./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8ab0bd5 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:47:55,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:47:55,788 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:47:55,794 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:47:55,796 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:47:55,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:47:55,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:47:55,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:47:55,816 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:47:55,817 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:47:55,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:47:55,817 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:47:55,817 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:47:55,817 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:47:55,817 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:47:55,817 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:47:55,817 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:47:55,817 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:47:55,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:47:55,818 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:47:55,818 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:47:55,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:47:55,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:47:55,819 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/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 -> cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 [2025-03-13 21:47:56,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:47:56,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:47:56,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:47:56,015 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:47:56,015 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:47:56,017 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2025-03-13 21:47:57,096 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f8dd0c8/0a4aa76d84ce45c38be6b78285c1fc61/FLAG2b8b881df [2025-03-13 21:47:57,289 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:47:57,289 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2025-03-13 21:47:57,299 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f8dd0c8/0a4aa76d84ce45c38be6b78285c1fc61/FLAG2b8b881df [2025-03-13 21:47:57,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f8dd0c8/0a4aa76d84ce45c38be6b78285c1fc61 [2025-03-13 21:47:57,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:47:57,662 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:47:57,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:47:57,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:47:57,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:47:57,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,666 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c34d99c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57, skipping insertion in model container [2025-03-13 21:47:57,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,676 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:47:57,801 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2368,2381] [2025-03-13 21:47:57,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:47:57,821 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:47:57,839 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2368,2381] [2025-03-13 21:47:57,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:47:57,859 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:47:57,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57 WrapperNode [2025-03-13 21:47:57,860 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:47:57,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:47:57,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:47:57,861 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:47:57,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,871 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,891 INFO L138 Inliner]: procedures = 22, calls = 24, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 172 [2025-03-13 21:47:57,895 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:47:57,895 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:47:57,896 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:47:57,896 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:47:57,901 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,903 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,914 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-13 21:47:57,914 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,918 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,919 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,920 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,921 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:47:57,923 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:47:57,923 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:47:57,923 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:47:57,924 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (1/1) ... [2025-03-13 21:47:57,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:47:57,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:47:57,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-13 21:47:57,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-13 21:47:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:47:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-13 21:47:57,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-13 21:47:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-13 21:47:57,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-13 21:47:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-13 21:47:57,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-13 21:47:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:47:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:47:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:47:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:47:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-13 21:47:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:47:57,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:47:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:47:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:47:57,964 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:47:58,040 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:47:58,042 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:47:58,259 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:47:58,259 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:47:58,259 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:47:58,494 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:47:58,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:47:58 BoogieIcfgContainer [2025-03-13 21:47:58,494 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:47:58,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:47:58,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:47:58,499 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:47:58,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:47:57" (1/3) ... [2025-03-13 21:47:58,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ccc8412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:47:58, skipping insertion in model container [2025-03-13 21:47:58,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:47:57" (2/3) ... [2025-03-13 21:47:58,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ccc8412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:47:58, skipping insertion in model container [2025-03-13 21:47:58,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:47:58" (3/3) ... [2025-03-13 21:47:58,502 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2025-03-13 21:47:58,512 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:47:58,514 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt.wvr.c that has 4 procedures, 28 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-13 21:47:58,514 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:47:58,558 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-13 21:47:58,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2025-03-13 21:47:58,605 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2025-03-13 21:47:58,607 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:47:58,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2025-03-13 21:47:58,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2025-03-13 21:47:58,613 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2025-03-13 21:47:58,623 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:47:58,633 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;@3a28099f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:47:58,633 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-13 21:47:58,642 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:47:58,642 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2025-03-13 21:47:58,642 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:47:58,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:47:58,643 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:47:58,643 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 1 more)] === [2025-03-13 21:47:58,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:47:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2059787596, now seen corresponding path program 1 times [2025-03-13 21:47:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:47:58,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157275694] [2025-03-13 21:47:58,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:47:58,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:47:58,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-13 21:47:58,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-13 21:47:58,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:47:58,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:47:58,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:47:58,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157275694] [2025-03-13 21:47:58,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157275694] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:47:58,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:47:58,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:47:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947657793] [2025-03-13 21:47:58,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:47:58,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:47:58,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:47:58,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:47:58,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:47:58,923 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:47:58,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-03-13 21:47:58,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:47:58,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:47:58,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:47:59,167 INFO L124 PetriNetUnfolderBase]: 817/1179 cut-off events. [2025-03-13 21:47:59,167 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2025-03-13 21:47:59,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 1179 events. 817/1179 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4420 event pairs, 226 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 2122. Up to 803 conditions per place. [2025-03-13 21:47:59,174 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2025-03-13 21:47:59,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 215 flow [2025-03-13 21:47:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:47:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:47:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-13 21:47:59,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2025-03-13 21:47:59,186 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 3 states and 58 transitions. [2025-03-13 21:47:59,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 215 flow [2025-03-13 21:47:59,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 193 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-13 21:47:59,193 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 86 flow [2025-03-13 21:47:59,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2025-03-13 21:47:59,198 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2025-03-13 21:47:59,198 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 86 flow [2025-03-13 21:47:59,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-03-13 21:47:59,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:47:59,198 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:47:59,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:47:59,199 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 1 more)] === [2025-03-13 21:47:59,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:47:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash 978182213, now seen corresponding path program 1 times [2025-03-13 21:47:59,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:47:59,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195096871] [2025-03-13 21:47:59,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:47:59,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:47:59,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-13 21:47:59,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-13 21:47:59,233 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:47:59,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:47:59,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:47:59,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195096871] [2025-03-13 21:47:59,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195096871] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:47:59,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:47:59,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:47:59,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147350176] [2025-03-13 21:47:59,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:47:59,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:47:59,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:47:59,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:47:59,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:47:59,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:47:59,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2025-03-13 21:47:59,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:47:59,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:47:59,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:47:59,578 INFO L124 PetriNetUnfolderBase]: 1511/2222 cut-off events. [2025-03-13 21:47:59,578 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2025-03-13 21:47:59,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 2222 events. 1511/2222 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9626 event pairs, 946 based on Foata normal form. 98/2038 useless extension candidates. Maximal degree in co-relation 1532. Up to 1179 conditions per place. [2025-03-13 21:47:59,589 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 67 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2025-03-13 21:47:59,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 73 transitions, 346 flow [2025-03-13 21:47:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:47:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:47:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2025-03-13 21:47:59,592 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5548387096774193 [2025-03-13 21:47:59,592 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 86 flow. Second operand 5 states and 86 transitions. [2025-03-13 21:47:59,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 73 transitions, 346 flow [2025-03-13 21:47:59,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:47:59,593 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 120 flow [2025-03-13 21:47:59,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2025-03-13 21:47:59,594 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2025-03-13 21:47:59,594 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 120 flow [2025-03-13 21:47:59,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2025-03-13 21:47:59,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:47:59,595 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:47:59,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:47:59,596 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 1 more)] === [2025-03-13 21:47:59,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:47:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash -990189302, now seen corresponding path program 1 times [2025-03-13 21:47:59,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:47:59,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110583235] [2025-03-13 21:47:59,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:47:59,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:47:59,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-13 21:47:59,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:47:59,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:47:59,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:47:59,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:47:59,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110583235] [2025-03-13 21:47:59,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110583235] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:47:59,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594474619] [2025-03-13 21:47:59,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:47:59,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:47:59,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:47:59,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:47:59,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:47:59,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-13 21:47:59,829 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:47:59,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:47:59,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:59,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:47:59,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:47:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:47:59,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:47:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:47:59,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594474619] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:47:59,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:47:59,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-03-13 21:47:59,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820447608] [2025-03-13 21:47:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:47:59,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:47:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:47:59,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:47:59,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:47:59,976 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:47:59,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:47:59,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:47:59,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:47:59,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:00,438 INFO L124 PetriNetUnfolderBase]: 1896/2781 cut-off events. [2025-03-13 21:48:00,438 INFO L125 PetriNetUnfolderBase]: For 1433/1433 co-relation queries the response was YES. [2025-03-13 21:48:00,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6988 conditions, 2781 events. 1896/2781 cut-off events. For 1433/1433 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12456 event pairs, 628 based on Foata normal form. 0/2434 useless extension candidates. Maximal degree in co-relation 4327. Up to 699 conditions per place. [2025-03-13 21:48:00,452 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 114 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2025-03-13 21:48:00,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 133 transitions, 701 flow [2025-03-13 21:48:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:48:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:48:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2025-03-13 21:48:00,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5129032258064516 [2025-03-13 21:48:00,454 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 120 flow. Second operand 10 states and 159 transitions. [2025-03-13 21:48:00,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 133 transitions, 701 flow [2025-03-13 21:48:00,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 133 transitions, 697 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-13 21:48:00,457 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 225 flow [2025-03-13 21:48:00,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=225, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2025-03-13 21:48:00,458 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2025-03-13 21:48:00,458 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 225 flow [2025-03-13 21:48:00,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:48:00,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:00,458 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:48:00,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:00,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:00,663 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 1 more)] === [2025-03-13 21:48:00,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:00,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2003501666, now seen corresponding path program 2 times [2025-03-13 21:48:00,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:00,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313313034] [2025-03-13 21:48:00,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:48:00,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:00,671 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:00,678 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:00,678 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:00,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:00,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:00,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313313034] [2025-03-13 21:48:00,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313313034] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:00,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548229874] [2025-03-13 21:48:00,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:48:00,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:00,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:00,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:00,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:48:00,828 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:00,847 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:00,847 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:00,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:00,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:48:00,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:00,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:00,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548229874] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:00,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-03-13 21:48:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363025827] [2025-03-13 21:48:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:00,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:00,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:00,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:00,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:48:00,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:00,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:48:00,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:00,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:00,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:01,428 INFO L124 PetriNetUnfolderBase]: 2183/3200 cut-off events. [2025-03-13 21:48:01,429 INFO L125 PetriNetUnfolderBase]: For 3322/3322 co-relation queries the response was YES. [2025-03-13 21:48:01,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9930 conditions, 3200 events. 2183/3200 cut-off events. For 3322/3322 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14240 event pairs, 471 based on Foata normal form. 12/3211 useless extension candidates. Maximal degree in co-relation 7162. Up to 573 conditions per place. [2025-03-13 21:48:01,446 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 124 selfloop transitions, 37 changer transitions 0/162 dead transitions. [2025-03-13 21:48:01,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 162 transitions, 1027 flow [2025-03-13 21:48:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:48:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:48:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2025-03-13 21:48:01,449 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47043010752688175 [2025-03-13 21:48:01,449 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 225 flow. Second operand 12 states and 175 transitions. [2025-03-13 21:48:01,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 162 transitions, 1027 flow [2025-03-13 21:48:01,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 162 transitions, 1024 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:48:01,468 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 491 flow [2025-03-13 21:48:01,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=491, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2025-03-13 21:48:01,469 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2025-03-13 21:48:01,469 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 491 flow [2025-03-13 21:48:01,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:48:01,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:01,470 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:48:01,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:01,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-13 21:48:01,675 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 1 more)] === [2025-03-13 21:48:01,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1140845794, now seen corresponding path program 3 times [2025-03-13 21:48:01,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:01,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275516887] [2025-03-13 21:48:01,676 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:01,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:01,682 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:01,693 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:01,693 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:01,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:01,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:01,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275516887] [2025-03-13 21:48:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275516887] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:01,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222853068] [2025-03-13 21:48:01,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:01,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:01,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:01,802 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:01,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:48:01,842 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:01,858 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:01,858 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:01,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:01,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:48:01,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:01,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:01,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222853068] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:01,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:01,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-03-13 21:48:01,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892667396] [2025-03-13 21:48:01,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:01,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:01,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:01,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:01,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:48:01,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:01,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 491 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:48:01,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:01,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:01,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:02,444 INFO L124 PetriNetUnfolderBase]: 2708/3961 cut-off events. [2025-03-13 21:48:02,445 INFO L125 PetriNetUnfolderBase]: For 8846/8846 co-relation queries the response was YES. [2025-03-13 21:48:02,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14911 conditions, 3961 events. 2708/3961 cut-off events. For 8846/8846 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18502 event pairs, 709 based on Foata normal form. 14/3974 useless extension candidates. Maximal degree in co-relation 12501. Up to 963 conditions per place. [2025-03-13 21:48:02,470 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 130 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2025-03-13 21:48:02,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 187 transitions, 1443 flow [2025-03-13 21:48:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:48:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:48:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2025-03-13 21:48:02,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.530791788856305 [2025-03-13 21:48:02,473 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 491 flow. Second operand 11 states and 181 transitions. [2025-03-13 21:48:02,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 187 transitions, 1443 flow [2025-03-13 21:48:02,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 187 transitions, 1394 flow, removed 17 selfloop flow, removed 3 redundant places. [2025-03-13 21:48:02,510 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 857 flow [2025-03-13 21:48:02,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=857, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2025-03-13 21:48:02,511 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2025-03-13 21:48:02,511 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 857 flow [2025-03-13 21:48:02,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:48:02,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:02,511 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:48:02,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:02,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:02,715 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 1 more)] === [2025-03-13 21:48:02,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1878611678, now seen corresponding path program 4 times [2025-03-13 21:48:02,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:02,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753111904] [2025-03-13 21:48:02,716 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:48:02,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:02,726 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:02,731 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:02,732 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:48:02,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:02,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:02,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753111904] [2025-03-13 21:48:02,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753111904] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858614766] [2025-03-13 21:48:02,789 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:48:02,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:02,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:02,790 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:02,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:48:02,834 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:02,850 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:02,850 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:48:02,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:02,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:48:02,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:02,920 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:02,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858614766] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:02,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:02,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-03-13 21:48:02,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715304151] [2025-03-13 21:48:02,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:02,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:02,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:02,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:02,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:48:02,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:02,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 857 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:48:02,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:02,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:02,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:03,461 INFO L124 PetriNetUnfolderBase]: 2786/4077 cut-off events. [2025-03-13 21:48:03,462 INFO L125 PetriNetUnfolderBase]: For 14309/14309 co-relation queries the response was YES. [2025-03-13 21:48:03,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17264 conditions, 4077 events. 2786/4077 cut-off events. For 14309/14309 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19032 event pairs, 636 based on Foata normal form. 14/4090 useless extension candidates. Maximal degree in co-relation 14317. Up to 803 conditions per place. [2025-03-13 21:48:03,484 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 126 selfloop transitions, 55 changer transitions 0/182 dead transitions. [2025-03-13 21:48:03,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 182 transitions, 1645 flow [2025-03-13 21:48:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:48:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:48:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2025-03-13 21:48:03,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5290322580645161 [2025-03-13 21:48:03,485 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 857 flow. Second operand 10 states and 164 transitions. [2025-03-13 21:48:03,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 182 transitions, 1645 flow [2025-03-13 21:48:03,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 182 transitions, 1576 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-03-13 21:48:03,526 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 1056 flow [2025-03-13 21:48:03,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1056, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2025-03-13 21:48:03,527 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2025-03-13 21:48:03,527 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 1056 flow [2025-03-13 21:48:03,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:48:03,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:03,527 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:48:03,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:03,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:03,728 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 1 more)] === [2025-03-13 21:48:03,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1300610296, now seen corresponding path program 5 times [2025-03-13 21:48:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:03,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293085590] [2025-03-13 21:48:03,728 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:48:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:03,735 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:03,745 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:03,746 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:03,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:03,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:03,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293085590] [2025-03-13 21:48:03,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293085590] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:03,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451797469] [2025-03-13 21:48:03,820 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:48:03,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:03,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:03,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:48:03,865 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:03,880 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:03,880 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:03,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:03,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:48:03,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:03,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:03,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451797469] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:03,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:03,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2025-03-13 21:48:03,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481857262] [2025-03-13 21:48:03,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:03,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:48:03,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:03,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:48:03,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:48:03,987 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:03,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 1056 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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) [2025-03-13 21:48:03,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:03,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:03,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:05,127 INFO L124 PetriNetUnfolderBase]: 3332/4831 cut-off events. [2025-03-13 21:48:05,127 INFO L125 PetriNetUnfolderBase]: For 20168/20168 co-relation queries the response was YES. [2025-03-13 21:48:05,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21188 conditions, 4831 events. 3332/4831 cut-off events. For 20168/20168 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23463 event pairs, 483 based on Foata normal form. 12/4842 useless extension candidates. Maximal degree in co-relation 18565. Up to 988 conditions per place. [2025-03-13 21:48:05,153 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 240 selfloop transitions, 166 changer transitions 0/407 dead transitions. [2025-03-13 21:48:05,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 407 transitions, 4100 flow [2025-03-13 21:48:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-13 21:48:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-13 21:48:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 378 transitions. [2025-03-13 21:48:05,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2025-03-13 21:48:05,156 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 1056 flow. Second operand 27 states and 378 transitions. [2025-03-13 21:48:05,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 407 transitions, 4100 flow [2025-03-13 21:48:05,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 407 transitions, 3999 flow, removed 28 selfloop flow, removed 4 redundant places. [2025-03-13 21:48:05,211 INFO L231 Difference]: Finished difference. Result has 121 places, 217 transitions, 2765 flow [2025-03-13 21:48:05,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2765, PETRI_PLACES=121, PETRI_TRANSITIONS=217} [2025-03-13 21:48:05,211 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 88 predicate places. [2025-03-13 21:48:05,211 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 217 transitions, 2765 flow [2025-03-13 21:48:05,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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) [2025-03-13 21:48:05,212 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:05,212 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:48:05,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:05,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:05,412 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 1 more)] === [2025-03-13 21:48:05,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:05,413 INFO L85 PathProgramCache]: Analyzing trace with hash 395601210, now seen corresponding path program 6 times [2025-03-13 21:48:05,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:05,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643690528] [2025-03-13 21:48:05,413 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:48:05,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:05,420 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:05,428 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:05,428 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:48:05,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:05,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643690528] [2025-03-13 21:48:05,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643690528] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904921641] [2025-03-13 21:48:05,494 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:48:05,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:05,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:05,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:05,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:48:05,539 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:48:05,554 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:48:05,554 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:48:05,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:05,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:48:05,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:05,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:05,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904921641] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:05,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:05,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2025-03-13 21:48:05,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207698319] [2025-03-13 21:48:05,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:05,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:48:05,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:05,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:48:05,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-13 21:48:05,669 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:05,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 217 transitions, 2765 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:48:05,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:05,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:05,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:06,226 INFO L124 PetriNetUnfolderBase]: 3377/4888 cut-off events. [2025-03-13 21:48:06,227 INFO L125 PetriNetUnfolderBase]: For 30730/30730 co-relation queries the response was YES. [2025-03-13 21:48:06,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24395 conditions, 4888 events. 3377/4888 cut-off events. For 30730/30730 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23274 event pairs, 503 based on Foata normal form. 12/4900 useless extension candidates. Maximal degree in co-relation 22621. Up to 1124 conditions per place. [2025-03-13 21:48:06,255 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 175 selfloop transitions, 135 changer transitions 0/311 dead transitions. [2025-03-13 21:48:06,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 311 transitions, 3872 flow [2025-03-13 21:48:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:48:06,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:48:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2025-03-13 21:48:06,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48655913978494625 [2025-03-13 21:48:06,256 INFO L175 Difference]: Start difference. First operand has 121 places, 217 transitions, 2765 flow. Second operand 12 states and 181 transitions. [2025-03-13 21:48:06,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 311 transitions, 3872 flow [2025-03-13 21:48:06,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 311 transitions, 3732 flow, removed 56 selfloop flow, removed 3 redundant places. [2025-03-13 21:48:06,395 INFO L231 Difference]: Finished difference. Result has 132 places, 222 transitions, 3134 flow [2025-03-13 21:48:06,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3134, PETRI_PLACES=132, PETRI_TRANSITIONS=222} [2025-03-13 21:48:06,396 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 99 predicate places. [2025-03-13 21:48:06,396 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 222 transitions, 3134 flow [2025-03-13 21:48:06,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2025-03-13 21:48:06,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:06,396 INFO L206 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] [2025-03-13 21:48:06,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:06,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:06,597 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 1 more)] === [2025-03-13 21:48:06,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash -398914141, now seen corresponding path program 1 times [2025-03-13 21:48:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:06,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872635206] [2025-03-13 21:48:06,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:06,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:06,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:48:06,604 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:48:06,605 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:06,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:06,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:06,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872635206] [2025-03-13 21:48:06,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872635206] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:06,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:06,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:48:06,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449156722] [2025-03-13 21:48:06,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:06,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:48:06,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:06,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:48:06,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:48:06,665 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:06,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 222 transitions, 3134 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2025-03-13 21:48:06,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:06,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:06,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:07,015 INFO L124 PetriNetUnfolderBase]: 2806/4081 cut-off events. [2025-03-13 21:48:07,015 INFO L125 PetriNetUnfolderBase]: For 35181/35181 co-relation queries the response was YES. [2025-03-13 21:48:07,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22001 conditions, 4081 events. 2806/4081 cut-off events. For 35181/35181 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18927 event pairs, 1106 based on Foata normal form. 83/4164 useless extension candidates. Maximal degree in co-relation 20277. Up to 3415 conditions per place. [2025-03-13 21:48:07,039 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 223 selfloop transitions, 7 changer transitions 0/231 dead transitions. [2025-03-13 21:48:07,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 231 transitions, 3581 flow [2025-03-13 21:48:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:48:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:48:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2025-03-13 21:48:07,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2025-03-13 21:48:07,041 INFO L175 Difference]: Start difference. First operand has 132 places, 222 transitions, 3134 flow. Second operand 5 states and 79 transitions. [2025-03-13 21:48:07,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 231 transitions, 3581 flow [2025-03-13 21:48:07,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 231 transitions, 3456 flow, removed 11 selfloop flow, removed 7 redundant places. [2025-03-13 21:48:07,162 INFO L231 Difference]: Finished difference. Result has 122 places, 201 transitions, 2870 flow [2025-03-13 21:48:07,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2870, PETRI_PLACES=122, PETRI_TRANSITIONS=201} [2025-03-13 21:48:07,163 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2025-03-13 21:48:07,163 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 201 transitions, 2870 flow [2025-03-13 21:48:07,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2025-03-13 21:48:07,163 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:07,163 INFO L206 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] [2025-03-13 21:48:07,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-13 21:48:07,163 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 1 more)] === [2025-03-13 21:48:07,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1507440350, now seen corresponding path program 1 times [2025-03-13 21:48:07,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:07,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823459297] [2025-03-13 21:48:07,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:07,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:07,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:48:07,175 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:48:07,176 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:07,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:07,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:07,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823459297] [2025-03-13 21:48:07,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823459297] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:48:07,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:48:07,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:48:07,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966012770] [2025-03-13 21:48:07,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:07,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:48:07,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:07,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:48:07,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:48:07,231 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:07,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 201 transitions, 2870 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2025-03-13 21:48:07,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:07,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:07,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:07,613 INFO L124 PetriNetUnfolderBase]: 2517/3634 cut-off events. [2025-03-13 21:48:07,614 INFO L125 PetriNetUnfolderBase]: For 31739/31739 co-relation queries the response was YES. [2025-03-13 21:48:07,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20018 conditions, 3634 events. 2517/3634 cut-off events. For 31739/31739 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15922 event pairs, 1018 based on Foata normal form. 22/3656 useless extension candidates. Maximal degree in co-relation 19262. Up to 3415 conditions per place. [2025-03-13 21:48:07,638 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 183 selfloop transitions, 2 changer transitions 23/209 dead transitions. [2025-03-13 21:48:07,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 209 transitions, 3294 flow [2025-03-13 21:48:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:48:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:48:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2025-03-13 21:48:07,639 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2025-03-13 21:48:07,639 INFO L175 Difference]: Start difference. First operand has 122 places, 201 transitions, 2870 flow. Second operand 5 states and 71 transitions. [2025-03-13 21:48:07,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 209 transitions, 3294 flow [2025-03-13 21:48:07,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 209 transitions, 3157 flow, removed 12 selfloop flow, removed 9 redundant places. [2025-03-13 21:48:07,759 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2651 flow [2025-03-13 21:48:07,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2651, PETRI_PLACES=115, PETRI_TRANSITIONS=186} [2025-03-13 21:48:07,760 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2025-03-13 21:48:07,760 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2651 flow [2025-03-13 21:48:07,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2025-03-13 21:48:07,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:07,760 INFO L206 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] [2025-03-13 21:48:07,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-13 21:48:07,761 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 1 more)] === [2025-03-13 21:48:07,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:07,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1483541791, now seen corresponding path program 1 times [2025-03-13 21:48:07,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:07,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653394043] [2025-03-13 21:48:07,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:07,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:07,766 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:48:07,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:07,772 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:07,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:07,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:07,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653394043] [2025-03-13 21:48:07,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653394043] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:07,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858600311] [2025-03-13 21:48:07,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:07,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:07,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:07,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:07,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-13 21:48:07,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:48:07,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:48:07,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:07,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:07,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:48:07,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:07,922 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:07,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858600311] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:07,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:48:07,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-13 21:48:07,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056651450] [2025-03-13 21:48:07,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:48:07,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:48:07,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:07,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:48:07,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:48:07,948 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:07,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 186 transitions, 2651 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2025-03-13 21:48:07,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:07,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:07,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:08,296 INFO L124 PetriNetUnfolderBase]: 2615/3717 cut-off events. [2025-03-13 21:48:08,296 INFO L125 PetriNetUnfolderBase]: For 31600/31600 co-relation queries the response was YES. [2025-03-13 21:48:08,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20462 conditions, 3717 events. 2615/3717 cut-off events. For 31600/31600 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16238 event pairs, 743 based on Foata normal form. 248/3965 useless extension candidates. Maximal degree in co-relation 20410. Up to 2853 conditions per place. [2025-03-13 21:48:08,314 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 267 selfloop transitions, 13 changer transitions 0/281 dead transitions. [2025-03-13 21:48:08,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 281 transitions, 4638 flow [2025-03-13 21:48:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:48:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:48:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-03-13 21:48:08,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2025-03-13 21:48:08,315 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2651 flow. Second operand 5 states and 64 transitions. [2025-03-13 21:48:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 281 transitions, 4638 flow [2025-03-13 21:48:08,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 281 transitions, 4551 flow, removed 17 selfloop flow, removed 6 redundant places. [2025-03-13 21:48:08,395 INFO L231 Difference]: Finished difference. Result has 108 places, 187 transitions, 2649 flow [2025-03-13 21:48:08,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2649, PETRI_PLACES=108, PETRI_TRANSITIONS=187} [2025-03-13 21:48:08,396 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 75 predicate places. [2025-03-13 21:48:08,396 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 187 transitions, 2649 flow [2025-03-13 21:48:08,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2025-03-13 21:48:08,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:08,396 INFO L206 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] [2025-03-13 21:48:08,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-13 21:48:08,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:08,597 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 1 more)] === [2025-03-13 21:48:08,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:08,597 INFO L85 PathProgramCache]: Analyzing trace with hash 685758406, now seen corresponding path program 1 times [2025-03-13 21:48:08,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:08,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357145532] [2025-03-13 21:48:08,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:08,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:08,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:48:08,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:08,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:08,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:08,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:08,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357145532] [2025-03-13 21:48:08,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357145532] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:08,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922086581] [2025-03-13 21:48:08,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:08,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:08,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:08,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-13 21:48:08,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:48:08,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:08,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:08,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:08,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-13 21:48:08,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:08,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:48:09,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:48:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:09,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:09,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-03-13 21:48:09,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:48:09,411 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 70 treesize of output 62 [2025-03-13 21:48:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:09,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922086581] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:09,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:09,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-03-13 21:48:09,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258853074] [2025-03-13 21:48:09,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:09,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:48:09,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:09,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:48:09,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:48:09,491 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:09,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 187 transitions, 2649 flow. Second operand has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 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) [2025-03-13 21:48:09,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:09,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:09,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:10,599 INFO L124 PetriNetUnfolderBase]: 4393/6244 cut-off events. [2025-03-13 21:48:10,599 INFO L125 PetriNetUnfolderBase]: For 47380/47380 co-relation queries the response was YES. [2025-03-13 21:48:10,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33756 conditions, 6244 events. 4393/6244 cut-off events. For 47380/47380 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 29773 event pairs, 324 based on Foata normal form. 2/6246 useless extension candidates. Maximal degree in co-relation 31226. Up to 3993 conditions per place. [2025-03-13 21:48:10,629 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 597 selfloop transitions, 102 changer transitions 2/702 dead transitions. [2025-03-13 21:48:10,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 702 transitions, 10479 flow [2025-03-13 21:48:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:48:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:48:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 218 transitions. [2025-03-13 21:48:10,630 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2025-03-13 21:48:10,630 INFO L175 Difference]: Start difference. First operand has 108 places, 187 transitions, 2649 flow. Second operand 14 states and 218 transitions. [2025-03-13 21:48:10,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 702 transitions, 10479 flow [2025-03-13 21:48:10,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 702 transitions, 10441 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-13 21:48:10,828 INFO L231 Difference]: Finished difference. Result has 125 places, 285 transitions, 4291 flow [2025-03-13 21:48:10,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4291, PETRI_PLACES=125, PETRI_TRANSITIONS=285} [2025-03-13 21:48:10,828 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2025-03-13 21:48:10,828 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 285 transitions, 4291 flow [2025-03-13 21:48:10,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 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) [2025-03-13 21:48:10,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:10,829 INFO L206 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] [2025-03-13 21:48:10,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-13 21:48:11,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-13 21:48:11,029 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:48:11,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:11,030 INFO L85 PathProgramCache]: Analyzing trace with hash 450747118, now seen corresponding path program 2 times [2025-03-13 21:48:11,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:11,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420897526] [2025-03-13 21:48:11,030 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:48:11,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:11,036 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:11,049 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:11,049 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:11,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:11,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:11,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420897526] [2025-03-13 21:48:11,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420897526] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:11,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094513375] [2025-03-13 21:48:11,368 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:48:11,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:11,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:11,370 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:11,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-13 21:48:11,410 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:11,426 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:11,426 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:11,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:11,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-13 21:48:11,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:11,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:48:11,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:48:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:11,655 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:11,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-03-13 21:48:11,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:48:11,892 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 70 treesize of output 62 [2025-03-13 21:48:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:11,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094513375] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:11,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:11,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2025-03-13 21:48:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546295274] [2025-03-13 21:48:11,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:11,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-13 21:48:11,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:11,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-13 21:48:11,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2025-03-13 21:48:11,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:11,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 285 transitions, 4291 flow. Second operand has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 states have internal predecessors, (153), 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) [2025-03-13 21:48:11,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:11,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:11,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:13,766 INFO L124 PetriNetUnfolderBase]: 5739/8164 cut-off events. [2025-03-13 21:48:13,766 INFO L125 PetriNetUnfolderBase]: For 69914/69914 co-relation queries the response was YES. [2025-03-13 21:48:13,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47533 conditions, 8164 events. 5739/8164 cut-off events. For 69914/69914 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40344 event pairs, 569 based on Foata normal form. 3/8167 useless extension candidates. Maximal degree in co-relation 44347. Up to 6128 conditions per place. [2025-03-13 21:48:13,815 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 601 selfloop transitions, 237 changer transitions 2/841 dead transitions. [2025-03-13 21:48:13,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 841 transitions, 12696 flow [2025-03-13 21:48:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-13 21:48:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-03-13 21:48:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 413 transitions. [2025-03-13 21:48:13,817 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37007168458781364 [2025-03-13 21:48:13,817 INFO L175 Difference]: Start difference. First operand has 125 places, 285 transitions, 4291 flow. Second operand 36 states and 413 transitions. [2025-03-13 21:48:13,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 841 transitions, 12696 flow [2025-03-13 21:48:14,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 841 transitions, 12624 flow, removed 35 selfloop flow, removed 1 redundant places. [2025-03-13 21:48:14,197 INFO L231 Difference]: Finished difference. Result has 177 places, 522 transitions, 8518 flow [2025-03-13 21:48:14,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8518, PETRI_PLACES=177, PETRI_TRANSITIONS=522} [2025-03-13 21:48:14,198 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 144 predicate places. [2025-03-13 21:48:14,198 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 522 transitions, 8518 flow [2025-03-13 21:48:14,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 states have internal predecessors, (153), 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) [2025-03-13 21:48:14,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:14,198 INFO L206 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] [2025-03-13 21:48:14,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:14,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-13 21:48:14,399 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:48:14,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash 599190345, now seen corresponding path program 1 times [2025-03-13 21:48:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:14,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681580494] [2025-03-13 21:48:14,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:14,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:14,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:48:14,408 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:14,408 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:14,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:14,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:14,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681580494] [2025-03-13 21:48:14,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681580494] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:14,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346613774] [2025-03-13 21:48:14,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:48:14,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:14,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:14,606 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:14,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-13 21:48:14,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:48:14,667 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:14,667 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:48:14,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:14,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:48:14,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:14,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:48:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:14,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:14,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:48:14,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2025-03-13 21:48:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346613774] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:14,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:14,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2025-03-13 21:48:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369401373] [2025-03-13 21:48:14,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:14,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:48:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:14,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:48:14,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:48:14,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:14,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 522 transitions, 8518 flow. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 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) [2025-03-13 21:48:14,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:14,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:14,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:16,276 INFO L124 PetriNetUnfolderBase]: 7678/10922 cut-off events. [2025-03-13 21:48:16,276 INFO L125 PetriNetUnfolderBase]: For 106064/106064 co-relation queries the response was YES. [2025-03-13 21:48:16,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68765 conditions, 10922 events. 7678/10922 cut-off events. For 106064/106064 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 57139 event pairs, 436 based on Foata normal form. 2/10924 useless extension candidates. Maximal degree in co-relation 68157. Up to 6802 conditions per place. [2025-03-13 21:48:16,352 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 644 selfloop transitions, 279 changer transitions 1/925 dead transitions. [2025-03-13 21:48:16,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 925 transitions, 16078 flow [2025-03-13 21:48:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:48:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:48:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2025-03-13 21:48:16,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49379652605459057 [2025-03-13 21:48:16,353 INFO L175 Difference]: Start difference. First operand has 177 places, 522 transitions, 8518 flow. Second operand 13 states and 199 transitions. [2025-03-13 21:48:16,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 925 transitions, 16078 flow [2025-03-13 21:48:17,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 925 transitions, 15491 flow, removed 265 selfloop flow, removed 4 redundant places. [2025-03-13 21:48:17,235 INFO L231 Difference]: Finished difference. Result has 192 places, 664 transitions, 10891 flow [2025-03-13 21:48:17,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=8092, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10891, PETRI_PLACES=192, PETRI_TRANSITIONS=664} [2025-03-13 21:48:17,236 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 159 predicate places. [2025-03-13 21:48:17,236 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 664 transitions, 10891 flow [2025-03-13 21:48:17,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 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) [2025-03-13 21:48:17,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:17,236 INFO L206 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] [2025-03-13 21:48:17,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:17,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-13 21:48:17,437 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:48:17,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:17,438 INFO L85 PathProgramCache]: Analyzing trace with hash -523516968, now seen corresponding path program 3 times [2025-03-13 21:48:17,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:17,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613767990] [2025-03-13 21:48:17,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:17,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:17,442 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:17,455 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:17,455 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:17,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:17,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:17,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613767990] [2025-03-13 21:48:17,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613767990] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:17,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524656756] [2025-03-13 21:48:17,721 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:17,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:17,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:17,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:17,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-13 21:48:17,764 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:17,781 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:17,782 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:17,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:17,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-13 21:48:17,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:17,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:48:17,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:48:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:18,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:18,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-03-13 21:48:18,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:48:18,193 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 70 treesize of output 62 [2025-03-13 21:48:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:18,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524656756] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:18,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:18,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2025-03-13 21:48:18,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159892530] [2025-03-13 21:48:18,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:18,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-13 21:48:18,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:18,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-13 21:48:18,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2025-03-13 21:48:18,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:18,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 664 transitions, 10891 flow. Second operand has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 states have internal predecessors, (153), 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) [2025-03-13 21:48:18,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:18,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:18,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:20,780 INFO L124 PetriNetUnfolderBase]: 9225/13143 cut-off events. [2025-03-13 21:48:20,780 INFO L125 PetriNetUnfolderBase]: For 145027/145027 co-relation queries the response was YES. [2025-03-13 21:48:20,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88994 conditions, 13143 events. 9225/13143 cut-off events. For 145027/145027 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 70873 event pairs, 911 based on Foata normal form. 3/13146 useless extension candidates. Maximal degree in co-relation 88442. Up to 10541 conditions per place. [2025-03-13 21:48:20,886 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 933 selfloop transitions, 274 changer transitions 2/1210 dead transitions. [2025-03-13 21:48:20,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1210 transitions, 21108 flow [2025-03-13 21:48:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-13 21:48:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-13 21:48:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 385 transitions. [2025-03-13 21:48:20,888 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2025-03-13 21:48:20,888 INFO L175 Difference]: Start difference. First operand has 192 places, 664 transitions, 10891 flow. Second operand 30 states and 385 transitions. [2025-03-13 21:48:20,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1210 transitions, 21108 flow [2025-03-13 21:48:22,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 1210 transitions, 20921 flow, removed 92 selfloop flow, removed 1 redundant places. [2025-03-13 21:48:22,175 INFO L231 Difference]: Finished difference. Result has 234 places, 831 transitions, 14471 flow [2025-03-13 21:48:22,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=10808, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=14471, PETRI_PLACES=234, PETRI_TRANSITIONS=831} [2025-03-13 21:48:22,175 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 201 predicate places. [2025-03-13 21:48:22,175 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 831 transitions, 14471 flow [2025-03-13 21:48:22,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 states have internal predecessors, (153), 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) [2025-03-13 21:48:22,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:22,176 INFO L206 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] [2025-03-13 21:48:22,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:22,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-13 21:48:22,376 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:48:22,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:22,377 INFO L85 PathProgramCache]: Analyzing trace with hash 740294115, now seen corresponding path program 2 times [2025-03-13 21:48:22,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:22,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935069136] [2025-03-13 21:48:22,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:48:22,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:22,381 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:22,391 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:22,391 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:22,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:22,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:22,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935069136] [2025-03-13 21:48:22,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935069136] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:22,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041421524] [2025-03-13 21:48:22,541 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:48:22,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:22,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:22,543 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:22,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-13 21:48:22,584 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:22,601 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:22,601 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:48:22,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:22,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:48:22,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:22,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:48:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:22,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:22,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:48:22,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2025-03-13 21:48:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:22,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041421524] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:22,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:22,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2025-03-13 21:48:22,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956751884] [2025-03-13 21:48:22,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:22,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:48:22,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:22,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:48:22,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:48:22,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:22,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 831 transitions, 14471 flow. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 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) [2025-03-13 21:48:22,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:22,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:22,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:25,495 INFO L124 PetriNetUnfolderBase]: 11252/16014 cut-off events. [2025-03-13 21:48:25,495 INFO L125 PetriNetUnfolderBase]: For 192651/192651 co-relation queries the response was YES. [2025-03-13 21:48:25,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112928 conditions, 16014 events. 11252/16014 cut-off events. For 192651/192651 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 89384 event pairs, 1144 based on Foata normal form. 2/16016 useless extension candidates. Maximal degree in co-relation 112179. Up to 12608 conditions per place. [2025-03-13 21:48:25,652 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 908 selfloop transitions, 311 changer transitions 1/1221 dead transitions. [2025-03-13 21:48:25,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 1221 transitions, 23052 flow [2025-03-13 21:48:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:48:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:48:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2025-03-13 21:48:25,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2025-03-13 21:48:25,654 INFO L175 Difference]: Start difference. First operand has 234 places, 831 transitions, 14471 flow. Second operand 12 states and 180 transitions. [2025-03-13 21:48:25,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 1221 transitions, 23052 flow [2025-03-13 21:48:27,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1221 transitions, 22405 flow, removed 264 selfloop flow, removed 5 redundant places. [2025-03-13 21:48:27,563 INFO L231 Difference]: Finished difference. Result has 245 places, 975 transitions, 17215 flow [2025-03-13 21:48:27,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=13967, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17215, PETRI_PLACES=245, PETRI_TRANSITIONS=975} [2025-03-13 21:48:27,563 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 212 predicate places. [2025-03-13 21:48:27,563 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 975 transitions, 17215 flow [2025-03-13 21:48:27,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 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) [2025-03-13 21:48:27,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:27,564 INFO L206 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] [2025-03-13 21:48:27,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:27,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-13 21:48:27,764 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:48:27,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash 442241157, now seen corresponding path program 3 times [2025-03-13 21:48:27,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:27,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467446247] [2025-03-13 21:48:27,765 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:27,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:27,770 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:27,777 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:27,777 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:27,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:27,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:27,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467446247] [2025-03-13 21:48:27,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467446247] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:27,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801026804] [2025-03-13 21:48:27,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:48:27,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:27,984 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:27,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-13 21:48:28,029 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:28,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:28,047 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:48:28,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:28,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:48:28,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:28,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:48:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:28,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:28,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:48:28,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2025-03-13 21:48:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:28,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801026804] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:28,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:28,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2025-03-13 21:48:28,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048766672] [2025-03-13 21:48:28,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:28,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-13 21:48:28,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:28,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-13 21:48:28,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-03-13 21:48:28,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:28,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 975 transitions, 17215 flow. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 19 states have internal predecessors, (129), 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) [2025-03-13 21:48:28,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:28,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:28,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:31,395 INFO L124 PetriNetUnfolderBase]: 12106/17227 cut-off events. [2025-03-13 21:48:31,395 INFO L125 PetriNetUnfolderBase]: For 226019/226019 co-relation queries the response was YES. [2025-03-13 21:48:31,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126117 conditions, 17227 events. 12106/17227 cut-off events. For 226019/226019 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 97482 event pairs, 1375 based on Foata normal form. 2/17229 useless extension candidates. Maximal degree in co-relation 125252. Up to 15245 conditions per place. [2025-03-13 21:48:31,677 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 1008 selfloop transitions, 191 changer transitions 1/1201 dead transitions. [2025-03-13 21:48:31,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1201 transitions, 23408 flow [2025-03-13 21:48:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:48:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:48:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2025-03-13 21:48:31,678 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2025-03-13 21:48:31,678 INFO L175 Difference]: Start difference. First operand has 245 places, 975 transitions, 17215 flow. Second operand 11 states and 165 transitions. [2025-03-13 21:48:31,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1201 transitions, 23408 flow [2025-03-13 21:48:34,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1201 transitions, 22948 flow, removed 111 selfloop flow, removed 4 redundant places. [2025-03-13 21:48:34,087 INFO L231 Difference]: Finished difference. Result has 255 places, 1010 transitions, 17988 flow [2025-03-13 21:48:34,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=16809, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17988, PETRI_PLACES=255, PETRI_TRANSITIONS=1010} [2025-03-13 21:48:34,088 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 222 predicate places. [2025-03-13 21:48:34,088 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 1010 transitions, 17988 flow [2025-03-13 21:48:34,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 19 states have internal predecessors, (129), 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) [2025-03-13 21:48:34,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:34,088 INFO L206 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] [2025-03-13 21:48:34,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-13 21:48:34,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-13 21:48:34,289 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:48:34,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:34,289 INFO L85 PathProgramCache]: Analyzing trace with hash 89303990, now seen corresponding path program 4 times [2025-03-13 21:48:34,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:34,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107431588] [2025-03-13 21:48:34,289 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:48:34,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:34,293 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:34,298 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:34,298 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:48:34,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:34,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:34,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107431588] [2025-03-13 21:48:34,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107431588] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:34,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219625805] [2025-03-13 21:48:34,513 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:48:34,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:34,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:34,515 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:34,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-13 21:48:34,560 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:34,577 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:34,577 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:48:34,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:34,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-13 21:48:34,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:34,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:48:34,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:48:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:34,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:35,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219625805] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:35,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:35,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 25 [2025-03-13 21:48:35,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035224739] [2025-03-13 21:48:35,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:35,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-13 21:48:35,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:35,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-13 21:48:35,024 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2025-03-13 21:48:35,024 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:35,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 1010 transitions, 17988 flow. Second operand has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 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) [2025-03-13 21:48:35,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:35,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:35,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:39,957 INFO L124 PetriNetUnfolderBase]: 14803/21132 cut-off events. [2025-03-13 21:48:39,957 INFO L125 PetriNetUnfolderBase]: For 291330/291330 co-relation queries the response was YES. [2025-03-13 21:48:40,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155703 conditions, 21132 events. 14803/21132 cut-off events. For 291330/291330 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 124461 event pairs, 1229 based on Foata normal form. 2/21134 useless extension candidates. Maximal degree in co-relation 154669. Up to 16824 conditions per place. [2025-03-13 21:48:40,183 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 1027 selfloop transitions, 526 changer transitions 1/1555 dead transitions. [2025-03-13 21:48:40,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1555 transitions, 29473 flow [2025-03-13 21:48:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-13 21:48:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-03-13 21:48:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 351 transitions. [2025-03-13 21:48:40,184 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36524453694068676 [2025-03-13 21:48:40,184 INFO L175 Difference]: Start difference. First operand has 255 places, 1010 transitions, 17988 flow. Second operand 31 states and 351 transitions. [2025-03-13 21:48:40,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1555 transitions, 29473 flow [2025-03-13 21:48:43,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1555 transitions, 29107 flow, removed 83 selfloop flow, removed 3 redundant places. [2025-03-13 21:48:43,275 INFO L231 Difference]: Finished difference. Result has 296 places, 1288 transitions, 23646 flow [2025-03-13 21:48:43,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=17745, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=23646, PETRI_PLACES=296, PETRI_TRANSITIONS=1288} [2025-03-13 21:48:43,276 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 263 predicate places. [2025-03-13 21:48:43,276 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 1288 transitions, 23646 flow [2025-03-13 21:48:43,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 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) [2025-03-13 21:48:43,276 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:43,276 INFO L206 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] [2025-03-13 21:48:43,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-13 21:48:43,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:43,481 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:48:43,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:43,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1524262744, now seen corresponding path program 5 times [2025-03-13 21:48:43,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:43,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879481004] [2025-03-13 21:48:43,481 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:48:43,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:43,485 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 3 equivalence classes. [2025-03-13 21:48:43,490 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:43,491 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:48:43,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:43,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:43,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879481004] [2025-03-13 21:48:43,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879481004] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:43,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023938932] [2025-03-13 21:48:43,645 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:48:43,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:43,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:43,647 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:43,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-13 21:48:43,688 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 3 equivalence classes. [2025-03-13 21:48:43,703 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:43,704 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:48:43,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:43,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-13 21:48:43,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:43,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:48:43,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:48:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:43,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:44,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-03-13 21:48:44,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:48:44,061 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 70 treesize of output 62 [2025-03-13 21:48:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:44,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023938932] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:44,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:44,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-03-13 21:48:44,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799676820] [2025-03-13 21:48:44,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:44,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:48:44,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:44,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:48:44,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:48:44,113 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:44,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1288 transitions, 23646 flow. Second operand has 22 states, 22 states have (on average 6.409090909090909) internal successors, (141), 22 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) [2025-03-13 21:48:44,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:44,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:44,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:48:49,978 INFO L124 PetriNetUnfolderBase]: 16959/24202 cut-off events. [2025-03-13 21:48:49,979 INFO L125 PetriNetUnfolderBase]: For 391179/391179 co-relation queries the response was YES. [2025-03-13 21:48:50,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194828 conditions, 24202 events. 16959/24202 cut-off events. For 391179/391179 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 145393 event pairs, 1838 based on Foata normal form. 2/24204 useless extension candidates. Maximal degree in co-relation 193911. Up to 20686 conditions per place. [2025-03-13 21:48:50,355 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 1393 selfloop transitions, 315 changer transitions 1/1710 dead transitions. [2025-03-13 21:48:50,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1710 transitions, 34694 flow [2025-03-13 21:48:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:48:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:48:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 174 transitions. [2025-03-13 21:48:50,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2025-03-13 21:48:50,356 INFO L175 Difference]: Start difference. First operand has 296 places, 1288 transitions, 23646 flow. Second operand 12 states and 174 transitions. [2025-03-13 21:48:50,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1710 transitions, 34694 flow [2025-03-13 21:48:55,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1710 transitions, 33226 flow, removed 589 selfloop flow, removed 5 redundant places. [2025-03-13 21:48:55,150 INFO L231 Difference]: Finished difference. Result has 307 places, 1405 transitions, 26121 flow [2025-03-13 21:48:55,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=22706, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=26121, PETRI_PLACES=307, PETRI_TRANSITIONS=1405} [2025-03-13 21:48:55,152 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 274 predicate places. [2025-03-13 21:48:55,152 INFO L471 AbstractCegarLoop]: Abstraction has has 307 places, 1405 transitions, 26121 flow [2025-03-13 21:48:55,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.409090909090909) internal successors, (141), 22 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) [2025-03-13 21:48:55,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:48:55,152 INFO L206 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] [2025-03-13 21:48:55,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-13 21:48:55,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:55,353 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:48:55,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:48:55,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1907184036, now seen corresponding path program 6 times [2025-03-13 21:48:55,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:48:55,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480425943] [2025-03-13 21:48:55,354 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:48:55,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:48:55,358 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:55,368 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:55,373 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:48:55,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:55,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:48:55,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480425943] [2025-03-13 21:48:55,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480425943] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:48:55,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623536862] [2025-03-13 21:48:55,590 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:48:55,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:48:55,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:48:55,592 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:48:55,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-13 21:48:55,634 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:48:55,648 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:48:55,648 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:48:55,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:48:55,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-13 21:48:55,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:48:55,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:48:55,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:48:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:48:55,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:48:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:48:55,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623536862] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:48:55,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:48:55,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 26 [2025-03-13 21:48:55,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682754943] [2025-03-13 21:48:55,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:48:55,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-13 21:48:55,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:48:55,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-13 21:48:55,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2025-03-13 21:48:55,935 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:48:55,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 1405 transitions, 26121 flow. Second operand has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 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) [2025-03-13 21:48:55,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:48:55,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:48:55,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:49:06,757 INFO L124 PetriNetUnfolderBase]: 23416/33593 cut-off events. [2025-03-13 21:49:06,758 INFO L125 PetriNetUnfolderBase]: For 557755/557755 co-relation queries the response was YES. [2025-03-13 21:49:07,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268289 conditions, 33593 events. 23416/33593 cut-off events. For 557755/557755 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 213970 event pairs, 1663 based on Foata normal form. 4/33597 useless extension candidates. Maximal degree in co-relation 266770. Up to 21911 conditions per place. [2025-03-13 21:49:07,239 INFO L140 encePairwiseOnDemand]: 13/31 looper letters, 1320 selfloop transitions, 1496 changer transitions 2/2819 dead transitions. [2025-03-13 21:49:07,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 2819 transitions, 53422 flow [2025-03-13 21:49:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2025-03-13 21:49:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2025-03-13 21:49:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1058 transitions. [2025-03-13 21:49:07,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3379112104758863 [2025-03-13 21:49:07,241 INFO L175 Difference]: Start difference. First operand has 307 places, 1405 transitions, 26121 flow. Second operand 101 states and 1058 transitions. [2025-03-13 21:49:07,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 2819 transitions, 53422 flow [2025-03-13 21:49:14,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 2819 transitions, 52630 flow, removed 331 selfloop flow, removed 4 redundant places. [2025-03-13 21:49:14,590 INFO L231 Difference]: Finished difference. Result has 429 places, 2375 transitions, 46562 flow [2025-03-13 21:49:14,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=25652, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=46562, PETRI_PLACES=429, PETRI_TRANSITIONS=2375} [2025-03-13 21:49:14,591 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 396 predicate places. [2025-03-13 21:49:14,591 INFO L471 AbstractCegarLoop]: Abstraction has has 429 places, 2375 transitions, 46562 flow [2025-03-13 21:49:14,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 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) [2025-03-13 21:49:14,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:49:14,592 INFO L206 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] [2025-03-13 21:49:14,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-13 21:49:14,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:49:14,792 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:49:14,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:49:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash -845202111, now seen corresponding path program 4 times [2025-03-13 21:49:14,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:49:14,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352143131] [2025-03-13 21:49:14,793 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:49:14,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:49:14,798 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:49:14,801 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:49:14,802 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:49:14,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:49:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:49:14,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:49:14,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352143131] [2025-03-13 21:49:14,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352143131] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:49:14,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834124957] [2025-03-13 21:49:14,984 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:49:14,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:49:14,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:49:14,990 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:49:14,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-13 21:49:15,034 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:49:15,051 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:49:15,051 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:49:15,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:49:15,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-13 21:49:15,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:49:15,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:49:15,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-13 21:49:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:49:15,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:49:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:49:15,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834124957] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:49:15,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:49:15,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 15 [2025-03-13 21:49:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128944698] [2025-03-13 21:49:15,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:49:15,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-13 21:49:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:49:15,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-13 21:49:15,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2025-03-13 21:49:15,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-13 21:49:15,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 2375 transitions, 46562 flow. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 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) [2025-03-13 21:49:15,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:49:15,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-13 21:49:15,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand