./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 e2fb8bed 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-?-e2fb8be-m [2025-03-08 17:29:45,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:29:45,497 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:29:45,504 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:29:45,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:29:45,527 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:29:45,529 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:29:45,529 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:29:45,529 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:29:45,529 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:29:45,530 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:29:45,530 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:29:45,530 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:29:45,530 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:29:45,530 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:29:45,530 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:29:45,531 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:29:45,531 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:29:45,531 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:29:45,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:29:45,531 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:29:45,531 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:29:45,531 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:29:45,531 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:29:45,531 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:29:45,532 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:29:45,532 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:29:45,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:29:45,532 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 [2025-03-08 17:29:45,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:29:45,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:29:45,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:29:45,752 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:29:45,753 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:29:45,754 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2025-03-08 17:29:46,875 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/707acc6a1/ed208c0d27f24921bea19142f9de0e81/FLAG735db53a8 [2025-03-08 17:29:47,086 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:29:47,086 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2025-03-08 17:29:47,098 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/707acc6a1/ed208c0d27f24921bea19142f9de0e81/FLAG735db53a8 [2025-03-08 17:29:47,440 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/707acc6a1/ed208c0d27f24921bea19142f9de0e81 [2025-03-08 17:29:47,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:29:47,443 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:29:47,444 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:29:47,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:29:47,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:29:47,447 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b379646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47, skipping insertion in model container [2025-03-08 17:29:47,447 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,462 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:29:47,573 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] [2025-03-08 17:29:47,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:29:47,586 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:29:47,608 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] [2025-03-08 17:29:47,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:29:47,621 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:29:47,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47 WrapperNode [2025-03-08 17:29:47,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:29:47,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:29:47,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:29:47,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:29:47,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,632 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,659 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 399 [2025-03-08 17:29:47,659 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:29:47,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:29:47,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:29:47,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:29:47,666 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,669 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,690 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]. [2025-03-08 17:29:47,690 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,702 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,704 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,706 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,707 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,709 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:29:47,713 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:29:47,713 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:29:47,713 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:29:47,714 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (1/1) ... [2025-03-08 17:29:47,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:29:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:47,737 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) [2025-03-08 17:29:47,739 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 [2025-03-08 17:29:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:29:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:29:47,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:29:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:29:47,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:29:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:29:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:29:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:29:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:29:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:29:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:29:47,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:29:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:29:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:29:47,757 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:29:47,848 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:29:47,849 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:29:48,291 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:29:48,291 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:29:48,681 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:29:48,681 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:29:48,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:29:48 BoogieIcfgContainer [2025-03-08 17:29:48,682 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:29:48,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:29:48,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:29:48,703 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:29:48,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:29:47" (1/3) ... [2025-03-08 17:29:48,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab9b03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:29:48, skipping insertion in model container [2025-03-08 17:29:48,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:47" (2/3) ... [2025-03-08 17:29:48,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab9b03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:29:48, skipping insertion in model container [2025-03-08 17:29:48,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:29:48" (3/3) ... [2025-03-08 17:29:48,705 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2025-03-08 17:29:48,716 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:29:48,717 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. [2025-03-08 17:29:48,717 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:29:48,789 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:29:48,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2025-03-08 17:29:48,833 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2025-03-08 17:29:48,835 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:29:48,843 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. [2025-03-08 17:29:48,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2025-03-08 17:29:48,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2025-03-08 17:29:48,849 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:29:48,856 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;@24c95c0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:29:48,856 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:29:48,870 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:29:48,870 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2025-03-08 17:29:48,871 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:29:48,871 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:48,871 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:48,872 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:48,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:48,875 INFO L85 PathProgramCache]: Analyzing trace with hash -606871496, now seen corresponding path program 1 times [2025-03-08 17:29:48,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:48,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651810286] [2025-03-08 17:29:48,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:48,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:48,942 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:29:48,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:29:48,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:48,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:29:49,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:49,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651810286] [2025-03-08 17:29:49,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651810286] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:49,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:49,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:29:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374968173] [2025-03-08 17:29:49,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:49,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:29:49,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:49,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:29:49,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:29:49,248 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:29:49,250 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) [2025-03-08 17:29:49,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:49,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:29:49,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:49,420 INFO L124 PetriNetUnfolderBase]: 202/329 cut-off events. [2025-03-08 17:29:49,421 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-08 17:29:49,421 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 1004 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. [2025-03-08 17:29:49,425 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 26 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2025-03-08 17:29:49,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 134 flow [2025-03-08 17:29:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:29:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:29:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2025-03-08 17:29:49,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2025-03-08 17:29:49,438 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 3 states and 43 transitions. [2025-03-08 17:29:49,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 134 flow [2025-03-08 17:29:49,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:29:49,443 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 84 flow [2025-03-08 17:29:49,445 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} [2025-03-08 17:29:49,448 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2025-03-08 17:29:49,449 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 84 flow [2025-03-08 17:29:49,449 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) [2025-03-08 17:29:49,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:49,449 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:49,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:29:49,450 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:49,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:49,451 INFO L85 PathProgramCache]: Analyzing trace with hash -381221047, now seen corresponding path program 1 times [2025-03-08 17:29:49,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:49,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321894729] [2025-03-08 17:29:49,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:49,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:49,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:29:49,495 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:29:49,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:49,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:29:49,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:49,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321894729] [2025-03-08 17:29:49,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321894729] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:49,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383413248] [2025-03-08 17:29:49,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:49,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:49,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:49,638 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) [2025-03-08 17:29:49,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:29:49,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:29:49,763 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:29:49,763 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:49,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:49,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 17:29:49,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:29:49,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:29:49,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383413248] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:49,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:49,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-03-08 17:29:49,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794113795] [2025-03-08 17:29:49,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:49,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:29:49,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:49,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:29:49,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:29:49,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:29:49,835 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) [2025-03-08 17:29:49,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:49,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:29:49,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:50,001 INFO L124 PetriNetUnfolderBase]: 202/335 cut-off events. [2025-03-08 17:29:50,001 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-08 17:29:50,005 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 1007 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. [2025-03-08 17:29:50,012 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2025-03-08 17:29:50,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 180 flow [2025-03-08 17:29:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:29:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:29:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2025-03-08 17:29:50,015 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2025-03-08 17:29:50,015 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 84 flow. Second operand 6 states and 60 transitions. [2025-03-08 17:29:50,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 180 flow [2025-03-08 17:29:50,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:50,018 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 146 flow [2025-03-08 17:29:50,018 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} [2025-03-08 17:29:50,018 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2025-03-08 17:29:50,019 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 146 flow [2025-03-08 17:29:50,019 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) [2025-03-08 17:29:50,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:50,019 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:50,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:29:50,224 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 [2025-03-08 17:29:50,224 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:50,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1648320970, now seen corresponding path program 2 times [2025-03-08 17:29:50,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:50,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738614997] [2025-03-08 17:29:50,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:50,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:50,243 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:29:50,282 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 25 statements. [2025-03-08 17:29:50,283 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:29:50,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 17:29:51,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:51,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738614997] [2025-03-08 17:29:51,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738614997] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:51,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:51,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:29:51,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740811361] [2025-03-08 17:29:51,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:51,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:29:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:51,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:29:51,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:29:51,189 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:29:51,189 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) [2025-03-08 17:29:51,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:51,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:29:51,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:51,434 INFO L124 PetriNetUnfolderBase]: 249/435 cut-off events. [2025-03-08 17:29:51,434 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:29:51,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 435 events. 249/435 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1549 event pairs, 138 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 858. Up to 319 conditions per place. [2025-03-08 17:29:51,436 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 49 selfloop transitions, 1 changer transitions 6/57 dead transitions. [2025-03-08 17:29:51,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 303 flow [2025-03-08 17:29:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:29:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:29:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2025-03-08 17:29:51,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2025-03-08 17:29:51,438 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 146 flow. Second operand 4 states and 61 transitions. [2025-03-08 17:29:51,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 303 flow [2025-03-08 17:29:51,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 287 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:51,439 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 137 flow [2025-03-08 17:29:51,439 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=137, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2025-03-08 17:29:51,440 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2025-03-08 17:29:51,441 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 137 flow [2025-03-08 17:29:51,441 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) [2025-03-08 17:29:51,441 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:51,441 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:51,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:29:51,441 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:51,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:51,442 INFO L85 PathProgramCache]: Analyzing trace with hash -199162796, now seen corresponding path program 3 times [2025-03-08 17:29:51,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:51,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008412689] [2025-03-08 17:29:51,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:51,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:51,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-03-08 17:29:51,469 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 25 statements. [2025-03-08 17:29:51,469 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:29:51,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 17:29:51,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:51,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008412689] [2025-03-08 17:29:51,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008412689] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:51,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:51,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:29:51,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077818045] [2025-03-08 17:29:51,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:51,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:29:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:51,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:29:51,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:29:51,949 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:29:51,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 137 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) [2025-03-08 17:29:51,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:51,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:29:51,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:52,191 INFO L124 PetriNetUnfolderBase]: 404/698 cut-off events. [2025-03-08 17:29:52,193 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2025-03-08 17:29:52,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483 conditions, 698 events. 404/698 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2747 event pairs, 154 based on Foata normal form. 1/627 useless extension candidates. Maximal degree in co-relation 1461. Up to 349 conditions per place. [2025-03-08 17:29:52,196 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 57 selfloop transitions, 8 changer transitions 2/68 dead transitions. [2025-03-08 17:29:52,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 345 flow [2025-03-08 17:29:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:29:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:29:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2025-03-08 17:29:52,199 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2025-03-08 17:29:52,199 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 137 flow. Second operand 4 states and 72 transitions. [2025-03-08 17:29:52,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 345 flow [2025-03-08 17:29:52,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 68 transitions, 339 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-08 17:29:52,203 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 200 flow [2025-03-08 17:29:52,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2025-03-08 17:29:52,204 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2025-03-08 17:29:52,205 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 200 flow [2025-03-08 17:29:52,205 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) [2025-03-08 17:29:52,205 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:52,205 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] [2025-03-08 17:29:52,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:29:52,206 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:52,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:52,206 INFO L85 PathProgramCache]: Analyzing trace with hash 358720181, now seen corresponding path program 1 times [2025-03-08 17:29:52,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:52,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435843852] [2025-03-08 17:29:52,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:52,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:52,219 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:52,226 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:52,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:52,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 17:29:52,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435843852] [2025-03-08 17:29:52,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435843852] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:52,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:52,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:29:52,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891185491] [2025-03-08 17:29:52,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:52,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:29:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:52,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:29:52,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:29:52,277 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:29:52,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 200 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) [2025-03-08 17:29:52,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:52,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:29:52,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:52,461 INFO L124 PetriNetUnfolderBase]: 396/700 cut-off events. [2025-03-08 17:29:52,461 INFO L125 PetriNetUnfolderBase]: For 284/284 co-relation queries the response was YES. [2025-03-08 17:29:52,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1720 conditions, 700 events. 396/700 cut-off events. For 284/284 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2837 event pairs, 214 based on Foata normal form. 9/678 useless extension candidates. Maximal degree in co-relation 1663. Up to 475 conditions per place. [2025-03-08 17:29:52,464 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 54 selfloop transitions, 3 changer transitions 6/64 dead transitions. [2025-03-08 17:29:52,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 379 flow [2025-03-08 17:29:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:29:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:29:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-08 17:29:52,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-03-08 17:29:52,466 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 200 flow. Second operand 3 states and 58 transitions. [2025-03-08 17:29:52,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 379 flow [2025-03-08 17:29:52,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 379 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:29:52,468 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 205 flow [2025-03-08 17:29:52,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2025-03-08 17:29:52,470 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2025-03-08 17:29:52,470 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 205 flow [2025-03-08 17:29:52,471 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) [2025-03-08 17:29:52,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:52,471 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] [2025-03-08 17:29:52,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:29:52,471 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:52,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1399729127, now seen corresponding path program 1 times [2025-03-08 17:29:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:52,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134614197] [2025-03-08 17:29:52,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:52,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:52,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:29:52,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:29:52,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:52,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 17:29:52,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:52,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134614197] [2025-03-08 17:29:52,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134614197] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:52,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:52,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:29:52,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420519465] [2025-03-08 17:29:52,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:52,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:29:52,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:52,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:29:52,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:29:52,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:29:52,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 205 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) [2025-03-08 17:29:52,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:52,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:29:52,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:52,650 INFO L124 PetriNetUnfolderBase]: 286/503 cut-off events. [2025-03-08 17:29:52,650 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2025-03-08 17:29:52,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 503 events. 286/503 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1693 event pairs, 103 based on Foata normal form. 27/503 useless extension candidates. Maximal degree in co-relation 1209. Up to 442 conditions per place. [2025-03-08 17:29:52,653 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 42 selfloop transitions, 2 changer transitions 3/48 dead transitions. [2025-03-08 17:29:52,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 289 flow [2025-03-08 17:29:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:29:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:29:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2025-03-08 17:29:52,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2025-03-08 17:29:52,654 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 205 flow. Second operand 3 states and 47 transitions. [2025-03-08 17:29:52,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 289 flow [2025-03-08 17:29:52,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 278 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-08 17:29:52,656 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 169 flow [2025-03-08 17:29:52,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2025-03-08 17:29:52,657 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2025-03-08 17:29:52,657 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 169 flow [2025-03-08 17:29:52,657 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) [2025-03-08 17:29:52,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:52,657 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] [2025-03-08 17:29:52,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:29:52,658 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:52,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:52,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1094502618, now seen corresponding path program 1 times [2025-03-08 17:29:52,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:52,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774861842] [2025-03-08 17:29:52,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:52,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:52,668 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 17:29:52,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 17:29:52,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:52,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 17:29:52,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774861842] [2025-03-08 17:29:52,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774861842] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455421687] [2025-03-08 17:29:52,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:52,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:52,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:52,768 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) [2025-03-08 17:29:52,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:29:52,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 17:29:52,889 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 17:29:52,889 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:52,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:52,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:29:52,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 17:29:52,943 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 17:29:52,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455421687] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:52,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:52,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-08 17:29:52,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280299401] [2025-03-08 17:29:52,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:52,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:29:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:52,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:29:52,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:29:52,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:29:52,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 169 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) [2025-03-08 17:29:52,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:52,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:29:52,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:53,149 INFO L124 PetriNetUnfolderBase]: 273/478 cut-off events. [2025-03-08 17:29:53,150 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2025-03-08 17:29:53,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 478 events. 273/478 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1550 event pairs, 203 based on Foata normal form. 1/452 useless extension candidates. Maximal degree in co-relation 1099. Up to 467 conditions per place. [2025-03-08 17:29:53,152 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 29 selfloop transitions, 12 changer transitions 0/42 dead transitions. [2025-03-08 17:29:53,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 263 flow [2025-03-08 17:29:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:29:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:29:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 59 transitions. [2025-03-08 17:29:53,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.24789915966386555 [2025-03-08 17:29:53,153 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 169 flow. Second operand 7 states and 59 transitions. [2025-03-08 17:29:53,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 263 flow [2025-03-08 17:29:53,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 42 transitions, 256 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-08 17:29:53,155 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 208 flow [2025-03-08 17:29:53,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=208, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2025-03-08 17:29:53,155 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2025-03-08 17:29:53,156 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 208 flow [2025-03-08 17:29:53,156 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) [2025-03-08 17:29:53,156 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:53,156 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] [2025-03-08 17:29:53,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:53,356 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 [2025-03-08 17:29:53,357 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:53,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1734148965, now seen corresponding path program 2 times [2025-03-08 17:29:53,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:53,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753025012] [2025-03-08 17:29:53,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:53,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:53,373 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-03-08 17:29:53,380 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 33 statements. [2025-03-08 17:29:53,380 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:29:53,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:53,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:53,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753025012] [2025-03-08 17:29:53,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753025012] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:53,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:53,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:29:53,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618572601] [2025-03-08 17:29:53,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:53,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:29:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:53,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:29:53,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:29:53,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:29:53,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 208 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) [2025-03-08 17:29:53,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:53,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:29:53,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:53,585 INFO L124 PetriNetUnfolderBase]: 387/670 cut-off events. [2025-03-08 17:29:53,585 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-03-08 17:29:53,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 670 events. 387/670 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2414 event pairs, 226 based on Foata normal form. 26/644 useless extension candidates. Maximal degree in co-relation 1488. Up to 481 conditions per place. [2025-03-08 17:29:53,588 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 51 selfloop transitions, 4 changer transitions 1/57 dead transitions. [2025-03-08 17:29:53,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 361 flow [2025-03-08 17:29:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:29:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:29:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-03-08 17:29:53,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2025-03-08 17:29:53,589 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 208 flow. Second operand 3 states and 49 transitions. [2025-03-08 17:29:53,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 361 flow [2025-03-08 17:29:53,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 337 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-08 17:29:53,591 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 202 flow [2025-03-08 17:29:53,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2025-03-08 17:29:53,593 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2025-03-08 17:29:53,593 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 202 flow [2025-03-08 17:29:53,593 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) [2025-03-08 17:29:53,593 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:53,593 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] [2025-03-08 17:29:53,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 17:29:53,593 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:53,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:53,593 INFO L85 PathProgramCache]: Analyzing trace with hash -454404341, now seen corresponding path program 1 times [2025-03-08 17:29:53,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:53,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779038253] [2025-03-08 17:29:53,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:53,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:53,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 17:29:53,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 17:29:53,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:53,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:29:53,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779038253] [2025-03-08 17:29:53,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779038253] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:53,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:53,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:29:53,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117825713] [2025-03-08 17:29:53,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:53,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:29:53,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:53,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:29:53,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:29:53,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:29:53,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 202 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) [2025-03-08 17:29:53,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:53,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:29:53,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:53,872 INFO L124 PetriNetUnfolderBase]: 458/792 cut-off events. [2025-03-08 17:29:53,872 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2025-03-08 17:29:53,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1961 conditions, 792 events. 458/792 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2955 event pairs, 282 based on Foata normal form. 21/813 useless extension candidates. Maximal degree in co-relation 1895. Up to 635 conditions per place. [2025-03-08 17:29:53,876 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 50 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2025-03-08 17:29:53,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 344 flow [2025-03-08 17:29:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:29:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:29:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2025-03-08 17:29:53,877 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2025-03-08 17:29:53,877 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 202 flow. Second operand 3 states and 48 transitions. [2025-03-08 17:29:53,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 344 flow [2025-03-08 17:29:53,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:53,878 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 215 flow [2025-03-08 17:29:53,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2025-03-08 17:29:53,879 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2025-03-08 17:29:53,879 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 215 flow [2025-03-08 17:29:53,879 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) [2025-03-08 17:29:53,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:53,879 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] [2025-03-08 17:29:53,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 17:29:53,880 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:53,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2043684236, now seen corresponding path program 1 times [2025-03-08 17:29:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:53,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096979586] [2025-03-08 17:29:53,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:53,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:53,894 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 17:29:54,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:29:54,145 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:54,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:00,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:00,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096979586] [2025-03-08 17:30:00,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096979586] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:00,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540580888] [2025-03-08 17:30:00,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:30:00,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:00,076 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) [2025-03-08 17:30:00,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:30:00,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 17:30:00,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:30:00,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:00,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:00,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-08 17:30:00,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:01,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:01,181 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 [2025-03-08 17:30:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:02,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:04,027 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2025-03-08 17:30:04,027 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 [2025-03-08 17:30:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:04,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540580888] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:04,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:04,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 34 [2025-03-08 17:30:04,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215321057] [2025-03-08 17:30:04,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:04,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-08 17:30:04,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:04,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-08 17:30:04,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 17:30:04,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:30:04,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 215 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) [2025-03-08 17:30:04,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:04,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:30:04,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:08,807 INFO L124 PetriNetUnfolderBase]: 1768/3038 cut-off events. [2025-03-08 17:30:08,807 INFO L125 PetriNetUnfolderBase]: For 1363/1363 co-relation queries the response was YES. [2025-03-08 17:30:08,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7584 conditions, 3038 events. 1768/3038 cut-off events. For 1363/1363 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16524 event pairs, 332 based on Foata normal form. 2/3040 useless extension candidates. Maximal degree in co-relation 7476. Up to 540 conditions per place. [2025-03-08 17:30:08,817 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 217 selfloop transitions, 81 changer transitions 32/331 dead transitions. [2025-03-08 17:30:08,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 331 transitions, 1866 flow [2025-03-08 17:30:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-08 17:30:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-03-08 17:30:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 438 transitions. [2025-03-08 17:30:08,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28005115089514065 [2025-03-08 17:30:08,820 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 215 flow. Second operand 46 states and 438 transitions. [2025-03-08 17:30:08,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 331 transitions, 1866 flow [2025-03-08 17:30:08,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 331 transitions, 1836 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:30:08,824 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 830 flow [2025-03-08 17:30:08,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=830, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2025-03-08 17:30:08,825 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2025-03-08 17:30:08,825 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 830 flow [2025-03-08 17:30:08,825 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) [2025-03-08 17:30:08,825 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:08,825 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] [2025-03-08 17:30:08,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 17:30:09,026 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 [2025-03-08 17:30:09,026 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:09,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash 277062124, now seen corresponding path program 2 times [2025-03-08 17:30:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:09,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784338986] [2025-03-08 17:30:09,027 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:09,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:09,045 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 17:30:09,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:30:09,195 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:09,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:14,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:14,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784338986] [2025-03-08 17:30:14,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784338986] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:14,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261879795] [2025-03-08 17:30:14,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:14,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:14,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:14,218 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) [2025-03-08 17:30:14,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:30:14,315 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 17:30:14,360 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:30:14,360 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:14,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:14,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-08 17:30:14,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:15,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:15,112 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 [2025-03-08 17:30:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:15,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:17,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:17,588 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 387 treesize of output 359 [2025-03-08 17:30:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:18,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261879795] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:18,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:18,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 8] total 36 [2025-03-08 17:30:18,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503085974] [2025-03-08 17:30:18,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:18,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-08 17:30:18,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:18,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-08 17:30:18,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 17:30:18,451 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:30:18,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 830 flow. Second operand has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 36 states have internal predecessors, (200), 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) [2025-03-08 17:30:18,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:18,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:30:18,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:20,586 INFO L124 PetriNetUnfolderBase]: 2306/4040 cut-off events. [2025-03-08 17:30:20,590 INFO L125 PetriNetUnfolderBase]: For 5762/5762 co-relation queries the response was YES. [2025-03-08 17:30:20,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11725 conditions, 4040 events. 2306/4040 cut-off events. For 5762/5762 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23667 event pairs, 704 based on Foata normal form. 2/4042 useless extension candidates. Maximal degree in co-relation 11624. Up to 1571 conditions per place. [2025-03-08 17:30:20,607 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 128 selfloop transitions, 68 changer transitions 11/208 dead transitions. [2025-03-08 17:30:20,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 208 transitions, 1674 flow [2025-03-08 17:30:20,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 17:30:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-08 17:30:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 177 transitions. [2025-03-08 17:30:20,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.26029411764705884 [2025-03-08 17:30:20,610 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 830 flow. Second operand 20 states and 177 transitions. [2025-03-08 17:30:20,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 208 transitions, 1674 flow [2025-03-08 17:30:20,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 208 transitions, 1424 flow, removed 84 selfloop flow, removed 13 redundant places. [2025-03-08 17:30:20,651 INFO L231 Difference]: Finished difference. Result has 107 places, 137 transitions, 979 flow [2025-03-08 17:30:20,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=979, PETRI_PLACES=107, PETRI_TRANSITIONS=137} [2025-03-08 17:30:20,652 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2025-03-08 17:30:20,653 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 137 transitions, 979 flow [2025-03-08 17:30:20,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 36 states have internal predecessors, (200), 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) [2025-03-08 17:30:20,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:20,654 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] [2025-03-08 17:30:20,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 17:30:20,854 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 [2025-03-08 17:30:20,862 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:20,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1104131756, now seen corresponding path program 3 times [2025-03-08 17:30:20,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:20,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540648144] [2025-03-08 17:30:20,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:20,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:20,879 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-08 17:30:20,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 37 statements. [2025-03-08 17:30:20,966 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:20,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:23,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:23,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540648144] [2025-03-08 17:30:23,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540648144] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:23,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823623483] [2025-03-08 17:30:23,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:23,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:23,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:23,415 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) [2025-03-08 17:30:23,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:30:23,510 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-08 17:30:23,542 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 37 statements. [2025-03-08 17:30:23,542 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:23,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:23,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-08 17:30:23,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:24,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:24,710 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 288 [2025-03-08 17:30:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:25,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:26,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:26,672 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 [2025-03-08 17:30:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823623483] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:27,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:27,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 25 [2025-03-08 17:30:27,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892145211] [2025-03-08 17:30:27,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:27,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 17:30:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:27,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 17:30:27,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2025-03-08 17:30:27,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:30:27,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 137 transitions, 979 flow. Second operand has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 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) [2025-03-08 17:30:27,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:27,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:30:27,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:29,531 INFO L124 PetriNetUnfolderBase]: 2604/4572 cut-off events. [2025-03-08 17:30:29,531 INFO L125 PetriNetUnfolderBase]: For 9140/9140 co-relation queries the response was YES. [2025-03-08 17:30:29,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13765 conditions, 4572 events. 2604/4572 cut-off events. For 9140/9140 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27863 event pairs, 744 based on Foata normal form. 2/4574 useless extension candidates. Maximal degree in co-relation 13682. Up to 1673 conditions per place. [2025-03-08 17:30:29,552 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 168 selfloop transitions, 69 changer transitions 13/251 dead transitions. [2025-03-08 17:30:29,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 251 transitions, 1995 flow [2025-03-08 17:30:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:30:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:30:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 191 transitions. [2025-03-08 17:30:29,554 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31209150326797386 [2025-03-08 17:30:29,555 INFO L175 Difference]: Start difference. First operand has 107 places, 137 transitions, 979 flow. Second operand 18 states and 191 transitions. [2025-03-08 17:30:29,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 251 transitions, 1995 flow [2025-03-08 17:30:29,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 251 transitions, 1956 flow, removed 10 selfloop flow, removed 7 redundant places. [2025-03-08 17:30:29,585 INFO L231 Difference]: Finished difference. Result has 122 places, 157 transitions, 1300 flow [2025-03-08 17:30:29,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1300, PETRI_PLACES=122, PETRI_TRANSITIONS=157} [2025-03-08 17:30:29,586 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2025-03-08 17:30:29,586 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 157 transitions, 1300 flow [2025-03-08 17:30:29,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 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) [2025-03-08 17:30:29,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:29,586 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] [2025-03-08 17:30:29,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 17:30:29,786 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 [2025-03-08 17:30:29,787 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:29,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash -811548872, now seen corresponding path program 4 times [2025-03-08 17:30:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715454402] [2025-03-08 17:30:29,787 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:29,799 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-08 17:30:29,861 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:30:29,861 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:29,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:33,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:33,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715454402] [2025-03-08 17:30:33,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715454402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:33,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891945537] [2025-03-08 17:30:33,681 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:33,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:33,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:33,683 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) [2025-03-08 17:30:33,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:30:33,787 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-08 17:30:33,822 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:30:33,822 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:33,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:33,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-08 17:30:33,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:34,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:34,561 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 324 treesize of output 276 [2025-03-08 17:30:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:35,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:37,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:37,328 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 392 treesize of output 358 [2025-03-08 17:30:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:38,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891945537] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:38,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:38,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 33 [2025-03-08 17:30:38,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075682615] [2025-03-08 17:30:38,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:38,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 17:30:38,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:38,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 17:30:38,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 17:30:38,222 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:30:38,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 157 transitions, 1300 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) [2025-03-08 17:30:38,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:38,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:30:38,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:40,544 INFO L124 PetriNetUnfolderBase]: 2656/4680 cut-off events. [2025-03-08 17:30:40,544 INFO L125 PetriNetUnfolderBase]: For 13692/13692 co-relation queries the response was YES. [2025-03-08 17:30:40,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15147 conditions, 4680 events. 2656/4680 cut-off events. For 13692/13692 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 28717 event pairs, 690 based on Foata normal form. 2/4682 useless extension candidates. Maximal degree in co-relation 15064. Up to 858 conditions per place. [2025-03-08 17:30:40,567 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 195 selfloop transitions, 115 changer transitions 32/343 dead transitions. [2025-03-08 17:30:40,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 343 transitions, 2781 flow [2025-03-08 17:30:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-08 17:30:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-08 17:30:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 392 transitions. [2025-03-08 17:30:40,570 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2620320855614973 [2025-03-08 17:30:40,570 INFO L175 Difference]: Start difference. First operand has 122 places, 157 transitions, 1300 flow. Second operand 44 states and 392 transitions. [2025-03-08 17:30:40,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 343 transitions, 2781 flow [2025-03-08 17:30:40,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 343 transitions, 2636 flow, removed 52 selfloop flow, removed 6 redundant places. [2025-03-08 17:30:40,615 INFO L231 Difference]: Finished difference. Result has 158 places, 166 transitions, 1557 flow [2025-03-08 17:30:40,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1557, PETRI_PLACES=158, PETRI_TRANSITIONS=166} [2025-03-08 17:30:40,616 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2025-03-08 17:30:40,616 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 166 transitions, 1557 flow [2025-03-08 17:30:40,617 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) [2025-03-08 17:30:40,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:40,617 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] [2025-03-08 17:30:40,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:30:40,818 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 [2025-03-08 17:30:40,819 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:40,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1435141594, now seen corresponding path program 5 times [2025-03-08 17:30:40,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:40,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187633963] [2025-03-08 17:30:40,820 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:40,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:40,832 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-08 17:30:40,936 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:30:40,937 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 17:30:40,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:44,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:44,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187633963] [2025-03-08 17:30:44,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187633963] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:44,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892116260] [2025-03-08 17:30:44,600 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:44,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:44,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:44,601 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) [2025-03-08 17:30:44,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:30:44,714 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-08 17:30:44,803 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:30:44,803 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 17:30:44,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:44,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-08 17:30:44,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:44,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2025-03-08 17:30:44,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-03-08 17:30:44,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-03-08 17:30:44,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 17:30:44,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-08 17:30:44,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 17:30:44,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-08 17:30:44,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 17:30:44,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-08 17:30:44,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2025-03-08 17:30:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 17:30:44,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 60 [2025-03-08 17:30:44,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 17:30:45,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 17:30:45,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2025-03-08 17:30:46,334 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2025-03-08 17:30:46,334 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 408 treesize of output 336 [2025-03-08 17:30:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 17:30:47,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:49,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892116260] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:49,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:49,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 9] total 44 [2025-03-08 17:30:49,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883829386] [2025-03-08 17:30:49,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:49,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-08 17:30:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:49,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-08 17:30:49,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 17:30:49,987 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:30:49,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 166 transitions, 1557 flow. Second operand has 44 states, 44 states have (on average 5.181818181818182) internal successors, (228), 44 states have internal predecessors, (228), 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) [2025-03-08 17:30:49,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:49,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:30:49,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:55,538 INFO L124 PetriNetUnfolderBase]: 3122/5532 cut-off events. [2025-03-08 17:30:55,538 INFO L125 PetriNetUnfolderBase]: For 17646/17646 co-relation queries the response was YES. [2025-03-08 17:30:55,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18317 conditions, 5532 events. 3122/5532 cut-off events. For 17646/17646 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 35742 event pairs, 954 based on Foata normal form. 4/5536 useless extension candidates. Maximal degree in co-relation 18219. Up to 2281 conditions per place. [2025-03-08 17:30:55,592 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 199 selfloop transitions, 140 changer transitions 36/376 dead transitions. [2025-03-08 17:30:55,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 376 transitions, 3581 flow [2025-03-08 17:30:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-08 17:30:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-08 17:30:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 285 transitions. [2025-03-08 17:30:55,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.24653979238754326 [2025-03-08 17:30:55,594 INFO L175 Difference]: Start difference. First operand has 158 places, 166 transitions, 1557 flow. Second operand 34 states and 285 transitions. [2025-03-08 17:30:55,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 376 transitions, 3581 flow [2025-03-08 17:30:55,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 376 transitions, 3424 flow, removed 10 selfloop flow, removed 28 redundant places. [2025-03-08 17:30:55,651 INFO L231 Difference]: Finished difference. Result has 176 places, 226 transitions, 2467 flow [2025-03-08 17:30:55,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2467, PETRI_PLACES=176, PETRI_TRANSITIONS=226} [2025-03-08 17:30:55,654 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2025-03-08 17:30:55,654 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 226 transitions, 2467 flow [2025-03-08 17:30:55,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.181818181818182) internal successors, (228), 44 states have internal predecessors, (228), 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) [2025-03-08 17:30:55,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:55,654 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] [2025-03-08 17:30:55,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 17:30:55,855 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 [2025-03-08 17:30:55,855 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:55,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:55,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1357221220, now seen corresponding path program 6 times [2025-03-08 17:30:55,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:55,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738956989] [2025-03-08 17:30:55,856 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:55,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:55,867 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-03-08 17:30:55,917 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 37 statements. [2025-03-08 17:30:55,917 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:55,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:57,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:57,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738956989] [2025-03-08 17:30:57,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738956989] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:57,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807759198] [2025-03-08 17:30:57,920 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:57,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:57,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:57,922 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) [2025-03-08 17:30:57,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:30:58,037 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-03-08 17:30:58,084 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 37 statements. [2025-03-08 17:30:58,085 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:58,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:58,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-08 17:30:58,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:58,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:58,857 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 324 treesize of output 272 [2025-03-08 17:30:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:30:59,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:01,150 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2025-03-08 17:31:01,151 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 355 treesize of output 320 [2025-03-08 17:31:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 17:31:01,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807759198] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:01,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:01,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 30 [2025-03-08 17:31:01,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988420781] [2025-03-08 17:31:01,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:01,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 17:31:01,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:01,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 17:31:01,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2025-03-08 17:31:01,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2025-03-08 17:31:01,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 226 transitions, 2467 flow. Second operand has 30 states, 30 states have (on average 5.8) internal successors, (174), 30 states have internal predecessors, (174), 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) [2025-03-08 17:31:01,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:01,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2025-03-08 17:31:01,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:03,636 INFO L124 PetriNetUnfolderBase]: 4012/7176 cut-off events. [2025-03-08 17:31:03,636 INFO L125 PetriNetUnfolderBase]: For 40970/40970 co-relation queries the response was YES. [2025-03-08 17:31:03,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29821 conditions, 7176 events. 4012/7176 cut-off events. For 40970/40970 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 49082 event pairs, 1428 based on Foata normal form. 6/7182 useless extension candidates. Maximal degree in co-relation 29707. Up to 3002 conditions per place. [2025-03-08 17:31:03,668 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 224 selfloop transitions, 143 changer transitions 9/377 dead transitions. [2025-03-08 17:31:03,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 377 transitions, 4428 flow [2025-03-08 17:31:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:31:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:31:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 186 transitions. [2025-03-08 17:31:03,672 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3217993079584775 [2025-03-08 17:31:03,672 INFO L175 Difference]: Start difference. First operand has 176 places, 226 transitions, 2467 flow. Second operand 17 states and 186 transitions. [2025-03-08 17:31:03,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 377 transitions, 4428 flow [2025-03-08 17:31:03,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 377 transitions, 4197 flow, removed 71 selfloop flow, removed 15 redundant places. [2025-03-08 17:31:03,801 INFO L231 Difference]: Finished difference. Result has 185 places, 273 transitions, 3276 flow [2025-03-08 17:31:03,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3276, PETRI_PLACES=185, PETRI_TRANSITIONS=273} [2025-03-08 17:31:03,801 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2025-03-08 17:31:03,801 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 273 transitions, 3276 flow [2025-03-08 17:31:03,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.8) internal successors, (174), 30 states have internal predecessors, (174), 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) [2025-03-08 17:31:03,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:03,802 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] [2025-03-08 17:31:03,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 17:31:04,006 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 [2025-03-08 17:31:04,006 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:04,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:04,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1306654162, now seen corresponding path program 7 times [2025-03-08 17:31:04,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:04,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29637873] [2025-03-08 17:31:04,007 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:04,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:04,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 17:31:04,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:31:04,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:04,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:07,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:07,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29637873] [2025-03-08 17:31:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29637873] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:07,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392307787] [2025-03-08 17:31:07,913 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:07,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:07,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:07,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:07,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:31:08,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 17:31:08,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:31:08,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:08,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:08,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-08 17:31:08,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:08,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:31:08,728 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 278