./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/pthread/stack_longer-2.i -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 --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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:05:25,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:05:25,687 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:05:25,690 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:05:25,690 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:05:25,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:05:25,707 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:05:25,708 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:05:25,708 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:05:25,711 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:05:25,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:05:25,711 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:05:25,712 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:05:25,712 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:05:25,712 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:05:25,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:05:25,712 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:05:25,712 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:05:25,712 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:05:25,713 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:05:25,713 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:05:25,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:05:25,713 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:05:25,714 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:05:25,714 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:05:25,714 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:05:25,714 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:05:25,714 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:05:25,714 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:05:25,715 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:05:25,715 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:05:25,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:05:25,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:05:25,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:05:25,715 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:05:25,715 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:05:25,716 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:05:25,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:05:25,716 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:05:25,716 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:05:25,716 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:05:25,716 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:05:25,717 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2024-11-16 19:05:25,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:05:25,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:05:25,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:05:25,948 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:05:25,948 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:05:25,949 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longer-2.i [2024-11-16 19:05:27,136 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:05:27,145 ERROR L? ?]: Error during toolchain job processing: java.lang.NullPointerException at org.eclipse.cdt.internal.core.model.PathEntry.kindFromString(PathEntry.java:80) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.decodePathEntry(DefaultPathEntryStore.java:127) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.getRawPathEntries(DefaultPathEntryStore.java:97) at org.eclipse.cdt.internal.core.model.PathEntryStoreProxy.getRawPathEntries(PathEntryStoreProxy.java:102) at org.eclipse.cdt.internal.core.model.PathEntryManager.getRawPathEntries(PathEntryManager.java:666) at org.eclipse.cdt.core.model.CoreModel.getRawPathEntries(CoreModel.java:937) at org.eclipse.cdt.core.model.CoreModel.oldIsScannerInformationEmpty(CoreModel.java:1307) at org.eclipse.cdt.core.model.CoreModel.isScannerInformationEmpty(CoreModel.java:1252) at org.eclipse.cdt.internal.core.pdom.indexer.ProjectIndexerInputAdapter.isFileBuildConfigured(ProjectIndexerInputAdapter.java:267) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.isRequiredInIndex(AbstractIndexerTask.java:748) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.extractFiles(AbstractIndexerTask.java:667) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.runTask(AbstractIndexerTask.java:558) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMIndexerTask.run(PDOMIndexerTask.java:164) at org.eclipse.cdt.internal.core.pdom.PDOMIndexerJob.run(PDOMIndexerJob.java:160) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-16 19:05:27,348 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:05:27,349 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i [2024-11-16 19:05:27,362 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/781b1b2c1/a8f1420b111442b89cf077d060be76c1/FLAGb386b9fe7 [2024-11-16 19:05:27,374 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/781b1b2c1/a8f1420b111442b89cf077d060be76c1 [2024-11-16 19:05:27,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:05:27,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:05:27,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:05:27,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:05:27,382 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:05:27,383 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,384 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc3ee4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27, skipping insertion in model container [2024-11-16 19:05:27,384 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,418 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:05:27,734 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2024-11-16 19:05:27,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:05:27,777 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:05:27,804 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2024-11-16 19:05:27,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:05:27,871 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:05:27,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27 WrapperNode [2024-11-16 19:05:27,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:05:27,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:05:27,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:05:27,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:05:27,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,894 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,941 INFO L138 Inliner]: procedures = 277, calls = 430, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 543 [2024-11-16 19:05:27,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:05:27,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:05:27,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:05:27,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:05:27,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,954 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,971 INFO L175 MemorySlicer]: Split 409 memory accesses to 3 slices as follows [2, 402, 5]. 98 percent of accesses are in the largest equivalence class. The 407 initializations are split as follows [2, 400, 5]. The 1 writes are split as follows [0, 1, 0]. [2024-11-16 19:05:27,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,972 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,986 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,991 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,993 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:27,994 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:28,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:05:28,001 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:05:28,001 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:05:28,001 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:05:28,004 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (1/1) ... [2024-11-16 19:05:28,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:05:28,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:05:28,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:05:28,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:05:28,098 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-16 19:05:28,101 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-16 19:05:28,101 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-16 19:05:28,102 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:05:28,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:05:28,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:05:28,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:05:28,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:05:28,106 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:05:28,247 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:05:28,249 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:05:28,801 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2024-11-16 19:05:28,801 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem37#1; [2024-11-16 19:05:28,801 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret36#1; [2024-11-16 19:05:28,802 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:05:28,802 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:05:32,044 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:05:32,045 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:05:32,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:05:32 BoogieIcfgContainer [2024-11-16 19:05:32,046 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:05:32,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:05:32,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:05:32,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:05:32,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:05:27" (1/3) ... [2024-11-16 19:05:32,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f10b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:05:32, skipping insertion in model container [2024-11-16 19:05:32,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:05:27" (2/3) ... [2024-11-16 19:05:32,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f10b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:05:32, skipping insertion in model container [2024-11-16 19:05:32,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:05:32" (3/3) ... [2024-11-16 19:05:32,055 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-11-16 19:05:32,072 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:05:32,072 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-16 19:05:32,072 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:05:32,146 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:05:32,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 40 transitions, 94 flow [2024-11-16 19:05:32,216 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2024-11-16 19:05:32,217 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:05:32,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 7/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2024-11-16 19:05:32,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 40 transitions, 94 flow [2024-11-16 19:05:32,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 81 flow [2024-11-16 19:05:32,229 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:05:32,237 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1beae4eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:05:32,238 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-16 19:05:32,270 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:05:32,270 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2024-11-16 19:05:32,271 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:05:32,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:05:32,271 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:05:32,272 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:05:32,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:05:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash -824044826, now seen corresponding path program 1 times [2024-11-16 19:05:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:05:32,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484935958] [2024-11-16 19:05:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:05:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:32,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:05:32,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484935958] [2024-11-16 19:05:32,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484935958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:05:32,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:05:32,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:05:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989150053] [2024-11-16 19:05:32,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:05:32,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:05:32,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:05:32,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:05:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:05:32,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-16 19:05:32,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:32,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:05:32,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-16 19:05:32,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:05:33,014 INFO L124 PetriNetUnfolderBase]: 307/633 cut-off events. [2024-11-16 19:05:33,014 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-16 19:05:33,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 633 events. 307/633 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3183 event pairs, 53 based on Foata normal form. 100/661 useless extension candidates. Maximal degree in co-relation 1112. Up to 358 conditions per place. [2024-11-16 19:05:33,021 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 41 selfloop transitions, 3 changer transitions 2/56 dead transitions. [2024-11-16 19:05:33,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 222 flow [2024-11-16 19:05:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:05:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:05:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-16 19:05:33,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-16 19:05:33,033 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 81 flow. Second operand 4 states and 104 transitions. [2024-11-16 19:05:33,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 222 flow [2024-11-16 19:05:33,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 56 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-16 19:05:33,038 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 90 flow [2024-11-16 19:05:33,040 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-16 19:05:33,043 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2024-11-16 19:05:33,044 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 90 flow [2024-11-16 19:05:33,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:33,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:05:33,044 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:05:33,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:05:33,045 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:05:33,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:05:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash -267247071, now seen corresponding path program 1 times [2024-11-16 19:05:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:05:33,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988563173] [2024-11-16 19:05:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:05:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:33,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:05:33,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988563173] [2024-11-16 19:05:33,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988563173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:05:33,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22828710] [2024-11-16 19:05:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:33,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:33,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:05:33,455 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) [2024-11-16 19:05:33,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:05:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:33,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:05:33,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:05:33,702 INFO L378 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 8 treesize of output 1 [2024-11-16 19:05:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:33,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:05:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:33,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22828710] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:05:33,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:05:33,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-16 19:05:33,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045337422] [2024-11-16 19:05:33,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:05:33,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 19:05:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:05:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 19:05:33,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-16 19:05:33,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-16 19:05:33,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 90 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:33,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:05:33,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-16 19:05:33,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:05:34,226 INFO L124 PetriNetUnfolderBase]: 1257/2601 cut-off events. [2024-11-16 19:05:34,227 INFO L125 PetriNetUnfolderBase]: For 299/301 co-relation queries the response was YES. [2024-11-16 19:05:34,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5189 conditions, 2601 events. 1257/2601 cut-off events. For 299/301 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 16131 event pairs, 153 based on Foata normal form. 49/2409 useless extension candidates. Maximal degree in co-relation 4592. Up to 365 conditions per place. [2024-11-16 19:05:34,238 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 163 selfloop transitions, 32 changer transitions 4/208 dead transitions. [2024-11-16 19:05:34,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 208 transitions, 908 flow [2024-11-16 19:05:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 19:05:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-16 19:05:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 373 transitions. [2024-11-16 19:05:34,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6216666666666667 [2024-11-16 19:05:34,245 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 90 flow. Second operand 15 states and 373 transitions. [2024-11-16 19:05:34,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 208 transitions, 908 flow [2024-11-16 19:05:34,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 208 transitions, 904 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:05:34,249 INFO L231 Difference]: Finished difference. Result has 58 places, 70 transitions, 337 flow [2024-11-16 19:05:34,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=337, PETRI_PLACES=58, PETRI_TRANSITIONS=70} [2024-11-16 19:05:34,249 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2024-11-16 19:05:34,249 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 70 transitions, 337 flow [2024-11-16 19:05:34,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:34,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:05:34,250 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:05:34,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:05:34,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:34,450 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:05:34,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:05:34,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1949861549, now seen corresponding path program 1 times [2024-11-16 19:05:34,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:05:34,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772415117] [2024-11-16 19:05:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:34,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:05:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:34,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:05:34,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772415117] [2024-11-16 19:05:34,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772415117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:05:34,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:05:34,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:05:34,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079005573] [2024-11-16 19:05:34,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:05:34,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:05:34,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:05:34,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:05:34,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:05:34,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-16 19:05:34,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 70 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:34,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:05:34,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-16 19:05:34,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:05:34,740 INFO L124 PetriNetUnfolderBase]: 669/1516 cut-off events. [2024-11-16 19:05:34,740 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2024-11-16 19:05:34,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1516 events. 669/1516 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 9000 event pairs, 231 based on Foata normal form. 66/1460 useless extension candidates. Maximal degree in co-relation 3079. Up to 634 conditions per place. [2024-11-16 19:05:34,747 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 43 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-16 19:05:34,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 347 flow [2024-11-16 19:05:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:05:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:05:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-16 19:05:34,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-16 19:05:34,750 INFO L175 Difference]: Start difference. First operand has 58 places, 70 transitions, 337 flow. Second operand 3 states and 70 transitions. [2024-11-16 19:05:34,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 347 flow [2024-11-16 19:05:34,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 315 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-16 19:05:34,758 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 206 flow [2024-11-16 19:05:34,758 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-11-16 19:05:34,759 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2024-11-16 19:05:34,760 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 206 flow [2024-11-16 19:05:34,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:34,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:05:34,760 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:05:34,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:05:34,761 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:05:34,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:05:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2075126240, now seen corresponding path program 1 times [2024-11-16 19:05:34,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:05:34,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853228533] [2024-11-16 19:05:34,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:34,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:05:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:35,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:05:35,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853228533] [2024-11-16 19:05:35,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853228533] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:05:35,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:05:35,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:05:35,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575602797] [2024-11-16 19:05:35,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:05:35,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:05:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:05:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:05:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:05:35,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-16 19:05:35,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:35,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:05:35,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-16 19:05:35,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:05:35,744 INFO L124 PetriNetUnfolderBase]: 813/1808 cut-off events. [2024-11-16 19:05:35,745 INFO L125 PetriNetUnfolderBase]: For 560/562 co-relation queries the response was YES. [2024-11-16 19:05:35,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3942 conditions, 1808 events. 813/1808 cut-off events. For 560/562 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10978 event pairs, 244 based on Foata normal form. 0/1650 useless extension candidates. Maximal degree in co-relation 3554. Up to 823 conditions per place. [2024-11-16 19:05:35,752 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 60 selfloop transitions, 13 changer transitions 6/88 dead transitions. [2024-11-16 19:05:35,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 471 flow [2024-11-16 19:05:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:05:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:05:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-16 19:05:35,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-16 19:05:35,754 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 206 flow. Second operand 5 states and 114 transitions. [2024-11-16 19:05:35,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 471 flow [2024-11-16 19:05:35,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 88 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:05:35,758 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 292 flow [2024-11-16 19:05:35,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-11-16 19:05:35,760 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2024-11-16 19:05:35,760 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 292 flow [2024-11-16 19:05:35,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:35,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:05:35,761 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:05:35,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:05:35,761 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:05:35,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:05:35,761 INFO L85 PathProgramCache]: Analyzing trace with hash 480374829, now seen corresponding path program 1 times [2024-11-16 19:05:35,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:05:35,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370297764] [2024-11-16 19:05:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:35,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:05:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:36,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:05:36,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370297764] [2024-11-16 19:05:36,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370297764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:05:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231425958] [2024-11-16 19:05:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:36,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:05:36,571 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) [2024-11-16 19:05:36,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:05:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:36,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-16 19:05:36,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:05:36,798 INFO L378 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 8 treesize of output 1 [2024-11-16 19:05:36,867 INFO L378 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 25 treesize of output 1 [2024-11-16 19:05:36,932 INFO L378 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 80 treesize of output 32 [2024-11-16 19:05:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:37,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:05:37,320 INFO L378 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 9 treesize of output 1 [2024-11-16 19:05:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:37,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231425958] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:05:37,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:05:37,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-16 19:05:37,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96142971] [2024-11-16 19:05:37,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:05:37,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 19:05:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:05:37,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 19:05:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-16 19:05:37,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-16 19:05:37,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 292 flow. Second operand has 15 states, 15 states have (on average 14.6) internal successors, (219), 15 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:37,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:05:37,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-16 19:05:37,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:05:39,137 INFO L124 PetriNetUnfolderBase]: 2631/5780 cut-off events. [2024-11-16 19:05:39,137 INFO L125 PetriNetUnfolderBase]: For 3550/3550 co-relation queries the response was YES. [2024-11-16 19:05:39,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12714 conditions, 5780 events. 2631/5780 cut-off events. For 3550/3550 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 43497 event pairs, 370 based on Foata normal form. 7/5476 useless extension candidates. Maximal degree in co-relation 11563. Up to 848 conditions per place. [2024-11-16 19:05:39,161 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 292 selfloop transitions, 80 changer transitions 38/419 dead transitions. [2024-11-16 19:05:39,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 419 transitions, 2381 flow [2024-11-16 19:05:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-16 19:05:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-16 19:05:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 745 transitions. [2024-11-16 19:05:39,164 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-11-16 19:05:39,164 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 292 flow. Second operand 33 states and 745 transitions. [2024-11-16 19:05:39,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 419 transitions, 2381 flow [2024-11-16 19:05:39,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 419 transitions, 2373 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-16 19:05:39,185 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 898 flow [2024-11-16 19:05:39,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=898, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-11-16 19:05:39,186 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 61 predicate places. [2024-11-16 19:05:39,186 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 898 flow [2024-11-16 19:05:39,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.6) internal successors, (219), 15 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:39,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:05:39,186 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:05:39,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:05:39,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:39,387 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:05:39,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:05:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash -356717618, now seen corresponding path program 1 times [2024-11-16 19:05:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:05:39,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226286894] [2024-11-16 19:05:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:05:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:05:39,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:05:39,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226286894] [2024-11-16 19:05:39,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226286894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:05:39,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178055319] [2024-11-16 19:05:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:39,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:39,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:05:39,686 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) [2024-11-16 19:05:39,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:05:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:39,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 19:05:39,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:05:39,882 INFO L378 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 8 treesize of output 1 [2024-11-16 19:05:39,926 INFO L378 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 8 treesize of output 1 [2024-11-16 19:05:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:40,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:05:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:05:40,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178055319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:05:40,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:05:40,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 13 [2024-11-16 19:05:40,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492003611] [2024-11-16 19:05:40,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:05:40,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:05:40,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:05:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:05:40,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:05:40,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-16 19:05:40,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 898 flow. Second operand has 13 states, 13 states have (on average 16.0) internal successors, (208), 13 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:40,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:05:40,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-16 19:05:40,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:05:41,234 INFO L124 PetriNetUnfolderBase]: 3793/8312 cut-off events. [2024-11-16 19:05:41,234 INFO L125 PetriNetUnfolderBase]: For 9041/9041 co-relation queries the response was YES. [2024-11-16 19:05:41,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19191 conditions, 8312 events. 3793/8312 cut-off events. For 9041/9041 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 65349 event pairs, 544 based on Foata normal form. 92/7959 useless extension candidates. Maximal degree in co-relation 18011. Up to 1226 conditions per place. [2024-11-16 19:05:41,286 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 191 selfloop transitions, 121 changer transitions 8/329 dead transitions. [2024-11-16 19:05:41,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 329 transitions, 2384 flow [2024-11-16 19:05:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 19:05:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-16 19:05:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 428 transitions. [2024-11-16 19:05:41,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5631578947368421 [2024-11-16 19:05:41,289 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 898 flow. Second operand 19 states and 428 transitions. [2024-11-16 19:05:41,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 329 transitions, 2384 flow [2024-11-16 19:05:41,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 329 transitions, 2340 flow, removed 22 selfloop flow, removed 0 redundant places. [2024-11-16 19:05:41,339 INFO L231 Difference]: Finished difference. Result has 120 places, 168 transitions, 1562 flow [2024-11-16 19:05:41,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1562, PETRI_PLACES=120, PETRI_TRANSITIONS=168} [2024-11-16 19:05:41,340 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 84 predicate places. [2024-11-16 19:05:41,340 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 168 transitions, 1562 flow [2024-11-16 19:05:41,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.0) internal successors, (208), 13 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:41,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:05:41,341 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:05:41,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 19:05:41,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:41,542 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:05:41,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:05:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1617111484, now seen corresponding path program 1 times [2024-11-16 19:05:41,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:05:41,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832654277] [2024-11-16 19:05:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:05:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:05:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832654277] [2024-11-16 19:05:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832654277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:05:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246288007] [2024-11-16 19:05:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:42,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:42,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:05:42,610 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) [2024-11-16 19:05:42,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:05:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:42,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 19:05:42,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:05:42,834 INFO L378 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 23 treesize of output 1 [2024-11-16 19:05:42,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 19 [2024-11-16 19:05:43,159 INFO L378 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 56 treesize of output 32 [2024-11-16 19:05:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:43,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:05:43,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:05:43,587 INFO L378 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 1 case distinctions, treesize of input 18 treesize of output 14 [2024-11-16 19:05:43,619 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-11-16 19:05:43,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 68 [2024-11-16 19:05:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:43,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246288007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:05:43,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:05:43,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-16 19:05:43,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995993187] [2024-11-16 19:05:43,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:05:43,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 19:05:43,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:05:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 19:05:43,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-16 19:05:43,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-16 19:05:43,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 168 transitions, 1562 flow. Second operand has 17 states, 17 states have (on average 15.058823529411764) internal successors, (256), 17 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:43,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:05:43,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-16 19:05:43,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:05:45,830 INFO L124 PetriNetUnfolderBase]: 5464/12121 cut-off events. [2024-11-16 19:05:45,830 INFO L125 PetriNetUnfolderBase]: For 19623/19625 co-relation queries the response was YES. [2024-11-16 19:05:45,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28974 conditions, 12121 events. 5464/12121 cut-off events. For 19623/19625 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 97044 event pairs, 1282 based on Foata normal form. 105/11503 useless extension candidates. Maximal degree in co-relation 28152. Up to 1790 conditions per place. [2024-11-16 19:05:45,917 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 254 selfloop transitions, 171 changer transitions 46/480 dead transitions. [2024-11-16 19:05:45,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 480 transitions, 3846 flow [2024-11-16 19:05:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-16 19:05:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-16 19:05:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 654 transitions. [2024-11-16 19:05:45,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-11-16 19:05:45,920 INFO L175 Difference]: Start difference. First operand has 120 places, 168 transitions, 1562 flow. Second operand 30 states and 654 transitions. [2024-11-16 19:05:45,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 480 transitions, 3846 flow [2024-11-16 19:05:46,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 480 transitions, 3770 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-16 19:05:46,008 INFO L231 Difference]: Finished difference. Result has 149 places, 224 transitions, 2465 flow [2024-11-16 19:05:46,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2465, PETRI_PLACES=149, PETRI_TRANSITIONS=224} [2024-11-16 19:05:46,009 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 113 predicate places. [2024-11-16 19:05:46,009 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 224 transitions, 2465 flow [2024-11-16 19:05:46,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.058823529411764) internal successors, (256), 17 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:46,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:05:46,010 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-16 19:05:46,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 19:05:46,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:46,211 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:05:46,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:05:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1828006438, now seen corresponding path program 2 times [2024-11-16 19:05:46,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:05:46,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281728942] [2024-11-16 19:05:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:46,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:05:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:46,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:05:46,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281728942] [2024-11-16 19:05:46,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281728942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:05:46,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145656217] [2024-11-16 19:05:46,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:05:46,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:05:46,556 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) [2024-11-16 19:05:46,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:05:46,724 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:05:46,724 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:05:46,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-16 19:05:46,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:05:46,751 INFO L378 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 8 treesize of output 1 [2024-11-16 19:05:46,785 INFO L378 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 8 treesize of output 1 [2024-11-16 19:05:46,835 INFO L378 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 8 treesize of output 1 [2024-11-16 19:05:46,888 INFO L378 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 8 treesize of output 1 [2024-11-16 19:05:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:46,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:05:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:47,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145656217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:05:47,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:05:47,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 23 [2024-11-16 19:05:47,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394363014] [2024-11-16 19:05:47,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:05:47,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-16 19:05:47,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:05:47,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-16 19:05:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2024-11-16 19:05:47,052 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-16 19:05:47,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 224 transitions, 2465 flow. Second operand has 24 states, 24 states have (on average 14.166666666666666) internal successors, (340), 24 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:47,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:05:47,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-16 19:05:47,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:05:50,619 INFO L124 PetriNetUnfolderBase]: 12410/27057 cut-off events. [2024-11-16 19:05:50,620 INFO L125 PetriNetUnfolderBase]: For 66957/66957 co-relation queries the response was YES. [2024-11-16 19:05:50,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70507 conditions, 27057 events. 12410/27057 cut-off events. For 66957/66957 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 245730 event pairs, 2477 based on Foata normal form. 230/25821 useless extension candidates. Maximal degree in co-relation 68393. Up to 4020 conditions per place. [2024-11-16 19:05:51,007 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 567 selfloop transitions, 429 changer transitions 20/1025 dead transitions. [2024-11-16 19:05:51,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1025 transitions, 9494 flow [2024-11-16 19:05:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-16 19:05:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-11-16 19:05:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1314 transitions. [2024-11-16 19:05:51,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-11-16 19:05:51,011 INFO L175 Difference]: Start difference. First operand has 149 places, 224 transitions, 2465 flow. Second operand 60 states and 1314 transitions. [2024-11-16 19:05:51,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1025 transitions, 9494 flow [2024-11-16 19:05:51,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1025 transitions, 9300 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-11-16 19:05:51,707 INFO L231 Difference]: Finished difference. Result has 220 places, 510 transitions, 6562 flow [2024-11-16 19:05:51,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=6562, PETRI_PLACES=220, PETRI_TRANSITIONS=510} [2024-11-16 19:05:51,707 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 184 predicate places. [2024-11-16 19:05:51,708 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 510 transitions, 6562 flow [2024-11-16 19:05:51,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.166666666666666) internal successors, (340), 24 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:51,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:05:51,708 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:05:51,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 19:05:51,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:51,913 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:05:51,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:05:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash 346733100, now seen corresponding path program 2 times [2024-11-16 19:05:51,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:05:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067490630] [2024-11-16 19:05:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:05:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:05:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:05:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:53,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:05:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067490630] [2024-11-16 19:05:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067490630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:05:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037693222] [2024-11-16 19:05:53,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:05:53,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:05:53,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:05:53,252 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) [2024-11-16 19:05:53,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 19:05:53,431 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:05:53,431 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:05:53,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-16 19:05:53,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:05:53,461 INFO L378 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 15 treesize of output 1 [2024-11-16 19:05:53,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 14 [2024-11-16 19:05:53,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 14 [2024-11-16 19:05:53,769 INFO L378 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 56 treesize of output 32 [2024-11-16 19:05:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:53,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:05:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:05:54,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037693222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:05:54,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:05:54,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-11-16 19:05:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965794293] [2024-11-16 19:05:54,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:05:54,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 19:05:54,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:05:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 19:05:54,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2024-11-16 19:05:54,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-16 19:05:54,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 510 transitions, 6562 flow. Second operand has 26 states, 26 states have (on average 14.807692307692308) internal successors, (385), 26 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:05:54,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:05:54,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-16 19:05:54,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:06:01,528 INFO L124 PetriNetUnfolderBase]: 19497/42274 cut-off events. [2024-11-16 19:06:01,528 INFO L125 PetriNetUnfolderBase]: For 172921/172929 co-relation queries the response was YES. [2024-11-16 19:06:01,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119700 conditions, 42274 events. 19497/42274 cut-off events. For 172921/172929 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 390946 event pairs, 3467 based on Foata normal form. 518/40521 useless extension candidates. Maximal degree in co-relation 117382. Up to 9870 conditions per place. [2024-11-16 19:06:01,845 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 483 selfloop transitions, 570 changer transitions 20/1082 dead transitions. [2024-11-16 19:06:01,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1082 transitions, 13732 flow [2024-11-16 19:06:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-16 19:06:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-16 19:06:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 659 transitions. [2024-11-16 19:06:01,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5314516129032258 [2024-11-16 19:06:01,848 INFO L175 Difference]: Start difference. First operand has 220 places, 510 transitions, 6562 flow. Second operand 31 states and 659 transitions. [2024-11-16 19:06:01,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1082 transitions, 13732 flow [2024-11-16 19:06:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1082 transitions, 12832 flow, removed 429 selfloop flow, removed 2 redundant places. [2024-11-16 19:06:04,240 INFO L231 Difference]: Finished difference. Result has 261 places, 798 transitions, 11528 flow [2024-11-16 19:06:04,241 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11528, PETRI_PLACES=261, PETRI_TRANSITIONS=798} [2024-11-16 19:06:04,241 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 225 predicate places. [2024-11-16 19:06:04,241 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 798 transitions, 11528 flow [2024-11-16 19:06:04,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.807692307692308) internal successors, (385), 26 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:06:04,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:04,245 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:06:04,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 19:06:04,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:06:04,446 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:06:04,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:04,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1551692024, now seen corresponding path program 1 times [2024-11-16 19:06:04,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:04,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258290233] [2024-11-16 19:06:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:04,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:06:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:06:05,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:06:05,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258290233] [2024-11-16 19:06:05,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258290233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:06:05,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770013649] [2024-11-16 19:06:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:05,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:06:05,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:06:05,072 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) [2024-11-16 19:06:05,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 19:06:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:06:05,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-16 19:06:05,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:06:05,297 INFO L378 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 8 treesize of output 1 [2024-11-16 19:06:05,338 INFO L378 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 8 treesize of output 1 [2024-11-16 19:06:05,375 INFO L378 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 8 treesize of output 1 [2024-11-16 19:06:05,410 INFO L378 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 8 treesize of output 1 [2024-11-16 19:06:05,447 INFO L378 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 8 treesize of output 1 [2024-11-16 19:06:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:06:05,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:06:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 53 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-16 19:06:05,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770013649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:06:05,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:06:05,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 20 [2024-11-16 19:06:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981138432] [2024-11-16 19:06:05,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:06:05,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:06:05,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:06:05,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:06:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:06:05,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-16 19:06:05,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 798 transitions, 11528 flow. Second operand has 20 states, 20 states have (on average 16.75) internal successors, (335), 20 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:06:05,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:06:05,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-16 19:06:05,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:06:21,638 INFO L124 PetriNetUnfolderBase]: 34531/74488 cut-off events. [2024-11-16 19:06:21,639 INFO L125 PetriNetUnfolderBase]: For 501451/501453 co-relation queries the response was YES. [2024-11-16 19:06:22,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228016 conditions, 74488 events. 34531/74488 cut-off events. For 501451/501453 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 724447 event pairs, 4501 based on Foata normal form. 525/71170 useless extension candidates. Maximal degree in co-relation 225750. Up to 11250 conditions per place. [2024-11-16 19:06:22,797 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 688 selfloop transitions, 1331 changer transitions 30/2058 dead transitions. [2024-11-16 19:06:22,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 2058 transitions, 27709 flow [2024-11-16 19:06:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-16 19:06:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-11-16 19:06:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1402 transitions. [2024-11-16 19:06:22,800 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5392307692307692 [2024-11-16 19:06:22,800 INFO L175 Difference]: Start difference. First operand has 261 places, 798 transitions, 11528 flow. Second operand 65 states and 1402 transitions. [2024-11-16 19:06:22,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 2058 transitions, 27709 flow [2024-11-16 19:06:35,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 2058 transitions, 26668 flow, removed 507 selfloop flow, removed 3 redundant places. [2024-11-16 19:06:35,335 INFO L231 Difference]: Finished difference. Result has 334 places, 1473 transitions, 23429 flow [2024-11-16 19:06:35,335 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=696, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=23429, PETRI_PLACES=334, PETRI_TRANSITIONS=1473} [2024-11-16 19:06:35,336 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 298 predicate places. [2024-11-16 19:06:35,336 INFO L471 AbstractCegarLoop]: Abstraction has has 334 places, 1473 transitions, 23429 flow [2024-11-16 19:06:35,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.75) internal successors, (335), 20 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:06:35,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:06:35,337 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:06:35,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 19:06:35,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:06:35,537 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:06:35,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:06:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash 614122194, now seen corresponding path program 3 times [2024-11-16 19:06:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:06:35,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520817167] [2024-11-16 19:06:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:06:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:06:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:06:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:06:37,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:06:37,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520817167] [2024-11-16 19:06:37,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520817167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:06:37,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241410876] [2024-11-16 19:06:37,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:06:37,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:06:37,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:06:37,258 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) [2024-11-16 19:06:37,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 19:06:37,553 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 19:06:37,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:06:37,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-16 19:06:37,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:06:37,581 INFO L378 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 15 treesize of output 1 [2024-11-16 19:06:37,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 14 [2024-11-16 19:06:37,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 14 [2024-11-16 19:06:37,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 14 [2024-11-16 19:06:37,923 INFO L378 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 56 treesize of output 32 [2024-11-16 19:06:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:06:37,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:06:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:06:38,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241410876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:06:38,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:06:38,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2024-11-16 19:06:38,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674128791] [2024-11-16 19:06:38,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:06:38,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-16 19:06:38,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:06:38,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-16 19:06:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2024-11-16 19:06:38,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-16 19:06:38,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1473 transitions, 23429 flow. Second operand has 30 states, 30 states have (on average 15.3) internal successors, (459), 30 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:06:38,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:06:38,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-16 19:06:38,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand