./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 8fc3dc66 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-?-8fc3dc6-m [2025-03-17 06:42:17,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:42:17,429 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:42:17,433 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:42:17,433 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:42:17,452 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:42:17,453 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:42:17,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:42:17,454 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:42:17,454 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:42:17,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:42:17,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:42:17,455 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:42:17,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:42:17,455 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:42:17,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:42:17,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:42:17,456 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:42:17,456 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:42:17,456 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:42:17,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:42:17,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:42:17,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:42:17,456 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:42:17,457 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:42:17,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:42:17,457 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:42:17,457 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:42:17,457 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:42:17,457 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:42:17,457 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:42:17,457 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:42:17,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:42:17,458 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:42:17,458 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:42:17,458 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:42:17,458 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:42:17,458 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:42:17,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:42:17,458 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:42:17,458 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:42:17,458 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:42:17,458 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:42:17,458 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 [2025-03-17 06:42:17,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:42:17,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:42:17,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:42:17,684 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:42:17,684 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:42:17,685 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2025-03-17 06:42:18,766 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84249eb95/9f0ab617515049489f62b0a5f9bcf64d/FLAG6cf417fe8 [2025-03-17 06:42:18,965 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:42:18,966 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2025-03-17 06:42:18,972 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84249eb95/9f0ab617515049489f62b0a5f9bcf64d/FLAG6cf417fe8 [2025-03-17 06:42:18,984 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84249eb95/9f0ab617515049489f62b0a5f9bcf64d [2025-03-17 06:42:18,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:42:18,989 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:42:18,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:42:18,991 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:42:18,994 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:42:18,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:18" (1/1) ... [2025-03-17 06:42:18,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4448f301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:18, skipping insertion in model container [2025-03-17 06:42:18,996 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:18" (1/1) ... [2025-03-17 06:42:19,012 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:42:19,138 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] [2025-03-17 06:42:19,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:42:19,158 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:42:19,175 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] [2025-03-17 06:42:19,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:42:19,195 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:42:19,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19 WrapperNode [2025-03-17 06:42:19,196 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:42:19,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:42:19,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:42:19,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:42:19,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,207 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,227 INFO L138 Inliner]: procedures = 22, calls = 24, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 172 [2025-03-17 06:42:19,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:42:19,230 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:42:19,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:42:19,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:42:19,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,239 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,250 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]. [2025-03-17 06:42:19,250 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,256 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,256 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,257 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,258 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,259 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:42:19,260 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:42:19,260 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:42:19,260 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:42:19,262 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (1/1) ... [2025-03-17 06:42:19,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:42:19,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:19,285 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) [2025-03-17 06:42:19,286 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 [2025-03-17 06:42:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:42:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:42:19,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:42:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:42:19,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:42:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 06:42:19,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 06:42:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:42:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:42:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:42:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:42:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:42:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:42:19,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:42:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:42:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:42:19,306 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:42:19,384 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:42:19,385 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:42:19,644 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:42:19,644 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:42:19,824 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:42:19,824 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:42:19,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:42:19 BoogieIcfgContainer [2025-03-17 06:42:19,825 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:42:19,828 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:42:19,828 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:42:19,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:42:19,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:42:18" (1/3) ... [2025-03-17 06:42:19,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edf43bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:19, skipping insertion in model container [2025-03-17 06:42:19,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:19" (2/3) ... [2025-03-17 06:42:19,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edf43bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:19, skipping insertion in model container [2025-03-17 06:42:19,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:42:19" (3/3) ... [2025-03-17 06:42:19,834 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2025-03-17 06:42:19,845 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:42:19,846 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. [2025-03-17 06:42:19,846 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:42:19,884 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 06:42:19,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2025-03-17 06:42:19,933 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2025-03-17 06:42:19,934 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:42:19,940 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 4. Compared 30 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. [2025-03-17 06:42:19,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2025-03-17 06:42:19,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2025-03-17 06:42:19,949 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:42:19,962 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;@57e1c660, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:42:19,962 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 06:42:19,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:42:19,976 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2025-03-17 06:42:19,976 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:42:19,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:19,977 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:19,977 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)] === [2025-03-17 06:42:19,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:19,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2106921177, now seen corresponding path program 1 times [2025-03-17 06:42:19,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:19,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378440676] [2025-03-17 06:42:19,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:20,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:42:20,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:42:20,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:20,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:20,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:20,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378440676] [2025-03-17 06:42:20,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378440676] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:20,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:20,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:42:20,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100659305] [2025-03-17 06:42:20,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:20,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:42:20,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:20,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:42:20,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:42:20,277 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:20,280 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) [2025-03-17 06:42:20,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:20,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:20,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:20,504 INFO L124 PetriNetUnfolderBase]: 817/1179 cut-off events. [2025-03-17 06:42:20,504 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2025-03-17 06:42:20,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 1179 events. 817/1179 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4401 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. [2025-03-17 06:42:20,516 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2025-03-17 06:42:20,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 215 flow [2025-03-17 06:42:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:42:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:42:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-17 06:42:20,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2025-03-17 06:42:20,526 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 3 states and 58 transitions. [2025-03-17 06:42:20,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 215 flow [2025-03-17 06:42:20,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 193 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 06:42:20,536 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 86 flow [2025-03-17 06:42:20,538 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} [2025-03-17 06:42:20,541 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2025-03-17 06:42:20,541 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 86 flow [2025-03-17 06:42:20,543 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) [2025-03-17 06:42:20,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:20,543 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] [2025-03-17 06:42:20,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:42:20,543 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)] === [2025-03-17 06:42:20,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1836782945, now seen corresponding path program 1 times [2025-03-17 06:42:20,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:20,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831327369] [2025-03-17 06:42:20,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:20,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:20,556 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 06:42:20,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:42:20,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:20,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:20,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:20,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831327369] [2025-03-17 06:42:20,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831327369] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:20,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:20,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:42:20,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865935891] [2025-03-17 06:42:20,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:20,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:42:20,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:20,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:42:20,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:42:20,727 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:20,728 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) [2025-03-17 06:42:20,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:20,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:20,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:20,966 INFO L124 PetriNetUnfolderBase]: 1511/2222 cut-off events. [2025-03-17 06:42:20,966 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2025-03-17 06:42:20,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 2222 events. 1511/2222 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9662 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. [2025-03-17 06:42:20,975 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 67 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2025-03-17 06:42:20,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 73 transitions, 346 flow [2025-03-17 06:42:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:42:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:42:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2025-03-17 06:42:20,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5548387096774193 [2025-03-17 06:42:20,977 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 86 flow. Second operand 5 states and 86 transitions. [2025-03-17 06:42:20,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 73 transitions, 346 flow [2025-03-17 06:42:20,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:20,978 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 120 flow [2025-03-17 06:42:20,978 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} [2025-03-17 06:42:20,979 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2025-03-17 06:42:20,979 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 120 flow [2025-03-17 06:42:20,979 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) [2025-03-17 06:42:20,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:20,979 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] [2025-03-17 06:42:20,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:42:20,979 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)] === [2025-03-17 06:42:20,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2140207265, now seen corresponding path program 1 times [2025-03-17 06:42:20,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:20,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854379226] [2025-03-17 06:42:20,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:20,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:20,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:42:20,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:20,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:20,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:21,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854379226] [2025-03-17 06:42:21,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854379226] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230631516] [2025-03-17 06:42:21,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:21,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:21,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:21,125 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) [2025-03-17 06:42:21,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:42:21,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:42:21,191 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:21,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:21,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:21,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:42:21,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:21,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:21,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230631516] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:21,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:42:21,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2025-03-17 06:42:21,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275040476] [2025-03-17 06:42:21,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:21,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:42:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:21,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:42:21,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:42:21,355 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:21,356 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) [2025-03-17 06:42:21,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:21,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:21,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:21,800 INFO L124 PetriNetUnfolderBase]: 1896/2781 cut-off events. [2025-03-17 06:42:21,800 INFO L125 PetriNetUnfolderBase]: For 1418/1418 co-relation queries the response was YES. [2025-03-17 06:42:21,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6988 conditions, 2781 events. 1896/2781 cut-off events. For 1418/1418 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12454 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. [2025-03-17 06:42:21,826 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 114 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2025-03-17 06:42:21,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 133 transitions, 701 flow [2025-03-17 06:42:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:42:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:42:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2025-03-17 06:42:21,829 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5129032258064516 [2025-03-17 06:42:21,829 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 120 flow. Second operand 10 states and 159 transitions. [2025-03-17 06:42:21,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 133 transitions, 701 flow [2025-03-17 06:42:21,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 133 transitions, 697 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:21,834 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 225 flow [2025-03-17 06:42:21,834 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} [2025-03-17 06:42:21,835 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2025-03-17 06:42:21,835 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 225 flow [2025-03-17 06:42:21,835 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) [2025-03-17 06:42:21,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:21,835 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] [2025-03-17 06:42:21,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:42:22,035 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 [2025-03-17 06:42:22,037 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)] === [2025-03-17 06:42:22,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1413163055, now seen corresponding path program 2 times [2025-03-17 06:42:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:22,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546643341] [2025-03-17 06:42:22,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:42:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:22,046 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:22,062 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:22,062 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:42:22,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:22,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546643341] [2025-03-17 06:42:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546643341] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886856673] [2025-03-17 06:42:22,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:42:22,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:22,190 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) [2025-03-17 06:42:22,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:42:22,246 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:22,270 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:22,270 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:42:22,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:22,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:42:22,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:22,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:22,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886856673] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:22,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:42:22,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2025-03-17 06:42:22,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340769266] [2025-03-17 06:42:22,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:22,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:42:22,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:22,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:42:22,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:42:22,416 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:22,416 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) [2025-03-17 06:42:22,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:22,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:22,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:22,863 INFO L124 PetriNetUnfolderBase]: 2183/3200 cut-off events. [2025-03-17 06:42:22,863 INFO L125 PetriNetUnfolderBase]: For 3321/3321 co-relation queries the response was YES. [2025-03-17 06:42:22,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9930 conditions, 3200 events. 2183/3200 cut-off events. For 3321/3321 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14404 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. [2025-03-17 06:42:22,879 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 124 selfloop transitions, 37 changer transitions 0/162 dead transitions. [2025-03-17 06:42:22,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 162 transitions, 1027 flow [2025-03-17 06:42:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:42:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:42:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2025-03-17 06:42:22,880 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47043010752688175 [2025-03-17 06:42:22,881 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 225 flow. Second operand 12 states and 175 transitions. [2025-03-17 06:42:22,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 162 transitions, 1027 flow [2025-03-17 06:42:22,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 162 transitions, 1024 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:22,894 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 491 flow [2025-03-17 06:42:22,894 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} [2025-03-17 06:42:22,895 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2025-03-17 06:42:22,895 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 491 flow [2025-03-17 06:42:22,895 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) [2025-03-17 06:42:22,895 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:22,895 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] [2025-03-17 06:42:22,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:42:23,099 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 [2025-03-17 06:42:23,099 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)] === [2025-03-17 06:42:23,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash -637092817, now seen corresponding path program 3 times [2025-03-17 06:42:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:23,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137942973] [2025-03-17 06:42:23,100 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:42:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:23,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:23,128 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:23,128 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:42:23,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:23,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:23,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137942973] [2025-03-17 06:42:23,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137942973] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:23,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485702376] [2025-03-17 06:42:23,213 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:42:23,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:23,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:23,216 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) [2025-03-17 06:42:23,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:42:23,260 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:23,277 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:23,277 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:42:23,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:23,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:42:23,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:23,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:23,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485702376] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:23,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:42:23,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-03-17 06:42:23,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120358721] [2025-03-17 06:42:23,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:23,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:42:23,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:23,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:42:23,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:42:23,421 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:23,421 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) [2025-03-17 06:42:23,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:23,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:23,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:23,928 INFO L124 PetriNetUnfolderBase]: 2708/3961 cut-off events. [2025-03-17 06:42:23,928 INFO L125 PetriNetUnfolderBase]: For 9030/9030 co-relation queries the response was YES. [2025-03-17 06:42:23,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14911 conditions, 3961 events. 2708/3961 cut-off events. For 9030/9030 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18297 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. [2025-03-17 06:42:23,950 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 130 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2025-03-17 06:42:23,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 187 transitions, 1443 flow [2025-03-17 06:42:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:42:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:42:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2025-03-17 06:42:23,951 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.530791788856305 [2025-03-17 06:42:23,951 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 491 flow. Second operand 11 states and 181 transitions. [2025-03-17 06:42:23,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 187 transitions, 1443 flow [2025-03-17 06:42:23,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 187 transitions, 1394 flow, removed 17 selfloop flow, removed 3 redundant places. [2025-03-17 06:42:23,984 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 857 flow [2025-03-17 06:42:23,984 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} [2025-03-17 06:42:23,985 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2025-03-17 06:42:23,985 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 857 flow [2025-03-17 06:42:23,985 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) [2025-03-17 06:42:23,985 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:23,985 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] [2025-03-17 06:42:23,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 06:42:24,185 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 [2025-03-17 06:42:24,186 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)] === [2025-03-17 06:42:24,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1270363491, now seen corresponding path program 4 times [2025-03-17 06:42:24,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:24,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934708917] [2025-03-17 06:42:24,186 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:42:24,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:24,191 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:24,196 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:24,196 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:42:24,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:24,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:24,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934708917] [2025-03-17 06:42:24,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934708917] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:24,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84934902] [2025-03-17 06:42:24,259 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:42:24,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:24,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:24,261 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) [2025-03-17 06:42:24,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:42:24,304 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:24,319 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:24,319 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:42:24,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:24,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:42:24,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:24,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:24,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84934902] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:24,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:42:24,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-03-17 06:42:24,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835030610] [2025-03-17 06:42:24,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:24,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:42:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:24,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:42:24,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:42:24,438 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:24,438 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) [2025-03-17 06:42:24,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:24,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:24,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:24,969 INFO L124 PetriNetUnfolderBase]: 2786/4077 cut-off events. [2025-03-17 06:42:24,969 INFO L125 PetriNetUnfolderBase]: For 14200/14200 co-relation queries the response was YES. [2025-03-17 06:42:24,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17264 conditions, 4077 events. 2786/4077 cut-off events. For 14200/14200 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19012 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. [2025-03-17 06:42:24,993 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 126 selfloop transitions, 55 changer transitions 0/182 dead transitions. [2025-03-17 06:42:24,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 182 transitions, 1645 flow [2025-03-17 06:42:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:42:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:42:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2025-03-17 06:42:24,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5290322580645161 [2025-03-17 06:42:24,994 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 857 flow. Second operand 10 states and 164 transitions. [2025-03-17 06:42:24,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 182 transitions, 1645 flow [2025-03-17 06:42:25,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 182 transitions, 1576 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-03-17 06:42:25,040 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 1056 flow [2025-03-17 06:42:25,040 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} [2025-03-17 06:42:25,041 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2025-03-17 06:42:25,041 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 1056 flow [2025-03-17 06:42:25,041 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) [2025-03-17 06:42:25,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:25,041 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] [2025-03-17 06:42:25,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 06:42:25,241 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 [2025-03-17 06:42:25,242 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)] === [2025-03-17 06:42:25,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash -508395697, now seen corresponding path program 5 times [2025-03-17 06:42:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:25,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625148552] [2025-03-17 06:42:25,242 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:42:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:25,248 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:25,254 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:25,254 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:42:25,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:25,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625148552] [2025-03-17 06:42:25,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625148552] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095057676] [2025-03-17 06:42:25,321 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:42:25,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:25,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:25,323 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) [2025-03-17 06:42:25,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:42:25,364 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:25,378 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:25,379 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:42:25,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:25,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 06:42:25,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:25,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:25,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095057676] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:42:25,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:42:25,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2025-03-17 06:42:25,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270560066] [2025-03-17 06:42:25,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:42:25,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:42:25,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:25,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:42:25,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:42:25,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:25,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 1056 flow. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 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) [2025-03-17 06:42:25,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:25,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:25,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:26,558 INFO L124 PetriNetUnfolderBase]: 3332/4831 cut-off events. [2025-03-17 06:42:26,558 INFO L125 PetriNetUnfolderBase]: For 20168/20168 co-relation queries the response was YES. [2025-03-17 06:42:26,571 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 223. Compared 23271 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. [2025-03-17 06:42:26,589 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 240 selfloop transitions, 166 changer transitions 0/407 dead transitions. [2025-03-17 06:42:26,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 407 transitions, 4100 flow [2025-03-17 06:42:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 06:42:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-17 06:42:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 378 transitions. [2025-03-17 06:42:26,592 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2025-03-17 06:42:26,592 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 1056 flow. Second operand 27 states and 378 transitions. [2025-03-17 06:42:26,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 407 transitions, 4100 flow [2025-03-17 06:42:26,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 407 transitions, 3999 flow, removed 28 selfloop flow, removed 4 redundant places. [2025-03-17 06:42:26,731 INFO L231 Difference]: Finished difference. Result has 121 places, 217 transitions, 2765 flow [2025-03-17 06:42:26,732 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} [2025-03-17 06:42:26,732 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 88 predicate places. [2025-03-17 06:42:26,732 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 217 transitions, 2765 flow [2025-03-17 06:42:26,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 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) [2025-03-17 06:42:26,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:26,733 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] [2025-03-17 06:42:26,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 06:42:26,933 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 [2025-03-17 06:42:26,933 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)] === [2025-03-17 06:42:26,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1693075637, now seen corresponding path program 6 times [2025-03-17 06:42:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:26,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422963773] [2025-03-17 06:42:26,934 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:42:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:26,942 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:26,951 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:26,951 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:42:26,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:27,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:27,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422963773] [2025-03-17 06:42:27,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422963773] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:27,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472776049] [2025-03-17 06:42:27,042 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:42:27,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:27,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:27,044 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) [2025-03-17 06:42:27,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:42:27,083 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:42:27,098 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:42:27,098 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:42:27,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:27,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:42:27,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:27,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:27,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472776049] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:27,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:42:27,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2025-03-17 06:42:27,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173540034] [2025-03-17 06:42:27,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:27,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:42:27,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:27,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:42:27,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:42:27,223 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:27,223 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) [2025-03-17 06:42:27,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:27,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:27,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:27,947 INFO L124 PetriNetUnfolderBase]: 3377/4888 cut-off events. [2025-03-17 06:42:27,947 INFO L125 PetriNetUnfolderBase]: For 30931/30931 co-relation queries the response was YES. [2025-03-17 06:42:27,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24395 conditions, 4888 events. 3377/4888 cut-off events. For 30931/30931 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23196 event pairs, 498 based on Foata normal form. 12/4900 useless extension candidates. Maximal degree in co-relation 22621. Up to 1124 conditions per place. [2025-03-17 06:42:27,986 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 175 selfloop transitions, 135 changer transitions 0/311 dead transitions. [2025-03-17 06:42:27,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 311 transitions, 3872 flow [2025-03-17 06:42:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:42:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:42:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2025-03-17 06:42:27,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48655913978494625 [2025-03-17 06:42:27,987 INFO L175 Difference]: Start difference. First operand has 121 places, 217 transitions, 2765 flow. Second operand 12 states and 181 transitions. [2025-03-17 06:42:27,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 311 transitions, 3872 flow [2025-03-17 06:42:28,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 311 transitions, 3732 flow, removed 56 selfloop flow, removed 3 redundant places. [2025-03-17 06:42:28,163 INFO L231 Difference]: Finished difference. Result has 132 places, 222 transitions, 3134 flow [2025-03-17 06:42:28,163 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} [2025-03-17 06:42:28,164 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 99 predicate places. [2025-03-17 06:42:28,164 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 222 transitions, 3134 flow [2025-03-17 06:42:28,164 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) [2025-03-17 06:42:28,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:28,164 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] [2025-03-17 06:42:28,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 06:42:28,368 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 [2025-03-17 06:42:28,368 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)] === [2025-03-17 06:42:28,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 3790707, now seen corresponding path program 1 times [2025-03-17 06:42:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404307977] [2025-03-17 06:42:28,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:28,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:28,374 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:42:28,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:42:28,378 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:28,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:28,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:28,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404307977] [2025-03-17 06:42:28,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404307977] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:28,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:28,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:42:28,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817797260] [2025-03-17 06:42:28,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:28,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:42:28,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:28,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:42:28,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:42:28,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:28,447 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) [2025-03-17 06:42:28,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:28,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:28,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:28,809 INFO L124 PetriNetUnfolderBase]: 2806/4081 cut-off events. [2025-03-17 06:42:28,810 INFO L125 PetriNetUnfolderBase]: For 35521/35521 co-relation queries the response was YES. [2025-03-17 06:42:28,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22001 conditions, 4081 events. 2806/4081 cut-off events. For 35521/35521 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18891 event pairs, 1109 based on Foata normal form. 83/4164 useless extension candidates. Maximal degree in co-relation 20377. Up to 3415 conditions per place. [2025-03-17 06:42:28,832 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 223 selfloop transitions, 7 changer transitions 0/231 dead transitions. [2025-03-17 06:42:28,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 231 transitions, 3581 flow [2025-03-17 06:42:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:42:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:42:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2025-03-17 06:42:28,834 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2025-03-17 06:42:28,834 INFO L175 Difference]: Start difference. First operand has 132 places, 222 transitions, 3134 flow. Second operand 5 states and 79 transitions. [2025-03-17 06:42:28,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 231 transitions, 3581 flow [2025-03-17 06:42:28,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 231 transitions, 3456 flow, removed 11 selfloop flow, removed 7 redundant places. [2025-03-17 06:42:28,952 INFO L231 Difference]: Finished difference. Result has 122 places, 201 transitions, 2870 flow [2025-03-17 06:42:28,953 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} [2025-03-17 06:42:28,953 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2025-03-17 06:42:28,953 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 201 transitions, 2870 flow [2025-03-17 06:42:28,953 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) [2025-03-17 06:42:28,953 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:28,953 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] [2025-03-17 06:42:28,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:42:28,954 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)] === [2025-03-17 06:42:28,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2146650134, now seen corresponding path program 1 times [2025-03-17 06:42:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:28,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860192909] [2025-03-17 06:42:28,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:28,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:28,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:42:28,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:42:28,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:28,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:29,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:29,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860192909] [2025-03-17 06:42:29,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860192909] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:29,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:29,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:42:29,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137097019] [2025-03-17 06:42:29,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:29,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:42:29,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:29,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:42:29,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:42:29,006 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:29,006 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) [2025-03-17 06:42:29,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:29,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:29,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:29,310 INFO L124 PetriNetUnfolderBase]: 2517/3634 cut-off events. [2025-03-17 06:42:29,310 INFO L125 PetriNetUnfolderBase]: For 32032/32032 co-relation queries the response was YES. [2025-03-17 06:42:29,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20018 conditions, 3634 events. 2517/3634 cut-off events. For 32032/32032 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15919 event pairs, 1021 based on Foata normal form. 22/3656 useless extension candidates. Maximal degree in co-relation 19262. Up to 3415 conditions per place. [2025-03-17 06:42:29,328 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 183 selfloop transitions, 2 changer transitions 23/209 dead transitions. [2025-03-17 06:42:29,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 209 transitions, 3294 flow [2025-03-17 06:42:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:42:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:42:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2025-03-17 06:42:29,330 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2025-03-17 06:42:29,330 INFO L175 Difference]: Start difference. First operand has 122 places, 201 transitions, 2870 flow. Second operand 5 states and 71 transitions. [2025-03-17 06:42:29,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 209 transitions, 3294 flow [2025-03-17 06:42:29,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 209 transitions, 3157 flow, removed 12 selfloop flow, removed 9 redundant places. [2025-03-17 06:42:29,450 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2651 flow [2025-03-17 06:42:29,451 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} [2025-03-17 06:42:29,452 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2025-03-17 06:42:29,452 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2651 flow [2025-03-17 06:42:29,452 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) [2025-03-17 06:42:29,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:29,453 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] [2025-03-17 06:42:29,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 06:42:29,453 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)] === [2025-03-17 06:42:29,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:29,454 INFO L85 PathProgramCache]: Analyzing trace with hash 38019929, now seen corresponding path program 1 times [2025-03-17 06:42:29,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:29,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413845499] [2025-03-17 06:42:29,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:29,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:29,460 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:42:29,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:42:29,465 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:29,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:29,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:29,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413845499] [2025-03-17 06:42:29,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413845499] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:29,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766133963] [2025-03-17 06:42:29,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:29,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:29,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:29,525 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) [2025-03-17 06:42:29,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:42:29,573 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:42:29,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:42:29,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:29,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:29,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 06:42:29,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:29,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:29,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766133963] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:29,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:42:29,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-03-17 06:42:29,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422783597] [2025-03-17 06:42:29,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:29,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:42:29,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:29,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:42:29,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:42:29,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:29,643 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) [2025-03-17 06:42:29,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:29,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:29,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:29,968 INFO L124 PetriNetUnfolderBase]: 2615/3717 cut-off events. [2025-03-17 06:42:29,968 INFO L125 PetriNetUnfolderBase]: For 31784/31784 co-relation queries the response was YES. [2025-03-17 06:42:29,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20462 conditions, 3717 events. 2615/3717 cut-off events. For 31784/31784 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16216 event pairs, 746 based on Foata normal form. 248/3965 useless extension candidates. Maximal degree in co-relation 20410. Up to 2853 conditions per place. [2025-03-17 06:42:29,987 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 267 selfloop transitions, 13 changer transitions 0/281 dead transitions. [2025-03-17 06:42:29,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 281 transitions, 4638 flow [2025-03-17 06:42:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:42:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:42:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-03-17 06:42:29,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2025-03-17 06:42:29,988 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2651 flow. Second operand 5 states and 64 transitions. [2025-03-17 06:42:29,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 281 transitions, 4638 flow [2025-03-17 06:42:30,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 281 transitions, 4551 flow, removed 17 selfloop flow, removed 6 redundant places. [2025-03-17 06:42:30,098 INFO L231 Difference]: Finished difference. Result has 108 places, 187 transitions, 2649 flow [2025-03-17 06:42:30,098 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} [2025-03-17 06:42:30,099 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 75 predicate places. [2025-03-17 06:42:30,099 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 187 transitions, 2649 flow [2025-03-17 06:42:30,099 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) [2025-03-17 06:42:30,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:30,099 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] [2025-03-17 06:42:30,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 06:42:30,303 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 [2025-03-17 06:42:30,303 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)] === [2025-03-17 06:42:30,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:30,303 INFO L85 PathProgramCache]: Analyzing trace with hash 693520811, now seen corresponding path program 1 times [2025-03-17 06:42:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:30,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879058387] [2025-03-17 06:42:30,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:30,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:30,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:42:30,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:30,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:30,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879058387] [2025-03-17 06:42:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879058387] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113672811] [2025-03-17 06:42:30,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:30,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:30,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:30,555 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) [2025-03-17 06:42:30,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:42:30,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:42:30,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:30,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:30,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:30,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 06:42:30,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:30,689 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 [2025-03-17 06:42:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:30,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:30,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:42:30,755 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 [2025-03-17 06:42:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:30,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113672811] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:42:30,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:42:30,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2025-03-17 06:42:30,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543144743] [2025-03-17 06:42:30,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:42:30,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 06:42:30,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:30,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 06:42:30,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2025-03-17 06:42:30,786 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:30,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 187 transitions, 2649 flow. Second operand has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 18 states have internal predecessors, (121), 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) [2025-03-17 06:42:30,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:30,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:30,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:31,518 INFO L124 PetriNetUnfolderBase]: 3843/5471 cut-off events. [2025-03-17 06:42:31,518 INFO L125 PetriNetUnfolderBase]: For 42099/42099 co-relation queries the response was YES. [2025-03-17 06:42:31,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29691 conditions, 5471 events. 3843/5471 cut-off events. For 42099/42099 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25883 event pairs, 225 based on Foata normal form. 2/5473 useless extension candidates. Maximal degree in co-relation 29635. Up to 3758 conditions per place. [2025-03-17 06:42:31,550 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 400 selfloop transitions, 118 changer transitions 1/520 dead transitions. [2025-03-17 06:42:31,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 520 transitions, 7866 flow [2025-03-17 06:42:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 06:42:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 06:42:31,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2025-03-17 06:42:31,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49379652605459057 [2025-03-17 06:42:31,551 INFO L175 Difference]: Start difference. First operand has 108 places, 187 transitions, 2649 flow. Second operand 13 states and 199 transitions. [2025-03-17 06:42:31,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 520 transitions, 7866 flow [2025-03-17 06:42:31,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 520 transitions, 7836 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-17 06:42:31,741 INFO L231 Difference]: Finished difference. Result has 122 places, 301 transitions, 4688 flow [2025-03-17 06:42:31,742 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=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4688, PETRI_PLACES=122, PETRI_TRANSITIONS=301} [2025-03-17 06:42:31,742 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2025-03-17 06:42:31,742 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 301 transitions, 4688 flow [2025-03-17 06:42:31,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 18 states have internal predecessors, (121), 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) [2025-03-17 06:42:31,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:31,742 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] [2025-03-17 06:42:31,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 06:42:31,943 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 [2025-03-17 06:42:31,943 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)] === [2025-03-17 06:42:31,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:31,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1452519768, now seen corresponding path program 1 times [2025-03-17 06:42:31,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:31,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192471879] [2025-03-17 06:42:31,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:31,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:31,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:42:31,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:31,963 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:31,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:32,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192471879] [2025-03-17 06:42:32,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192471879] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186422006] [2025-03-17 06:42:32,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:32,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:32,273 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) [2025-03-17 06:42:32,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 06:42:32,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:42:32,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:32,328 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:32,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:32,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 06:42:32,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:32,356 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 [2025-03-17 06:42:32,494 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 [2025-03-17 06:42:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:32,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:32,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186422006] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:42:32,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:42:32,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2025-03-17 06:42:32,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945554174] [2025-03-17 06:42:32,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:42:32,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 06:42:32,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:32,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 06:42:32,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2025-03-17 06:42:32,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:32,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 301 transitions, 4688 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) [2025-03-17 06:42:32,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:32,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:32,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:34,601 INFO L124 PetriNetUnfolderBase]: 6375/9056 cut-off events. [2025-03-17 06:42:34,602 INFO L125 PetriNetUnfolderBase]: For 72248/72248 co-relation queries the response was YES. [2025-03-17 06:42:34,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51788 conditions, 9056 events. 6375/9056 cut-off events. For 72248/72248 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 45866 event pairs, 412 based on Foata normal form. 2/9058 useless extension candidates. Maximal degree in co-relation 48668. Up to 5693 conditions per place. [2025-03-17 06:42:34,723 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 579 selfloop transitions, 376 changer transitions 1/957 dead transitions. [2025-03-17 06:42:34,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 957 transitions, 14321 flow [2025-03-17 06:42:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-17 06:42:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-03-17 06:42:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 476 transitions. [2025-03-17 06:42:34,725 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2025-03-17 06:42:34,725 INFO L175 Difference]: Start difference. First operand has 122 places, 301 transitions, 4688 flow. Second operand 42 states and 476 transitions. [2025-03-17 06:42:34,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 957 transitions, 14321 flow [2025-03-17 06:42:35,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 957 transitions, 14157 flow, removed 56 selfloop flow, removed 2 redundant places. [2025-03-17 06:42:35,147 INFO L231 Difference]: Finished difference. Result has 180 places, 639 transitions, 10425 flow [2025-03-17 06:42:35,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10425, PETRI_PLACES=180, PETRI_TRANSITIONS=639} [2025-03-17 06:42:35,147 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 147 predicate places. [2025-03-17 06:42:35,147 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 639 transitions, 10425 flow [2025-03-17 06:42:35,148 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) [2025-03-17 06:42:35,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:35,148 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] [2025-03-17 06:42:35,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 06:42:35,348 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 [2025-03-17 06:42:35,349 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)] === [2025-03-17 06:42:35,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1515886766, now seen corresponding path program 2 times [2025-03-17 06:42:35,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:35,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342516191] [2025-03-17 06:42:35,349 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:42:35,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:35,357 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:42:35,368 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:35,372 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:42:35,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:35,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342516191] [2025-03-17 06:42:35,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342516191] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854020151] [2025-03-17 06:42:35,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:42:35,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:35,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:35,609 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) [2025-03-17 06:42:35,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 06:42:35,653 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:42:35,670 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:35,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:42:35,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:35,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 06:42:35,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:35,689 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 [2025-03-17 06:42:35,818 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 [2025-03-17 06:42:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:35,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:35,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854020151] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:42:35,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:42:35,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2025-03-17 06:42:35,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393319804] [2025-03-17 06:42:35,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:42:35,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 06:42:35,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:35,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 06:42:35,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2025-03-17 06:42:35,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:35,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 639 transitions, 10425 flow. Second operand has 25 states, 25 states have (on average 6.12) internal successors, (153), 25 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) [2025-03-17 06:42:35,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:35,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:35,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:37,912 INFO L124 PetriNetUnfolderBase]: 7089/10095 cut-off events. [2025-03-17 06:42:37,912 INFO L125 PetriNetUnfolderBase]: For 100702/100702 co-relation queries the response was YES. [2025-03-17 06:42:37,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64303 conditions, 10095 events. 7089/10095 cut-off events. For 100702/100702 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 52621 event pairs, 364 based on Foata normal form. 1/10096 useless extension candidates. Maximal degree in co-relation 62713. Up to 6629 conditions per place. [2025-03-17 06:42:37,992 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 641 selfloop transitions, 338 changer transitions 1/981 dead transitions. [2025-03-17 06:42:37,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 981 transitions, 16690 flow [2025-03-17 06:42:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 06:42:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 06:42:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 273 transitions. [2025-03-17 06:42:37,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4403225806451613 [2025-03-17 06:42:37,994 INFO L175 Difference]: Start difference. First operand has 180 places, 639 transitions, 10425 flow. Second operand 20 states and 273 transitions. [2025-03-17 06:42:37,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 981 transitions, 16690 flow [2025-03-17 06:42:38,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 981 transitions, 16425 flow, removed 130 selfloop flow, removed 2 redundant places. [2025-03-17 06:42:39,002 INFO L231 Difference]: Finished difference. Result has 204 places, 736 transitions, 12370 flow [2025-03-17 06:42:39,002 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=10202, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12370, PETRI_PLACES=204, PETRI_TRANSITIONS=736} [2025-03-17 06:42:39,003 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 171 predicate places. [2025-03-17 06:42:39,003 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 736 transitions, 12370 flow [2025-03-17 06:42:39,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.12) internal successors, (153), 25 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) [2025-03-17 06:42:39,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:39,004 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] [2025-03-17 06:42:39,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 06:42:39,204 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 [2025-03-17 06:42:39,205 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)] === [2025-03-17 06:42:39,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:39,205 INFO L85 PathProgramCache]: Analyzing trace with hash -44090648, now seen corresponding path program 3 times [2025-03-17 06:42:39,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:39,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872907837] [2025-03-17 06:42:39,205 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:42:39,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:39,212 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:42:39,221 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:39,221 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:42:39,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:39,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:39,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872907837] [2025-03-17 06:42:39,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872907837] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:39,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446553499] [2025-03-17 06:42:39,513 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:42:39,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:39,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:39,515 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) [2025-03-17 06:42:39,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 06:42:39,561 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:42:39,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:39,578 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:42:39,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:39,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 06:42:39,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:39,606 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 [2025-03-17 06:42:39,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:42:39,719 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 17 treesize of output 15 [2025-03-17 06:42:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:39,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:39,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446553499] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:42:39,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:42:39,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 22 [2025-03-17 06:42:39,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630937135] [2025-03-17 06:42:39,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:42:39,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 06:42:39,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:39,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 06:42:39,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2025-03-17 06:42:39,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:39,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 736 transitions, 12370 flow. Second operand has 23 states, 23 states have (on average 6.173913043478261) internal successors, (142), 23 states have internal predecessors, (142), 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) [2025-03-17 06:42:39,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:39,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:39,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:44,339 INFO L124 PetriNetUnfolderBase]: 10859/15536 cut-off events. [2025-03-17 06:42:44,340 INFO L125 PetriNetUnfolderBase]: For 162401/162401 co-relation queries the response was YES. [2025-03-17 06:42:44,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102648 conditions, 15536 events. 10859/15536 cut-off events. For 162401/162401 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 87448 event pairs, 403 based on Foata normal form. 1/15537 useless extension candidates. Maximal degree in co-relation 102212. Up to 6977 conditions per place. [2025-03-17 06:42:44,468 INFO L140 encePairwiseOnDemand]: 13/31 looper letters, 757 selfloop transitions, 1145 changer transitions 1/1904 dead transitions. [2025-03-17 06:42:44,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1904 transitions, 30657 flow [2025-03-17 06:42:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2025-03-17 06:42:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2025-03-17 06:42:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 994 transitions. [2025-03-17 06:42:44,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3772296015180266 [2025-03-17 06:42:44,471 INFO L175 Difference]: Start difference. First operand has 204 places, 736 transitions, 12370 flow. Second operand 85 states and 994 transitions. [2025-03-17 06:42:44,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1904 transitions, 30657 flow [2025-03-17 06:42:46,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1904 transitions, 29732 flow, removed 141 selfloop flow, removed 5 redundant places. [2025-03-17 06:42:46,471 INFO L231 Difference]: Finished difference. Result has 311 places, 1431 transitions, 25505 flow [2025-03-17 06:42:46,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=11776, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=25505, PETRI_PLACES=311, PETRI_TRANSITIONS=1431} [2025-03-17 06:42:46,472 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 278 predicate places. [2025-03-17 06:42:46,472 INFO L471 AbstractCegarLoop]: Abstraction has has 311 places, 1431 transitions, 25505 flow [2025-03-17 06:42:46,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.173913043478261) internal successors, (142), 23 states have internal predecessors, (142), 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) [2025-03-17 06:42:46,472 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:46,472 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] [2025-03-17 06:42:46,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 06:42:46,673 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 [2025-03-17 06:42:46,673 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)] === [2025-03-17 06:42:46,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:46,674 INFO L85 PathProgramCache]: Analyzing trace with hash -645919330, now seen corresponding path program 4 times [2025-03-17 06:42:46,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:46,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126435571] [2025-03-17 06:42:46,674 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:42:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:46,680 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:42:46,687 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:46,687 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:42:46,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:46,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:46,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126435571] [2025-03-17 06:42:46,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126435571] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:46,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642642886] [2025-03-17 06:42:46,951 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:42:46,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:46,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:46,953 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) [2025-03-17 06:42:46,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 06:42:46,999 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:42:47,017 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:47,018 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:42:47,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:47,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 06:42:47,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:47,041 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 [2025-03-17 06:42:47,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:42:47,168 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 15 [2025-03-17 06:42:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:47,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:47,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642642886] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:42:47,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:42:47,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2025-03-17 06:42:47,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003006376] [2025-03-17 06:42:47,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:42:47,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 06:42:47,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:47,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 06:42:47,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2025-03-17 06:42:47,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:47,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 1431 transitions, 25505 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) [2025-03-17 06:42:47,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:47,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:47,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:53,605 INFO L124 PetriNetUnfolderBase]: 12716/18444 cut-off events. [2025-03-17 06:42:53,606 INFO L125 PetriNetUnfolderBase]: For 233541/233541 co-relation queries the response was YES. [2025-03-17 06:42:53,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138894 conditions, 18444 events. 12716/18444 cut-off events. For 233541/233541 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 109576 event pairs, 635 based on Foata normal form. 6/18450 useless extension candidates. Maximal degree in co-relation 138209. Up to 10099 conditions per place. [2025-03-17 06:42:53,851 INFO L140 encePairwiseOnDemand]: 13/31 looper letters, 1114 selfloop transitions, 1226 changer transitions 2/2343 dead transitions. [2025-03-17 06:42:53,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2343 transitions, 42840 flow [2025-03-17 06:42:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2025-03-17 06:42:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2025-03-17 06:42:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 886 transitions. [2025-03-17 06:42:53,854 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3617803184973459 [2025-03-17 06:42:53,854 INFO L175 Difference]: Start difference. First operand has 311 places, 1431 transitions, 25505 flow. Second operand 79 states and 886 transitions. [2025-03-17 06:42:53,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2343 transitions, 42840 flow [2025-03-17 06:42:57,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 2343 transitions, 40466 flow, removed 771 selfloop flow, removed 15 redundant places. [2025-03-17 06:42:57,553 INFO L231 Difference]: Finished difference. Result has 405 places, 1927 transitions, 35706 flow [2025-03-17 06:42:57,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=23862, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=35706, PETRI_PLACES=405, PETRI_TRANSITIONS=1927} [2025-03-17 06:42:57,555 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 372 predicate places. [2025-03-17 06:42:57,555 INFO L471 AbstractCegarLoop]: Abstraction has has 405 places, 1927 transitions, 35706 flow [2025-03-17 06:42:57,555 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) [2025-03-17 06:42:57,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:57,555 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] [2025-03-17 06:42:57,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 06:42:57,755 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 [2025-03-17 06:42:57,756 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)] === [2025-03-17 06:42:57,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:57,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1774745450, now seen corresponding path program 5 times [2025-03-17 06:42:57,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:57,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432369253] [2025-03-17 06:42:57,756 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:42:57,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:57,761 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:42:57,775 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:57,775 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:42:57,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:58,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:58,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432369253] [2025-03-17 06:42:58,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432369253] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:58,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850443205] [2025-03-17 06:42:58,287 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:42:58,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:58,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:58,289 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) [2025-03-17 06:42:58,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 06:42:58,333 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:42:58,345 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:42:58,346 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:42:58,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:58,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-17 06:42:58,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:58,368 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 [2025-03-17 06:42:58,492 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 [2025-03-17 06:42:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:58,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:58,740 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 [2025-03-17 06:42:58,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:42:58,754 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 [2025-03-17 06:42:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:58,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850443205] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:42:58,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:42:58,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2025-03-17 06:42:58,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159614737] [2025-03-17 06:42:58,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:42:58,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 06:42:58,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:58,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 06:42:58,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2025-03-17 06:42:58,821 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:42:58,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1927 transitions, 35706 flow. Second operand has 26 states, 26 states have (on average 6.230769230769231) internal successors, (162), 26 states have internal predecessors, (162), 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) [2025-03-17 06:42:58,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:58,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:42:58,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:09,807 INFO L124 PetriNetUnfolderBase]: 21014/30596 cut-off events. [2025-03-17 06:43:09,807 INFO L125 PetriNetUnfolderBase]: For 425354/425354 co-relation queries the response was YES. [2025-03-17 06:43:10,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243867 conditions, 30596 events. 21014/30596 cut-off events. For 425354/425354 co-relation queries the response was YES. Maximal size of possible extension queue 1452. Compared 197933 event pairs, 957 based on Foata normal form. 7/30603 useless extension candidates. Maximal degree in co-relation 242727. Up to 16854 conditions per place. [2025-03-17 06:43:10,290 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 2131 selfloop transitions, 1876 changer transitions 4/4012 dead transitions. [2025-03-17 06:43:10,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 4012 transitions, 78213 flow [2025-03-17 06:43:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-17 06:43:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-17 06:43:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 627 transitions. [2025-03-17 06:43:10,292 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.412771560236998 [2025-03-17 06:43:10,292 INFO L175 Difference]: Start difference. First operand has 405 places, 1927 transitions, 35706 flow. Second operand 49 states and 627 transitions. [2025-03-17 06:43:10,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 4012 transitions, 78213 flow [2025-03-17 06:43:21,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 4012 transitions, 75993 flow, removed 788 selfloop flow, removed 14 redundant places. [2025-03-17 06:43:21,323 INFO L231 Difference]: Finished difference. Result has 473 places, 3199 transitions, 62456 flow [2025-03-17 06:43:21,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=34587, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=808, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=62456, PETRI_PLACES=473, PETRI_TRANSITIONS=3199} [2025-03-17 06:43:21,325 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 440 predicate places. [2025-03-17 06:43:21,325 INFO L471 AbstractCegarLoop]: Abstraction has has 473 places, 3199 transitions, 62456 flow [2025-03-17 06:43:21,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.230769230769231) internal successors, (162), 26 states have internal predecessors, (162), 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) [2025-03-17 06:43:21,325 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:21,326 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] [2025-03-17 06:43:21,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 06:43:21,526 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 [2025-03-17 06:43:21,526 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)] === [2025-03-17 06:43:21,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1400828204, now seen corresponding path program 6 times [2025-03-17 06:43:21,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:21,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501910275] [2025-03-17 06:43:21,527 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:43:21,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:21,533 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 24 statements into 3 equivalence classes. [2025-03-17 06:43:21,539 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:43:21,539 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:43:21,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:21,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501910275] [2025-03-17 06:43:21,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501910275] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:43:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221403480] [2025-03-17 06:43:21,762 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:43:21,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:43:21,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:43:21,764 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) [2025-03-17 06:43:21,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 06:43:21,817 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 24 statements into 3 equivalence classes. [2025-03-17 06:43:21,834 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:43:21,834 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:43:21,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:21,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 06:43:21,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:43:21,854 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 [2025-03-17 06:43:21,959 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 [2025-03-17 06:43:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:21,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:43:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:22,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221403480] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:43:22,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:43:22,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 21 [2025-03-17 06:43:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259358607] [2025-03-17 06:43:22,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:43:22,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 06:43:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:22,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 06:43:22,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-03-17 06:43:22,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-17 06:43:22,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 3199 transitions, 62456 flow. Second operand has 22 states, 22 states have (on average 6.090909090909091) internal successors, (134), 22 states have internal predecessors, (134), 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) [2025-03-17 06:43:22,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:22,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-17 06:43:22,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:36,020 INFO L124 PetriNetUnfolderBase]: 21106/30759 cut-off events. [2025-03-17 06:43:36,021 INFO L125 PetriNetUnfolderBase]: For 510112/510112 co-relation queries the response was YES. [2025-03-17 06:43:37,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268178 conditions, 30759 events. 21106/30759 cut-off events. For 510112/510112 co-relation queries the response was YES. Maximal size of possible extension queue 1435. Compared 199450 event pairs, 2019 based on Foata normal form. 1/30760 useless extension candidates. Maximal degree in co-relation 266905. Up to 25052 conditions per place. [2025-03-17 06:43:37,323 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 2377 selfloop transitions, 921 changer transitions 1/3300 dead transitions. [2025-03-17 06:43:37,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 3300 transitions, 70501 flow [2025-03-17 06:43:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 06:43:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 06:43:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2025-03-17 06:43:37,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2025-03-17 06:43:37,324 INFO L175 Difference]: Start difference. First operand has 473 places, 3199 transitions, 62456 flow. Second operand 14 states and 160 transitions. [2025-03-17 06:43:37,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 3300 transitions, 70501 flow