./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 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-commit-1.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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 01:05:22,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 01:05:22,606 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 01:05:22,609 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 01:05:22,610 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 01:05:22,627 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 01:05:22,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 01:05:22,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 01:05:22,628 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 01:05:22,628 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 01:05:22,628 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 01:05:22,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 01:05:22,628 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 01:05:22,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 01:05:22,628 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 01:05:22,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 01:05:22,629 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 01:05:22,629 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 01:05:22,630 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 01:05:22,630 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:05:22,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 01:05:22,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 01:05:22,631 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 -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2025-03-14 01:05:22,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 01:05:22,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 01:05:22,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 01:05:22,866 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 01:05:22,866 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 01:05:22,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2025-03-14 01:05:24,050 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb289036c/800a727743da43b0b01430339c16d7b5/FLAGd7c23c39f [2025-03-14 01:05:24,253 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 01:05:24,253 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2025-03-14 01:05:24,284 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb289036c/800a727743da43b0b01430339c16d7b5/FLAGd7c23c39f [2025-03-14 01:05:24,620 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb289036c/800a727743da43b0b01430339c16d7b5 [2025-03-14 01:05:24,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 01:05:24,623 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 01:05:24,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 01:05:24,626 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 01:05:24,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 01:05:24,629 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,630 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e686044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24, skipping insertion in model container [2025-03-14 01:05:24,630 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,647 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 01:05:24,789 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-commit-1.wvr.c[4643,4656] [2025-03-14 01:05:24,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:05:24,809 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 01:05:24,836 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-commit-1.wvr.c[4643,4656] [2025-03-14 01:05:24,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:05:24,853 INFO L204 MainTranslator]: Completed translation [2025-03-14 01:05:24,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24 WrapperNode [2025-03-14 01:05:24,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 01:05:24,856 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 01:05:24,856 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 01:05:24,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 01:05:24,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,898 INFO L138 Inliner]: procedures = 24, calls = 53, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 325 [2025-03-14 01:05:24,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 01:05:24,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 01:05:24,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 01:05:24,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 01:05:24,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,907 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,924 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-14 01:05:24,925 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,925 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,930 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 01:05:24,935 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 01:05:24,936 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 01:05:24,936 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 01:05:24,936 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (1/1) ... [2025-03-14 01:05:24,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:05:24,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:05:24,961 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) [2025-03-14 01:05:24,965 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 [2025-03-14 01:05:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 01:05:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-14 01:05:24,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-14 01:05:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-14 01:05:24,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-14 01:05:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-14 01:05:24,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-14 01:05:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 01:05:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-14 01:05:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-14 01:05:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-14 01:05:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-14 01:05:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-14 01:05:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-14 01:05:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 01:05:24,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 01:05:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-14 01:05:24,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-14 01:05:24,982 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 01:05:25,080 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 01:05:25,082 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 01:05:25,482 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 01:05:25,483 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 01:05:25,483 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 01:05:25,820 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 01:05:25,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:05:25 BoogieIcfgContainer [2025-03-14 01:05:25,820 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 01:05:25,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 01:05:25,823 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 01:05:25,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 01:05:25,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 01:05:24" (1/3) ... [2025-03-14 01:05:25,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51de872d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:05:25, skipping insertion in model container [2025-03-14 01:05:25,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:05:24" (2/3) ... [2025-03-14 01:05:25,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51de872d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:05:25, skipping insertion in model container [2025-03-14 01:05:25,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:05:25" (3/3) ... [2025-03-14 01:05:25,828 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2025-03-14 01:05:25,840 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 01:05:25,842 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-commit-1.wvr.c that has 4 procedures, 40 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-14 01:05:25,842 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 01:05:25,895 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-14 01:05:25,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 117 flow [2025-03-14 01:05:25,954 INFO L124 PetriNetUnfolderBase]: 9/45 cut-off events. [2025-03-14 01:05:25,957 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:05:25,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 9/45 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2025-03-14 01:05:25,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 117 flow [2025-03-14 01:05:25,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 106 flow [2025-03-14 01:05:25,972 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 01:05:25,982 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;@62478e39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 01:05:25,982 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-14 01:05:25,998 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 01:05:25,998 INFO L124 PetriNetUnfolderBase]: 9/43 cut-off events. [2025-03-14 01:05:25,998 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:05:25,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:25,999 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] [2025-03-14 01:05:25,999 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)] === [2025-03-14 01:05:26,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash -569557458, now seen corresponding path program 1 times [2025-03-14 01:05:26,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:26,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930264828] [2025-03-14 01:05:26,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:26,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:26,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-14 01:05:26,089 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:05:26,090 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:26,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:05:26,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:26,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930264828] [2025-03-14 01:05:26,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930264828] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:26,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:26,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:05:26,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134781089] [2025-03-14 01:05:26,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:26,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-14 01:05:26,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:26,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-14 01:05:26,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-14 01:05:26,176 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:26,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2025-03-14 01:05:26,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:26,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:26,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:26,612 INFO L124 PetriNetUnfolderBase]: 2548/3637 cut-off events. [2025-03-14 01:05:26,612 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2025-03-14 01:05:26,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7470 conditions, 3637 events. 2548/3637 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16654 event pairs, 2146 based on Foata normal form. 0/3229 useless extension candidates. Maximal degree in co-relation 7063. Up to 3626 conditions per place. [2025-03-14 01:05:26,637 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 37 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2025-03-14 01:05:26,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 174 flow [2025-03-14 01:05:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-14 01:05:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-14 01:05:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2025-03-14 01:05:26,647 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-03-14 01:05:26,648 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 106 flow. Second operand 2 states and 54 transitions. [2025-03-14 01:05:26,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 174 flow [2025-03-14 01:05:26,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 162 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-14 01:05:26,655 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 88 flow [2025-03-14 01:05:26,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=88, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2025-03-14 01:05:26,661 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2025-03-14 01:05:26,662 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 88 flow [2025-03-14 01:05:26,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2025-03-14 01:05:26,662 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:26,662 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, 1, 1, 1] [2025-03-14 01:05:26,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 01:05:26,663 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)] === [2025-03-14 01:05:26,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1361167108, now seen corresponding path program 1 times [2025-03-14 01:05:26,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:26,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038497462] [2025-03-14 01:05:26,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:26,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:26,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-14 01:05:26,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-14 01:05:26,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:26,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:05:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038497462] [2025-03-14 01:05:26,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038497462] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:26,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:26,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:05:26,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89876157] [2025-03-14 01:05:26,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:26,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:05:26,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:26,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:05:26,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:05:26,878 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:26,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2025-03-14 01:05:26,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:26,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:26,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:27,315 INFO L124 PetriNetUnfolderBase]: 3499/4990 cut-off events. [2025-03-14 01:05:27,315 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-03-14 01:05:27,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10072 conditions, 4990 events. 3499/4990 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24953 event pairs, 876 based on Foata normal form. 1/4374 useless extension candidates. Maximal degree in co-relation 10069. Up to 3852 conditions per place. [2025-03-14 01:05:27,342 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 56 selfloop transitions, 4 changer transitions 1/65 dead transitions. [2025-03-14 01:05:27,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 263 flow [2025-03-14 01:05:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:05:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:05:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2025-03-14 01:05:27,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2025-03-14 01:05:27,344 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 88 flow. Second operand 3 states and 83 transitions. [2025-03-14 01:05:27,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 263 flow [2025-03-14 01:05:27,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-14 01:05:27,347 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 114 flow [2025-03-14 01:05:27,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2025-03-14 01:05:27,348 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2025-03-14 01:05:27,348 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 114 flow [2025-03-14 01:05:27,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2025-03-14 01:05:27,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:27,348 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:27,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-14 01:05:27,348 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)] === [2025-03-14 01:05:27,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2012511443, now seen corresponding path program 1 times [2025-03-14 01:05:27,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:27,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27452985] [2025-03-14 01:05:27,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:27,360 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-14 01:05:27,370 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-14 01:05:27,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:27,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:05:27,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:27,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27452985] [2025-03-14 01:05:27,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27452985] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:27,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:27,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 01:05:27,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659555435] [2025-03-14 01:05:27,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:27,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:05:27,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:27,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:05:27,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:05:27,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:27,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2025-03-14 01:05:27,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:27,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:27,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:27,861 INFO L124 PetriNetUnfolderBase]: 4090/5894 cut-off events. [2025-03-14 01:05:27,862 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2025-03-14 01:05:27,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12635 conditions, 5894 events. 4090/5894 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 29483 event pairs, 1812 based on Foata normal form. 158/5255 useless extension candidates. Maximal degree in co-relation 12630. Up to 3358 conditions per place. [2025-03-14 01:05:27,884 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 62 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2025-03-14 01:05:27,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 298 flow [2025-03-14 01:05:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:05:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:05:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2025-03-14 01:05:27,885 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-14 01:05:27,885 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 114 flow. Second operand 3 states and 84 transitions. [2025-03-14 01:05:27,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 298 flow [2025-03-14 01:05:27,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 68 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:05:27,887 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 118 flow [2025-03-14 01:05:27,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2025-03-14 01:05:27,887 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2025-03-14 01:05:27,887 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 118 flow [2025-03-14 01:05:27,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2025-03-14 01:05:27,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:27,887 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:27,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-14 01:05:27,888 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)] === [2025-03-14 01:05:27,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash -700640505, now seen corresponding path program 1 times [2025-03-14 01:05:27,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:27,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633158952] [2025-03-14 01:05:27,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:27,897 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-14 01:05:27,911 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-14 01:05:27,914 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:27,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:05:27,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:27,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633158952] [2025-03-14 01:05:27,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633158952] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:27,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:27,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 01:05:27,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336321993] [2025-03-14 01:05:27,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:27,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:05:27,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:27,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:05:27,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:05:27,977 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:27,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2025-03-14 01:05:27,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:27,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:27,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:28,326 INFO L124 PetriNetUnfolderBase]: 3703/5358 cut-off events. [2025-03-14 01:05:28,328 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2025-03-14 01:05:28,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11720 conditions, 5358 events. 3703/5358 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 25987 event pairs, 1373 based on Foata normal form. 94/4783 useless extension candidates. Maximal degree in co-relation 11714. Up to 3376 conditions per place. [2025-03-14 01:05:28,351 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 57 selfloop transitions, 2 changer transitions 5/68 dead transitions. [2025-03-14 01:05:28,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 301 flow [2025-03-14 01:05:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:05:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:05:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2025-03-14 01:05:28,354 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2025-03-14 01:05:28,354 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 118 flow. Second operand 3 states and 86 transitions. [2025-03-14 01:05:28,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 301 flow [2025-03-14 01:05:28,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:05:28,356 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 124 flow [2025-03-14 01:05:28,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2025-03-14 01:05:28,357 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2025-03-14 01:05:28,358 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 124 flow [2025-03-14 01:05:28,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2025-03-14 01:05:28,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:28,358 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:28,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-14 01:05:28,359 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)] === [2025-03-14 01:05:28,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:28,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1078075590, now seen corresponding path program 1 times [2025-03-14 01:05:28,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:28,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477948047] [2025-03-14 01:05:28,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:28,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:28,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-14 01:05:28,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-14 01:05:28,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:28,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:05:28,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:28,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477948047] [2025-03-14 01:05:28,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477948047] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:28,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:28,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:05:28,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506699307] [2025-03-14 01:05:28,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:28,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:05:28,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:28,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:05:28,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:05:28,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:28,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:05:28,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:28,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:28,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:28,687 INFO L124 PetriNetUnfolderBase]: 2561/3734 cut-off events. [2025-03-14 01:05:28,687 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2025-03-14 01:05:28,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8250 conditions, 3734 events. 2561/3734 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16265 event pairs, 1346 based on Foata normal form. 62/3266 useless extension candidates. Maximal degree in co-relation 8243. Up to 2767 conditions per place. [2025-03-14 01:05:28,698 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 48 selfloop transitions, 2 changer transitions 7/61 dead transitions. [2025-03-14 01:05:28,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 275 flow [2025-03-14 01:05:28,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:05:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:05:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2025-03-14 01:05:28,699 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2025-03-14 01:05:28,699 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 124 flow. Second operand 3 states and 76 transitions. [2025-03-14 01:05:28,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 275 flow [2025-03-14 01:05:28,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:05:28,701 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 134 flow [2025-03-14 01:05:28,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2025-03-14 01:05:28,702 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2025-03-14 01:05:28,702 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 134 flow [2025-03-14 01:05:28,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:05:28,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:28,702 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:28,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-14 01:05:28,702 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)] === [2025-03-14 01:05:28,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:28,703 INFO L85 PathProgramCache]: Analyzing trace with hash -914143491, now seen corresponding path program 1 times [2025-03-14 01:05:28,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:28,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855409705] [2025-03-14 01:05:28,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:28,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:28,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-14 01:05:28,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-14 01:05:28,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:28,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:05:28,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:28,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855409705] [2025-03-14 01:05:28,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855409705] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:28,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:28,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 01:05:28,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89210453] [2025-03-14 01:05:28,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:28,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:05:28,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:28,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:05:28,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:05:28,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:28,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2025-03-14 01:05:28,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:28,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:28,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:29,159 INFO L124 PetriNetUnfolderBase]: 3173/4706 cut-off events. [2025-03-14 01:05:29,160 INFO L125 PetriNetUnfolderBase]: For 773/773 co-relation queries the response was YES. [2025-03-14 01:05:29,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10442 conditions, 4706 events. 3173/4706 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 22227 event pairs, 2856 based on Foata normal form. 56/4044 useless extension candidates. Maximal degree in co-relation 10434. Up to 3723 conditions per place. [2025-03-14 01:05:29,173 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 40 selfloop transitions, 2 changer transitions 30/76 dead transitions. [2025-03-14 01:05:29,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 346 flow [2025-03-14 01:05:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:05:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:05:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2025-03-14 01:05:29,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-03-14 01:05:29,175 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 134 flow. Second operand 5 states and 104 transitions. [2025-03-14 01:05:29,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 346 flow [2025-03-14 01:05:29,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:05:29,178 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 154 flow [2025-03-14 01:05:29,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2025-03-14 01:05:29,179 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2025-03-14 01:05:29,180 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 154 flow [2025-03-14 01:05:29,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2025-03-14 01:05:29,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:29,180 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:29,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-14 01:05:29,180 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)] === [2025-03-14 01:05:29,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash -56169424, now seen corresponding path program 1 times [2025-03-14 01:05:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:29,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939228855] [2025-03-14 01:05:29,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:29,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-14 01:05:29,208 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-14 01:05:29,208 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:29,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:05:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939228855] [2025-03-14 01:05:29,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939228855] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:29,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:29,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:05:29,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667484888] [2025-03-14 01:05:29,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:29,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:05:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:29,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:05:29,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:05:29,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:29,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2025-03-14 01:05:29,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:29,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:29,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:29,739 INFO L124 PetriNetUnfolderBase]: 3336/4961 cut-off events. [2025-03-14 01:05:29,739 INFO L125 PetriNetUnfolderBase]: For 908/908 co-relation queries the response was YES. [2025-03-14 01:05:29,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11118 conditions, 4961 events. 3336/4961 cut-off events. For 908/908 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23541 event pairs, 3018 based on Foata normal form. 14/4235 useless extension candidates. Maximal degree in co-relation 11107. Up to 3721 conditions per place. [2025-03-14 01:05:29,757 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 40 selfloop transitions, 3 changer transitions 30/77 dead transitions. [2025-03-14 01:05:29,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 77 transitions, 390 flow [2025-03-14 01:05:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:05:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:05:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2025-03-14 01:05:29,758 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2025-03-14 01:05:29,758 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 154 flow. Second operand 4 states and 97 transitions. [2025-03-14 01:05:29,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 77 transitions, 390 flow [2025-03-14 01:05:29,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 77 transitions, 366 flow, removed 11 selfloop flow, removed 3 redundant places. [2025-03-14 01:05:29,765 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 158 flow [2025-03-14 01:05:29,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2025-03-14 01:05:29,767 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2025-03-14 01:05:29,767 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 158 flow [2025-03-14 01:05:29,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2025-03-14 01:05:29,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:29,768 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:29,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-14 01:05:29,768 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)] === [2025-03-14 01:05:29,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2075639658, now seen corresponding path program 1 times [2025-03-14 01:05:29,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:29,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487363406] [2025-03-14 01:05:29,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:29,781 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-14 01:05:29,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:05:29,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:29,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-14 01:05:29,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:29,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487363406] [2025-03-14 01:05:29,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487363406] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:29,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:29,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:05:29,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672154802] [2025-03-14 01:05:29,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:29,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:05:29,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:29,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:05:29,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:05:29,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:29,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2025-03-14 01:05:29,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:29,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:29,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:30,233 INFO L124 PetriNetUnfolderBase]: 3297/4894 cut-off events. [2025-03-14 01:05:30,233 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2025-03-14 01:05:30,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10865 conditions, 4894 events. 3297/4894 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 23400 event pairs, 2984 based on Foata normal form. 10/4168 useless extension candidates. Maximal degree in co-relation 10854. Up to 3719 conditions per place. [2025-03-14 01:05:30,250 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 38 selfloop transitions, 6 changer transitions 24/72 dead transitions. [2025-03-14 01:05:30,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 356 flow [2025-03-14 01:05:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:05:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:05:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2025-03-14 01:05:30,251 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-14 01:05:30,251 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 158 flow. Second operand 5 states and 100 transitions. [2025-03-14 01:05:30,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 356 flow [2025-03-14 01:05:30,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 346 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-14 01:05:30,254 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 174 flow [2025-03-14 01:05:30,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2025-03-14 01:05:30,254 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2025-03-14 01:05:30,255 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 174 flow [2025-03-14 01:05:30,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2025-03-14 01:05:30,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:30,255 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:30,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-14 01:05:30,255 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)] === [2025-03-14 01:05:30,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1139471787, now seen corresponding path program 1 times [2025-03-14 01:05:30,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:30,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553237934] [2025-03-14 01:05:30,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:30,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:30,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-14 01:05:30,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-14 01:05:30,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:30,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-14 01:05:30,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:30,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553237934] [2025-03-14 01:05:30,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553237934] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:30,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:30,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 01:05:30,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890235269] [2025-03-14 01:05:30,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:30,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:05:30,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:30,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:05:30,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:05:30,357 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:30,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2025-03-14 01:05:30,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:30,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:30,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:30,794 INFO L124 PetriNetUnfolderBase]: 5255/7615 cut-off events. [2025-03-14 01:05:30,794 INFO L125 PetriNetUnfolderBase]: For 2329/2329 co-relation queries the response was YES. [2025-03-14 01:05:30,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17554 conditions, 7615 events. 5255/7615 cut-off events. For 2329/2329 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 35164 event pairs, 2749 based on Foata normal form. 156/6710 useless extension candidates. Maximal degree in co-relation 17542. Up to 2981 conditions per place. [2025-03-14 01:05:30,819 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 85 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2025-03-14 01:05:30,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 98 transitions, 506 flow [2025-03-14 01:05:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:05:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:05:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2025-03-14 01:05:30,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2025-03-14 01:05:30,821 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 174 flow. Second operand 4 states and 115 transitions. [2025-03-14 01:05:30,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 98 transitions, 506 flow [2025-03-14 01:05:30,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 98 transitions, 492 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-14 01:05:30,823 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 223 flow [2025-03-14 01:05:30,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2025-03-14 01:05:30,826 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2025-03-14 01:05:30,827 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 223 flow [2025-03-14 01:05:30,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2025-03-14 01:05:30,827 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:30,827 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:30,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-14 01:05:30,827 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)] === [2025-03-14 01:05:30,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1792165292, now seen corresponding path program 1 times [2025-03-14 01:05:30,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:30,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577193498] [2025-03-14 01:05:30,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:30,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:30,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-14 01:05:30,858 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-14 01:05:30,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:30,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-14 01:05:30,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:30,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577193498] [2025-03-14 01:05:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577193498] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:05:30,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357723586] [2025-03-14 01:05:30,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:05:30,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:05:30,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:05:30,996 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) [2025-03-14 01:05:30,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 01:05:31,068 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-14 01:05:31,101 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-14 01:05:31,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:31,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:31,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:05:31,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:05:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-14 01:05:31,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:05:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-14 01:05:31,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357723586] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:05:31,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:05:31,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-14 01:05:31,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219962208] [2025-03-14 01:05:31,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:05:31,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-14 01:05:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:31,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-14 01:05:31,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-14 01:05:31,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:31,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 12 states have internal predecessors, (140), 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) [2025-03-14 01:05:31,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:31,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:31,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:31,831 INFO L124 PetriNetUnfolderBase]: 6007/8805 cut-off events. [2025-03-14 01:05:31,831 INFO L125 PetriNetUnfolderBase]: For 4180/4180 co-relation queries the response was YES. [2025-03-14 01:05:31,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21970 conditions, 8805 events. 6007/8805 cut-off events. For 4180/4180 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 42807 event pairs, 5125 based on Foata normal form. 2/7537 useless extension candidates. Maximal degree in co-relation 21957. Up to 7601 conditions per place. [2025-03-14 01:05:31,864 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 48 selfloop transitions, 3 changer transitions 43/98 dead transitions. [2025-03-14 01:05:31,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 546 flow [2025-03-14 01:05:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:05:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:05:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2025-03-14 01:05:31,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2025-03-14 01:05:31,865 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 223 flow. Second operand 7 states and 130 transitions. [2025-03-14 01:05:31,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 546 flow [2025-03-14 01:05:31,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 538 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-03-14 01:05:31,870 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 239 flow [2025-03-14 01:05:31,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2025-03-14 01:05:31,871 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2025-03-14 01:05:31,871 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 239 flow [2025-03-14 01:05:31,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 12 states have internal predecessors, (140), 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) [2025-03-14 01:05:31,871 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:31,871 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:31,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-14 01:05:32,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-14 01:05:32,072 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)] === [2025-03-14 01:05:32,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash 95118911, now seen corresponding path program 2 times [2025-03-14 01:05:32,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:32,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581942479] [2025-03-14 01:05:32,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:05:32,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:32,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-03-14 01:05:32,179 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 41 of 45 statements. [2025-03-14 01:05:32,180 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-14 01:05:32,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-14 01:05:33,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:33,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581942479] [2025-03-14 01:05:33,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581942479] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:33,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:33,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-14 01:05:33,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389644359] [2025-03-14 01:05:33,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:33,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-14 01:05:33,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:33,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-14 01:05:33,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:05:33,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:33,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 239 flow. Second operand has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 13 states have internal predecessors, (131), 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) [2025-03-14 01:05:33,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:33,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:33,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:33,865 INFO L124 PetriNetUnfolderBase]: 6147/8901 cut-off events. [2025-03-14 01:05:33,865 INFO L125 PetriNetUnfolderBase]: For 4584/4584 co-relation queries the response was YES. [2025-03-14 01:05:33,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22448 conditions, 8901 events. 6147/8901 cut-off events. For 4584/4584 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 41489 event pairs, 2206 based on Foata normal form. 1/7639 useless extension candidates. Maximal degree in co-relation 22430. Up to 6518 conditions per place. [2025-03-14 01:05:33,903 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 100 selfloop transitions, 15 changer transitions 18/137 dead transitions. [2025-03-14 01:05:33,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 731 flow [2025-03-14 01:05:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-14 01:05:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-14 01:05:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2025-03-14 01:05:33,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40208333333333335 [2025-03-14 01:05:33,905 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 239 flow. Second operand 10 states and 193 transitions. [2025-03-14 01:05:33,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 731 flow [2025-03-14 01:05:33,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 137 transitions, 715 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-03-14 01:05:33,912 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 347 flow [2025-03-14 01:05:33,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2025-03-14 01:05:33,913 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2025-03-14 01:05:33,913 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 347 flow [2025-03-14 01:05:33,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 13 states have internal predecessors, (131), 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) [2025-03-14 01:05:33,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:33,913 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:33,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-14 01:05:33,913 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)] === [2025-03-14 01:05:33,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash 526799844, now seen corresponding path program 3 times [2025-03-14 01:05:33,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:33,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580407585] [2025-03-14 01:05:33,914 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:05:33,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:33,925 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 2 equivalence classes. [2025-03-14 01:05:33,963 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-14 01:05:33,963 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:05:33,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-14 01:05:34,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:34,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580407585] [2025-03-14 01:05:34,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580407585] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:05:34,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058562414] [2025-03-14 01:05:34,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:05:34,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:05:34,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:05:34,110 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) [2025-03-14 01:05:34,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 01:05:34,180 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 2 equivalence classes. [2025-03-14 01:05:34,219 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-14 01:05:34,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:05:34,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:34,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-14 01:05:34,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:05:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-14 01:05:34,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:05:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-14 01:05:34,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058562414] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:05:34,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:05:34,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2025-03-14 01:05:34,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685788688] [2025-03-14 01:05:34,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:05:34,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-14 01:05:34,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:34,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-14 01:05:34,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2025-03-14 01:05:34,758 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:34,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 347 flow. Second operand has 20 states, 20 states have (on average 13.0) internal successors, (260), 20 states have internal predecessors, (260), 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) [2025-03-14 01:05:34,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:34,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:34,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:36,164 INFO L124 PetriNetUnfolderBase]: 11303/17026 cut-off events. [2025-03-14 01:05:36,164 INFO L125 PetriNetUnfolderBase]: For 15669/15669 co-relation queries the response was YES. [2025-03-14 01:05:36,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43556 conditions, 17026 events. 11303/17026 cut-off events. For 15669/15669 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 96009 event pairs, 7950 based on Foata normal form. 901/15389 useless extension candidates. Maximal degree in co-relation 43537. Up to 8883 conditions per place. [2025-03-14 01:05:36,237 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 112 selfloop transitions, 13 changer transitions 165/294 dead transitions. [2025-03-14 01:05:36,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 294 transitions, 1853 flow [2025-03-14 01:05:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-14 01:05:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-14 01:05:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 378 transitions. [2025-03-14 01:05:36,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39375 [2025-03-14 01:05:36,239 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 347 flow. Second operand 20 states and 378 transitions. [2025-03-14 01:05:36,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 294 transitions, 1853 flow [2025-03-14 01:05:36,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 294 transitions, 1757 flow, removed 43 selfloop flow, removed 2 redundant places. [2025-03-14 01:05:36,253 INFO L231 Difference]: Finished difference. Result has 106 places, 74 transitions, 472 flow [2025-03-14 01:05:36,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=472, PETRI_PLACES=106, PETRI_TRANSITIONS=74} [2025-03-14 01:05:36,254 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2025-03-14 01:05:36,254 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 74 transitions, 472 flow [2025-03-14 01:05:36,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.0) internal successors, (260), 20 states have internal predecessors, (260), 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) [2025-03-14 01:05:36,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:36,255 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:36,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-14 01:05:36,459 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,SelfDestructingSolverStorable11 [2025-03-14 01:05:36,459 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)] === [2025-03-14 01:05:36,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:36,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1368710796, now seen corresponding path program 4 times [2025-03-14 01:05:36,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:36,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498513114] [2025-03-14 01:05:36,460 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:05:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:36,471 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-14 01:05:36,484 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-14 01:05:36,484 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:05:36,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-14 01:05:36,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:36,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498513114] [2025-03-14 01:05:36,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498513114] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:05:36,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711022649] [2025-03-14 01:05:36,635 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:05:36,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:05:36,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:05:36,638 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) [2025-03-14 01:05:36,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 01:05:36,783 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-14 01:05:36,816 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-14 01:05:36,816 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:05:36,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:36,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-14 01:05:36,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:05:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-14 01:05:36,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:05:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-14 01:05:37,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711022649] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:05:37,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:05:37,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-14 01:05:37,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967066325] [2025-03-14 01:05:37,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:05:37,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-14 01:05:37,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:37,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-14 01:05:37,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-03-14 01:05:37,031 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:37,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 74 transitions, 472 flow. Second operand has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 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) [2025-03-14 01:05:37,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:37,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:37,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:37,877 INFO L124 PetriNetUnfolderBase]: 6905/10111 cut-off events. [2025-03-14 01:05:37,877 INFO L125 PetriNetUnfolderBase]: For 15214/15214 co-relation queries the response was YES. [2025-03-14 01:05:37,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28756 conditions, 10111 events. 6905/10111 cut-off events. For 15214/15214 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 50003 event pairs, 5712 based on Foata normal form. 2/8638 useless extension candidates. Maximal degree in co-relation 28722. Up to 8887 conditions per place. [2025-03-14 01:05:37,917 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 60 selfloop transitions, 4 changer transitions 51/119 dead transitions. [2025-03-14 01:05:37,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 119 transitions, 828 flow [2025-03-14 01:05:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-14 01:05:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-14 01:05:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2025-03-14 01:05:37,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2025-03-14 01:05:37,918 INFO L175 Difference]: Start difference. First operand has 106 places, 74 transitions, 472 flow. Second operand 9 states and 152 transitions. [2025-03-14 01:05:37,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 119 transitions, 828 flow [2025-03-14 01:05:37,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 772 flow, removed 23 selfloop flow, removed 9 redundant places. [2025-03-14 01:05:37,939 INFO L231 Difference]: Finished difference. Result has 101 places, 68 transitions, 377 flow [2025-03-14 01:05:37,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=377, PETRI_PLACES=101, PETRI_TRANSITIONS=68} [2025-03-14 01:05:37,939 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2025-03-14 01:05:37,939 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 68 transitions, 377 flow [2025-03-14 01:05:37,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 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) [2025-03-14 01:05:37,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:37,940 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:37,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-14 01:05:38,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:05:38,140 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)] === [2025-03-14 01:05:38,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:38,141 INFO L85 PathProgramCache]: Analyzing trace with hash 536495547, now seen corresponding path program 5 times [2025-03-14 01:05:38,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:38,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114387105] [2025-03-14 01:05:38,141 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:05:38,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:38,155 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 3 equivalence classes. [2025-03-14 01:05:38,167 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 51 of 51 statements. [2025-03-14 01:05:38,168 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-14 01:05:38,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-14 01:05:38,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:38,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114387105] [2025-03-14 01:05:38,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114387105] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:05:38,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215757301] [2025-03-14 01:05:38,284 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:05:38,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:05:38,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:05:38,286 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) [2025-03-14 01:05:38,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 01:05:38,355 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 3 equivalence classes. [2025-03-14 01:05:38,395 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 51 of 51 statements. [2025-03-14 01:05:38,395 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-14 01:05:38,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:38,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-14 01:05:38,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:05:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-14 01:05:38,450 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:05:38,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215757301] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:38,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:05:38,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2025-03-14 01:05:38,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137549743] [2025-03-14 01:05:38,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:38,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:05:38,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:38,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:05:38,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:05:38,452 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:38,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 68 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:05:38,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:38,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:38,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:40,107 INFO L124 PetriNetUnfolderBase]: 14442/20824 cut-off events. [2025-03-14 01:05:40,107 INFO L125 PetriNetUnfolderBase]: For 32795/32795 co-relation queries the response was YES. [2025-03-14 01:05:40,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59786 conditions, 20824 events. 14442/20824 cut-off events. For 32795/32795 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 103465 event pairs, 6150 based on Foata normal form. 375/18302 useless extension candidates. Maximal degree in co-relation 59754. Up to 8331 conditions per place. [2025-03-14 01:05:40,317 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 114 selfloop transitions, 6 changer transitions 0/124 dead transitions. [2025-03-14 01:05:40,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 124 transitions, 888 flow [2025-03-14 01:05:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:05:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:05:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2025-03-14 01:05:40,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2025-03-14 01:05:40,318 INFO L175 Difference]: Start difference. First operand has 101 places, 68 transitions, 377 flow. Second operand 4 states and 115 transitions. [2025-03-14 01:05:40,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 124 transitions, 888 flow [2025-03-14 01:05:40,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 818 flow, removed 28 selfloop flow, removed 15 redundant places. [2025-03-14 01:05:40,369 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 352 flow [2025-03-14 01:05:40,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2025-03-14 01:05:40,370 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2025-03-14 01:05:40,370 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 352 flow [2025-03-14 01:05:40,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:05:40,371 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:40,371 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:40,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-14 01:05:40,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:05:40,572 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)] === [2025-03-14 01:05:40,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash 315876789, now seen corresponding path program 6 times [2025-03-14 01:05:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:40,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957969] [2025-03-14 01:05:40,572 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:05:40,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:40,588 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 51 statements into 3 equivalence classes. [2025-03-14 01:05:40,657 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 51 of 51 statements. [2025-03-14 01:05:40,657 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-14 01:05:40,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-14 01:05:40,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:40,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957969] [2025-03-14 01:05:40,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957969] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:05:40,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:05:40,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:05:40,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916887245] [2025-03-14 01:05:40,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:05:40,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:05:40,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:40,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:05:40,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:05:40,748 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:40,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:05:40,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:40,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:40,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:41,041 INFO L124 PetriNetUnfolderBase]: 2344/3634 cut-off events. [2025-03-14 01:05:41,041 INFO L125 PetriNetUnfolderBase]: For 2373/2373 co-relation queries the response was YES. [2025-03-14 01:05:41,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8509 conditions, 3634 events. 2344/3634 cut-off events. For 2373/2373 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 15635 event pairs, 2101 based on Foata normal form. 154/3150 useless extension candidates. Maximal degree in co-relation 8485. Up to 3372 conditions per place. [2025-03-14 01:05:41,056 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 58 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2025-03-14 01:05:41,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 67 transitions, 438 flow [2025-03-14 01:05:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:05:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:05:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2025-03-14 01:05:41,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4010416666666667 [2025-03-14 01:05:41,057 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 352 flow. Second operand 4 states and 77 transitions. [2025-03-14 01:05:41,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 67 transitions, 438 flow [2025-03-14 01:05:41,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 385 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-03-14 01:05:41,061 INFO L231 Difference]: Finished difference. Result has 77 places, 56 transitions, 245 flow [2025-03-14 01:05:41,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2025-03-14 01:05:41,062 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2025-03-14 01:05:41,062 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 245 flow [2025-03-14 01:05:41,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:05:41,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:41,062 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:41,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-14 01:05:41,062 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)] === [2025-03-14 01:05:41,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2010141952, now seen corresponding path program 7 times [2025-03-14 01:05:41,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:41,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718452019] [2025-03-14 01:05:41,063 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:05:41,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:41,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-14 01:05:41,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-14 01:05:41,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:41,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-14 01:05:41,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:41,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718452019] [2025-03-14 01:05:41,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718452019] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:05:41,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931179798] [2025-03-14 01:05:41,296 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:05:41,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:05:41,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:05:41,298 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) [2025-03-14 01:05:41,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 01:05:41,379 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-14 01:05:41,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-14 01:05:41,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:05:41,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:41,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:05:41,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:05:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-14 01:05:41,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:05:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-14 01:05:41,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931179798] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:05:41,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:05:41,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2025-03-14 01:05:41,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444019228] [2025-03-14 01:05:41,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:05:41,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-14 01:05:41,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:41,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-14 01:05:41,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2025-03-14 01:05:41,621 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:41,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 245 flow. Second operand has 17 states, 17 states have (on average 13.588235294117647) internal successors, (231), 17 states have internal predecessors, (231), 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) [2025-03-14 01:05:41,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:41,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:41,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:42,758 INFO L124 PetriNetUnfolderBase]: 6980/10858 cut-off events. [2025-03-14 01:05:42,758 INFO L125 PetriNetUnfolderBase]: For 2761/2761 co-relation queries the response was YES. [2025-03-14 01:05:42,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24422 conditions, 10858 events. 6980/10858 cut-off events. For 2761/2761 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 60259 event pairs, 5887 based on Foata normal form. 22/8986 useless extension candidates. Maximal degree in co-relation 24403. Up to 3613 conditions per place. [2025-03-14 01:05:42,807 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 46 selfloop transitions, 8 changer transitions 203/261 dead transitions. [2025-03-14 01:05:42,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 261 transitions, 1379 flow [2025-03-14 01:05:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-14 01:05:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-14 01:05:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 415 transitions. [2025-03-14 01:05:42,809 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3602430555555556 [2025-03-14 01:05:42,809 INFO L175 Difference]: Start difference. First operand has 77 places, 56 transitions, 245 flow. Second operand 24 states and 415 transitions. [2025-03-14 01:05:42,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 261 transitions, 1379 flow [2025-03-14 01:05:42,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 261 transitions, 1348 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-03-14 01:05:42,816 INFO L231 Difference]: Finished difference. Result has 111 places, 58 transitions, 297 flow [2025-03-14 01:05:42,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=297, PETRI_PLACES=111, PETRI_TRANSITIONS=58} [2025-03-14 01:05:42,817 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2025-03-14 01:05:42,817 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 58 transitions, 297 flow [2025-03-14 01:05:42,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.588235294117647) internal successors, (231), 17 states have internal predecessors, (231), 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) [2025-03-14 01:05:42,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:42,817 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:42,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-14 01:05:43,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-14 01:05:43,018 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)] === [2025-03-14 01:05:43,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:43,018 INFO L85 PathProgramCache]: Analyzing trace with hash 919387190, now seen corresponding path program 8 times [2025-03-14 01:05:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:43,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789415102] [2025-03-14 01:05:43,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:05:43,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:43,033 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 63 statements into 2 equivalence classes. [2025-03-14 01:05:43,056 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 63 of 63 statements. [2025-03-14 01:05:43,057 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:05:43,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-14 01:05:43,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:43,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789415102] [2025-03-14 01:05:43,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789415102] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:05:43,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911743723] [2025-03-14 01:05:43,227 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:05:43,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:05:43,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:05:43,229 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) [2025-03-14 01:05:43,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-14 01:05:43,309 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 63 statements into 2 equivalence classes. [2025-03-14 01:05:43,458 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 63 of 63 statements. [2025-03-14 01:05:43,459 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:05:43,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:43,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-14 01:05:43,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:05:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-14 01:05:43,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:05:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-14 01:05:43,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911743723] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:05:43,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:05:43,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2025-03-14 01:05:43,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575559656] [2025-03-14 01:05:43,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:05:43,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-14 01:05:43,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:05:43,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-14 01:05:43,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2025-03-14 01:05:43,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-14 01:05:43,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 58 transitions, 297 flow. Second operand has 22 states, 22 states have (on average 13.590909090909092) internal successors, (299), 22 states have internal predecessors, (299), 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) [2025-03-14 01:05:43,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:05:43,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-14 01:05:43,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:05:44,669 INFO L124 PetriNetUnfolderBase]: 3986/6226 cut-off events. [2025-03-14 01:05:44,670 INFO L125 PetriNetUnfolderBase]: For 2023/2023 co-relation queries the response was YES. [2025-03-14 01:05:44,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14184 conditions, 6226 events. 3986/6226 cut-off events. For 2023/2023 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 30277 event pairs, 2412 based on Foata normal form. 56/5201 useless extension candidates. Maximal degree in co-relation 14151. Up to 2403 conditions per place. [2025-03-14 01:05:44,694 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 53 selfloop transitions, 9 changer transitions 88/154 dead transitions. [2025-03-14 01:05:44,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 915 flow [2025-03-14 01:05:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-14 01:05:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-14 01:05:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 242 transitions. [2025-03-14 01:05:44,695 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2025-03-14 01:05:44,695 INFO L175 Difference]: Start difference. First operand has 111 places, 58 transitions, 297 flow. Second operand 14 states and 242 transitions. [2025-03-14 01:05:44,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 915 flow [2025-03-14 01:05:44,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 827 flow, removed 36 selfloop flow, removed 19 redundant places. [2025-03-14 01:05:44,702 INFO L231 Difference]: Finished difference. Result has 94 places, 59 transitions, 281 flow [2025-03-14 01:05:44,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=281, PETRI_PLACES=94, PETRI_TRANSITIONS=59} [2025-03-14 01:05:44,702 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2025-03-14 01:05:44,702 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 59 transitions, 281 flow [2025-03-14 01:05:44,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.590909090909092) internal successors, (299), 22 states have internal predecessors, (299), 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) [2025-03-14 01:05:44,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:05:44,703 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:05:44,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-14 01:05:44,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-14 01:05:44,904 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)] === [2025-03-14 01:05:44,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:05:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2029761124, now seen corresponding path program 9 times [2025-03-14 01:05:44,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:05:44,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512324955] [2025-03-14 01:05:44,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:05:44,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:05:44,917 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 3 equivalence classes. [2025-03-14 01:05:45,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 64 of 64 statements. [2025-03-14 01:05:45,105 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-14 01:05:45,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:05:50,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:05:50,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512324955] [2025-03-14 01:05:50,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512324955] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:05:50,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42913314] [2025-03-14 01:05:50,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:05:50,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:05:50,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:05:50,231 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) [2025-03-14 01:05:50,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-14 01:05:50,317 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 3 equivalence classes. [2025-03-14 01:05:50,549 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 64 of 64 statements. [2025-03-14 01:05:50,549 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-14 01:05:50,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:05:50,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 126 conjuncts are in the unsatisfiable core [2025-03-14 01:05:50,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:05:51,182 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 [2025-03-14 01:05:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:05:53,922 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:18,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:06:18,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1305 treesize of output 1255 [2025-03-14 01:06:18,634 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-14 01:06:18,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:06:18,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 103 [2025-03-14 01:06:18,782 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-14 01:06:18,878 INFO L349 Elim1Store]: treesize reduction 10, result has 94.3 percent of original size [2025-03-14 01:06:18,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 325 treesize of output 451 [2025-03-14 01:06:30,348 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2025-03-14 01:06:30,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 189 treesize of output 159 [2025-03-14 01:06:34,876 INFO L349 Elim1Store]: treesize reduction 70, result has 91.9 percent of original size [2025-03-14 01:06:34,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 3680 treesize of output 3475