./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.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-1.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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --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 12:48:54,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:48:54,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:48:54,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:48:54,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:48:54,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:48:54,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:48:54,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:48:54,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:48:54,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:48:54,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:48:54,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:48:54,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:48:54,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:48:54,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:48:54,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:48:54,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:48:54,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:48:54,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:48:54,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:48:54,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:48:54,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:48:54,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:48:54,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:48:54,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:48:54,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:48:54,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:48:54,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:48:54,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:48:54,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:48:54,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:48:54,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:48:54,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:48:54,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:48:54,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:48:54,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:48:54,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:48:54,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:48:54,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:48:54,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:48:54,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:48:54,855 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:48:54,885 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:48:54,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:48:54,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:48:54,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:48:54,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:48:54,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:48:54,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:48:54,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:48:54,888 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:48:54,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:48:54,889 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:48:54,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:48:54,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:48:54,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:48:54,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:48:54,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:48:54,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:48:54,891 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:48:54,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:48:54,891 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:48:54,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:48:54,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:48:54,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:48:54,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:48:54,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:48:54,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:48:54,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:48:54,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:48:54,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:48:54,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:48:54,894 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:48:54,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:48:54,894 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:48:54,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:48:54,895 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:48:54,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:48:55,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:48:55,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:48:55,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:48:55,273 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:48:55,273 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:48:55,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-09-01 12:48:56,403 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:48:56,574 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:48:56,574 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-09-01 12:48:56,580 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3281dc8a5/81f2f4ea7cb8428b9e72e8ba8494ff65/FLAG95b23e9bb [2023-09-01 12:48:56,592 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3281dc8a5/81f2f4ea7cb8428b9e72e8ba8494ff65 [2023-09-01 12:48:56,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:48:56,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:48:56,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:48:56,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:48:56,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:48:56,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:56,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bdb71d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56, skipping insertion in model container [2023-09-01 12:48:56,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:56,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:48:56,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:48:56,843 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-1.wvr.c[3642,3655] [2023-09-01 12:48:56,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:48:56,876 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:48:56,920 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-1.wvr.c[3642,3655] [2023-09-01 12:48:56,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:48:56,941 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:48:56,943 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:48:56,948 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:48:56,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56 WrapperNode [2023-09-01 12:48:56,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:48:56,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:48:56,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:48:56,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:48:56,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:56,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,030 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 311 [2023-09-01 12:48:57,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:48:57,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:48:57,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:48:57,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:48:57,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,085 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:48:57,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:48:57,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:48:57,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:48:57,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (1/1) ... [2023-09-01 12:48:57,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:48:57,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:48:57,124 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 12:48:57,148 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 12:48:57,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:48:57,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:48:57,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:48:57,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:48:57,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:48:57,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:48:57,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:48:57,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:48:57,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:48:57,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:48:57,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 12:48:57,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 12:48:57,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:48:57,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 12:48:57,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 12:48:57,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:48:57,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:48:57,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:48:57,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:48:57,179 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 12:48:57,306 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:48:57,315 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:48:57,738 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:48:57,937 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:48:57,937 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 12:48:57,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:48:57 BoogieIcfgContainer [2023-09-01 12:48:57,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:48:57,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:48:57,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:48:57,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:48:57,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:48:56" (1/3) ... [2023-09-01 12:48:57,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6555b466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:48:57, skipping insertion in model container [2023-09-01 12:48:57,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:48:56" (2/3) ... [2023-09-01 12:48:57,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6555b466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:48:57, skipping insertion in model container [2023-09-01 12:48:57,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:48:57" (3/3) ... [2023-09-01 12:48:57,949 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-09-01 12:48:57,957 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:48:57,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:48:57,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:48:57,966 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:48:58,052 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 12:48:58,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 206 transitions, 444 flow [2023-09-01 12:48:58,210 INFO L130 PetriNetUnfolder]: 15/202 cut-off events. [2023-09-01 12:48:58,210 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 12:48:58,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 202 events. 15/202 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 140 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-09-01 12:48:58,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 206 transitions, 444 flow [2023-09-01 12:48:58,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 190 transitions, 404 flow [2023-09-01 12:48:58,233 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:48:58,245 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 190 transitions, 404 flow [2023-09-01 12:48:58,247 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 190 transitions, 404 flow [2023-09-01 12:48:58,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 404 flow [2023-09-01 12:48:58,276 INFO L130 PetriNetUnfolder]: 15/190 cut-off events. [2023-09-01 12:48:58,276 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 12:48:58,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 190 events. 15/190 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 139 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-09-01 12:48:58,279 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-09-01 12:49:04,309 INFO L134 LiptonReduction]: Checked pairs total: 4288 [2023-09-01 12:49:04,309 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-09-01 12:49:04,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:49:04,337 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;@38443bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:49:04,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-09-01 12:49:04,349 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2023-09-01 12:49:04,350 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 12:49:04,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:04,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:04,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:49:04,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash 464994653, now seen corresponding path program 1 times [2023-09-01 12:49:04,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:04,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412104224] [2023-09-01 12:49:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:04,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:05,067 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 12:49:05,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:05,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412104224] [2023-09-01 12:49:05,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412104224] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:49:05,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:49:05,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 12:49:05,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607792174] [2023-09-01 12:49:05,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:49:05,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:49:05,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:49:05,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:49:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:49:05,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 400 [2023-09-01 12:49:05,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:05,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:49:05,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 400 [2023-09-01 12:49:05,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:49:05,479 INFO L130 PetriNetUnfolder]: 1952/2593 cut-off events. [2023-09-01 12:49:05,480 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2023-09-01 12:49:05,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2593 events. 1952/2593 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9346 event pairs, 624 based on Foata normal form. 1/1889 useless extension candidates. Maximal degree in co-relation 4200. Up to 1650 conditions per place. [2023-09-01 12:49:05,498 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 51 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2023-09-01 12:49:05,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 273 flow [2023-09-01 12:49:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:49:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:49:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2023-09-01 12:49:05,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48583333333333334 [2023-09-01 12:49:05,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2023-09-01 12:49:05,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2023-09-01 12:49:05,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:49:05,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2023-09-01 12:49:05,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:05,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:05,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:05,541 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 86 flow. Second operand 3 states and 583 transitions. [2023-09-01 12:49:05,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 273 flow [2023-09-01 12:49:05,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 12:49:05,551 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 103 flow [2023-09-01 12:49:05,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2023-09-01 12:49:05,557 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-09-01 12:49:05,560 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 103 flow [2023-09-01 12:49:05,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:05,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:05,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:05,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:49:05,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:49:05,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1582094128, now seen corresponding path program 1 times [2023-09-01 12:49:05,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:05,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581822756] [2023-09-01 12:49:05,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:05,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:49:05,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:05,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581822756] [2023-09-01 12:49:05,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581822756] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:49:05,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:49:05,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:49:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382415201] [2023-09-01 12:49:05,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:49:05,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:49:05,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:49:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:49:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:49:05,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-09-01 12:49:05,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:05,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:49:05,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-09-01 12:49:05,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:49:06,327 INFO L130 PetriNetUnfolder]: 2683/3652 cut-off events. [2023-09-01 12:49:06,327 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2023-09-01 12:49:06,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8759 conditions, 3652 events. 2683/3652 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13796 event pairs, 1920 based on Foata normal form. 1/2761 useless extension candidates. Maximal degree in co-relation 2969. Up to 2594 conditions per place. [2023-09-01 12:49:06,343 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 34 selfloop transitions, 2 changer transitions 26/62 dead transitions. [2023-09-01 12:49:06,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 302 flow [2023-09-01 12:49:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:49:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:49:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 747 transitions. [2023-09-01 12:49:06,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466875 [2023-09-01 12:49:06,346 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 747 transitions. [2023-09-01 12:49:06,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 747 transitions. [2023-09-01 12:49:06,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:49:06,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 747 transitions. [2023-09-01 12:49:06,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.75) internal successors, (747), 4 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:06,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:06,353 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:06,353 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 103 flow. Second operand 4 states and 747 transitions. [2023-09-01 12:49:06,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 302 flow [2023-09-01 12:49:06,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:49:06,357 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 116 flow [2023-09-01 12:49:06,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-09-01 12:49:06,358 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-09-01 12:49:06,358 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 116 flow [2023-09-01 12:49:06,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:06,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:06,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:06,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:49:06,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:49:06,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:06,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1000104662, now seen corresponding path program 1 times [2023-09-01 12:49:06,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:06,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45583113] [2023-09-01 12:49:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:06,564 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 12:49:06,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:06,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45583113] [2023-09-01 12:49:06,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45583113] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:49:06,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:49:06,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:49:06,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581531552] [2023-09-01 12:49:06,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:49:06,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:49:06,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:49:06,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:49:06,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:49:06,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 400 [2023-09-01 12:49:06,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:06,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:49:06,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 400 [2023-09-01 12:49:06,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:49:07,232 INFO L130 PetriNetUnfolder]: 4054/5356 cut-off events. [2023-09-01 12:49:07,232 INFO L131 PetriNetUnfolder]: For 1510/1510 co-relation queries the response was YES. [2023-09-01 12:49:07,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13107 conditions, 5356 events. 4054/5356 cut-off events. For 1510/1510 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21895 event pairs, 826 based on Foata normal form. 1/4625 useless extension candidates. Maximal degree in co-relation 13094. Up to 2129 conditions per place. [2023-09-01 12:49:07,265 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 84 selfloop transitions, 8 changer transitions 1/93 dead transitions. [2023-09-01 12:49:07,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 93 transitions, 472 flow [2023-09-01 12:49:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:49:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:49:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2023-09-01 12:49:07,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488125 [2023-09-01 12:49:07,268 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2023-09-01 12:49:07,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2023-09-01 12:49:07,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:49:07,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2023-09-01 12:49:07,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:07,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:07,276 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:07,276 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 116 flow. Second operand 4 states and 781 transitions. [2023-09-01 12:49:07,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 93 transitions, 472 flow [2023-09-01 12:49:07,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 93 transitions, 464 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 12:49:07,282 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 174 flow [2023-09-01 12:49:07,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-09-01 12:49:07,284 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-09-01 12:49:07,286 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 174 flow [2023-09-01 12:49:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:07,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:07,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:07,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:49:07,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:49:07,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1282271029, now seen corresponding path program 1 times [2023-09-01 12:49:07,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:07,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618074159] [2023-09-01 12:49:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:07,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:07,609 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 12:49:07,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:07,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618074159] [2023-09-01 12:49:07,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618074159] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:49:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535525317] [2023-09-01 12:49:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:07,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:07,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:49:07,617 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 12:49:07,656 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 12:49:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:07,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:49:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:49:07,958 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 12:49:07,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:49:08,015 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 12:49:08,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535525317] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:49:08,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:49:08,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2023-09-01 12:49:08,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605268208] [2023-09-01 12:49:08,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:49:08,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:49:08,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:49:08,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:49:08,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:49:08,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 400 [2023-09-01 12:49:08,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 174 flow. Second operand has 9 states, 9 states have (on average 176.11111111111111) internal successors, (1585), 9 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:08,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:49:08,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 400 [2023-09-01 12:49:08,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:49:09,304 INFO L130 PetriNetUnfolder]: 6835/9086 cut-off events. [2023-09-01 12:49:09,305 INFO L131 PetriNetUnfolder]: For 5784/5784 co-relation queries the response was YES. [2023-09-01 12:49:09,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25294 conditions, 9086 events. 6835/9086 cut-off events. For 5784/5784 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39953 event pairs, 328 based on Foata normal form. 134/9220 useless extension candidates. Maximal degree in co-relation 24836. Up to 4607 conditions per place. [2023-09-01 12:49:09,362 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 126 selfloop transitions, 23 changer transitions 36/185 dead transitions. [2023-09-01 12:49:09,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 185 transitions, 997 flow [2023-09-01 12:49:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:49:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:49:09,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2018 transitions. [2023-09-01 12:49:09,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586363636363636 [2023-09-01 12:49:09,369 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2018 transitions. [2023-09-01 12:49:09,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2018 transitions. [2023-09-01 12:49:09,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:49:09,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2018 transitions. [2023-09-01 12:49:09,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 183.45454545454547) internal successors, (2018), 11 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:09,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:09,384 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:09,384 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 174 flow. Second operand 11 states and 2018 transitions. [2023-09-01 12:49:09,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 185 transitions, 997 flow [2023-09-01 12:49:09,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 185 transitions, 969 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-09-01 12:49:09,407 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 352 flow [2023-09-01 12:49:09,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=352, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-09-01 12:49:09,408 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2023-09-01 12:49:09,408 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 352 flow [2023-09-01 12:49:09,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.11111111111111) internal successors, (1585), 9 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:09,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:09,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:09,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 12:49:09,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:09,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:49:09,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1124719134, now seen corresponding path program 1 times [2023-09-01 12:49:09,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:09,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273314144] [2023-09-01 12:49:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:09,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:10,733 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 12:49:10,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:10,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273314144] [2023-09-01 12:49:10,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273314144] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:49:10,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201925440] [2023-09-01 12:49:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:10,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:10,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:49:10,737 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 12:49:10,763 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 12:49:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:10,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:49:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:49:11,209 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 19 treesize of output 7 [2023-09-01 12:49:11,304 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 12:49:11,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:49:11,569 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 12:49:11,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201925440] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:49:11,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:49:11,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 22 [2023-09-01 12:49:11,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113408693] [2023-09-01 12:49:11,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:49:11,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 12:49:11,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:49:11,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 12:49:11,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:49:12,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 400 [2023-09-01 12:49:12,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 352 flow. Second operand has 23 states, 23 states have (on average 156.6086956521739) internal successors, (3602), 23 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:12,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:49:12,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 400 [2023-09-01 12:49:12,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:49:18,619 INFO L130 PetriNetUnfolder]: 36653/48434 cut-off events. [2023-09-01 12:49:18,619 INFO L131 PetriNetUnfolder]: For 54698/54698 co-relation queries the response was YES. [2023-09-01 12:49:18,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147025 conditions, 48434 events. 36653/48434 cut-off events. For 54698/54698 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 265481 event pairs, 1658 based on Foata normal form. 322/48756 useless extension candidates. Maximal degree in co-relation 112987. Up to 14938 conditions per place. [2023-09-01 12:49:18,904 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 438 selfloop transitions, 273 changer transitions 51/762 dead transitions. [2023-09-01 12:49:18,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 762 transitions, 5071 flow [2023-09-01 12:49:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 12:49:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 12:49:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5931 transitions. [2023-09-01 12:49:18,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42364285714285715 [2023-09-01 12:49:18,922 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5931 transitions. [2023-09-01 12:49:18,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5931 transitions. [2023-09-01 12:49:18,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:49:18,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5931 transitions. [2023-09-01 12:49:18,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 169.45714285714286) internal successors, (5931), 35 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:18,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 400.0) internal successors, (14400), 36 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:18,961 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 400.0) internal successors, (14400), 36 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:18,961 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 352 flow. Second operand 35 states and 5931 transitions. [2023-09-01 12:49:18,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 762 transitions, 5071 flow [2023-09-01 12:49:19,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 762 transitions, 4739 flow, removed 165 selfloop flow, removed 2 redundant places. [2023-09-01 12:49:19,105 INFO L231 Difference]: Finished difference. Result has 113 places, 385 transitions, 3471 flow [2023-09-01 12:49:19,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3471, PETRI_PLACES=113, PETRI_TRANSITIONS=385} [2023-09-01 12:49:19,106 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 74 predicate places. [2023-09-01 12:49:19,107 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 385 transitions, 3471 flow [2023-09-01 12:49:19,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 156.6086956521739) internal successors, (3602), 23 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:19,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:19,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:19,119 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 12:49:19,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:19,315 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:49:19,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:19,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1911556981, now seen corresponding path program 1 times [2023-09-01 12:49:19,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:19,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970974267] [2023-09-01 12:49:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:19,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:20,405 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 12:49:20,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970974267] [2023-09-01 12:49:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970974267] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:49:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018734566] [2023-09-01 12:49:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:20,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:20,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:49:20,408 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 12:49:20,437 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 12:49:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:20,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:49:20,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:49:20,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:49:20,739 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 18 treesize of output 20 [2023-09-01 12:49:20,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:49:20,800 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 23 treesize of output 15 [2023-09-01 12:49:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:49:20,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:49:20,997 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_275 (Array Int Int))) (= (+ c_~t11~0 c_~s1~0) (+ c_~s2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_275) c_~x~0.base) (+ c_~x~0.offset (* c_~i1~0 4)))))) is different from false [2023-09-01 12:49:21,004 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 34 treesize of output 26 [2023-09-01 12:49:21,089 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 12:49:21,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018734566] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:49:21,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:49:21,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2023-09-01 12:49:21,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650328327] [2023-09-01 12:49:21,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:49:21,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:49:21,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:49:21,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:49:21,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=479, Unknown=6, NotChecked=44, Total=600 [2023-09-01 12:49:21,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-09-01 12:49:21,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 385 transitions, 3471 flow. Second operand has 25 states, 25 states have (on average 135.2) internal successors, (3380), 25 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:21,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:49:21,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-09-01 12:49:21,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:49:29,120 INFO L130 PetriNetUnfolder]: 41995/55463 cut-off events. [2023-09-01 12:49:29,121 INFO L131 PetriNetUnfolder]: For 248015/248015 co-relation queries the response was YES. [2023-09-01 12:49:29,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230637 conditions, 55463 events. 41995/55463 cut-off events. For 248015/248015 co-relation queries the response was YES. Maximal size of possible extension queue 1989. Compared 307169 event pairs, 7141 based on Foata normal form. 3/55466 useless extension candidates. Maximal degree in co-relation 203666. Up to 37297 conditions per place. [2023-09-01 12:49:29,617 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 521 selfloop transitions, 206 changer transitions 14/741 dead transitions. [2023-09-01 12:49:29,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 741 transitions, 7726 flow [2023-09-01 12:49:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 12:49:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 12:49:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2516 transitions. [2023-09-01 12:49:29,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37 [2023-09-01 12:49:29,626 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2516 transitions. [2023-09-01 12:49:29,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2516 transitions. [2023-09-01 12:49:29,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:49:29,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2516 transitions. [2023-09-01 12:49:29,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 148.0) internal successors, (2516), 17 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:29,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:29,646 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:29,646 INFO L175 Difference]: Start difference. First operand has 113 places, 385 transitions, 3471 flow. Second operand 17 states and 2516 transitions. [2023-09-01 12:49:29,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 741 transitions, 7726 flow [2023-09-01 12:49:35,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 741 transitions, 7376 flow, removed 173 selfloop flow, removed 3 redundant places. [2023-09-01 12:49:35,042 INFO L231 Difference]: Finished difference. Result has 134 places, 544 transitions, 5484 flow [2023-09-01 12:49:35,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5484, PETRI_PLACES=134, PETRI_TRANSITIONS=544} [2023-09-01 12:49:35,043 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2023-09-01 12:49:35,043 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 544 transitions, 5484 flow [2023-09-01 12:49:35,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 135.2) internal successors, (3380), 25 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:35,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:35,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:35,052 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 12:49:35,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:35,250 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:49:35,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1439824054, now seen corresponding path program 1 times [2023-09-01 12:49:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:35,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606575614] [2023-09-01 12:49:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:35,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:36,321 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 12:49:36,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606575614] [2023-09-01 12:49:36,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606575614] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:49:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407746175] [2023-09-01 12:49:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:36,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:36,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:49:36,325 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 12:49:36,334 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 12:49:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjunts are in the unsatisfiable core [2023-09-01 12:49:36,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:49:36,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:49:36,735 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 18 treesize of output 20 [2023-09-01 12:49:36,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:49:36,804 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 18 treesize of output 20 [2023-09-01 12:49:36,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:49:36,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-09-01 12:49:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:49:37,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:49:37,394 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 102 treesize of output 75 [2023-09-01 12:49:37,399 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 75 treesize of output 61 [2023-09-01 12:49:37,404 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 35 treesize of output 28 [2023-09-01 12:49:37,663 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 12:49:37,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407746175] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:49:37,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:49:37,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-09-01 12:49:37,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260032191] [2023-09-01 12:49:37,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:49:37,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:49:37,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:49:37,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:49:37,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=804, Unknown=4, NotChecked=0, Total=930 [2023-09-01 12:49:38,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-09-01 12:49:38,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 544 transitions, 5484 flow. Second operand has 31 states, 31 states have (on average 128.70967741935485) internal successors, (3990), 31 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:38,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:49:38,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-09-01 12:49:38,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:49:56,932 INFO L130 PetriNetUnfolder]: 62211/82163 cut-off events. [2023-09-01 12:49:56,932 INFO L131 PetriNetUnfolder]: For 425215/425215 co-relation queries the response was YES. [2023-09-01 12:49:57,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349531 conditions, 82163 events. 62211/82163 cut-off events. For 425215/425215 co-relation queries the response was YES. Maximal size of possible extension queue 3075. Compared 478713 event pairs, 5710 based on Foata normal form. 12/82175 useless extension candidates. Maximal degree in co-relation 349465. Up to 44572 conditions per place. [2023-09-01 12:49:57,573 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 1027 selfloop transitions, 751 changer transitions 44/1822 dead transitions. [2023-09-01 12:49:57,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1822 transitions, 18693 flow [2023-09-01 12:49:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-09-01 12:49:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-09-01 12:49:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 8331 transitions. [2023-09-01 12:49:57,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3530084745762712 [2023-09-01 12:49:57,591 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 8331 transitions. [2023-09-01 12:49:57,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 8331 transitions. [2023-09-01 12:49:57,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:49:57,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 8331 transitions. [2023-09-01 12:49:57,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 141.20338983050848) internal successors, (8331), 59 states have internal predecessors, (8331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:57,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 400.0) internal successors, (24000), 60 states have internal predecessors, (24000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:57,642 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 400.0) internal successors, (24000), 60 states have internal predecessors, (24000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:57,643 INFO L175 Difference]: Start difference. First operand has 134 places, 544 transitions, 5484 flow. Second operand 59 states and 8331 transitions. [2023-09-01 12:49:57,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1822 transitions, 18693 flow [2023-09-01 12:50:09,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 1822 transitions, 18219 flow, removed 171 selfloop flow, removed 6 redundant places. [2023-09-01 12:50:09,518 INFO L231 Difference]: Finished difference. Result has 210 places, 1223 transitions, 15224 flow [2023-09-01 12:50:09,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=15224, PETRI_PLACES=210, PETRI_TRANSITIONS=1223} [2023-09-01 12:50:09,519 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 171 predicate places. [2023-09-01 12:50:09,519 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 1223 transitions, 15224 flow [2023-09-01 12:50:09,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 128.70967741935485) internal successors, (3990), 31 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:09,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:50:09,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:50:09,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 12:50:09,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:50:09,721 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:50:09,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:50:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1615068153, now seen corresponding path program 1 times [2023-09-01 12:50:09,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:50:09,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581107009] [2023-09-01 12:50:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:50:09,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:50:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:50:10,519 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 12:50:10,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:50:10,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581107009] [2023-09-01 12:50:10,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581107009] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:50:10,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515830737] [2023-09-01 12:50:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:50:10,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:50:10,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:50:10,521 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 12:50:10,523 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 12:50:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:50:10,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 64 conjunts are in the unsatisfiable core [2023-09-01 12:50:10,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:50:11,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:50:11,157 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 12:50:11,233 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 12:50:11,370 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 12:50:11,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:50:11,600 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 12:50:11,601 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 56 treesize of output 35 [2023-09-01 12:50:11,833 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 12:50:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515830737] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:50:11,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:50:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-09-01 12:50:11,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89935387] [2023-09-01 12:50:11,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:50:11,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 12:50:11,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:50:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 12:50:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=575, Unknown=2, NotChecked=0, Total=702 [2023-09-01 12:50:12,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-09-01 12:50:12,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 1223 transitions, 15224 flow. Second operand has 27 states, 27 states have (on average 135.07407407407408) internal successors, (3647), 27 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:12,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:50:12,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-09-01 12:50:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:50:42,883 INFO L130 PetriNetUnfolder]: 97406/128832 cut-off events. [2023-09-01 12:50:42,883 INFO L131 PetriNetUnfolder]: For 893624/893624 co-relation queries the response was YES. [2023-09-01 12:50:43,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628906 conditions, 128832 events. 97406/128832 cut-off events. For 893624/893624 co-relation queries the response was YES. Maximal size of possible extension queue 4157. Compared 784535 event pairs, 12146 based on Foata normal form. 410/129242 useless extension candidates. Maximal degree in co-relation 621783. Up to 59622 conditions per place. [2023-09-01 12:50:44,529 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 2062 selfloop transitions, 826 changer transitions 99/2987 dead transitions. [2023-09-01 12:50:44,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 2987 transitions, 36980 flow [2023-09-01 12:50:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-09-01 12:50:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-09-01 12:50:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 11446 transitions. [2023-09-01 12:50:44,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37162337662337663 [2023-09-01 12:50:44,542 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 11446 transitions. [2023-09-01 12:50:44,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 11446 transitions. [2023-09-01 12:50:44,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:50:44,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 11446 transitions. [2023-09-01 12:50:44,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 148.64935064935065) internal successors, (11446), 77 states have internal predecessors, (11446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:44,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 400.0) internal successors, (31200), 78 states have internal predecessors, (31200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:44,596 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 400.0) internal successors, (31200), 78 states have internal predecessors, (31200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:44,596 INFO L175 Difference]: Start difference. First operand has 210 places, 1223 transitions, 15224 flow. Second operand 77 states and 11446 transitions. [2023-09-01 12:50:44,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 2987 transitions, 36980 flow [2023-09-01 12:51:30,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 2987 transitions, 32376 flow, removed 2167 selfloop flow, removed 10 redundant places. [2023-09-01 12:51:30,745 INFO L231 Difference]: Finished difference. Result has 304 places, 1925 transitions, 24106 flow [2023-09-01 12:51:30,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=12920, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=912, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=24106, PETRI_PLACES=304, PETRI_TRANSITIONS=1925} [2023-09-01 12:51:30,747 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 265 predicate places. [2023-09-01 12:51:30,747 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1925 transitions, 24106 flow [2023-09-01 12:51:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 135.07407407407408) internal successors, (3647), 27 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:30,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:51:30,748 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:51:30,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 12:51:30,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:51:30,949 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:51:30,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:51:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2074877216, now seen corresponding path program 2 times [2023-09-01 12:51:30,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:51:30,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629343814] [2023-09-01 12:51:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:51:30,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:51:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:51:31,482 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 12:51:31,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:51:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629343814] [2023-09-01 12:51:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629343814] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:51:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431987318] [2023-09-01 12:51:31,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:51:31,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:51:31,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:51:31,485 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 12:51:31,487 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 12:51:31,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:51:31,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:51:31,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 12:51:31,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:51:31,869 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 19 treesize of output 7 [2023-09-01 12:51:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:51:32,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:51:32,271 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 12:51:32,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431987318] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:51:32,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:51:32,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2023-09-01 12:51:32,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951671325] [2023-09-01 12:51:32,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:51:32,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:51:32,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:51:32,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:51:32,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:51:32,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 400 [2023-09-01 12:51:32,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1925 transitions, 24106 flow. Second operand has 21 states, 21 states have (on average 155.9047619047619) internal successors, (3274), 21 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:32,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:51:32,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 400 [2023-09-01 12:51:32,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:52:15,732 INFO L130 PetriNetUnfolder]: 122979/162471 cut-off events. [2023-09-01 12:52:15,732 INFO L131 PetriNetUnfolder]: For 973001/973001 co-relation queries the response was YES. [2023-09-01 12:52:17,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804203 conditions, 162471 events. 122979/162471 cut-off events. For 973001/973001 co-relation queries the response was YES. Maximal size of possible extension queue 5348. Compared 1013088 event pairs, 16865 based on Foata normal form. 19/162490 useless extension candidates. Maximal degree in co-relation 799124. Up to 128944 conditions per place. [2023-09-01 12:52:18,464 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 1735 selfloop transitions, 1299 changer transitions 11/3045 dead transitions. [2023-09-01 12:52:18,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 3045 transitions, 43043 flow [2023-09-01 12:52:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 12:52:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 12:52:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4693 transitions. [2023-09-01 12:52:18,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41901785714285716 [2023-09-01 12:52:18,470 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4693 transitions. [2023-09-01 12:52:18,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4693 transitions. [2023-09-01 12:52:18,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:52:18,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4693 transitions. [2023-09-01 12:52:18,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 167.60714285714286) internal successors, (4693), 28 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:52:18,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 400.0) internal successors, (11600), 29 states have internal predecessors, (11600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:52:18,486 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 400.0) internal successors, (11600), 29 states have internal predecessors, (11600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:52:18,486 INFO L175 Difference]: Start difference. First operand has 304 places, 1925 transitions, 24106 flow. Second operand 28 states and 4693 transitions. [2023-09-01 12:52:18,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 3045 transitions, 43043 flow [2023-09-01 12:53:27,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 3045 transitions, 37847 flow, removed 2408 selfloop flow, removed 8 redundant places. [2023-09-01 12:53:27,995 INFO L231 Difference]: Finished difference. Result has 340 places, 2730 transitions, 35116 flow [2023-09-01 12:53:27,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=20567, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=35116, PETRI_PLACES=340, PETRI_TRANSITIONS=2730} [2023-09-01 12:53:27,997 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 301 predicate places. [2023-09-01 12:53:27,998 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 2730 transitions, 35116 flow [2023-09-01 12:53:27,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 155.9047619047619) internal successors, (3274), 21 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:53:27,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:53:27,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:53:28,005 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 12:53:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:53:28,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:53:28,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:53:28,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1844979306, now seen corresponding path program 2 times [2023-09-01 12:53:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:53:28,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988951054] [2023-09-01 12:53:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:53:28,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:53:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:53:29,070 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 12:53:29,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:53:29,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988951054] [2023-09-01 12:53:29,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988951054] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:53:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437810431] [2023-09-01 12:53:29,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:53:29,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:53:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:53:29,073 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 12:53:29,077 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 12:53:29,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:53:29,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:53:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 53 conjunts are in the unsatisfiable core [2023-09-01 12:53:29,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:53:29,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:53:29,408 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 18 treesize of output 20 [2023-09-01 12:53:29,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:53:29,468 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 18 treesize of output 20 [2023-09-01 12:53:29,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:53:29,569 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 18 treesize of output 20 [2023-09-01 12:53:29,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:53:29,598 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 23 treesize of output 15 [2023-09-01 12:53:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:53:29,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:53:29,823 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_537 (Array Int Int))) (= (+ c_~s2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_537) c_~x~0.base) (+ c_~x~0.offset (* c_~i1~0 4)))) (+ c_~t11~0 c_~s1~0))) is different from false [2023-09-01 12:53:29,836 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_537 (Array Int Int)) (v_ArrVal_536 (Array Int Int))) (= (+ c_~t11~0 c_~s1~0) (+ c_~s2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_536) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_537) c_~x~0.base) (+ c_~x~0.offset (* c_~i1~0 4)))))) is different from false [2023-09-01 12:53:29,921 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 220 treesize of output 164 [2023-09-01 12:53:29,929 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 86 treesize of output 80 [2023-09-01 12:53:29,933 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 158 treesize of output 134 [2023-09-01 12:53:29,936 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 134 treesize of output 122 [2023-09-01 12:53:30,091 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 12:53:30,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437810431] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:53:30,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:53:30,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 27 [2023-09-01 12:53:30,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792271429] [2023-09-01 12:53:30,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:53:30,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 12:53:30,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:53:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 12:53:30,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=598, Unknown=14, NotChecked=102, Total=812 [2023-09-01 12:53:30,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-09-01 12:53:30,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 2730 transitions, 35116 flow. Second operand has 29 states, 29 states have (on average 128.48275862068965) internal successors, (3726), 29 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:53:30,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:53:30,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-09-01 12:53:30,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:53:40,794 WARN L222 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 68 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:54:07,019 WARN L222 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 76 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:54:25,354 WARN L222 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 72 DAG size of output: 56 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:54:28,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:55:32,400 INFO L130 PetriNetUnfolder]: 142217/188113 cut-off events. [2023-09-01 12:55:32,401 INFO L131 PetriNetUnfolder]: For 1180487/1180487 co-relation queries the response was YES. [2023-09-01 12:55:35,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982067 conditions, 188113 events. 142217/188113 cut-off events. For 1180487/1180487 co-relation queries the response was YES. Maximal size of possible extension queue 6514. Compared 1200495 event pairs, 19830 based on Foata normal form. 1097/189210 useless extension candidates. Maximal degree in co-relation 977651. Up to 74387 conditions per place. [2023-09-01 12:55:36,075 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 2615 selfloop transitions, 1636 changer transitions 22/4273 dead transitions. [2023-09-01 12:55:36,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 4273 transitions, 59340 flow [2023-09-01 12:55:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-09-01 12:55:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-09-01 12:55:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 9260 transitions. [2023-09-01 12:55:36,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35075757575757577 [2023-09-01 12:55:36,087 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 9260 transitions. [2023-09-01 12:55:36,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 9260 transitions. [2023-09-01 12:55:36,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:55:36,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 9260 transitions. [2023-09-01 12:55:36,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 140.3030303030303) internal successors, (9260), 66 states have internal predecessors, (9260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:55:36,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 400.0) internal successors, (26800), 67 states have internal predecessors, (26800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:55:36,123 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 400.0) internal successors, (26800), 67 states have internal predecessors, (26800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:55:36,123 INFO L175 Difference]: Start difference. First operand has 340 places, 2730 transitions, 35116 flow. Second operand 66 states and 9260 transitions. [2023-09-01 12:55:36,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 4273 transitions, 59340 flow [2023-09-01 12:57:07,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 4273 transitions, 57536 flow, removed 881 selfloop flow, removed 7 redundant places. [2023-09-01 12:57:07,998 INFO L231 Difference]: Finished difference. Result has 424 places, 3664 transitions, 50911 flow [2023-09-01 12:57:08,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=32812, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=744, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1818, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=50911, PETRI_PLACES=424, PETRI_TRANSITIONS=3664} [2023-09-01 12:57:08,001 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 385 predicate places. [2023-09-01 12:57:08,001 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 3664 transitions, 50911 flow [2023-09-01 12:57:08,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 128.48275862068965) internal successors, (3726), 29 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:08,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:08,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:08,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:57:08,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:08,208 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 12:57:08,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:08,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1582268893, now seen corresponding path program 2 times [2023-09-01 12:57:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:08,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361992775] [2023-09-01 12:57:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:08,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:09,026 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 12:57:09,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:09,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361992775] [2023-09-01 12:57:09,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361992775] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:09,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688637957] [2023-09-01 12:57:09,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:57:09,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:09,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:09,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:57:09,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:57:09,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:57:09,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:57:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 65 conjunts are in the unsatisfiable core [2023-09-01 12:57:09,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:09,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 12:57:09,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:57:09,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:57:09,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:57:09,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:57:10,262 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 19 treesize of output 7 [2023-09-01 12:57:10,601 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 12:57:10,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:10,968 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 12:57:10,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688637957] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:57:10,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:57:10,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 5] total 22 [2023-09-01 12:57:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586967370] [2023-09-01 12:57:10,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:57:10,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 12:57:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 12:57:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:57:12,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 400 [2023-09-01 12:57:12,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 3664 transitions, 50911 flow. Second operand has 23 states, 23 states have (on average 150.56521739130434) internal successors, (3463), 23 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:12,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:12,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 400 [2023-09-01 12:57:12,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand