./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-complex/safestack_relacy.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 516fee84c55ddb7fa4275a43ad5a2da6ea994abf63bbbbd8ed5c82108d65f7b0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:27:02,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:27:02,821 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:27:02,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:27:02,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:27:02,849 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:27:02,850 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:27:02,850 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:27:02,851 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:27:02,851 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:27:02,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:27:02,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:27:02,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:27:02,851 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:27:02,851 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:27:02,852 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:27:02,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:27:02,852 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:27:02,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:27:02,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:27:02,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:27:02,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:27:02,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:27:02,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:27:02,853 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:27:02,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:27:02,853 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:27:02,853 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:27:02,853 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:27:02,853 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:27:02,854 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:27:02,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:27:02,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:27:02,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:27:02,854 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:27:02,854 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:27:02,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:27:02,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:27:02,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:27:02,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:27:02,855 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:27:02,855 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:27:02,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:27:02,855 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> 516fee84c55ddb7fa4275a43ad5a2da6ea994abf63bbbbd8ed5c82108d65f7b0 [2025-02-06 04:27:03,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:27:03,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:27:03,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:27:03,161 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:27:03,161 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:27:03,162 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/safestack_relacy.i [2025-02-06 04:27:04,545 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/561a1ac29/109b5461a46442aeb9311b16c025c177/FLAG1f589a116 [2025-02-06 04:27:04,921 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:27:04,921 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2025-02-06 04:27:04,950 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/561a1ac29/109b5461a46442aeb9311b16c025c177/FLAG1f589a116 [2025-02-06 04:27:04,969 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/561a1ac29/109b5461a46442aeb9311b16c025c177 [2025-02-06 04:27:04,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:27:04,975 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:27:04,977 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:27:04,977 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:27:04,981 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:27:04,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:27:04" (1/1) ... [2025-02-06 04:27:04,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d98f3fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:04, skipping insertion in model container [2025-02-06 04:27:04,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:27:04" (1/1) ... [2025-02-06 04:27:05,036 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:27:05,602 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.i[76630,76643] [2025-02-06 04:27:05,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:27:05,622 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:27:05,689 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.i[76630,76643] [2025-02-06 04:27:05,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:27:05,788 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:27:05,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05 WrapperNode [2025-02-06 04:27:05,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:27:05,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:27:05,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:27:05,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:27:05,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,827 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,865 INFO L138 Inliner]: procedures = 458, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2025-02-06 04:27:05,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:27:05,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:27:05,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:27:05,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:27:05,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,887 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,908 INFO L175 MemorySlicer]: Split 37 memory accesses to 3 slices as follows [2, 5, 30]. 81 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 3, 8]. The 13 writes are split as follows [0, 1, 12]. [2025-02-06 04:27:05,909 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,924 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,940 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:27:05,949 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:27:05,949 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:27:05,949 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:27:05,951 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (1/1) ... [2025-02-06 04:27:05,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:27:05,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:27:05,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 04:27:05,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 04:27:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2025-02-06 04:27:06,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:27:06,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:27:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 04:27:06,011 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:27:06,265 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:27:06,267 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:27:06,578 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:27:06,578 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:27:06,693 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:27:06,693 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:27:06,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:27:06 BoogieIcfgContainer [2025-02-06 04:27:06,696 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:27:06,698 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:27:06,698 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:27:06,703 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:27:06,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:27:04" (1/3) ... [2025-02-06 04:27:06,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d936273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:27:06, skipping insertion in model container [2025-02-06 04:27:06,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:27:05" (2/3) ... [2025-02-06 04:27:06,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d936273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:27:06, skipping insertion in model container [2025-02-06 04:27:06,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:27:06" (3/3) ... [2025-02-06 04:27:06,706 INFO L128 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2025-02-06 04:27:06,719 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:27:06,720 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safestack_relacy.i that has 2 procedures, 51 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-02-06 04:27:06,720 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:27:06,776 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-02-06 04:27:06,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 63 transitions, 133 flow [2025-02-06 04:27:06,846 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2025-02-06 04:27:06,848 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:27:06,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 67 events. 12/67 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 119 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 49. Up to 3 conditions per place. [2025-02-06 04:27:06,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 63 transitions, 133 flow [2025-02-06 04:27:06,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 61 transitions, 126 flow [2025-02-06 04:27:06,870 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:27:06,884 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;@d0efc92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:27:06,884 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:27:06,892 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:27:06,892 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2025-02-06 04:27:06,892 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:27:06,893 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:27:06,893 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:27:06,894 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 04:27:06,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:27:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1272573628, now seen corresponding path program 1 times [2025-02-06 04:27:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:27:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208265018] [2025-02-06 04:27:06,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:27:06,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:27:07,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 04:27:07,100 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 04:27:07,104 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:27:07,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:27:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:27:07,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:27:07,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208265018] [2025-02-06 04:27:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208265018] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:27:07,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:27:07,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:27:07,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404074991] [2025-02-06 04:27:07,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:27:07,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:27:07,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:27:07,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:27:07,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:27:07,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2025-02-06 04:27:07,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:27:07,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:27:07,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2025-02-06 04:27:07,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:27:07,762 INFO L124 PetriNetUnfolderBase]: 177/405 cut-off events. [2025-02-06 04:27:07,762 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:27:07,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 405 events. 177/405 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1471 event pairs, 140 based on Foata normal form. 19/328 useless extension candidates. Maximal degree in co-relation 722. Up to 344 conditions per place. [2025-02-06 04:27:07,769 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 45 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-02-06 04:27:07,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 59 transitions, 220 flow [2025-02-06 04:27:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:27:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:27:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2025-02-06 04:27:07,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2025-02-06 04:27:07,785 INFO L175 Difference]: Start difference. First operand has 53 places, 61 transitions, 126 flow. Second operand 4 states and 94 transitions. [2025-02-06 04:27:07,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 59 transitions, 220 flow [2025-02-06 04:27:07,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 04:27:07,793 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 134 flow [2025-02-06 04:27:07,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2025-02-06 04:27:07,802 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2025-02-06 04:27:07,802 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 134 flow [2025-02-06 04:27:07,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:27:07,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:27:07,803 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:27:07,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:27:07,804 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 04:27:07,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:27:07,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1795632324, now seen corresponding path program 1 times [2025-02-06 04:27:07,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:27:07,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031512313] [2025-02-06 04:27:07,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:27:07,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:27:07,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:27:07,856 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:27:07,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:27:07,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:27:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:27:08,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:27:08,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031512313] [2025-02-06 04:27:08,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031512313] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:27:08,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688074494] [2025-02-06 04:27:08,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:27:08,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:27:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:27:08,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:27:08,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 04:27:08,193 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:27:08,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:27:08,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:27:08,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:27:08,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 04:27:08,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:27:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:27:08,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:27:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:27:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688074494] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:27:08,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:27:08,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-06 04:27:08,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561981081] [2025-02-06 04:27:08,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:27:08,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 04:27:08,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:27:08,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 04:27:08,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:27:08,339 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 63 [2025-02-06 04:27:08,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:27:08,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:27:08,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 63 [2025-02-06 04:27:08,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:27:08,637 INFO L124 PetriNetUnfolderBase]: 177/408 cut-off events. [2025-02-06 04:27:08,638 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:27:08,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 408 events. 177/408 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1472 event pairs, 140 based on Foata normal form. 1/313 useless extension candidates. Maximal degree in co-relation 741. Up to 344 conditions per place. [2025-02-06 04:27:08,641 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 47 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2025-02-06 04:27:08,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 254 flow [2025-02-06 04:27:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:27:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:27:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2025-02-06 04:27:08,647 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28835978835978837 [2025-02-06 04:27:08,647 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 134 flow. Second operand 6 states and 109 transitions. [2025-02-06 04:27:08,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 254 flow [2025-02-06 04:27:08,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 04:27:08,651 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 160 flow [2025-02-06 04:27:08,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2025-02-06 04:27:08,652 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2025-02-06 04:27:08,653 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 160 flow [2025-02-06 04:27:08,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:27:08,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:27:08,654 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:27:08,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 04:27:08,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:27:08,855 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 04:27:08,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:27:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2095894972, now seen corresponding path program 2 times [2025-02-06 04:27:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:27:08,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521884940] [2025-02-06 04:27:08,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:27:08,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:27:08,883 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 04:27:08,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:27:08,922 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:27:08,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:27:08,923 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:27:08,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:27:08,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:27:08,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:27:08,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:27:08,972 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:27:08,972 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:27:08,973 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-02-06 04:27:08,975 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-02-06 04:27:08,975 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2025-02-06 04:27:08,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:27:08,975 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1] [2025-02-06 04:27:08,979 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 04:27:08,979 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-02-06 04:27:09,017 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:27:09,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 109 transitions, 234 flow [2025-02-06 04:27:09,038 INFO L124 PetriNetUnfolderBase]: 24/124 cut-off events. [2025-02-06 04:27:09,038 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-02-06 04:27:09,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 124 events. 24/124 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 394 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2025-02-06 04:27:09,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 109 transitions, 234 flow [2025-02-06 04:27:09,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 109 transitions, 234 flow [2025-02-06 04:27:09,043 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:27:09,047 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;@d0efc92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:27:09,047 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-06 04:27:09,054 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:27:09,055 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2025-02-06 04:27:09,055 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 04:27:09,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:27:09,055 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:27:09,055 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2025-02-06 04:27:09,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:27:09,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2127236669, now seen corresponding path program 1 times [2025-02-06 04:27:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:27:09,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068055791] [2025-02-06 04:27:09,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:27:09,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:27:09,080 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:27:09,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:27:09,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:27:09,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:27:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:27:09,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:27:09,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068055791] [2025-02-06 04:27:09,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068055791] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:27:09,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:27:09,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:27:09,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324444619] [2025-02-06 04:27:09,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:27:09,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:27:09,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:27:09,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:27:09,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:27:09,217 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 109 [2025-02-06 04:27:09,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 109 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:27:09,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:27:09,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 109 [2025-02-06 04:27:09,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:27:11,137 INFO L124 PetriNetUnfolderBase]: 11728/18518 cut-off events. [2025-02-06 04:27:11,138 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2025-02-06 04:27:11,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35795 conditions, 18518 events. 11728/18518 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 115668 event pairs, 9938 based on Foata normal form. 1120/15688 useless extension candidates. Maximal degree in co-relation 31100. Up to 17115 conditions per place. [2025-02-06 04:27:11,261 INFO L140 encePairwiseOnDemand]: 96/109 looper letters, 81 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2025-02-06 04:27:11,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 103 transitions, 392 flow [2025-02-06 04:27:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:27:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:27:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 166 transitions. [2025-02-06 04:27:11,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38073394495412843 [2025-02-06 04:27:11,263 INFO L175 Difference]: Start difference. First operand has 91 places, 109 transitions, 234 flow. Second operand 4 states and 166 transitions. [2025-02-06 04:27:11,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 103 transitions, 392 flow [2025-02-06 04:27:11,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 103 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 04:27:11,266 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 234 flow [2025-02-06 04:27:11,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2025-02-06 04:27:11,267 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 4 predicate places. [2025-02-06 04:27:11,267 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 234 flow [2025-02-06 04:27:11,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:27:11,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:27:11,268 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:27:11,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:27:11,268 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2025-02-06 04:27:11,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:27:11,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2106478888, now seen corresponding path program 1 times [2025-02-06 04:27:11,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:27:11,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164601270] [2025-02-06 04:27:11,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:27:11,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:27:11,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:27:11,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:27:11,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:27:11,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:27:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:27:11,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:27:11,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164601270] [2025-02-06 04:27:11,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164601270] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:27:11,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961809851] [2025-02-06 04:27:11,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:27:11,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:27:11,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:27:11,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:27:11,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 04:27:11,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:27:11,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:27:11,549 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:27:11,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:27:11,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 04:27:11,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:27:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:27:11,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:27:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:27:11,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961809851] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:27:11,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:27:11,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-06 04:27:11,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615952945] [2025-02-06 04:27:11,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:27:11,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 04:27:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:27:11,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 04:27:11,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:27:11,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 109 [2025-02-06 04:27:11,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 234 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:27:11,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:27:11,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 109 [2025-02-06 04:27:11,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:27:13,345 INFO L124 PetriNetUnfolderBase]: 11728/18521 cut-off events. [2025-02-06 04:27:13,346 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2025-02-06 04:27:13,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35813 conditions, 18521 events. 11728/18521 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 115645 event pairs, 9938 based on Foata normal form. 1/14572 useless extension candidates. Maximal degree in co-relation 35772. Up to 17115 conditions per place. [2025-02-06 04:27:13,466 INFO L140 encePairwiseOnDemand]: 103/109 looper letters, 83 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2025-02-06 04:27:13,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 426 flow [2025-02-06 04:27:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:27:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:27:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2025-02-06 04:27:13,469 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29510703363914376 [2025-02-06 04:27:13,469 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 234 flow. Second operand 6 states and 193 transitions. [2025-02-06 04:27:13,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 426 flow [2025-02-06 04:27:13,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 107 transitions, 420 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 04:27:13,474 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 260 flow [2025-02-06 04:27:13,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=100, PETRI_TRANSITIONS=104} [2025-02-06 04:27:13,475 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 9 predicate places. [2025-02-06 04:27:13,475 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 260 flow [2025-02-06 04:27:13,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:27:13,475 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:27:13,475 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:27:13,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 04:27:13,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:27:13,676 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2025-02-06 04:27:13,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:27:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1577944157, now seen corresponding path program 2 times [2025-02-06 04:27:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:27:13,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637234419] [2025-02-06 04:27:13,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:27:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:27:13,696 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:27:13,720 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:27:13,720 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:27:13,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:27:13,721 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:27:13,726 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:27:13,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:27:13,743 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:27:13,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:27:13,753 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:27:13,755 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:27:13,755 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-02-06 04:27:13,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2025-02-06 04:27:13,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-02-06 04:27:13,756 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-02-06 04:27:13,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 04:27:13,756 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1] [2025-02-06 04:27:13,757 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 04:27:13,757 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-02-06 04:27:13,816 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 04:27:13,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 155 transitions, 337 flow [2025-02-06 04:27:13,844 INFO L124 PetriNetUnfolderBase]: 39/192 cut-off events. [2025-02-06 04:27:13,845 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-02-06 04:27:13,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 192 events. 39/192 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 786 event pairs, 1 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 154. Up to 12 conditions per place. [2025-02-06 04:27:13,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 155 transitions, 337 flow [2025-02-06 04:27:13,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 155 transitions, 337 flow [2025-02-06 04:27:13,850 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:27:13,851 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;@d0efc92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:27:13,851 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-02-06 04:27:13,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:27:13,856 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2025-02-06 04:27:13,856 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-02-06 04:27:13,857 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:27:13,857 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:27:13,857 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2025-02-06 04:27:13,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:27:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1683824082, now seen corresponding path program 1 times [2025-02-06 04:27:13,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:27:13,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400128515] [2025-02-06 04:27:13,858 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:27:13,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:27:13,873 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:27:13,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:27:13,883 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:27:13,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:27:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:27:13,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:27:13,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400128515] [2025-02-06 04:27:13,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400128515] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:27:13,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:27:13,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:27:13,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262330413] [2025-02-06 04:27:13,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:27:13,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 04:27:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:27:13,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 04:27:13,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 04:27:13,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 155 [2025-02-06 04:27:13,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 155 transitions, 337 flow. Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:27:13,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:27:13,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 155 [2025-02-06 04:27:13,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand