./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8ab0bd5 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-nzb-file-subst.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 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:42:49,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:42:49,310 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:42:49,314 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:42:49,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:42:49,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:42:49,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:42:49,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:42:49,328 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:42:49,328 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:42:49,328 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:42:49,328 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:42:49,328 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:42:49,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:42:49,328 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:42:49,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:42:49,329 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:42:49,329 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:42:49,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:42:49,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:42:49,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:42:49,330 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:42:49,330 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:42:49,330 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:42:49,330 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:42:49,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:42:49,330 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:42:49,330 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:42:49,331 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:42:49,331 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:42:49,331 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 -> 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 [2025-03-13 21:42:49,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:42:49,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:42:49,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:42:49,556 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:42:49,556 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:42:49,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-03-13 21:42:50,700 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f66721b0a/ffa55f221d614d8b84f3d60d02a5acc9/FLAGaf17ecdda [2025-03-13 21:42:50,960 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:42:50,965 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-03-13 21:42:50,971 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f66721b0a/ffa55f221d614d8b84f3d60d02a5acc9/FLAGaf17ecdda [2025-03-13 21:42:51,280 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f66721b0a/ffa55f221d614d8b84f3d60d02a5acc9 [2025-03-13 21:42:51,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:42:51,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:42:51,285 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:42:51,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:42:51,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:42:51,289 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ec30da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51, skipping insertion in model container [2025-03-13 21:42:51,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,307 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:42:51,469 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-subst.wvr.c[6540,6553] [2025-03-13 21:42:51,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:42:51,487 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:42:51,531 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-subst.wvr.c[6540,6553] [2025-03-13 21:42:51,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:42:51,544 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:42:51,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51 WrapperNode [2025-03-13 21:42:51,545 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:42:51,546 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:42:51,546 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:42:51,546 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:42:51,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,558 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,581 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 591 [2025-03-13 21:42:51,582 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:42:51,582 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:42:51,582 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:42:51,582 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:42:51,590 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,598 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,612 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-13 21:42:51,612 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,612 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,625 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:42:51,634 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:42:51,635 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:42:51,635 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:42:51,635 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (1/1) ... [2025-03-13 21:42:51,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:42:51,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:51,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-13 21:42:51,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-13 21:42:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:42:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-13 21:42:51,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-13 21:42:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-13 21:42:51,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-13 21:42:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-13 21:42:51,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-13 21:42:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:42:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:42:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:42:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:42:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-13 21:42:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:42:51,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:42:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:42:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:42:51,708 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:42:51,840 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:42:51,842 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:42:52,564 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:42:52,565 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:42:52,565 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:42:53,315 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:42:53,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:42:53 BoogieIcfgContainer [2025-03-13 21:42:53,316 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:42:53,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:42:53,318 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:42:53,321 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:42:53,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:42:51" (1/3) ... [2025-03-13 21:42:53,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6f1984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:42:53, skipping insertion in model container [2025-03-13 21:42:53,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:42:51" (2/3) ... [2025-03-13 21:42:53,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6f1984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:42:53, skipping insertion in model container [2025-03-13 21:42:53,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:42:53" (3/3) ... [2025-03-13 21:42:53,322 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2025-03-13 21:42:53,333 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:42:53,334 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-subst.wvr.c that has 4 procedures, 38 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-13 21:42:53,334 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:42:53,449 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-13 21:42:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 49 transitions, 119 flow [2025-03-13 21:42:53,513 INFO L124 PetriNetUnfolderBase]: 12/46 cut-off events. [2025-03-13 21:42:53,516 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:42:53,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 12/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 74 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2025-03-13 21:42:53,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 49 transitions, 119 flow [2025-03-13 21:42:53,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 45 transitions, 108 flow [2025-03-13 21:42:53,529 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:42:53,539 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;@177e8216, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:42:53,540 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-13 21:42:53,566 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:42:53,566 INFO L124 PetriNetUnfolderBase]: 12/44 cut-off events. [2025-03-13 21:42:53,566 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:42:53,566 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:53,567 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:53,567 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:42:53,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:53,571 INFO L85 PathProgramCache]: Analyzing trace with hash 654225432, now seen corresponding path program 1 times [2025-03-13 21:42:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:53,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519708470] [2025-03-13 21:42:53,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:42:53,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:53,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:42:53,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:42:53,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:53,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:42:53,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:53,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519708470] [2025-03-13 21:42:53,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519708470] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:53,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:53,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:42:53,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741320269] [2025-03-13 21:42:53,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:54,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:42:54,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:54,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:42:54,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:42:54,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:42:54,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 108 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) [2025-03-13 21:42:54,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:54,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:42:54,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:54,701 INFO L124 PetriNetUnfolderBase]: 2373/3237 cut-off events. [2025-03-13 21:42:54,702 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2025-03-13 21:42:54,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6649 conditions, 3237 events. 2373/3237 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12259 event pairs, 1692 based on Foata normal form. 0/2556 useless extension candidates. Maximal degree in co-relation 6206. Up to 3234 conditions per place. [2025-03-13 21:42:54,726 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 38 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2025-03-13 21:42:54,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 196 flow [2025-03-13 21:42:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:42:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:42:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2025-03-13 21:42:54,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2025-03-13 21:42:54,736 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 108 flow. Second operand 3 states and 62 transitions. [2025-03-13 21:42:54,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 196 flow [2025-03-13 21:42:54,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-13 21:42:54,746 INFO L231 Difference]: Finished difference. Result has 40 places, 45 transitions, 122 flow [2025-03-13 21:42:54,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=40, PETRI_TRANSITIONS=45} [2025-03-13 21:42:54,752 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2025-03-13 21:42:54,752 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 45 transitions, 122 flow [2025-03-13 21:42:54,752 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) [2025-03-13 21:42:54,752 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:54,753 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:42:54,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:42:54,753 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:42:54,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash 671603589, now seen corresponding path program 1 times [2025-03-13 21:42:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:54,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66267958] [2025-03-13 21:42:54,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:42:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:54,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-13 21:42:54,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:54,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:54,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:42:55,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66267958] [2025-03-13 21:42:55,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66267958] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:42:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468281958] [2025-03-13 21:42:55,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:42:55,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:42:55,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:42:55,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:42:55,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:42:55,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-13 21:42:55,195 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:42:55,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:42:55,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:55,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-13 21:42:55,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:42:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:42:55,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:42:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:42:55,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468281958] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:42:55,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:42:55,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2025-03-13 21:42:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313556728] [2025-03-13 21:42:55,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:42:55,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-13 21:42:55,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:55,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-13 21:42:55,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:42:55,262 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:42:55,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 45 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:55,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:55,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:42:55,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:55,723 INFO L124 PetriNetUnfolderBase]: 2373/3246 cut-off events. [2025-03-13 21:42:55,723 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2025-03-13 21:42:55,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6574 conditions, 3246 events. 2373/3246 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12273 event pairs, 1692 based on Foata normal form. 6/2573 useless extension candidates. Maximal degree in co-relation 6525. Up to 3234 conditions per place. [2025-03-13 21:42:55,736 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 38 selfloop transitions, 15 changer transitions 0/54 dead transitions. [2025-03-13 21:42:55,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 264 flow [2025-03-13 21:42:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:42:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:42:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2025-03-13 21:42:55,737 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2925170068027211 [2025-03-13 21:42:55,737 INFO L175 Difference]: Start difference. First operand has 40 places, 45 transitions, 122 flow. Second operand 6 states and 86 transitions. [2025-03-13 21:42:55,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 264 flow [2025-03-13 21:42:55,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:42:55,739 INFO L231 Difference]: Finished difference. Result has 47 places, 54 transitions, 212 flow [2025-03-13 21:42:55,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=54} [2025-03-13 21:42:55,740 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2025-03-13 21:42:55,740 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 54 transitions, 212 flow [2025-03-13 21:42:55,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:55,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:55,740 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 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, 1] [2025-03-13 21:42:55,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-13 21:42:55,940 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 [2025-03-13 21:42:55,941 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:42:55,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1245307706, now seen corresponding path program 2 times [2025-03-13 21:42:55,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:55,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691481536] [2025-03-13 21:42:55,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:42:55,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:55,966 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-13 21:42:56,121 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 36 statements. [2025-03-13 21:42:56,121 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:42:56,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:57,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:57,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691481536] [2025-03-13 21:42:57,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691481536] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:57,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:57,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:42:57,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544291043] [2025-03-13 21:42:57,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:57,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:42:57,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:57,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:42:57,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:42:57,041 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:42:57,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:57,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:57,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:42:57,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:42:57,855 INFO L124 PetriNetUnfolderBase]: 3867/5443 cut-off events. [2025-03-13 21:42:57,855 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2025-03-13 21:42:57,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11022 conditions, 5443 events. 3867/5443 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24874 event pairs, 1692 based on Foata normal form. 1/4412 useless extension candidates. Maximal degree in co-relation 10934. Up to 3132 conditions per place. [2025-03-13 21:42:57,876 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 111 selfloop transitions, 13 changer transitions 2/127 dead transitions. [2025-03-13 21:42:57,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 127 transitions, 623 flow [2025-03-13 21:42:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:42:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:42:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2025-03-13 21:42:57,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2025-03-13 21:42:57,879 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 212 flow. Second operand 5 states and 135 transitions. [2025-03-13 21:42:57,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 127 transitions, 623 flow [2025-03-13 21:42:57,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 127 transitions, 599 flow, removed 9 selfloop flow, removed 1 redundant places. [2025-03-13 21:42:57,883 INFO L231 Difference]: Finished difference. Result has 53 places, 66 transitions, 291 flow [2025-03-13 21:42:57,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=53, PETRI_TRANSITIONS=66} [2025-03-13 21:42:57,884 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2025-03-13 21:42:57,884 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 66 transitions, 291 flow [2025-03-13 21:42:57,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:57,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:42:57,885 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 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, 1] [2025-03-13 21:42:57,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:42:57,885 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:42:57,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:42:57,886 INFO L85 PathProgramCache]: Analyzing trace with hash 407664732, now seen corresponding path program 3 times [2025-03-13 21:42:57,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:42:57,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86406286] [2025-03-13 21:42:57,886 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:42:57,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:42:57,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 3 equivalence classes. [2025-03-13 21:42:57,998 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 24 of 36 statements. [2025-03-13 21:42:57,998 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:42:57,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:42:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-13 21:42:58,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:42:58,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86406286] [2025-03-13 21:42:58,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86406286] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:42:58,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:42:58,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:42:58,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481623657] [2025-03-13 21:42:58,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:42:58,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:42:58,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:42:58,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:42:58,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:42:58,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:42:58,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:42:58,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:42:58,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:42:58,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:00,353 INFO L124 PetriNetUnfolderBase]: 9197/12921 cut-off events. [2025-03-13 21:43:00,353 INFO L125 PetriNetUnfolderBase]: For 6208/6208 co-relation queries the response was YES. [2025-03-13 21:43:00,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32130 conditions, 12921 events. 9197/12921 cut-off events. For 6208/6208 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 68118 event pairs, 2112 based on Foata normal form. 1/12614 useless extension candidates. Maximal degree in co-relation 32050. Up to 4719 conditions per place. [2025-03-13 21:43:00,410 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 142 selfloop transitions, 56 changer transitions 1/200 dead transitions. [2025-03-13 21:43:00,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 200 transitions, 1141 flow [2025-03-13 21:43:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:43:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:43:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2025-03-13 21:43:00,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5626822157434402 [2025-03-13 21:43:00,414 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 291 flow. Second operand 7 states and 193 transitions. [2025-03-13 21:43:00,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 200 transitions, 1141 flow [2025-03-13 21:43:00,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 200 transitions, 1131 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-13 21:43:00,422 INFO L231 Difference]: Finished difference. Result has 62 places, 115 transitions, 763 flow [2025-03-13 21:43:00,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=763, PETRI_PLACES=62, PETRI_TRANSITIONS=115} [2025-03-13 21:43:00,423 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2025-03-13 21:43:00,423 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 115 transitions, 763 flow [2025-03-13 21:43:00,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:00,424 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:00,424 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 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, 1] [2025-03-13 21:43:00,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:43:00,424 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:00,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:00,425 INFO L85 PathProgramCache]: Analyzing trace with hash 382692966, now seen corresponding path program 4 times [2025-03-13 21:43:00,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:00,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387022051] [2025-03-13 21:43:00,425 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:00,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:00,446 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-13 21:43:00,463 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-13 21:43:00,463 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:00,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-13 21:43:00,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387022051] [2025-03-13 21:43:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387022051] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795932680] [2025-03-13 21:43:00,584 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:00,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:00,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:00,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:00,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:43:00,713 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-13 21:43:00,751 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-13 21:43:00,751 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:00,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:00,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:43:00,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-13 21:43:00,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-13 21:43:00,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795932680] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:43:00,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:43:00,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-13 21:43:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424263712] [2025-03-13 21:43:00,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:43:00,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:43:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:00,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:43:00,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:43:00,849 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:00,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 115 transitions, 763 flow. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:00,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:00,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:00,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:02,275 INFO L124 PetriNetUnfolderBase]: 9197/12924 cut-off events. [2025-03-13 21:43:02,275 INFO L125 PetriNetUnfolderBase]: For 17372/17372 co-relation queries the response was YES. [2025-03-13 21:43:02,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38622 conditions, 12924 events. 9197/12924 cut-off events. For 17372/17372 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 66740 event pairs, 6326 based on Foata normal form. 1/12617 useless extension candidates. Maximal degree in co-relation 38526. Up to 12902 conditions per place. [2025-03-13 21:43:02,325 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 99 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2025-03-13 21:43:02,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 118 transitions, 1015 flow [2025-03-13 21:43:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:43:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:43:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2025-03-13 21:43:02,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2536443148688047 [2025-03-13 21:43:02,327 INFO L175 Difference]: Start difference. First operand has 62 places, 115 transitions, 763 flow. Second operand 7 states and 87 transitions. [2025-03-13 21:43:02,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 118 transitions, 1015 flow [2025-03-13 21:43:02,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 118 transitions, 967 flow, removed 24 selfloop flow, removed 0 redundant places. [2025-03-13 21:43:02,361 INFO L231 Difference]: Finished difference. Result has 69 places, 118 transitions, 783 flow [2025-03-13 21:43:02,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=69, PETRI_TRANSITIONS=118} [2025-03-13 21:43:02,362 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2025-03-13 21:43:02,362 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 118 transitions, 783 flow [2025-03-13 21:43:02,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:02,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:02,362 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1] [2025-03-13 21:43:02,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-13 21:43:02,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:02,566 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:02,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 292873019, now seen corresponding path program 5 times [2025-03-13 21:43:02,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:02,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771434868] [2025-03-13 21:43:02,567 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:02,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:02,583 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 4 equivalence classes. [2025-03-13 21:43:02,796 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:43:02,796 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-13 21:43:02,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-13 21:43:04,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:04,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771434868] [2025-03-13 21:43:04,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771434868] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:04,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677931340] [2025-03-13 21:43:04,329 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:04,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:04,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:04,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:04,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:43:04,460 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 4 equivalence classes. [2025-03-13 21:43:04,625 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:43:04,625 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-13 21:43:04,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:04,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-13 21:43:04,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:43:05,604 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:43:05,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677931340] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:05,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:43:05,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2025-03-13 21:43:05,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107841652] [2025-03-13 21:43:05,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:05,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:05,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:05,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:05,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:43:05,606 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:05,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 118 transitions, 783 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:05,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:05,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:05,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:07,465 INFO L124 PetriNetUnfolderBase]: 10383/14761 cut-off events. [2025-03-13 21:43:07,465 INFO L125 PetriNetUnfolderBase]: For 15988/15988 co-relation queries the response was YES. [2025-03-13 21:43:07,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41696 conditions, 14761 events. 10383/14761 cut-off events. For 15988/15988 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 79631 event pairs, 6106 based on Foata normal form. 1/14392 useless extension candidates. Maximal degree in co-relation 41579. Up to 12413 conditions per place. [2025-03-13 21:43:07,605 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 159 selfloop transitions, 6 changer transitions 8/174 dead transitions. [2025-03-13 21:43:07,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 174 transitions, 1367 flow [2025-03-13 21:43:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:43:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:43:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2025-03-13 21:43:07,606 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4326530612244898 [2025-03-13 21:43:07,606 INFO L175 Difference]: Start difference. First operand has 69 places, 118 transitions, 783 flow. Second operand 5 states and 106 transitions. [2025-03-13 21:43:07,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 174 transitions, 1367 flow [2025-03-13 21:43:07,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 174 transitions, 1331 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-03-13 21:43:07,653 INFO L231 Difference]: Finished difference. Result has 72 places, 121 transitions, 804 flow [2025-03-13 21:43:07,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=804, PETRI_PLACES=72, PETRI_TRANSITIONS=121} [2025-03-13 21:43:07,654 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2025-03-13 21:43:07,654 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 121 transitions, 804 flow [2025-03-13 21:43:07,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:07,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:07,654 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1] [2025-03-13 21:43:07,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-13 21:43:07,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:07,855 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:07,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:07,855 INFO L85 PathProgramCache]: Analyzing trace with hash 192323227, now seen corresponding path program 6 times [2025-03-13 21:43:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:07,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918007823] [2025-03-13 21:43:07,856 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:43:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:07,870 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 4 equivalence classes. [2025-03-13 21:43:07,898 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 24 of 39 statements. [2025-03-13 21:43:07,898 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:43:07,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:43:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918007823] [2025-03-13 21:43:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918007823] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:09,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:09,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:43:09,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946468562] [2025-03-13 21:43:09,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:09,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:43:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:09,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:43:09,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:43:09,130 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:09,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 121 transitions, 804 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:09,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:09,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:09,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:10,864 INFO L124 PetriNetUnfolderBase]: 10788/15352 cut-off events. [2025-03-13 21:43:10,864 INFO L125 PetriNetUnfolderBase]: For 20909/20909 co-relation queries the response was YES. [2025-03-13 21:43:10,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44183 conditions, 15352 events. 10788/15352 cut-off events. For 20909/20909 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 84891 event pairs, 4180 based on Foata normal form. 1/14983 useless extension candidates. Maximal degree in co-relation 44092. Up to 6845 conditions per place. [2025-03-13 21:43:10,924 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 140 selfloop transitions, 44 changer transitions 2/187 dead transitions. [2025-03-13 21:43:10,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 187 transitions, 1442 flow [2025-03-13 21:43:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:43:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:43:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2025-03-13 21:43:10,929 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2025-03-13 21:43:10,929 INFO L175 Difference]: Start difference. First operand has 72 places, 121 transitions, 804 flow. Second operand 6 states and 135 transitions. [2025-03-13 21:43:10,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 187 transitions, 1442 flow [2025-03-13 21:43:10,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 187 transitions, 1431 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-13 21:43:10,995 INFO L231 Difference]: Finished difference. Result has 77 places, 134 transitions, 1071 flow [2025-03-13 21:43:10,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1071, PETRI_PLACES=77, PETRI_TRANSITIONS=134} [2025-03-13 21:43:10,996 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2025-03-13 21:43:10,996 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 134 transitions, 1071 flow [2025-03-13 21:43:10,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:10,996 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:10,996 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1] [2025-03-13 21:43:10,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-13 21:43:10,996 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:10,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash -168228379, now seen corresponding path program 7 times [2025-03-13 21:43:10,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:10,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47160343] [2025-03-13 21:43:10,997 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:43:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:11,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-13 21:43:11,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:43:11,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:11,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:43:11,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:11,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47160343] [2025-03-13 21:43:11,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47160343] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:11,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:11,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:43:11,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400396763] [2025-03-13 21:43:11,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:11,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:11,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:11,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:11,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:43:11,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:11,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 134 transitions, 1071 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:11,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:11,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:11,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:13,837 INFO L124 PetriNetUnfolderBase]: 11365/16242 cut-off events. [2025-03-13 21:43:13,837 INFO L125 PetriNetUnfolderBase]: For 29932/29932 co-relation queries the response was YES. [2025-03-13 21:43:13,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49455 conditions, 16242 events. 11365/16242 cut-off events. For 29932/29932 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 91089 event pairs, 5280 based on Foata normal form. 1/15873 useless extension candidates. Maximal degree in co-relation 49349. Up to 9511 conditions per place. [2025-03-13 21:43:13,922 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 164 selfloop transitions, 37 changer transitions 2/204 dead transitions. [2025-03-13 21:43:13,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 204 transitions, 1748 flow [2025-03-13 21:43:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:43:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:43:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2025-03-13 21:43:13,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2025-03-13 21:43:13,923 INFO L175 Difference]: Start difference. First operand has 77 places, 134 transitions, 1071 flow. Second operand 5 states and 135 transitions. [2025-03-13 21:43:13,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 204 transitions, 1748 flow [2025-03-13 21:43:14,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 204 transitions, 1733 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-03-13 21:43:14,036 INFO L231 Difference]: Finished difference. Result has 83 places, 141 transitions, 1265 flow [2025-03-13 21:43:14,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1265, PETRI_PLACES=83, PETRI_TRANSITIONS=141} [2025-03-13 21:43:14,036 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2025-03-13 21:43:14,037 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 141 transitions, 1265 flow [2025-03-13 21:43:14,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:14,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:14,037 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1] [2025-03-13 21:43:14,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-13 21:43:14,037 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:14,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:14,037 INFO L85 PathProgramCache]: Analyzing trace with hash -520239365, now seen corresponding path program 8 times [2025-03-13 21:43:14,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:14,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755319638] [2025-03-13 21:43:14,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:14,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:14,053 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-13 21:43:14,081 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 39 statements. [2025-03-13 21:43:14,081 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:43:14,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:43:14,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:14,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755319638] [2025-03-13 21:43:14,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755319638] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:14,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:14,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:43:14,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425954241] [2025-03-13 21:43:14,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:14,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:14,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:14,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:14,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:43:14,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:14,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 141 transitions, 1265 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:14,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:14,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:14,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:16,662 INFO L124 PetriNetUnfolderBase]: 14120/20133 cut-off events. [2025-03-13 21:43:16,663 INFO L125 PetriNetUnfolderBase]: For 46850/46850 co-relation queries the response was YES. [2025-03-13 21:43:16,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63383 conditions, 20133 events. 14120/20133 cut-off events. For 46850/46850 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 115754 event pairs, 6053 based on Foata normal form. 1/19664 useless extension candidates. Maximal degree in co-relation 63274. Up to 9654 conditions per place. [2025-03-13 21:43:16,791 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 170 selfloop transitions, 60 changer transitions 2/233 dead transitions. [2025-03-13 21:43:16,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 233 transitions, 2270 flow [2025-03-13 21:43:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:43:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:43:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2025-03-13 21:43:16,792 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5265306122448979 [2025-03-13 21:43:16,792 INFO L175 Difference]: Start difference. First operand has 83 places, 141 transitions, 1265 flow. Second operand 5 states and 129 transitions. [2025-03-13 21:43:16,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 233 transitions, 2270 flow [2025-03-13 21:43:16,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 233 transitions, 2257 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-13 21:43:16,999 INFO L231 Difference]: Finished difference. Result has 90 places, 174 transitions, 1848 flow [2025-03-13 21:43:16,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1848, PETRI_PLACES=90, PETRI_TRANSITIONS=174} [2025-03-13 21:43:17,000 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2025-03-13 21:43:17,000 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 174 transitions, 1848 flow [2025-03-13 21:43:17,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:17,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:17,000 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:17,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-13 21:43:17,000 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:17,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -196742195, now seen corresponding path program 1 times [2025-03-13 21:43:17,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:17,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730161486] [2025-03-13 21:43:17,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:17,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:17,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-13 21:43:17,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-13 21:43:17,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:17,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:43:17,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:17,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730161486] [2025-03-13 21:43:17,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730161486] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:17,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:17,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:43:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167245038] [2025-03-13 21:43:17,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:17,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:43:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:17,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:43:17,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:43:17,112 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:17,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 174 transitions, 1848 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:17,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:17,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:17,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:19,788 INFO L124 PetriNetUnfolderBase]: 17629/25029 cut-off events. [2025-03-13 21:43:19,788 INFO L125 PetriNetUnfolderBase]: For 75811/75811 co-relation queries the response was YES. [2025-03-13 21:43:19,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83672 conditions, 25029 events. 17629/25029 cut-off events. For 75811/75811 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 146599 event pairs, 11006 based on Foata normal form. 470/24559 useless extension candidates. Maximal degree in co-relation 83560. Up to 20138 conditions per place. [2025-03-13 21:43:20,006 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 212 selfloop transitions, 8 changer transitions 1/222 dead transitions. [2025-03-13 21:43:20,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 222 transitions, 2643 flow [2025-03-13 21:43:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:43:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:43:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2025-03-13 21:43:20,007 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2025-03-13 21:43:20,007 INFO L175 Difference]: Start difference. First operand has 90 places, 174 transitions, 1848 flow. Second operand 3 states and 78 transitions. [2025-03-13 21:43:20,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 222 transitions, 2643 flow [2025-03-13 21:43:20,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 222 transitions, 2629 flow, removed 7 selfloop flow, removed 0 redundant places. [2025-03-13 21:43:20,319 INFO L231 Difference]: Finished difference. Result has 93 places, 175 transitions, 1864 flow [2025-03-13 21:43:20,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1864, PETRI_PLACES=93, PETRI_TRANSITIONS=175} [2025-03-13 21:43:20,320 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2025-03-13 21:43:20,320 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 175 transitions, 1864 flow [2025-03-13 21:43:20,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:20,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:20,320 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:20,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-13 21:43:20,320 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:20,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1723647694, now seen corresponding path program 1 times [2025-03-13 21:43:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:20,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177937208] [2025-03-13 21:43:20,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:20,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-13 21:43:20,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-13 21:43:20,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:20,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:43:20,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:20,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177937208] [2025-03-13 21:43:20,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177937208] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:20,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:20,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:20,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985192108] [2025-03-13 21:43:20,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:20,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:43:20,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:20,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:43:20,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:43:20,428 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:20,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 175 transitions, 1864 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:20,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:20,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:20,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:23,204 INFO L124 PetriNetUnfolderBase]: 18573/26442 cut-off events. [2025-03-13 21:43:23,205 INFO L125 PetriNetUnfolderBase]: For 80935/80935 co-relation queries the response was YES. [2025-03-13 21:43:23,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90046 conditions, 26442 events. 18573/26442 cut-off events. For 80935/80935 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 156575 event pairs, 7157 based on Foata normal form. 4/26446 useless extension candidates. Maximal degree in co-relation 89932. Up to 19820 conditions per place. [2025-03-13 21:43:23,461 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 178 selfloop transitions, 13 changer transitions 60/252 dead transitions. [2025-03-13 21:43:23,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 252 transitions, 2994 flow [2025-03-13 21:43:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:43:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:43:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2025-03-13 21:43:23,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2025-03-13 21:43:23,462 INFO L175 Difference]: Start difference. First operand has 93 places, 175 transitions, 1864 flow. Second operand 4 states and 103 transitions. [2025-03-13 21:43:23,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 252 transitions, 2994 flow [2025-03-13 21:43:23,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 252 transitions, 2977 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-13 21:43:23,811 INFO L231 Difference]: Finished difference. Result has 98 places, 159 transitions, 1719 flow [2025-03-13 21:43:23,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1719, PETRI_PLACES=98, PETRI_TRANSITIONS=159} [2025-03-13 21:43:23,812 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2025-03-13 21:43:23,812 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 159 transitions, 1719 flow [2025-03-13 21:43:23,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:23,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:23,812 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:23,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-13 21:43:23,812 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:23,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash -584356674, now seen corresponding path program 1 times [2025-03-13 21:43:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:23,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720243231] [2025-03-13 21:43:23,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:23,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:23,826 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-13 21:43:23,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-13 21:43:23,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:23,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:43:23,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:23,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720243231] [2025-03-13 21:43:23,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720243231] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:23,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:23,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:23,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776400092] [2025-03-13 21:43:23,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:23,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:43:23,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:23,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:43:23,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:43:23,949 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:23,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 159 transitions, 1719 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:23,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:23,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:23,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:27,043 INFO L124 PetriNetUnfolderBase]: 16727/23891 cut-off events. [2025-03-13 21:43:27,043 INFO L125 PetriNetUnfolderBase]: For 72770/72770 co-relation queries the response was YES. [2025-03-13 21:43:27,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80341 conditions, 23891 events. 16727/23891 cut-off events. For 72770/72770 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 139335 event pairs, 9982 based on Foata normal form. 5/23896 useless extension candidates. Maximal degree in co-relation 80233. Up to 16845 conditions per place. [2025-03-13 21:43:27,266 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 157 selfloop transitions, 6 changer transitions 49/213 dead transitions. [2025-03-13 21:43:27,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 213 transitions, 2468 flow [2025-03-13 21:43:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:43:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:43:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2025-03-13 21:43:27,268 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2025-03-13 21:43:27,268 INFO L175 Difference]: Start difference. First operand has 98 places, 159 transitions, 1719 flow. Second operand 4 states and 102 transitions. [2025-03-13 21:43:27,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 213 transitions, 2468 flow [2025-03-13 21:43:27,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 213 transitions, 2426 flow, removed 14 selfloop flow, removed 2 redundant places. [2025-03-13 21:43:27,536 INFO L231 Difference]: Finished difference. Result has 100 places, 139 transitions, 1392 flow [2025-03-13 21:43:27,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1392, PETRI_PLACES=100, PETRI_TRANSITIONS=139} [2025-03-13 21:43:27,537 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2025-03-13 21:43:27,537 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 139 transitions, 1392 flow [2025-03-13 21:43:27,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:27,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:27,537 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:27,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-13 21:43:27,537 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:27,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:27,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1856231768, now seen corresponding path program 2 times [2025-03-13 21:43:27,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:27,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943223770] [2025-03-13 21:43:27,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:27,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:27,561 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-13 21:43:27,568 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 27 of 42 statements. [2025-03-13 21:43:27,572 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:43:27,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:43:27,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:27,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943223770] [2025-03-13 21:43:27,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943223770] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:27,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:27,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:27,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018834180] [2025-03-13 21:43:27,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:27,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:43:27,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:27,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:43:27,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:43:27,650 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:27,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 139 transitions, 1392 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:27,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:27,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:27,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:29,893 INFO L124 PetriNetUnfolderBase]: 14514/20635 cut-off events. [2025-03-13 21:43:29,893 INFO L125 PetriNetUnfolderBase]: For 55196/55196 co-relation queries the response was YES. [2025-03-13 21:43:29,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67936 conditions, 20635 events. 14514/20635 cut-off events. For 55196/55196 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 115932 event pairs, 9229 based on Foata normal form. 4/20639 useless extension candidates. Maximal degree in co-relation 67902. Up to 16845 conditions per place. [2025-03-13 21:43:29,983 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 126 selfloop transitions, 5 changer transitions 48/180 dead transitions. [2025-03-13 21:43:29,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 180 transitions, 1913 flow [2025-03-13 21:43:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:43:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:43:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-03-13 21:43:29,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-13 21:43:29,984 INFO L175 Difference]: Start difference. First operand has 100 places, 139 transitions, 1392 flow. Second operand 4 states and 98 transitions. [2025-03-13 21:43:29,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 180 transitions, 1913 flow [2025-03-13 21:43:30,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 180 transitions, 1841 flow, removed 19 selfloop flow, removed 4 redundant places. [2025-03-13 21:43:30,178 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 998 flow [2025-03-13 21:43:30,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=998, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2025-03-13 21:43:30,179 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2025-03-13 21:43:30,179 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 998 flow [2025-03-13 21:43:30,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:30,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:30,179 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:30,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-13 21:43:30,179 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:30,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash -502637464, now seen corresponding path program 2 times [2025-03-13 21:43:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:30,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126516000] [2025-03-13 21:43:30,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:30,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:30,196 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-13 21:43:30,201 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 27 of 42 statements. [2025-03-13 21:43:30,201 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:43:30,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-13 21:43:30,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:30,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126516000] [2025-03-13 21:43:30,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126516000] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:30,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:30,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:30,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739119236] [2025-03-13 21:43:30,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:30,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:43:30,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:30,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:43:30,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:43:30,268 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:30,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 998 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:30,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:30,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:30,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:32,016 INFO L124 PetriNetUnfolderBase]: 12737/17999 cut-off events. [2025-03-13 21:43:32,016 INFO L125 PetriNetUnfolderBase]: For 41298/41298 co-relation queries the response was YES. [2025-03-13 21:43:32,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57612 conditions, 17999 events. 12737/17999 cut-off events. For 41298/41298 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 96840 event pairs, 5661 based on Foata normal form. 2/18001 useless extension candidates. Maximal degree in co-relation 57579. Up to 16115 conditions per place. [2025-03-13 21:43:32,153 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 115 selfloop transitions, 12 changer transitions 37/165 dead transitions. [2025-03-13 21:43:32,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 165 transitions, 1657 flow [2025-03-13 21:43:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:43:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:43:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-03-13 21:43:32,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4846938775510204 [2025-03-13 21:43:32,154 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 998 flow. Second operand 4 states and 95 transitions. [2025-03-13 21:43:32,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 165 transitions, 1657 flow [2025-03-13 21:43:32,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 165 transitions, 1584 flow, removed 20 selfloop flow, removed 7 redundant places. [2025-03-13 21:43:32,491 INFO L231 Difference]: Finished difference. Result has 93 places, 110 transitions, 921 flow [2025-03-13 21:43:32,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=921, PETRI_PLACES=93, PETRI_TRANSITIONS=110} [2025-03-13 21:43:32,492 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2025-03-13 21:43:32,492 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 110 transitions, 921 flow [2025-03-13 21:43:32,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:32,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:32,492 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:32,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-13 21:43:32,492 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:32,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:32,493 INFO L85 PathProgramCache]: Analyzing trace with hash -199390763, now seen corresponding path program 1 times [2025-03-13 21:43:32,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:32,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917675957] [2025-03-13 21:43:32,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:32,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:32,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-13 21:43:32,581 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-13 21:43:32,581 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:32,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:43:33,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917675957] [2025-03-13 21:43:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917675957] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:33,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:33,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:43:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585629154] [2025-03-13 21:43:33,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:33,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:43:33,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:33,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:43:33,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-13 21:43:33,101 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:33,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 110 transitions, 921 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:33,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:33,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:33,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:35,025 INFO L124 PetriNetUnfolderBase]: 12403/17508 cut-off events. [2025-03-13 21:43:35,025 INFO L125 PetriNetUnfolderBase]: For 31501/31501 co-relation queries the response was YES. [2025-03-13 21:43:35,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53463 conditions, 17508 events. 12403/17508 cut-off events. For 31501/31501 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 93599 event pairs, 5485 based on Foata normal form. 36/17544 useless extension candidates. Maximal degree in co-relation 53435. Up to 13102 conditions per place. [2025-03-13 21:43:35,095 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 135 selfloop transitions, 24 changer transitions 16/176 dead transitions. [2025-03-13 21:43:35,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 176 transitions, 1550 flow [2025-03-13 21:43:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:43:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:43:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2025-03-13 21:43:35,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2025-03-13 21:43:35,096 INFO L175 Difference]: Start difference. First operand has 93 places, 110 transitions, 921 flow. Second operand 6 states and 118 transitions. [2025-03-13 21:43:35,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 176 transitions, 1550 flow [2025-03-13 21:43:35,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 176 transitions, 1392 flow, removed 24 selfloop flow, removed 10 redundant places. [2025-03-13 21:43:35,185 INFO L231 Difference]: Finished difference. Result has 78 places, 108 transitions, 822 flow [2025-03-13 21:43:35,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=822, PETRI_PLACES=78, PETRI_TRANSITIONS=108} [2025-03-13 21:43:35,186 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2025-03-13 21:43:35,186 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 108 transitions, 822 flow [2025-03-13 21:43:35,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:35,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:35,186 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:35,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-13 21:43:35,186 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:35,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:35,187 INFO L85 PathProgramCache]: Analyzing trace with hash -150015777, now seen corresponding path program 2 times [2025-03-13 21:43:35,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:35,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879729038] [2025-03-13 21:43:35,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:35,201 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-13 21:43:35,211 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 27 of 44 statements. [2025-03-13 21:43:35,212 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:43:35,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:43:35,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:35,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879729038] [2025-03-13 21:43:35,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879729038] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:35,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:35,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:43:35,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698293768] [2025-03-13 21:43:35,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:35,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:35,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:35,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:35,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:43:35,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:35,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 108 transitions, 822 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:35,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:35,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:35,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:37,382 INFO L124 PetriNetUnfolderBase]: 13174/18697 cut-off events. [2025-03-13 21:43:37,382 INFO L125 PetriNetUnfolderBase]: For 22950/22950 co-relation queries the response was YES. [2025-03-13 21:43:37,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53300 conditions, 18697 events. 13174/18697 cut-off events. For 22950/22950 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 102625 event pairs, 5517 based on Foata normal form. 35/18732 useless extension candidates. Maximal degree in co-relation 53278. Up to 14608 conditions per place. [2025-03-13 21:43:37,474 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 140 selfloop transitions, 21 changer transitions 14/176 dead transitions. [2025-03-13 21:43:37,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 176 transitions, 1454 flow [2025-03-13 21:43:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:43:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:43:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2025-03-13 21:43:37,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2025-03-13 21:43:37,475 INFO L175 Difference]: Start difference. First operand has 78 places, 108 transitions, 822 flow. Second operand 5 states and 112 transitions. [2025-03-13 21:43:37,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 176 transitions, 1454 flow [2025-03-13 21:43:37,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 176 transitions, 1428 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-13 21:43:37,504 INFO L231 Difference]: Finished difference. Result has 80 places, 108 transitions, 847 flow [2025-03-13 21:43:37,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=847, PETRI_PLACES=80, PETRI_TRANSITIONS=108} [2025-03-13 21:43:37,504 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2025-03-13 21:43:37,505 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 108 transitions, 847 flow [2025-03-13 21:43:37,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:37,505 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:37,505 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:37,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-13 21:43:37,505 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:37,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:37,506 INFO L85 PathProgramCache]: Analyzing trace with hash 845207989, now seen corresponding path program 3 times [2025-03-13 21:43:37,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:37,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819951543] [2025-03-13 21:43:37,506 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:43:37,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:37,523 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 4 equivalence classes. [2025-03-13 21:43:37,540 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 27 of 44 statements. [2025-03-13 21:43:37,540 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:43:37,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:43:37,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:37,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819951543] [2025-03-13 21:43:37,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819951543] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:37,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:37,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:43:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36697781] [2025-03-13 21:43:37,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:37,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:37,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:37,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:37,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:43:37,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:37,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 108 transitions, 847 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:37,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:37,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:37,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:39,890 INFO L124 PetriNetUnfolderBase]: 14105/20159 cut-off events. [2025-03-13 21:43:39,891 INFO L125 PetriNetUnfolderBase]: For 27128/27128 co-relation queries the response was YES. [2025-03-13 21:43:39,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57612 conditions, 20159 events. 14105/20159 cut-off events. For 27128/27128 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 114151 event pairs, 8843 based on Foata normal form. 36/20195 useless extension candidates. Maximal degree in co-relation 57589. Up to 16107 conditions per place. [2025-03-13 21:43:40,018 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 137 selfloop transitions, 11 changer transitions 17/166 dead transitions. [2025-03-13 21:43:40,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 166 transitions, 1377 flow [2025-03-13 21:43:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:43:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:43:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2025-03-13 21:43:40,019 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47346938775510206 [2025-03-13 21:43:40,019 INFO L175 Difference]: Start difference. First operand has 80 places, 108 transitions, 847 flow. Second operand 5 states and 116 transitions. [2025-03-13 21:43:40,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 166 transitions, 1377 flow [2025-03-13 21:43:40,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 166 transitions, 1351 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-13 21:43:40,057 INFO L231 Difference]: Finished difference. Result has 83 places, 107 transitions, 840 flow [2025-03-13 21:43:40,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=840, PETRI_PLACES=83, PETRI_TRANSITIONS=107} [2025-03-13 21:43:40,057 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2025-03-13 21:43:40,057 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 107 transitions, 840 flow [2025-03-13 21:43:40,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:40,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:40,057 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:40,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-13 21:43:40,057 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:40,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:40,058 INFO L85 PathProgramCache]: Analyzing trace with hash 511355135, now seen corresponding path program 4 times [2025-03-13 21:43:40,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:40,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682945044] [2025-03-13 21:43:40,058 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:40,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:40,075 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-13 21:43:40,086 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-13 21:43:40,086 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:40,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:43:40,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:40,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682945044] [2025-03-13 21:43:40,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682945044] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:40,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:40,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:43:40,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470041208] [2025-03-13 21:43:40,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:40,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:40,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:40,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:40,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:43:40,441 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:40,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 107 transitions, 840 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:40,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:40,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:40,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:43,884 INFO L124 PetriNetUnfolderBase]: 18750/26611 cut-off events. [2025-03-13 21:43:43,884 INFO L125 PetriNetUnfolderBase]: For 35212/35212 co-relation queries the response was YES. [2025-03-13 21:43:44,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76632 conditions, 26611 events. 18750/26611 cut-off events. For 35212/35212 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 154979 event pairs, 6788 based on Foata normal form. 1/26612 useless extension candidates. Maximal degree in co-relation 76608. Up to 12121 conditions per place. [2025-03-13 21:43:44,098 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 151 selfloop transitions, 40 changer transitions 4/196 dead transitions. [2025-03-13 21:43:44,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 196 transitions, 1667 flow [2025-03-13 21:43:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:43:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:43:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2025-03-13 21:43:44,173 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2025-03-13 21:43:44,173 INFO L175 Difference]: Start difference. First operand has 83 places, 107 transitions, 840 flow. Second operand 5 states and 131 transitions. [2025-03-13 21:43:44,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 196 transitions, 1667 flow [2025-03-13 21:43:44,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 196 transitions, 1640 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-03-13 21:43:44,222 INFO L231 Difference]: Finished difference. Result has 87 places, 129 transitions, 1198 flow [2025-03-13 21:43:44,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1198, PETRI_PLACES=87, PETRI_TRANSITIONS=129} [2025-03-13 21:43:44,222 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2025-03-13 21:43:44,222 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 129 transitions, 1198 flow [2025-03-13 21:43:44,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:44,223 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:44,223 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:44,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-13 21:43:44,223 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:44,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash 564788537, now seen corresponding path program 5 times [2025-03-13 21:43:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:44,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149412765] [2025-03-13 21:43:44,223 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:44,237 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 4 equivalence classes. [2025-03-13 21:43:44,274 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 44 of 44 statements. [2025-03-13 21:43:44,274 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-13 21:43:44,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:43:44,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:44,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149412765] [2025-03-13 21:43:44,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149412765] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:44,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:44,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:43:44,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646542722] [2025-03-13 21:43:44,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:44,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:44,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:44,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:44,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:43:44,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:44,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 129 transitions, 1198 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:44,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:44,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:44,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:48,105 INFO L124 PetriNetUnfolderBase]: 18720/26545 cut-off events. [2025-03-13 21:43:48,105 INFO L125 PetriNetUnfolderBase]: For 50832/50832 co-relation queries the response was YES. [2025-03-13 21:43:48,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81504 conditions, 26545 events. 18720/26545 cut-off events. For 50832/50832 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 155578 event pairs, 11783 based on Foata normal form. 1/26546 useless extension candidates. Maximal degree in co-relation 81479. Up to 21692 conditions per place. [2025-03-13 21:43:48,300 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 160 selfloop transitions, 12 changer transitions 5/178 dead transitions. [2025-03-13 21:43:48,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 178 transitions, 1755 flow [2025-03-13 21:43:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:43:48,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:43:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2025-03-13 21:43:48,301 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44081632653061226 [2025-03-13 21:43:48,301 INFO L175 Difference]: Start difference. First operand has 87 places, 129 transitions, 1198 flow. Second operand 5 states and 108 transitions. [2025-03-13 21:43:48,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 178 transitions, 1755 flow [2025-03-13 21:43:48,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 178 transitions, 1719 flow, removed 16 selfloop flow, removed 2 redundant places. [2025-03-13 21:43:48,378 INFO L231 Difference]: Finished difference. Result has 91 places, 131 transitions, 1219 flow [2025-03-13 21:43:48,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1219, PETRI_PLACES=91, PETRI_TRANSITIONS=131} [2025-03-13 21:43:48,378 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2025-03-13 21:43:48,378 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 131 transitions, 1219 flow [2025-03-13 21:43:48,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:48,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:48,379 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1] [2025-03-13 21:43:48,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-13 21:43:48,379 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:48,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1598008065, now seen corresponding path program 6 times [2025-03-13 21:43:48,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:48,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866511874] [2025-03-13 21:43:48,379 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:43:48,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:48,393 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 44 statements into 4 equivalence classes. [2025-03-13 21:43:48,402 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 27 of 44 statements. [2025-03-13 21:43:48,402 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:43:48,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:43:48,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:48,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866511874] [2025-03-13 21:43:48,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866511874] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:48,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:48,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:43:48,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107329585] [2025-03-13 21:43:48,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:48,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:48,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:48,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:48,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:43:48,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:48,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 131 transitions, 1219 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:48,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:48,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:48,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:51,621 INFO L124 PetriNetUnfolderBase]: 18587/26323 cut-off events. [2025-03-13 21:43:51,621 INFO L125 PetriNetUnfolderBase]: For 50110/50110 co-relation queries the response was YES. [2025-03-13 21:43:51,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81186 conditions, 26323 events. 18587/26323 cut-off events. For 50110/50110 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 152523 event pairs, 7430 based on Foata normal form. 1/26324 useless extension candidates. Maximal degree in co-relation 81160. Up to 12898 conditions per place. [2025-03-13 21:43:51,828 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 148 selfloop transitions, 35 changer transitions 5/189 dead transitions. [2025-03-13 21:43:51,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 189 transitions, 1808 flow [2025-03-13 21:43:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:43:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:43:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2025-03-13 21:43:51,829 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49795918367346936 [2025-03-13 21:43:51,829 INFO L175 Difference]: Start difference. First operand has 91 places, 131 transitions, 1219 flow. Second operand 5 states and 122 transitions. [2025-03-13 21:43:51,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 189 transitions, 1808 flow [2025-03-13 21:43:51,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 189 transitions, 1793 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-13 21:43:51,972 INFO L231 Difference]: Finished difference. Result has 96 places, 132 transitions, 1321 flow [2025-03-13 21:43:51,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1321, PETRI_PLACES=96, PETRI_TRANSITIONS=132} [2025-03-13 21:43:51,973 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2025-03-13 21:43:51,973 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 132 transitions, 1321 flow [2025-03-13 21:43:51,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:51,973 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:51,973 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:51,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-13 21:43:51,973 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:51,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash -318124724, now seen corresponding path program 1 times [2025-03-13 21:43:51,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:51,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960004079] [2025-03-13 21:43:51,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:51,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:51,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-13 21:43:51,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-13 21:43:51,994 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:51,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-13 21:43:52,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:52,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960004079] [2025-03-13 21:43:52,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960004079] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:52,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:52,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:52,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864421877] [2025-03-13 21:43:52,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:52,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:43:52,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:52,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:43:52,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:43:52,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:52,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 132 transitions, 1321 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:52,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:52,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:52,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:56,217 INFO L124 PetriNetUnfolderBase]: 20005/28333 cut-off events. [2025-03-13 21:43:56,218 INFO L125 PetriNetUnfolderBase]: For 63181/63181 co-relation queries the response was YES. [2025-03-13 21:43:56,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90003 conditions, 28333 events. 20005/28333 cut-off events. For 63181/63181 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 166087 event pairs, 5335 based on Foata normal form. 137/28470 useless extension candidates. Maximal degree in co-relation 89975. Up to 22909 conditions per place. [2025-03-13 21:43:56,351 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 159 selfloop transitions, 17 changer transitions 1/178 dead transitions. [2025-03-13 21:43:56,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 178 transitions, 1884 flow [2025-03-13 21:43:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:43:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:43:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2025-03-13 21:43:56,352 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2025-03-13 21:43:56,352 INFO L175 Difference]: Start difference. First operand has 96 places, 132 transitions, 1321 flow. Second operand 4 states and 99 transitions. [2025-03-13 21:43:56,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 178 transitions, 1884 flow [2025-03-13 21:43:56,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 178 transitions, 1834 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-13 21:43:56,493 INFO L231 Difference]: Finished difference. Result has 98 places, 136 transitions, 1379 flow [2025-03-13 21:43:56,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1379, PETRI_PLACES=98, PETRI_TRANSITIONS=136} [2025-03-13 21:43:56,494 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2025-03-13 21:43:56,494 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 136 transitions, 1379 flow [2025-03-13 21:43:56,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:56,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:56,494 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:56,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-13 21:43:56,494 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:56,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:56,495 INFO L85 PathProgramCache]: Analyzing trace with hash -61776812, now seen corresponding path program 1 times [2025-03-13 21:43:56,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:56,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015305419] [2025-03-13 21:43:56,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:56,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:56,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-13 21:43:56,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-13 21:43:56,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:56,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:43:56,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:56,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015305419] [2025-03-13 21:43:56,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015305419] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:56,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:56,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:56,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955808074] [2025-03-13 21:43:56,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:56,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:43:56,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:56,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:43:56,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:43:56,589 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:56,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 136 transitions, 1379 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:56,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:56,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:56,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:59,551 INFO L124 PetriNetUnfolderBase]: 20135/28528 cut-off events. [2025-03-13 21:43:59,551 INFO L125 PetriNetUnfolderBase]: For 66952/66952 co-relation queries the response was YES. [2025-03-13 21:43:59,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89822 conditions, 28528 events. 20135/28528 cut-off events. For 66952/66952 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 168361 event pairs, 5665 based on Foata normal form. 136/28664 useless extension candidates. Maximal degree in co-relation 89793. Up to 22368 conditions per place. [2025-03-13 21:43:59,759 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 160 selfloop transitions, 16 changer transitions 0/177 dead transitions. [2025-03-13 21:43:59,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 177 transitions, 1892 flow [2025-03-13 21:43:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:43:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:43:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-03-13 21:43:59,760 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-13 21:43:59,760 INFO L175 Difference]: Start difference. First operand has 98 places, 136 transitions, 1379 flow. Second operand 4 states and 98 transitions. [2025-03-13 21:43:59,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 177 transitions, 1892 flow [2025-03-13 21:43:59,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 177 transitions, 1880 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:43:59,869 INFO L231 Difference]: Finished difference. Result has 102 places, 136 transitions, 1420 flow [2025-03-13 21:43:59,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1420, PETRI_PLACES=102, PETRI_TRANSITIONS=136} [2025-03-13 21:43:59,870 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2025-03-13 21:43:59,870 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 136 transitions, 1420 flow [2025-03-13 21:43:59,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:59,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:59,870 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:59,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-13 21:43:59,870 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:43:59,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:59,871 INFO L85 PathProgramCache]: Analyzing trace with hash -69689178, now seen corresponding path program 2 times [2025-03-13 21:43:59,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:59,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319269688] [2025-03-13 21:43:59,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:59,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:59,883 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-13 21:43:59,887 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 30 of 47 statements. [2025-03-13 21:43:59,887 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:43:59,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:43:59,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:59,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319269688] [2025-03-13 21:43:59,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319269688] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:59,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:59,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207090030] [2025-03-13 21:43:59,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:59,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:43:59,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:59,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:43:59,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:43:59,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:43:59,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 136 transitions, 1420 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:59,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:59,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:43:59,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:02,836 INFO L124 PetriNetUnfolderBase]: 19944/28272 cut-off events. [2025-03-13 21:44:02,836 INFO L125 PetriNetUnfolderBase]: For 71050/71050 co-relation queries the response was YES. [2025-03-13 21:44:02,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89812 conditions, 28272 events. 19944/28272 cut-off events. For 71050/71050 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 166431 event pairs, 6205 based on Foata normal form. 32/28304 useless extension candidates. Maximal degree in co-relation 89781. Up to 25509 conditions per place. [2025-03-13 21:44:03,033 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 152 selfloop transitions, 10 changer transitions 7/170 dead transitions. [2025-03-13 21:44:03,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1847 flow [2025-03-13 21:44:03,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:44:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:44:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2025-03-13 21:44:03,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2025-03-13 21:44:03,035 INFO L175 Difference]: Start difference. First operand has 102 places, 136 transitions, 1420 flow. Second operand 4 states and 94 transitions. [2025-03-13 21:44:03,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1847 flow [2025-03-13 21:44:03,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 170 transitions, 1827 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-03-13 21:44:03,154 INFO L231 Difference]: Finished difference. Result has 106 places, 131 transitions, 1385 flow [2025-03-13 21:44:03,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1385, PETRI_PLACES=106, PETRI_TRANSITIONS=131} [2025-03-13 21:44:03,154 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2025-03-13 21:44:03,154 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 131 transitions, 1385 flow [2025-03-13 21:44:03,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:03,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:03,154 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:03,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-13 21:44:03,154 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:44:03,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:03,155 INFO L85 PathProgramCache]: Analyzing trace with hash 322320232, now seen corresponding path program 2 times [2025-03-13 21:44:03,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:03,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933848140] [2025-03-13 21:44:03,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:03,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:03,167 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-13 21:44:03,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 30 of 47 statements. [2025-03-13 21:44:03,171 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:03,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:44:03,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:03,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933848140] [2025-03-13 21:44:03,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933848140] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:03,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:03,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:44:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373795926] [2025-03-13 21:44:03,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:03,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:44:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:03,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:44:03,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:44:03,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:44:03,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 131 transitions, 1385 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:03,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:03,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:44:03,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:05,857 INFO L124 PetriNetUnfolderBase]: 19004/26889 cut-off events. [2025-03-13 21:44:05,857 INFO L125 PetriNetUnfolderBase]: For 70585/70585 co-relation queries the response was YES. [2025-03-13 21:44:06,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86251 conditions, 26889 events. 19004/26889 cut-off events. For 70585/70585 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 157005 event pairs, 12671 based on Foata normal form. 34/26923 useless extension candidates. Maximal degree in co-relation 86218. Up to 24007 conditions per place. [2025-03-13 21:44:06,311 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 161 selfloop transitions, 7 changer transitions 2/171 dead transitions. [2025-03-13 21:44:06,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 171 transitions, 1843 flow [2025-03-13 21:44:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:44:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:44:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2025-03-13 21:44:06,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2025-03-13 21:44:06,312 INFO L175 Difference]: Start difference. First operand has 106 places, 131 transitions, 1385 flow. Second operand 4 states and 94 transitions. [2025-03-13 21:44:06,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 171 transitions, 1843 flow [2025-03-13 21:44:06,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 171 transitions, 1806 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-03-13 21:44:06,472 INFO L231 Difference]: Finished difference. Result has 106 places, 129 transitions, 1321 flow [2025-03-13 21:44:06,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1321, PETRI_PLACES=106, PETRI_TRANSITIONS=129} [2025-03-13 21:44:06,473 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2025-03-13 21:44:06,473 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 129 transitions, 1321 flow [2025-03-13 21:44:06,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:06,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:06,473 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:06,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-13 21:44:06,473 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:44:06,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:06,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1751775176, now seen corresponding path program 3 times [2025-03-13 21:44:06,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:06,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100891431] [2025-03-13 21:44:06,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:06,487 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 47 statements into 4 equivalence classes. [2025-03-13 21:44:06,490 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 30 of 47 statements. [2025-03-13 21:44:06,490 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:44:06,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:44:06,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:06,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100891431] [2025-03-13 21:44:06,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100891431] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:06,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:06,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:44:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848270671] [2025-03-13 21:44:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:06,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:44:06,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:06,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:44:06,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:44:06,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:44:06,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 129 transitions, 1321 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:06,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:06,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:44:06,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:09,396 INFO L124 PetriNetUnfolderBase]: 18052/25519 cut-off events. [2025-03-13 21:44:09,397 INFO L125 PetriNetUnfolderBase]: For 63138/63138 co-relation queries the response was YES. [2025-03-13 21:44:09,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81367 conditions, 25519 events. 18052/25519 cut-off events. For 63138/63138 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 146237 event pairs, 4293 based on Foata normal form. 172/25691 useless extension candidates. Maximal degree in co-relation 81334. Up to 23100 conditions per place. [2025-03-13 21:44:09,570 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 147 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2025-03-13 21:44:09,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 164 transitions, 1736 flow [2025-03-13 21:44:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:44:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:44:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2025-03-13 21:44:09,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2025-03-13 21:44:09,571 INFO L175 Difference]: Start difference. First operand has 106 places, 129 transitions, 1321 flow. Second operand 4 states and 96 transitions. [2025-03-13 21:44:09,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 164 transitions, 1736 flow [2025-03-13 21:44:09,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 164 transitions, 1716 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-13 21:44:09,717 INFO L231 Difference]: Finished difference. Result has 106 places, 128 transitions, 1315 flow [2025-03-13 21:44:09,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1315, PETRI_PLACES=106, PETRI_TRANSITIONS=128} [2025-03-13 21:44:09,718 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2025-03-13 21:44:09,718 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 128 transitions, 1315 flow [2025-03-13 21:44:09,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:09,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:09,718 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:09,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-13 21:44:09,718 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:44:09,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1346351374, now seen corresponding path program 4 times [2025-03-13 21:44:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137905326] [2025-03-13 21:44:09,719 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:09,732 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-13 21:44:09,740 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-13 21:44:09,740 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:44:09,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:44:09,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137905326] [2025-03-13 21:44:09,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137905326] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:09,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:09,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:44:09,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140817684] [2025-03-13 21:44:09,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:09,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:44:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:09,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:44:09,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:44:09,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:44:09,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 128 transitions, 1315 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:09,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:09,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:44:09,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:12,268 INFO L124 PetriNetUnfolderBase]: 18020/25487 cut-off events. [2025-03-13 21:44:12,268 INFO L125 PetriNetUnfolderBase]: For 56139/56139 co-relation queries the response was YES. [2025-03-13 21:44:12,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81081 conditions, 25487 events. 18020/25487 cut-off events. For 56139/56139 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 146891 event pairs, 5721 based on Foata normal form. 32/25519 useless extension candidates. Maximal degree in co-relation 81049. Up to 24803 conditions per place. [2025-03-13 21:44:12,493 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 133 selfloop transitions, 6 changer transitions 11/151 dead transitions. [2025-03-13 21:44:12,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 1644 flow [2025-03-13 21:44:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:44:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:44:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2025-03-13 21:44:12,494 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-03-13 21:44:12,494 INFO L175 Difference]: Start difference. First operand has 106 places, 128 transitions, 1315 flow. Second operand 4 states and 84 transitions. [2025-03-13 21:44:12,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 1644 flow [2025-03-13 21:44:12,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 1624 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-03-13 21:44:12,639 INFO L231 Difference]: Finished difference. Result has 108 places, 125 transitions, 1246 flow [2025-03-13 21:44:12,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1246, PETRI_PLACES=108, PETRI_TRANSITIONS=125} [2025-03-13 21:44:12,640 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2025-03-13 21:44:12,640 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 125 transitions, 1246 flow [2025-03-13 21:44:12,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:12,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:12,640 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:12,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-13 21:44:12,640 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:44:12,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1068133458, now seen corresponding path program 3 times [2025-03-13 21:44:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:12,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814217479] [2025-03-13 21:44:12,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:12,653 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 47 statements into 4 equivalence classes. [2025-03-13 21:44:12,656 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 30 of 47 statements. [2025-03-13 21:44:12,656 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:44:12,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-13 21:44:12,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:12,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814217479] [2025-03-13 21:44:12,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814217479] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:12,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:12,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:44:12,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294809172] [2025-03-13 21:44:12,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:12,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:44:12,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:12,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:44:12,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:44:12,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 49 [2025-03-13 21:44:12,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 125 transitions, 1246 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:12,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:12,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 49 [2025-03-13 21:44:12,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand