./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-nzb-file-symm.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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:37:20,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:37:20,625 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:37:20,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:37:20,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:37:20,647 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:37:20,649 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:37:20,649 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:37:20,649 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:37:20,649 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:37:20,649 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:37:20,649 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:37:20,650 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:37:20,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:37:20,650 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:37:20,651 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:37:20,651 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:37:20,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:37:20,651 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 -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2025-03-17 06:37:20,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:37:20,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:37:20,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:37:20,902 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:37:20,902 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:37:20,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2025-03-17 06:37:22,025 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07eaf4486/3680f0da7ca84c28853d5686f0092bf8/FLAG83a000983 [2025-03-17 06:37:22,278 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:37:22,280 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2025-03-17 06:37:22,292 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07eaf4486/3680f0da7ca84c28853d5686f0092bf8/FLAG83a000983 [2025-03-17 06:37:22,592 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07eaf4486/3680f0da7ca84c28853d5686f0092bf8 [2025-03-17 06:37:22,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:37:22,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:37:22,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:37:22,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:37:22,601 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:37:22,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f98fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22, skipping insertion in model container [2025-03-17 06:37:22,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,619 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:37:22,773 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/chl-nzb-file-symm.wvr.c[4955,4968] [2025-03-17 06:37:22,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:37:22,795 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:37:22,824 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/chl-nzb-file-symm.wvr.c[4955,4968] [2025-03-17 06:37:22,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:37:22,837 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:37:22,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22 WrapperNode [2025-03-17 06:37:22,838 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:37:22,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:37:22,839 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:37:22,839 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:37:22,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,849 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,879 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 399 [2025-03-17 06:37:22,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:37:22,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:37:22,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:37:22,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:37:22,888 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,891 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,913 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-17 06:37:22,914 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,924 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,925 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,930 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:37:22,930 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:37:22,930 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:37:22,930 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:37:22,931 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (1/1) ... [2025-03-17 06:37:22,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:37:22,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:22,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:37:22,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:37:22,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:37:22,977 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:37:22,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:37:22,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:37:22,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:37:22,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:37:22,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:37:22,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:37:22,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:37:22,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:37:22,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:37:22,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:37:22,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:37:22,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:37:22,980 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:37:23,068 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:37:23,069 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:37:23,529 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:37:23,529 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:37:23,893 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:37:23,893 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:37:23,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:37:23 BoogieIcfgContainer [2025-03-17 06:37:23,893 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:37:23,895 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:37:23,895 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:37:23,929 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:37:23,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:37:22" (1/3) ... [2025-03-17 06:37:23,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a154bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:37:23, skipping insertion in model container [2025-03-17 06:37:23,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:37:22" (2/3) ... [2025-03-17 06:37:23,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a154bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:37:23, skipping insertion in model container [2025-03-17 06:37:23,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:37:23" (3/3) ... [2025-03-17 06:37:23,931 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2025-03-17 06:37:23,942 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:37:23,943 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-symm.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-17 06:37:23,943 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:37:24,005 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 06:37:24,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2025-03-17 06:37:24,054 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2025-03-17 06:37:24,057 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:37:24,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2025-03-17 06:37:24,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2025-03-17 06:37:24,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2025-03-17 06:37:24,071 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:37:24,082 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;@649e1ec2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:37:24,083 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-17 06:37:24,093 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:37:24,093 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2025-03-17 06:37:24,093 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:37:24,093 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:24,094 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:24,094 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:24,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:24,098 INFO L85 PathProgramCache]: Analyzing trace with hash -486233231, now seen corresponding path program 1 times [2025-03-17 06:37:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:24,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830954579] [2025-03-17 06:37:24,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:24,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:24,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 06:37:24,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 06:37:24,237 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:24,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:24,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:24,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830954579] [2025-03-17 06:37:24,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830954579] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:24,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:24,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:37:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983003934] [2025-03-17 06:37:24,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:24,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:37:24,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:24,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:37:24,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:37:24,475 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:24,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:24,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:24,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:24,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:24,656 INFO L124 PetriNetUnfolderBase]: 202/329 cut-off events. [2025-03-17 06:37:24,656 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-17 06:37:24,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 329 events. 202/329 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1006 event pairs, 138 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 620. Up to 327 conditions per place. [2025-03-17 06:37:24,661 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 26 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2025-03-17 06:37:24,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 134 flow [2025-03-17 06:37:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:37:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:37:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2025-03-17 06:37:24,672 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2025-03-17 06:37:24,674 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 3 states and 43 transitions. [2025-03-17 06:37:24,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 134 flow [2025-03-17 06:37:24,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 06:37:24,680 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 84 flow [2025-03-17 06:37:24,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2025-03-17 06:37:24,684 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2025-03-17 06:37:24,684 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 84 flow [2025-03-17 06:37:24,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:24,684 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:24,684 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:24,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:37:24,684 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:24,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:24,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2101858468, now seen corresponding path program 1 times [2025-03-17 06:37:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:24,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279999303] [2025-03-17 06:37:24,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:24,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:24,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:37:24,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:37:24,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:24,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:37:24,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:24,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279999303] [2025-03-17 06:37:24,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279999303] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:24,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99268319] [2025-03-17 06:37:24,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:24,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:24,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:24,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:24,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:37:24,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:37:25,019 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:37:25,019 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:25,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:25,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 06:37:25,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:37:25,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:37:25,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99268319] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:25,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:25,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-03-17 06:37:25,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297610162] [2025-03-17 06:37:25,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:25,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:37:25,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:25,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:37:25,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:37:25,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:25,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:25,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:25,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:25,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:25,238 INFO L124 PetriNetUnfolderBase]: 202/335 cut-off events. [2025-03-17 06:37:25,238 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-17 06:37:25,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 335 events. 202/335 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1004 event pairs, 138 based on Foata normal form. 3/275 useless extension candidates. Maximal degree in co-relation 666. Up to 327 conditions per place. [2025-03-17 06:37:25,241 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2025-03-17 06:37:25,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 180 flow [2025-03-17 06:37:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:37:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:37:25,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2025-03-17 06:37:25,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2025-03-17 06:37:25,243 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 84 flow. Second operand 6 states and 60 transitions. [2025-03-17 06:37:25,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 180 flow [2025-03-17 06:37:25,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:37:25,244 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 146 flow [2025-03-17 06:37:25,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2025-03-17 06:37:25,245 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2025-03-17 06:37:25,245 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 146 flow [2025-03-17 06:37:25,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:25,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:25,245 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:25,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 06:37:25,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:25,446 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:25,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1466451301, now seen corresponding path program 2 times [2025-03-17 06:37:25,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:25,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405316704] [2025-03-17 06:37:25,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:25,463 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-17 06:37:25,484 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 25 statements. [2025-03-17 06:37:25,484 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:37:25,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-17 06:37:26,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:26,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405316704] [2025-03-17 06:37:26,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405316704] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:26,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:26,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:37:26,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676030793] [2025-03-17 06:37:26,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:26,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:37:26,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:26,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:37:26,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:37:26,150 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:26,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:26,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:26,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:26,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:26,369 INFO L124 PetriNetUnfolderBase]: 244/430 cut-off events. [2025-03-17 06:37:26,370 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:37:26,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 430 events. 244/430 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1537 event pairs, 138 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 848. Up to 319 conditions per place. [2025-03-17 06:37:26,372 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 45 selfloop transitions, 1 changer transitions 9/56 dead transitions. [2025-03-17 06:37:26,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 299 flow [2025-03-17 06:37:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:37:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:37:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2025-03-17 06:37:26,376 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2025-03-17 06:37:26,376 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 146 flow. Second operand 4 states and 61 transitions. [2025-03-17 06:37:26,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 299 flow [2025-03-17 06:37:26,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 283 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-17 06:37:26,378 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 139 flow [2025-03-17 06:37:26,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2025-03-17 06:37:26,379 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2025-03-17 06:37:26,379 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 139 flow [2025-03-17 06:37:26,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:26,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:26,379 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:26,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:37:26,379 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:26,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash 363670033, now seen corresponding path program 3 times [2025-03-17 06:37:26,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:26,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342266745] [2025-03-17 06:37:26,380 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:37:26,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:26,399 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-03-17 06:37:26,417 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 25 statements. [2025-03-17 06:37:26,417 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:37:26,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-17 06:37:26,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:26,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342266745] [2025-03-17 06:37:26,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342266745] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:26,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:26,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:37:26,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031683008] [2025-03-17 06:37:26,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:26,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:37:26,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:26,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:37:26,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:37:26,927 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:26,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:26,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:26,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:26,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:27,140 INFO L124 PetriNetUnfolderBase]: 272/491 cut-off events. [2025-03-17 06:37:27,142 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-03-17 06:37:27,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 491 events. 272/491 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1780 event pairs, 181 based on Foata normal form. 1/436 useless extension candidates. Maximal degree in co-relation 1056. Up to 393 conditions per place. [2025-03-17 06:37:27,144 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 47 selfloop transitions, 1 changer transitions 6/55 dead transitions. [2025-03-17 06:37:27,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 292 flow [2025-03-17 06:37:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:37:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:37:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-03-17 06:37:27,148 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4338235294117647 [2025-03-17 06:37:27,148 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 139 flow. Second operand 4 states and 59 transitions. [2025-03-17 06:37:27,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 292 flow [2025-03-17 06:37:27,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-17 06:37:27,152 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 143 flow [2025-03-17 06:37:27,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2025-03-17 06:37:27,152 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2025-03-17 06:37:27,153 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 143 flow [2025-03-17 06:37:27,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:27,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:27,153 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:27,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:37:27,153 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:27,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:27,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2135069089, now seen corresponding path program 1 times [2025-03-17 06:37:27,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:27,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212355699] [2025-03-17 06:37:27,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:27,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:27,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:37:27,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:37:27,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:27,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-17 06:37:27,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:27,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212355699] [2025-03-17 06:37:27,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212355699] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:27,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:27,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:37:27,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134956837] [2025-03-17 06:37:27,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:27,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:37:27,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:27,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:37:27,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:37:27,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:27,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:27,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:27,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:27,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:27,358 INFO L124 PetriNetUnfolderBase]: 217/397 cut-off events. [2025-03-17 06:37:27,359 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2025-03-17 06:37:27,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 397 events. 217/397 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1336 event pairs, 73 based on Foata normal form. 21/382 useless extension candidates. Maximal degree in co-relation 857. Up to 320 conditions per place. [2025-03-17 06:37:27,361 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 41 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2025-03-17 06:37:27,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 259 flow [2025-03-17 06:37:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:37:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:37:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-03-17 06:37:27,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2025-03-17 06:37:27,362 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 143 flow. Second operand 3 states and 49 transitions. [2025-03-17 06:37:27,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 259 flow [2025-03-17 06:37:27,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 256 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-17 06:37:27,364 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 154 flow [2025-03-17 06:37:27,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2025-03-17 06:37:27,364 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2025-03-17 06:37:27,364 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 154 flow [2025-03-17 06:37:27,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:27,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:27,365 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:27,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:37:27,365 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:27,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:27,365 INFO L85 PathProgramCache]: Analyzing trace with hash 490161997, now seen corresponding path program 1 times [2025-03-17 06:37:27,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:27,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513314351] [2025-03-17 06:37:27,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:27,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:27,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:37:27,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:37:27,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:27,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-17 06:37:27,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:27,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513314351] [2025-03-17 06:37:27,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513314351] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:27,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:27,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:37:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642850771] [2025-03-17 06:37:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:27,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:37:27,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:27,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:37:27,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:37:27,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:27,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:27,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:27,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:27,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:27,518 INFO L124 PetriNetUnfolderBase]: 179/320 cut-off events. [2025-03-17 06:37:27,518 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2025-03-17 06:37:27,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 320 events. 179/320 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 915 event pairs, 128 based on Foata normal form. 4/292 useless extension candidates. Maximal degree in co-relation 697. Up to 304 conditions per place. [2025-03-17 06:37:27,521 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 36 selfloop transitions, 0 changer transitions 4/41 dead transitions. [2025-03-17 06:37:27,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 240 flow [2025-03-17 06:37:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:37:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:37:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2025-03-17 06:37:27,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39215686274509803 [2025-03-17 06:37:27,522 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 154 flow. Second operand 3 states and 40 transitions. [2025-03-17 06:37:27,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 240 flow [2025-03-17 06:37:27,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 231 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-17 06:37:27,524 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 142 flow [2025-03-17 06:37:27,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2025-03-17 06:37:27,525 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2025-03-17 06:37:27,525 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 142 flow [2025-03-17 06:37:27,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:27,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:27,525 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:27,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:37:27,526 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:27,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:27,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1340374633, now seen corresponding path program 1 times [2025-03-17 06:37:27,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:27,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810445495] [2025-03-17 06:37:27,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:27,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:27,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:37:27,547 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:37:27,547 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:27,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 06:37:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810445495] [2025-03-17 06:37:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810445495] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761471171] [2025-03-17 06:37:27,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:27,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:27,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:27,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:27,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:37:27,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:37:27,761 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:37:27,761 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:27,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:27,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:37:27,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 06:37:27,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 06:37:27,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761471171] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:27,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:27,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-17 06:37:27,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528152873] [2025-03-17 06:37:27,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:27,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 06:37:27,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:27,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 06:37:27,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:37:27,844 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:27,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 142 flow. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:27,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:27,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:27,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:27,952 INFO L124 PetriNetUnfolderBase]: 171/306 cut-off events. [2025-03-17 06:37:27,953 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-03-17 06:37:27,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 306 events. 171/306 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 835 event pairs, 128 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 696. Up to 296 conditions per place. [2025-03-17 06:37:27,956 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2025-03-17 06:37:27,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 230 flow [2025-03-17 06:37:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:37:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:37:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 59 transitions. [2025-03-17 06:37:27,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.24789915966386555 [2025-03-17 06:37:27,958 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 142 flow. Second operand 7 states and 59 transitions. [2025-03-17 06:37:27,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 230 flow [2025-03-17 06:37:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 228 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 06:37:27,959 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 186 flow [2025-03-17 06:37:27,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2025-03-17 06:37:27,963 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2025-03-17 06:37:27,963 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 186 flow [2025-03-17 06:37:27,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:27,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:27,963 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:27,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 06:37:28,163 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,SelfDestructingSolverStorable6 [2025-03-17 06:37:28,165 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:28,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:28,165 INFO L85 PathProgramCache]: Analyzing trace with hash 998644438, now seen corresponding path program 2 times [2025-03-17 06:37:28,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:28,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569485231] [2025-03-17 06:37:28,166 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:28,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:28,179 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-03-17 06:37:28,186 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 33 statements. [2025-03-17 06:37:28,186 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:37:28,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:37:28,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569485231] [2025-03-17 06:37:28,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569485231] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:28,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:28,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:37:28,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087705304] [2025-03-17 06:37:28,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:28,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:37:28,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:28,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:37:28,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:37:28,251 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:28,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:28,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:28,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:28,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:28,351 INFO L124 PetriNetUnfolderBase]: 240/423 cut-off events. [2025-03-17 06:37:28,351 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2025-03-17 06:37:28,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 423 events. 240/423 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1304 event pairs, 139 based on Foata normal form. 16/386 useless extension candidates. Maximal degree in co-relation 950. Up to 306 conditions per place. [2025-03-17 06:37:28,353 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 47 selfloop transitions, 3 changer transitions 1/52 dead transitions. [2025-03-17 06:37:28,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 317 flow [2025-03-17 06:37:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:37:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:37:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-03-17 06:37:28,355 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2025-03-17 06:37:28,355 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 186 flow. Second operand 3 states and 49 transitions. [2025-03-17 06:37:28,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 317 flow [2025-03-17 06:37:28,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 293 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-17 06:37:28,356 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 177 flow [2025-03-17 06:37:28,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2025-03-17 06:37:28,357 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2025-03-17 06:37:28,358 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 177 flow [2025-03-17 06:37:28,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:28,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:28,358 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:28,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:37:28,359 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:28,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:28,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1752137352, now seen corresponding path program 1 times [2025-03-17 06:37:28,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:28,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522455510] [2025-03-17 06:37:28,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:28,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:28,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 06:37:28,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 06:37:28,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:28,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:37:28,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:28,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522455510] [2025-03-17 06:37:28,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522455510] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:28,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:28,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:37:28,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228678815] [2025-03-17 06:37:28,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:28,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:37:28,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:28,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:37:28,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:37:28,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:28,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:28,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:28,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:28,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:28,601 INFO L124 PetriNetUnfolderBase]: 333/579 cut-off events. [2025-03-17 06:37:28,602 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2025-03-17 06:37:28,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 579 events. 333/579 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1965 event pairs, 191 based on Foata normal form. 21/558 useless extension candidates. Maximal degree in co-relation 1366. Up to 423 conditions per place. [2025-03-17 06:37:28,604 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 48 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2025-03-17 06:37:28,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 320 flow [2025-03-17 06:37:28,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:37:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:37:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2025-03-17 06:37:28,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2025-03-17 06:37:28,605 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 177 flow. Second operand 3 states and 48 transitions. [2025-03-17 06:37:28,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 320 flow [2025-03-17 06:37:28,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:37:28,606 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 189 flow [2025-03-17 06:37:28,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2025-03-17 06:37:28,607 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2025-03-17 06:37:28,607 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 189 flow [2025-03-17 06:37:28,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:28,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:28,607 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2025-03-17 06:37:28,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:37:28,607 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:28,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1480650257, now seen corresponding path program 1 times [2025-03-17 06:37:28,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:28,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188914438] [2025-03-17 06:37:28,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:28,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:28,624 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 06:37:28,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:37:28,870 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:28,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:34,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:34,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188914438] [2025-03-17 06:37:34,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188914438] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:34,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024949002] [2025-03-17 06:37:34,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:34,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:34,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:34,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:37:34,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 06:37:34,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:37:34,559 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:34,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:34,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-17 06:37:34,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:35,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:37:35,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 356 treesize of output 296 [2025-03-17 06:37:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:37:36,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:38,478 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2025-03-17 06:37:38,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 325 treesize of output 302 [2025-03-17 06:37:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:37:39,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024949002] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:39,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:39,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 34 [2025-03-17 06:37:39,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821400450] [2025-03-17 06:37:39,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:39,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-17 06:37:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:39,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-17 06:37:39,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 06:37:39,256 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:39,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 189 flow. Second operand has 34 states, 34 states have (on average 5.4411764705882355) internal successors, (185), 34 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:39,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:39,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:39,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:43,910 INFO L124 PetriNetUnfolderBase]: 1498/2572 cut-off events. [2025-03-17 06:37:43,910 INFO L125 PetriNetUnfolderBase]: For 824/824 co-relation queries the response was YES. [2025-03-17 06:37:43,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6268 conditions, 2572 events. 1498/2572 cut-off events. For 824/824 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13501 event pairs, 246 based on Foata normal form. 2/2574 useless extension candidates. Maximal degree in co-relation 6254. Up to 455 conditions per place. [2025-03-17 06:37:43,919 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 218 selfloop transitions, 90 changer transitions 39/348 dead transitions. [2025-03-17 06:37:43,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 348 transitions, 1833 flow [2025-03-17 06:37:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-17 06:37:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2025-03-17 06:37:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 490 transitions. [2025-03-17 06:37:43,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2825836216839677 [2025-03-17 06:37:43,921 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 189 flow. Second operand 51 states and 490 transitions. [2025-03-17 06:37:43,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 348 transitions, 1833 flow [2025-03-17 06:37:43,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 348 transitions, 1800 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:37:43,925 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 836 flow [2025-03-17 06:37:43,925 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=836, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2025-03-17 06:37:43,926 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2025-03-17 06:37:43,926 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 836 flow [2025-03-17 06:37:43,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.4411764705882355) internal successors, (185), 34 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:43,926 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:43,926 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2025-03-17 06:37:43,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 06:37:44,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:44,127 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:44,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash -875272597, now seen corresponding path program 2 times [2025-03-17 06:37:44,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:44,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501522683] [2025-03-17 06:37:44,128 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:44,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:44,143 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-17 06:37:44,300 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:37:44,301 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:44,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:48,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501522683] [2025-03-17 06:37:48,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501522683] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33752934] [2025-03-17 06:37:48,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:48,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:48,691 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:48,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:37:48,817 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-17 06:37:48,883 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:37:48,884 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:48,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:48,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-17 06:37:48,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:49,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:37:49,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 274 [2025-03-17 06:37:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:37:50,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:52,694 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:37:52,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 401 treesize of output 361 [2025-03-17 06:37:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:37:53,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33752934] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:53,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:53,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 39 [2025-03-17 06:37:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007707066] [2025-03-17 06:37:53,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:53,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-17 06:37:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:53,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-17 06:37:53,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2025-03-17 06:37:53,594 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:37:53,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 836 flow. Second operand has 39 states, 39 states have (on average 5.358974358974359) internal successors, (209), 39 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:53,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:53,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:37:53,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:55,729 INFO L124 PetriNetUnfolderBase]: 1954/3451 cut-off events. [2025-03-17 06:37:55,729 INFO L125 PetriNetUnfolderBase]: For 7283/7283 co-relation queries the response was YES. [2025-03-17 06:37:55,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10407 conditions, 3451 events. 1954/3451 cut-off events. For 7283/7283 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19609 event pairs, 553 based on Foata normal form. 4/3455 useless extension candidates. Maximal degree in co-relation 10384. Up to 1300 conditions per place. [2025-03-17 06:37:55,744 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 129 selfloop transitions, 79 changer transitions 13/222 dead transitions. [2025-03-17 06:37:55,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 222 transitions, 1760 flow [2025-03-17 06:37:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 06:37:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-17 06:37:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 194 transitions. [2025-03-17 06:37:55,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.25935828877005346 [2025-03-17 06:37:55,746 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 836 flow. Second operand 22 states and 194 transitions. [2025-03-17 06:37:55,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 222 transitions, 1760 flow [2025-03-17 06:37:55,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 222 transitions, 1474 flow, removed 98 selfloop flow, removed 13 redundant places. [2025-03-17 06:37:55,800 INFO L231 Difference]: Finished difference. Result has 117 places, 148 transitions, 1043 flow [2025-03-17 06:37:55,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1043, PETRI_PLACES=117, PETRI_TRANSITIONS=148} [2025-03-17 06:37:55,802 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2025-03-17 06:37:55,802 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 148 transitions, 1043 flow [2025-03-17 06:37:55,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.358974358974359) internal successors, (209), 39 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:55,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:55,803 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2025-03-17 06:37:55,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 06:37:56,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:56,007 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:56,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash 486634537, now seen corresponding path program 3 times [2025-03-17 06:37:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:56,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594693280] [2025-03-17 06:37:56,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:37:56,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:56,027 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-17 06:37:56,102 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 37 statements. [2025-03-17 06:37:56,102 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:37:56,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:37:58,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594693280] [2025-03-17 06:37:58,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594693280] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060821533] [2025-03-17 06:37:58,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:37:58,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:58,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:58,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:58,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:37:58,550 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-17 06:37:58,589 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 37 statements. [2025-03-17 06:37:58,589 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:37:58,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:58,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-17 06:37:58,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:59,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:37:59,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 286 [2025-03-17 06:38:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:38:00,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:02,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:38:02,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 402 treesize of output 368 [2025-03-17 06:38:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:38:02,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060821533] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:02,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:02,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 24 [2025-03-17 06:38:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991407309] [2025-03-17 06:38:02,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:02,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 06:38:02,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:02,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 06:38:02,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2025-03-17 06:38:02,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:38:02,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 148 transitions, 1043 flow. Second operand has 24 states, 24 states have (on average 6.083333333333333) internal successors, (146), 24 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:02,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:02,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:38:02,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:03,892 INFO L124 PetriNetUnfolderBase]: 1942/3429 cut-off events. [2025-03-17 06:38:03,892 INFO L125 PetriNetUnfolderBase]: For 10882/10882 co-relation queries the response was YES. [2025-03-17 06:38:03,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11464 conditions, 3429 events. 1942/3429 cut-off events. For 10882/10882 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19574 event pairs, 593 based on Foata normal form. 2/3431 useless extension candidates. Maximal degree in co-relation 11441. Up to 1340 conditions per place. [2025-03-17 06:38:03,910 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 136 selfloop transitions, 64 changer transitions 9/210 dead transitions. [2025-03-17 06:38:03,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 210 transitions, 1713 flow [2025-03-17 06:38:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:38:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:38:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2025-03-17 06:38:03,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3431372549019608 [2025-03-17 06:38:03,911 INFO L175 Difference]: Start difference. First operand has 117 places, 148 transitions, 1043 flow. Second operand 12 states and 140 transitions. [2025-03-17 06:38:03,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 210 transitions, 1713 flow [2025-03-17 06:38:03,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 210 transitions, 1600 flow, removed 47 selfloop flow, removed 7 redundant places. [2025-03-17 06:38:03,953 INFO L231 Difference]: Finished difference. Result has 123 places, 149 transitions, 1091 flow [2025-03-17 06:38:03,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1091, PETRI_PLACES=123, PETRI_TRANSITIONS=149} [2025-03-17 06:38:03,953 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2025-03-17 06:38:03,953 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 149 transitions, 1091 flow [2025-03-17 06:38:03,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.083333333333333) internal successors, (146), 24 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:03,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:03,954 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2025-03-17 06:38:03,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 06:38:04,154 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,SelfDestructingSolverStorable11 [2025-03-17 06:38:04,154 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:38:04,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash -39231055, now seen corresponding path program 4 times [2025-03-17 06:38:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148165401] [2025-03-17 06:38:04,155 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:38:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:04,167 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-17 06:38:04,247 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:38:04,247 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:38:04,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:08,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:08,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148165401] [2025-03-17 06:38:08,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148165401] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:08,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815224798] [2025-03-17 06:38:08,424 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:38:08,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:08,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:08,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:38:08,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:38:08,536 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-17 06:38:08,572 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:38:08,573 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:38:08,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:08,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-17 06:38:08,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:09,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:38:09,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 356 treesize of output 296 [2025-03-17 06:38:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:38:10,009 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:11,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:38:11,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 378 treesize of output 356 [2025-03-17 06:38:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:38:12,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815224798] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:12,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:12,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 33 [2025-03-17 06:38:12,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299749081] [2025-03-17 06:38:12,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:12,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-17 06:38:12,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:12,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-17 06:38:12,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2025-03-17 06:38:12,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:38:12,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 149 transitions, 1091 flow. Second operand has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:12,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:12,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:38:12,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:15,826 INFO L124 PetriNetUnfolderBase]: 2470/4396 cut-off events. [2025-03-17 06:38:15,826 INFO L125 PetriNetUnfolderBase]: For 13699/13699 co-relation queries the response was YES. [2025-03-17 06:38:15,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14754 conditions, 4396 events. 2470/4396 cut-off events. For 13699/13699 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 27001 event pairs, 714 based on Foata normal form. 4/4400 useless extension candidates. Maximal degree in co-relation 14729. Up to 847 conditions per place. [2025-03-17 06:38:15,848 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 259 selfloop transitions, 125 changer transitions 50/435 dead transitions. [2025-03-17 06:38:15,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 435 transitions, 3329 flow [2025-03-17 06:38:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-03-17 06:38:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2025-03-17 06:38:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 498 transitions. [2025-03-17 06:38:15,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27124183006535946 [2025-03-17 06:38:15,851 INFO L175 Difference]: Start difference. First operand has 123 places, 149 transitions, 1091 flow. Second operand 54 states and 498 transitions. [2025-03-17 06:38:15,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 435 transitions, 3329 flow [2025-03-17 06:38:15,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 435 transitions, 3196 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-17 06:38:15,888 INFO L231 Difference]: Finished difference. Result has 182 places, 198 transitions, 1882 flow [2025-03-17 06:38:15,888 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1882, PETRI_PLACES=182, PETRI_TRANSITIONS=198} [2025-03-17 06:38:15,889 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2025-03-17 06:38:15,889 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 198 transitions, 1882 flow [2025-03-17 06:38:15,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:15,889 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:15,889 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2025-03-17 06:38:15,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:38:16,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:16,090 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:38:16,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2072855681, now seen corresponding path program 5 times [2025-03-17 06:38:16,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:16,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842280893] [2025-03-17 06:38:16,091 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:38:16,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:16,104 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-17 06:38:16,212 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:38:16,213 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 06:38:16,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:38:19,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:19,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842280893] [2025-03-17 06:38:19,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842280893] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:19,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739283738] [2025-03-17 06:38:19,995 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:38:19,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:19,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:19,997 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:38:19,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:38:20,123 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-17 06:38:20,211 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:38:20,211 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 06:38:20,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:20,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-17 06:38:20,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:21,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:38:21,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 367 treesize of output 299 [2025-03-17 06:38:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-17 06:38:21,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:23,370 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2025-03-17 06:38:23,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 373 treesize of output 344 [2025-03-17 06:38:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:38:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739283738] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:24,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:24,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 8] total 39 [2025-03-17 06:38:24,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883426988] [2025-03-17 06:38:24,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:24,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-17 06:38:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:24,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-17 06:38:24,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2025-03-17 06:38:24,384 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:38:24,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 198 transitions, 1882 flow. Second operand has 39 states, 39 states have (on average 5.410256410256411) internal successors, (211), 39 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:24,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:24,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:38:24,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:29,962 INFO L124 PetriNetUnfolderBase]: 4366/7844 cut-off events. [2025-03-17 06:38:29,963 INFO L125 PetriNetUnfolderBase]: For 39195/39195 co-relation queries the response was YES. [2025-03-17 06:38:29,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28399 conditions, 7844 events. 4366/7844 cut-off events. For 39195/39195 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 54398 event pairs, 868 based on Foata normal form. 4/7848 useless extension candidates. Maximal degree in co-relation 28361. Up to 1621 conditions per place. [2025-03-17 06:38:29,999 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 300 selfloop transitions, 214 changer transitions 31/546 dead transitions. [2025-03-17 06:38:29,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 546 transitions, 5534 flow [2025-03-17 06:38:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-17 06:38:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-03-17 06:38:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 428 transitions. [2025-03-17 06:38:30,001 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27365728900255754 [2025-03-17 06:38:30,001 INFO L175 Difference]: Start difference. First operand has 182 places, 198 transitions, 1882 flow. Second operand 46 states and 428 transitions. [2025-03-17 06:38:30,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 546 transitions, 5534 flow [2025-03-17 06:38:30,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 546 transitions, 4945 flow, removed 237 selfloop flow, removed 25 redundant places. [2025-03-17 06:38:30,159 INFO L231 Difference]: Finished difference. Result has 209 places, 315 transitions, 3520 flow [2025-03-17 06:38:30,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3520, PETRI_PLACES=209, PETRI_TRANSITIONS=315} [2025-03-17 06:38:30,160 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2025-03-17 06:38:30,160 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 315 transitions, 3520 flow [2025-03-17 06:38:30,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.410256410256411) internal successors, (211), 39 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:30,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:30,160 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2025-03-17 06:38:30,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 06:38:30,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:30,361 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:38:30,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2121563249, now seen corresponding path program 6 times [2025-03-17 06:38:30,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:30,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499879969] [2025-03-17 06:38:30,361 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:38:30,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:30,372 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-03-17 06:38:30,421 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 37 statements. [2025-03-17 06:38:30,422 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:38:30,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:38:32,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:38:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499879969] [2025-03-17 06:38:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499879969] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:38:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680250018] [2025-03-17 06:38:32,500 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:38:32,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:38:32,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:38:32,502 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:38:32,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:38:32,612 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-03-17 06:38:32,650 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 37 statements. [2025-03-17 06:38:32,650 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 06:38:32,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:38:32,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-17 06:38:32,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:38:33,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:38:33,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 322 treesize of output 266 [2025-03-17 06:38:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:38:34,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:38:35,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:38:35,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 417 treesize of output 395 [2025-03-17 06:38:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 06:38:36,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680250018] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:38:36,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:38:36,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 32 [2025-03-17 06:38:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117664669] [2025-03-17 06:38:36,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:38:36,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 06:38:36,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:38:36,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 06:38:36,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2025-03-17 06:38:36,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-17 06:38:36,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 315 transitions, 3520 flow. Second operand has 32 states, 32 states have (on average 5.625) internal successors, (180), 32 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:36,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:38:36,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-17 06:38:36,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:38:39,625 INFO L124 PetriNetUnfolderBase]: 4657/8405 cut-off events. [2025-03-17 06:38:39,625 INFO L125 PetriNetUnfolderBase]: For 48876/48876 co-relation queries the response was YES. [2025-03-17 06:38:39,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31835 conditions, 8405 events. 4657/8405 cut-off events. For 48876/48876 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 59900 event pairs, 2359 based on Foata normal form. 2/8407 useless extension candidates. Maximal degree in co-relation 31789. Up to 5158 conditions per place. [2025-03-17 06:38:39,672 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 283 selfloop transitions, 173 changer transitions 21/478 dead transitions. [2025-03-17 06:38:39,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 478 transitions, 5696 flow [2025-03-17 06:38:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 06:38:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 06:38:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 234 transitions. [2025-03-17 06:38:39,674 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29923273657289 [2025-03-17 06:38:39,674 INFO L175 Difference]: Start difference. First operand has 209 places, 315 transitions, 3520 flow. Second operand 23 states and 234 transitions. [2025-03-17 06:38:39,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 478 transitions, 5696 flow [2025-03-17 06:38:39,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 478 transitions, 5087 flow, removed 276 selfloop flow, removed 11 redundant places. [2025-03-17 06:38:39,926 INFO L231 Difference]: Finished difference. Result has 231 places, 361 transitions, 4038 flow [2025-03-17 06:38:39,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4038, PETRI_PLACES=231, PETRI_TRANSITIONS=361} [2025-03-17 06:38:39,926 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2025-03-17 06:38:39,926 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 361 transitions, 4038 flow [2025-03-17 06:38:39,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.625) internal successors, (180), 32 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:38:39,926 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:38:39,927 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2025-03-17 06:38:39,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 06:38:40,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 06:38:40,127 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:38:40,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:38:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1273649563, now seen corresponding path program 7 times [2025-03-17 06:38:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:38:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534616729] [2025-03-17 06:38:40,128 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:38:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:38:40,139 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 06:38:40,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:38:40,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:38:40,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat