. Second operand has 18 states, 18 states have (on average 237.55555555555554) internal successors, (4276), 18 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:59,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:59,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 551 [2023-09-01 12:57:59,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand