./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:32:36,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:32:36,716 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:32:36,720 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:32:36,721 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:32:36,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:32:36,749 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:32:36,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:32:36,750 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:32:36,750 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:32:36,751 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:32:36,751 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:32:36,751 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:32:36,752 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:32:36,754 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:32:36,754 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:32:36,754 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:32:36,755 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:32:36,755 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:32:36,755 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:32:36,755 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:32:36,756 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:32:36,759 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:32:36,759 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:32:36,760 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:32:36,760 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:32:36,760 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:32:36,760 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:32:36,760 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:32:36,761 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:32:36,761 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:32:36,761 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:32:36,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:32:36,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:32:36,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:32:36,761 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:32:36,762 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:32:36,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:32:36,762 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:32:36,762 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:32:36,762 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:32:36,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:32:36,764 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-10-11 14:32:36,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:32:37,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:32:37,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:32:37,017 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:32:37,017 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:32:37,018 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-10-11 14:32:38,341 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:32:38,507 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:32:38,507 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-10-11 14:32:38,515 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f5913ba09/5126feee699d4c919166d9c576a86d1a/FLAG88b95dec7 [2024-10-11 14:32:38,529 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f5913ba09/5126feee699d4c919166d9c576a86d1a [2024-10-11 14:32:38,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:32:38,532 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:32:38,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:32:38,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:32:38,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:32:38,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bc2420d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38, skipping insertion in model container [2024-10-11 14:32:38,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,562 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:32:38,701 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4403,4416] [2024-10-11 14:32:38,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:32:38,720 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:32:38,740 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4403,4416] [2024-10-11 14:32:38,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:32:38,756 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:32:38,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38 WrapperNode [2024-10-11 14:32:38,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:32:38,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:32:38,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:32:38,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:32:38,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,798 INFO L138 Inliner]: procedures = 26, calls = 67, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 340 [2024-10-11 14:32:38,798 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:32:38,799 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:32:38,799 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:32:38,799 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:32:38,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,812 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,848 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-11 14:32:38,848 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,857 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,862 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,863 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,864 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,867 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:32:38,867 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:32:38,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:32:38,868 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:32:38,869 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (1/1) ... [2024-10-11 14:32:38,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:32:38,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:38,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:32:38,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:32:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:32:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:32:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:32:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:32:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:32:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:32:38,952 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:32:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:32:38,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:32:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:32:38,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:32:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-11 14:32:38,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-11 14:32:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:32:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:32:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:32:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:32:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:32:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:32:38,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:32:38,955 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:32:39,082 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:32:39,084 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:32:39,486 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:32:39,486 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:32:39,745 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:32:39,745 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-11 14:32:39,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:39 BoogieIcfgContainer [2024-10-11 14:32:39,746 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:32:39,749 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:32:39,750 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:32:39,752 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:32:39,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:38" (1/3) ... [2024-10-11 14:32:39,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537258df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:39, skipping insertion in model container [2024-10-11 14:32:39,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:38" (2/3) ... [2024-10-11 14:32:39,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537258df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:39, skipping insertion in model container [2024-10-11 14:32:39,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:39" (3/3) ... [2024-10-11 14:32:39,756 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-10-11 14:32:39,772 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:32:39,772 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:32:39,772 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:32:39,875 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 14:32:39,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 52 transitions, 132 flow [2024-10-11 14:32:39,999 INFO L124 PetriNetUnfolderBase]: 7/48 cut-off events. [2024-10-11 14:32:40,000 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:32:40,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 48 events. 7/48 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-10-11 14:32:40,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 52 transitions, 132 flow [2024-10-11 14:32:40,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 47 transitions, 118 flow [2024-10-11 14:32:40,018 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:32:40,030 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;@71e33e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:32:40,030 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:32:40,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:32:40,048 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2024-10-11 14:32:40,048 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:32:40,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:40,049 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:40,049 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:40,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:40,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1756639892, now seen corresponding path program 1 times [2024-10-11 14:32:40,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:40,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014907374] [2024-10-11 14:32:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:40,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:40,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:40,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014907374] [2024-10-11 14:32:40,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014907374] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:40,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:40,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:32:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942657358] [2024-10-11 14:32:40,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:40,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:32:40,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:32:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:32:40,442 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-10-11 14:32:40,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:40,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:40,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-10-11 14:32:40,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:40,943 INFO L124 PetriNetUnfolderBase]: 2408/3712 cut-off events. [2024-10-11 14:32:40,944 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-10-11 14:32:40,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6983 conditions, 3712 events. 2408/3712 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21371 event pairs, 472 based on Foata normal form. 1/3493 useless extension candidates. Maximal degree in co-relation 6291. Up to 2067 conditions per place. [2024-10-11 14:32:40,970 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 43 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2024-10-11 14:32:40,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 64 transitions, 261 flow [2024-10-11 14:32:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:32:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:32:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-10-11 14:32:40,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7115384615384616 [2024-10-11 14:32:40,991 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 118 flow. Second operand 3 states and 111 transitions. [2024-10-11 14:32:40,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 64 transitions, 261 flow [2024-10-11 14:32:40,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 235 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 14:32:41,001 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 121 flow [2024-10-11 14:32:41,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2024-10-11 14:32:41,006 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2024-10-11 14:32:41,007 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 121 flow [2024-10-11 14:32:41,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:41,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:41,008 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:41,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:32:41,009 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:41,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash -891124569, now seen corresponding path program 1 times [2024-10-11 14:32:41,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:41,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378338326] [2024-10-11 14:32:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:41,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:41,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:41,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378338326] [2024-10-11 14:32:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378338326] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:41,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:41,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:32:41,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209433897] [2024-10-11 14:32:41,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:41,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:32:41,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:32:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:32:41,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-10-11 14:32:41,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:41,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:41,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-10-11 14:32:41,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:41,529 INFO L124 PetriNetUnfolderBase]: 2398/3648 cut-off events. [2024-10-11 14:32:41,529 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2024-10-11 14:32:41,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7581 conditions, 3648 events. 2398/3648 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20905 event pairs, 549 based on Foata normal form. 76/3563 useless extension candidates. Maximal degree in co-relation 2649. Up to 2321 conditions per place. [2024-10-11 14:32:41,546 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 51 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-10-11 14:32:41,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 283 flow [2024-10-11 14:32:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:32:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:32:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-10-11 14:32:41,548 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2024-10-11 14:32:41,548 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 121 flow. Second operand 3 states and 114 transitions. [2024-10-11 14:32:41,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 283 flow [2024-10-11 14:32:41,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:41,551 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 132 flow [2024-10-11 14:32:41,551 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2024-10-11 14:32:41,552 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -3 predicate places. [2024-10-11 14:32:41,552 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 132 flow [2024-10-11 14:32:41,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:41,552 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:41,552 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:41,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:32:41,553 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:41,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1628986663, now seen corresponding path program 1 times [2024-10-11 14:32:41,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:41,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008575641] [2024-10-11 14:32:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:41,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:41,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008575641] [2024-10-11 14:32:41,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008575641] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:41,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:41,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:32:41,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958117957] [2024-10-11 14:32:41,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:41,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:32:41,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:41,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:32:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:32:41,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-10-11 14:32:41,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:41,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:41,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-10-11 14:32:41,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:42,039 INFO L124 PetriNetUnfolderBase]: 2363/3739 cut-off events. [2024-10-11 14:32:42,040 INFO L125 PetriNetUnfolderBase]: For 1405/1405 co-relation queries the response was YES. [2024-10-11 14:32:42,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8147 conditions, 3739 events. 2363/3739 cut-off events. For 1405/1405 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22719 event pairs, 571 based on Foata normal form. 35/3600 useless extension candidates. Maximal degree in co-relation 5952. Up to 2334 conditions per place. [2024-10-11 14:32:42,062 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 51 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-10-11 14:32:42,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 299 flow [2024-10-11 14:32:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:32:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:32:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-10-11 14:32:42,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.717948717948718 [2024-10-11 14:32:42,069 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 132 flow. Second operand 3 states and 112 transitions. [2024-10-11 14:32:42,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 299 flow [2024-10-11 14:32:42,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:42,072 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 144 flow [2024-10-11 14:32:42,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-10-11 14:32:42,074 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-10-11 14:32:42,074 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 144 flow [2024-10-11 14:32:42,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:42,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:42,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:42,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:32:42,075 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:42,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1573378156, now seen corresponding path program 1 times [2024-10-11 14:32:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:42,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129226034] [2024-10-11 14:32:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:42,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:42,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129226034] [2024-10-11 14:32:42,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129226034] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:42,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:42,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:32:42,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895937423] [2024-10-11 14:32:42,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:42,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:32:42,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:42,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:32:42,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:32:42,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-10-11 14:32:42,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:42,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:42,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-10-11 14:32:42,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:42,641 INFO L124 PetriNetUnfolderBase]: 2795/4444 cut-off events. [2024-10-11 14:32:42,642 INFO L125 PetriNetUnfolderBase]: For 2274/2274 co-relation queries the response was YES. [2024-10-11 14:32:42,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10251 conditions, 4444 events. 2795/4444 cut-off events. For 2274/2274 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 29407 event pairs, 2080 based on Foata normal form. 94/4053 useless extension candidates. Maximal degree in co-relation 4768. Up to 3079 conditions per place. [2024-10-11 14:32:42,665 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 58 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-10-11 14:32:42,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 347 flow [2024-10-11 14:32:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:32:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:32:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-10-11 14:32:42,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-10-11 14:32:42,668 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 144 flow. Second operand 5 states and 162 transitions. [2024-10-11 14:32:42,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 347 flow [2024-10-11 14:32:42,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 79 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:42,670 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 170 flow [2024-10-11 14:32:42,671 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-10-11 14:32:42,671 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2024-10-11 14:32:42,671 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 170 flow [2024-10-11 14:32:42,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:42,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:42,672 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:42,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:32:42,672 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:42,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 29395084, now seen corresponding path program 1 times [2024-10-11 14:32:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:42,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143463783] [2024-10-11 14:32:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:42,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:42,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143463783] [2024-10-11 14:32:42,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143463783] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:42,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:42,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:32:42,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716482009] [2024-10-11 14:32:42,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:42,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:32:42,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:42,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:32:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:32:42,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-10-11 14:32:42,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:42,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:42,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-10-11 14:32:42,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:43,285 INFO L124 PetriNetUnfolderBase]: 3459/5671 cut-off events. [2024-10-11 14:32:43,285 INFO L125 PetriNetUnfolderBase]: For 2903/2903 co-relation queries the response was YES. [2024-10-11 14:32:43,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12804 conditions, 5671 events. 3459/5671 cut-off events. For 2903/2903 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 40579 event pairs, 2644 based on Foata normal form. 131/5188 useless extension candidates. Maximal degree in co-relation 10447. Up to 3845 conditions per place. [2024-10-11 14:32:43,308 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 59 selfloop transitions, 6 changer transitions 2/84 dead transitions. [2024-10-11 14:32:43,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 400 flow [2024-10-11 14:32:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:32:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:32:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-10-11 14:32:43,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-10-11 14:32:43,311 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 170 flow. Second operand 5 states and 162 transitions. [2024-10-11 14:32:43,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 400 flow [2024-10-11 14:32:43,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 396 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:43,315 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 209 flow [2024-10-11 14:32:43,316 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-10-11 14:32:43,317 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2024-10-11 14:32:43,318 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 209 flow [2024-10-11 14:32:43,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:43,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:43,318 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:43,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:32:43,319 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:43,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:43,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1852658935, now seen corresponding path program 1 times [2024-10-11 14:32:43,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:43,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208529854] [2024-10-11 14:32:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:43,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:32:43,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:43,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208529854] [2024-10-11 14:32:43,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208529854] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:43,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:43,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:32:43,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133632363] [2024-10-11 14:32:43,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:43,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:32:43,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:43,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:32:43,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:32:43,558 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-10-11 14:32:43,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:43,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:43,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-10-11 14:32:43,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:44,610 INFO L124 PetriNetUnfolderBase]: 8319/13428 cut-off events. [2024-10-11 14:32:44,611 INFO L125 PetriNetUnfolderBase]: For 5838/5855 co-relation queries the response was YES. [2024-10-11 14:32:44,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30064 conditions, 13428 events. 8319/13428 cut-off events. For 5838/5855 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 101177 event pairs, 3756 based on Foata normal form. 0/12312 useless extension candidates. Maximal degree in co-relation 22628. Up to 4773 conditions per place. [2024-10-11 14:32:44,655 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 100 selfloop transitions, 9 changer transitions 1/124 dead transitions. [2024-10-11 14:32:44,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 124 transitions, 645 flow [2024-10-11 14:32:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:32:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:32:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-10-11 14:32:44,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6442307692307693 [2024-10-11 14:32:44,657 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 209 flow. Second operand 6 states and 201 transitions. [2024-10-11 14:32:44,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 124 transitions, 645 flow [2024-10-11 14:32:44,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 124 transitions, 638 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:44,661 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 262 flow [2024-10-11 14:32:44,661 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-10-11 14:32:44,661 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 19 predicate places. [2024-10-11 14:32:44,662 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 262 flow [2024-10-11 14:32:44,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:44,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:44,662 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:44,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:32:44,662 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:44,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash -655930463, now seen corresponding path program 1 times [2024-10-11 14:32:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:44,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796207321] [2024-10-11 14:32:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:32:44,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:44,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796207321] [2024-10-11 14:32:44,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796207321] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:44,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:44,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:32:44,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679097551] [2024-10-11 14:32:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:44,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:32:44,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:32:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:32:44,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-10-11 14:32:44,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:44,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:44,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-10-11 14:32:44,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:46,141 INFO L124 PetriNetUnfolderBase]: 8713/13222 cut-off events. [2024-10-11 14:32:46,141 INFO L125 PetriNetUnfolderBase]: For 6911/7127 co-relation queries the response was YES. [2024-10-11 14:32:46,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31780 conditions, 13222 events. 8713/13222 cut-off events. For 6911/7127 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 92573 event pairs, 3825 based on Foata normal form. 0/11912 useless extension candidates. Maximal degree in co-relation 26763. Up to 5905 conditions per place. [2024-10-11 14:32:46,204 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 63 selfloop transitions, 6 changer transitions 29/112 dead transitions. [2024-10-11 14:32:46,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 112 transitions, 602 flow [2024-10-11 14:32:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:32:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:32:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-10-11 14:32:46,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2024-10-11 14:32:46,206 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 262 flow. Second operand 6 states and 191 transitions. [2024-10-11 14:32:46,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 112 transitions, 602 flow [2024-10-11 14:32:46,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 591 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:46,210 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 250 flow [2024-10-11 14:32:46,210 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2024-10-11 14:32:46,211 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 26 predicate places. [2024-10-11 14:32:46,211 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 250 flow [2024-10-11 14:32:46,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:46,211 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:46,211 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:46,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:32:46,212 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:46,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:46,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1960680660, now seen corresponding path program 1 times [2024-10-11 14:32:46,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:46,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473868983] [2024-10-11 14:32:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:46,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:46,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:46,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473868983] [2024-10-11 14:32:46,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473868983] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:46,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336418788] [2024-10-11 14:32:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:46,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:46,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:46,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:46,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:32:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:46,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:32:46,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:46,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:46,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336418788] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:46,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:46,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-10-11 14:32:46,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028565509] [2024-10-11 14:32:46,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:46,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:32:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:46,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:32:46,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:32:47,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-10-11 14:32:47,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 250 flow. Second operand has 18 states, 18 states have (on average 21.333333333333332) internal successors, (384), 18 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:47,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:47,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-10-11 14:32:47,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:48,671 INFO L124 PetriNetUnfolderBase]: 11916/17554 cut-off events. [2024-10-11 14:32:48,672 INFO L125 PetriNetUnfolderBase]: For 9682/9682 co-relation queries the response was YES. [2024-10-11 14:32:48,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44269 conditions, 17554 events. 11916/17554 cut-off events. For 9682/9682 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 121240 event pairs, 949 based on Foata normal form. 0/17013 useless extension candidates. Maximal degree in co-relation 39905. Up to 4001 conditions per place. [2024-10-11 14:32:48,772 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 142 selfloop transitions, 18 changer transitions 8/182 dead transitions. [2024-10-11 14:32:48,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 182 transitions, 1022 flow [2024-10-11 14:32:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:32:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:32:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 354 transitions. [2024-10-11 14:32:48,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-10-11 14:32:48,775 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 250 flow. Second operand 12 states and 354 transitions. [2024-10-11 14:32:48,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 182 transitions, 1022 flow [2024-10-11 14:32:48,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 182 transitions, 1001 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-10-11 14:32:48,801 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 305 flow [2024-10-11 14:32:48,802 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=305, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-10-11 14:32:48,804 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 29 predicate places. [2024-10-11 14:32:48,804 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 305 flow [2024-10-11 14:32:48,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.333333333333332) internal successors, (384), 18 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:48,805 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:48,805 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:48,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:32:49,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:49,006 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:49,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:49,006 INFO L85 PathProgramCache]: Analyzing trace with hash -833904744, now seen corresponding path program 2 times [2024-10-11 14:32:49,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:49,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493151547] [2024-10-11 14:32:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:49,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:32:49,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:49,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493151547] [2024-10-11 14:32:49,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493151547] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:49,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:49,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:32:49,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555710897] [2024-10-11 14:32:49,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:49,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:32:49,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:49,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:32:49,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:32:49,450 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 52 [2024-10-11 14:32:49,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 305 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:49,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:49,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 52 [2024-10-11 14:32:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:50,483 INFO L124 PetriNetUnfolderBase]: 7252/10819 cut-off events. [2024-10-11 14:32:50,483 INFO L125 PetriNetUnfolderBase]: For 15002/15354 co-relation queries the response was YES. [2024-10-11 14:32:50,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31167 conditions, 10819 events. 7252/10819 cut-off events. For 15002/15354 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 71585 event pairs, 533 based on Foata normal form. 448/11028 useless extension candidates. Maximal degree in co-relation 31132. Up to 5468 conditions per place. [2024-10-11 14:32:50,525 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 80 selfloop transitions, 5 changer transitions 2/107 dead transitions. [2024-10-11 14:32:50,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 107 transitions, 679 flow [2024-10-11 14:32:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:32:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:32:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-10-11 14:32:50,527 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-10-11 14:32:50,527 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 305 flow. Second operand 6 states and 175 transitions. [2024-10-11 14:32:50,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 107 transitions, 679 flow [2024-10-11 14:32:50,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 628 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-10-11 14:32:50,538 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 271 flow [2024-10-11 14:32:50,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-10-11 14:32:50,539 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-10-11 14:32:50,540 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 271 flow [2024-10-11 14:32:50,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:50,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:50,541 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:50,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:32:50,541 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:50,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash -556028396, now seen corresponding path program 1 times [2024-10-11 14:32:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:50,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144704896] [2024-10-11 14:32:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:50,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:32:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144704896] [2024-10-11 14:32:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144704896] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75707047] [2024-10-11 14:32:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:50,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:50,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:50,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:50,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:32:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:50,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:32:50,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:32:51,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:32:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75707047] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:51,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:51,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2024-10-11 14:32:51,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943460758] [2024-10-11 14:32:51,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:51,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:32:51,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:32:51,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:32:51,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-10-11 14:32:51,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 271 flow. Second operand has 17 states, 17 states have (on average 20.88235294117647) internal successors, (355), 17 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:51,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:51,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-10-11 14:32:51,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:55,381 INFO L124 PetriNetUnfolderBase]: 22162/31915 cut-off events. [2024-10-11 14:32:55,382 INFO L125 PetriNetUnfolderBase]: For 36855/37732 co-relation queries the response was YES. [2024-10-11 14:32:55,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91791 conditions, 31915 events. 22162/31915 cut-off events. For 36855/37732 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 219618 event pairs, 387 based on Foata normal form. 1146/32400 useless extension candidates. Maximal degree in co-relation 91758. Up to 4291 conditions per place. [2024-10-11 14:32:55,633 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 440 selfloop transitions, 180 changer transitions 0/633 dead transitions. [2024-10-11 14:32:55,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 633 transitions, 3956 flow [2024-10-11 14:32:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-11 14:32:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-11 14:32:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1061 transitions. [2024-10-11 14:32:55,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5514553014553014 [2024-10-11 14:32:55,637 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 271 flow. Second operand 37 states and 1061 transitions. [2024-10-11 14:32:55,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 633 transitions, 3956 flow [2024-10-11 14:32:55,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 633 transitions, 3904 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-10-11 14:32:55,673 INFO L231 Difference]: Finished difference. Result has 139 places, 246 transitions, 2009 flow [2024-10-11 14:32:55,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2009, PETRI_PLACES=139, PETRI_TRANSITIONS=246} [2024-10-11 14:32:55,676 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 86 predicate places. [2024-10-11 14:32:55,676 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 246 transitions, 2009 flow [2024-10-11 14:32:55,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.88235294117647) internal successors, (355), 17 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:55,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:55,678 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:55,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:32:55,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:55,883 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:55,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1107838688, now seen corresponding path program 1 times [2024-10-11 14:32:55,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:55,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653248277] [2024-10-11 14:32:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:32:56,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:56,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653248277] [2024-10-11 14:32:56,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653248277] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:56,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397539227] [2024-10-11 14:32:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:56,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:56,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:56,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:56,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:32:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:56,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:32:56,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:56,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:56,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397539227] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:56,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:32:56,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 11 [2024-10-11 14:32:56,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744030495] [2024-10-11 14:32:56,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:56,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:32:56,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:56,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:32:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:32:56,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-10-11 14:32:56,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 246 transitions, 2009 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:56,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:56,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-10-11 14:32:56,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:05,101 INFO L124 PetriNetUnfolderBase]: 50407/72218 cut-off events. [2024-10-11 14:33:05,101 INFO L125 PetriNetUnfolderBase]: For 986842/989112 co-relation queries the response was YES. [2024-10-11 14:33:05,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357744 conditions, 72218 events. 50407/72218 cut-off events. For 986842/989112 co-relation queries the response was YES. Maximal size of possible extension queue 2684. Compared 518428 event pairs, 4938 based on Foata normal form. 1911/73930 useless extension candidates. Maximal degree in co-relation 357682. Up to 23482 conditions per place. [2024-10-11 14:33:05,940 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 471 selfloop transitions, 51 changer transitions 0/533 dead transitions. [2024-10-11 14:33:05,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 533 transitions, 5733 flow [2024-10-11 14:33:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:33:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:33:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-10-11 14:33:05,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-10-11 14:33:05,942 INFO L175 Difference]: Start difference. First operand has 139 places, 246 transitions, 2009 flow. Second operand 6 states and 184 transitions. [2024-10-11 14:33:05,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 533 transitions, 5733 flow [2024-10-11 14:33:10,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 533 transitions, 5610 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-10-11 14:33:10,310 INFO L231 Difference]: Finished difference. Result has 141 places, 273 transitions, 2349 flow [2024-10-11 14:33:10,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2349, PETRI_PLACES=141, PETRI_TRANSITIONS=273} [2024-10-11 14:33:10,311 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 88 predicate places. [2024-10-11 14:33:10,311 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 273 transitions, 2349 flow [2024-10-11 14:33:10,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:10,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:10,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:10,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:33:10,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:10,516 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:10,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:10,517 INFO L85 PathProgramCache]: Analyzing trace with hash 521217783, now seen corresponding path program 1 times [2024-10-11 14:33:10,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:10,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742448762] [2024-10-11 14:33:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:10,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:13,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:13,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742448762] [2024-10-11 14:33:13,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742448762] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:13,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838105337] [2024-10-11 14:33:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:13,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:13,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:13,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:13,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:33:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:13,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-11 14:33:13,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:13,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 14:33:13,258 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 [2024-10-11 14:33:13,312 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-11 14:33:13,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-11 14:33:13,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-10-11 14:33:13,394 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 14:33:13,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 14:33:13,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-10-11 14:33:13,859 INFO L349 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2024-10-11 14:33:13,859 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 46 treesize of output 46 [2024-10-11 14:33:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:13,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:33:15,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:33:15,030 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 113 [2024-10-11 14:33:15,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:33:15,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2226 treesize of output 2158 [2024-10-11 14:33:15,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:33:15,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1138 treesize of output 1210 [2024-10-11 14:33:15,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:33:15,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 994 treesize of output 922